<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;

class WikiController extends AbstractController
{
    /**
     * Displays the evolution of decrepitude scores from JSON history data
     */
    #[Route('/wiki/decrepitude', name: 'app_admin_wiki_decrepitude')]
    public function decrepitudeScores(): Response
    {
        $outdatedPagesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/outdated_pages.json';
        $histogramFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/staleness_histogram.png';
        
        $regularPages = [];
        $specificPages = [];
        $lastUpdated = null;
        $histogramExists = file_exists($histogramFile);
        
        if (file_exists($outdatedPagesFile)) {
            // Use memory-efficient approach to extract data from the large JSON file
            $maxPages = 100; // Limit the number of pages to prevent memory exhaustion
            
            // Extract regular_pages array
            $regularPages = $this->extractJsonArrayByKey($outdatedPagesFile, 'regular_pages', $maxPages);
            
            // Extract specific_pages array
            $specificPages = $this->extractJsonArrayByKey($outdatedPagesFile, 'specific_pages', $maxPages);
            
            // Extract last_updated value
            $lastUpdated = $this->extractJsonScalarByKey($outdatedPagesFile, 'last_updated');
        }
        
        return $this->render('admin/wiki_decrepitude.html.twig', [
            'regular_pages' => $regularPages,
            'specific_pages' => $specificPages,
            'last_updated' => $lastUpdated,
            'histogram_exists' => $histogramExists,
            'json_exists' => file_exists($outdatedPagesFile)
        ]);
    }
    
    /**
     * Displays the evolution of page rankings over time
     */
    #[Route('/wiki/rankings', name: 'app_admin_wiki_rankings')]
    public function pageRankings(): Response
    {
        $rankingsFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/page_rankings.json';
        
        $timestamps = [];
        $pages = [];
        $globalMetrics = [];
        $lastUpdated = null;
        
        if (file_exists($rankingsFile)) {
            // Load the rankings data
            try {
                $rankingsData = json_decode(file_get_contents($rankingsFile), true);
                
                if (json_last_error() === JSON_ERROR_NONE) {
                    $timestamps = $rankingsData['timestamps'] ?? [];
                    $pages = $rankingsData['pages'] ?? [];
                    $globalMetrics = $rankingsData['global_metrics'] ?? [];
                    
                    // Get the last timestamp as last_updated
                    if (!empty($timestamps)) {
                        $lastUpdated = end($timestamps);
                    }
                }
            } catch (\Exception $e) {
                // Log the error
                error_log("Error loading rankings data: " . $e->getMessage());
            }
        }
        
        return $this->render('admin/wiki_rankings.html.twig', [
            'timestamps' => $timestamps,
            'pages' => $pages,
            'global_metrics' => $globalMetrics,
            'last_updated' => $lastUpdated,
            'json_exists' => file_exists($rankingsFile)
        ]);
    }
    /**
     * Detects incorrect heading hierarchies in a list of sections
     * For example, h4 directly under h2 without h3 in between
     *
     * @param array $sections List of sections with 'level' and 'title' keys
     * @return array List of section indices with hierarchy errors
     */
    private function detectHeadingHierarchyErrors(array $sections): array
    {
        $errors = [];
        $lastLevel = 0;

        foreach ($sections as $index => $section) {
            $currentLevel = isset($section['level']) ? (int)$section['level'] : 0;

            // Skip if level is not set or is 0
            if ($currentLevel === 0) {
                continue;
            }

            // If this is the first section, just record its level
            if ($lastLevel === 0) {
                $lastLevel = $currentLevel;
                continue;
            }

            // Check if the level jump is more than 1
            // For example, h2 -> h4 (skipping h3)
            if ($currentLevel > $lastLevel + 1) {
                $errors[] = $index;
            }

            $lastLevel = $currentLevel;
        }

        return $errors;
    }

    /**
     * Builds an aligned list of sections for English and French
     * Adds empty placeholders in the French column for sections that exist in English but not in French
     *
     * @param array $sectionComparison Section comparison data with 'common', 'en_only', and 'fr_only' keys
     * @return array Aligned section list with 'en' and 'fr' columns
     */
    private function buildAlignedSectionList(array $sectionComparison): array
    {
        $alignedSections = [];

        // First, process common sections (they already have both en and fr)
//        if (isset($sectionComparison['common']) && is_array($sectionComparison['common'])) {
//            foreach ($sectionComparison['common'] as $section) {
//                $alignedSections[] = [
//                    'en' => $section['en'],
//                    'fr' => $section['fr']
//                ];
//            }
//        }

        // Then, process English-only sections and add empty placeholders for French
        if (isset($sectionComparison['en_only']) && is_array($sectionComparison['en_only'])) {
            foreach ($sectionComparison['en_only'] as $section) {
                $alignedSections[] = [
                    'en' => [
                        'title' => $section['title'],
                        'level' => $section['level']
                    ],
                    'fr' => [
                        'title' => '', // Empty placeholder
                        'level' => $section['level'], // Same level as English
                        'is_placeholder' => true
                    ]
                ];
            }
        }
//
//        // Finally, process French-only sections (these will be shown at the end)
        if (isset($sectionComparison['fr_only']) && is_array($sectionComparison['fr_only'])) {
            foreach ($sectionComparison['fr_only'] as $section) {
                $alignedSections[] = [
                    'en' => [
                        'title' => '', // Empty placeholder
                        'level' => $section['level'], // Same level as French
                        'is_placeholder' => true
                    ],
                    'fr' => [
                        'title' => $section['title'],
                        'level' => $section['level']
                    ]
                ];
            }
        }

        return $alignedSections;
    }

    #[Route('/', name: 'app_public_index')]
    public function accueilAction(): Response
    {
        return $this->redirectToRoute('app_admin_wiki');
    }
    #[Route('/wiki/recent-changes', name: 'app_admin_wiki_recent_changes')]
    public function recentChanges(): Response
    {
        $recentChangesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/recent_changes.json';

        // Initialize arrays
        $recentChanges = [];
        $lastUpdated = null;
        $teamMembers = [];

        // Check if the recent changes file exists and load it
        if (file_exists($recentChangesFile)) {
            $recentChangesData = json_decode(file_get_contents($recentChangesFile), true);

            if (isset($recentChangesData['recent_changes']) && is_array($recentChangesData['recent_changes'])) {
                $recentChanges = $recentChangesData['recent_changes'];
                $lastUpdated = isset($recentChangesData['last_updated']) ? $recentChangesData['last_updated'] : null;

                // Process team members statistics
                $teamMembers = $this->processTeamMembersStats($recentChanges);
            }

            // Check if the data is older than 1 hour
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 hour, refresh the data
                if ($diff->h >= 1 || $diff->days > 0) {
//                    $this->refreshRecentChangesData();
//                    return $this->redirectToRoute('app_admin_wiki_recent_changes');
                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshRecentChangesData();

            // Check if the file was created
            if (file_exists($recentChangesFile)) {
//                return $this->redirectToRoute('app_admin_wiki_recent_changes');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier des changements récents.');
            }
        }

        return $this->render('admin/wiki_recent_changes.html.twig', [
            'recent_changes' => $recentChanges,
            'last_updated' => $lastUpdated,
            'team_members' => $teamMembers
        ]);
    }

    /**
     * Process team members statistics from recent changes data
     *
     * @param array $recentChanges Recent changes data
     * @return array Team members statistics
     */
    private function processTeamMembersStats(array $recentChanges): array
    {
        $teamMembers = [];

        // Group changes by user and count modifications
        foreach ($recentChanges as $change) {
            $user = $change['user'];
            $changeSize = $change['change_size'];

            // Initialize user data if not exists
            if (!isset($teamMembers[$user])) {
                $teamMembers[$user] = [
                    'username' => $user,
                    'contributions' => 0,
                    'chars_added' => 0,
                    'chars_changed' => 0,
                    'chars_deleted' => 0,
                    'user_url' => "https://wiki.openstreetmap.org/wiki/User:" . urlencode($user)
                ];
            }

            // Increment contribution count
            $teamMembers[$user]['contributions']++;

            // Process change size
            if (is_numeric($changeSize)) {
                $changeSize = (int)$changeSize;
                if ($changeSize > 0) {
                    $teamMembers[$user]['chars_added'] += $changeSize;
                } elseif ($changeSize < 0) {
                    $teamMembers[$user]['chars_deleted'] += abs($changeSize);
                } else {
                    // Change size is 0, might be a new page or other change
                    $teamMembers[$user]['chars_changed'] += 0;
                }
            } elseif (preg_match('/^\+(\d+)$/', $changeSize, $matches)) {
                // Format like "+123"
                $teamMembers[$user]['chars_added'] += (int)$matches[1];
            } elseif (preg_match('/^−(\d+)$/', $changeSize, $matches)) {
                // Format like "−123" (note: this is not a regular minus sign)
                $teamMembers[$user]['chars_deleted'] += (int)$matches[1];
            }
        }

        // Convert to indexed array and sort by contributions count (descending)
        $teamMembers = array_values($teamMembers);
        usort($teamMembers, function ($a, $b) {
            return $b['contributions'] - $a['contributions'];
        });

        return $teamMembers;
    }

    /**
     * Refresh the recent changes data by running the fetch_recent_changes.py script
     */
    private function refreshRecentChangesData(): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/fetch_recent_changes.py';
            if (file_exists($scriptPath)) {
                exec('python3 ' . $scriptPath . ' --force 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les changements récents. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script fetch_recent_changes.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki/missing-translations', name: 'app_admin_wiki_missing_translations')]
    public function missingTranslations(): Response
    {
        $untranslatedFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/untranslated_french_pages.json';

        // Initialize arrays
        $untranslatedPages = [];
        $lastUpdated = null;

        // Check if the untranslated pages file exists and load it
        if (file_exists($untranslatedFile)) {
            $untranslatedData = json_decode(file_get_contents($untranslatedFile), true);

            if (isset($untranslatedData['untranslated_pages']) && is_array($untranslatedData['untranslated_pages'])) {
                $untranslatedPages = $untranslatedData['untranslated_pages'];
                $lastUpdated = isset($untranslatedData['last_updated']) ? $untranslatedData['last_updated'] : null;
            }

            // Check if the data is older than 1 hour
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 hour, refresh the data
                if ($diff->h >= 1 || $diff->days > 0) {
                    $this->refreshUntranslatedPagesData();
                    return $this->redirectToRoute('app_admin_wiki_missing_translations');
                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshUntranslatedPagesData();

            // Check if the file was created
            if (file_exists($untranslatedFile)) {
                return $this->redirectToRoute('app_admin_wiki_missing_translations');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier des pages sans traduction.');
            }
        }
        
        // Remove duplicates based on page title
        $uniquePages = [];
        $seenTitles = [];
        
        foreach ($untranslatedPages as $page) {
            if (!isset($seenTitles[$page['title']])) {
                $seenTitles[$page['title']] = true;
                $uniquePages[] = $page;
            }
        }
        
        // Sort pages by title
        usort($uniquePages, function($a, $b) {
            return strcasecmp($a['title'], $b['title']);
        });

        return $this->render('admin/wiki_missing_translations.html.twig', [
            'untranslated_pages' => $uniquePages,
            'last_updated' => $lastUpdated
        ]);
    }

    /**
     * Refresh the untranslated pages data by running the find_untranslated_french_pages.py script
     */
    private function refreshUntranslatedPagesData(): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/find_untranslated_french_pages.py';
            if (file_exists($scriptPath)) {
                exec('python3 ' . $scriptPath . ' --force 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les pages sans traduction. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script find_untranslated_french_pages.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki/pages-unavailable-in-french', name: 'app_admin_wiki_pages_unavailable_in_french')]
    public function pagesUnavailableInFrench(): Response
    {
        $unavailablePagesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/pages_unavailable_in_french.json';

        // Initialize arrays
        $groupedPages = [];
        $allPages = [];
        $lastUpdated = null;

        // Check if the unavailable pages file exists and load it
        if (file_exists($unavailablePagesFile)) {
            $unavailableData = json_decode(file_get_contents($unavailablePagesFile), true);

            if (isset($unavailableData['grouped_pages']) && is_array($unavailableData['grouped_pages'])) {
                $groupedPages = $unavailableData['grouped_pages'];
            }

            if (isset($unavailableData['all_pages']) && is_array($unavailableData['all_pages'])) {
                $allPages = $unavailableData['all_pages'];
            }

            $lastUpdated = isset($unavailableData['last_updated']) ? $unavailableData['last_updated'] : null;

            // Check if the data is older than 1 hour
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 hour, refresh the data
                if ($diff->h >= 1 || $diff->days > 0) {
                    $this->refreshPagesUnavailableInFrenchData();
                    return $this->redirectToRoute('app_admin_wiki_pages_unavailable_in_french');
                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshPagesUnavailableInFrenchData();

            // Check if the file was created
            if (file_exists($unavailablePagesFile)) {
                return $this->redirectToRoute('app_admin_wiki_pages_unavailable_in_french');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier des pages non disponibles en français.');
            }
        }

        // Move English pages to the top of the list
        $englishPages = $groupedPages['En'] ?? [];
        unset($groupedPages['En']);

        // Sort other language groups alphabetically
        ksort($groupedPages);

        // Reinsert English pages at the beginning
        if (!empty($englishPages)) {
            $groupedPages = ['En' => $englishPages] + $groupedPages;
        }

        return $this->render('admin/wiki_pages_unavailable_in_french.html.twig', [
            'grouped_pages' => $groupedPages,
            'all_pages' => $allPages,
            'last_updated' => $lastUpdated
        ]);
    }

    /**
     * Refresh the pages unavailable in French data by running the find_pages_unavailable_in_french.py script
     */
    private function refreshPagesUnavailableInFrenchData(): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/find_pages_unavailable_in_french.py';
            if (file_exists($scriptPath)) {
                exec('python3 ' . $scriptPath . ' --force 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les pages non disponibles en français. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script find_pages_unavailable_in_french.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki/osm-fr-groups', name: 'app_admin_wiki_osm_fr_groups')]
    public function osmFrGroups(): Response
    {
        $groupsFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/osm_fr_groups.json';

        // Initialize arrays
        $workingGroups = [];
        $localGroups = [];
        $umapUrl = 'https://umap.openstreetmap.fr/fr/map/groupes-locaux-openstreetmap_152488';
        $lastUpdated = null;

        // Check if the groups file exists and load it
        if (file_exists($groupsFile)) {
            $groupsData = json_decode(file_get_contents($groupsFile), true);

            if (isset($groupsData['working_groups']) && is_array($groupsData['working_groups'])) {
                $workingGroups = $groupsData['working_groups'];
            }

            if (isset($groupsData['local_groups']) && is_array($groupsData['local_groups'])) {
                $localGroups = $groupsData['local_groups'];
            }

            $umapUrl = isset($groupsData['umap_url']) ? $groupsData['umap_url'] : 'https://umap.openstreetmap.fr/fr/map/groupes-locaux-openstreetmap_152488';
            $lastUpdated = isset($groupsData['last_updated']) ? $groupsData['last_updated'] : null;

            // Check if the data is older than 1 hour
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 hour, refresh the data
//                if ($diff->h >= 1 || $diff->days > 0) {
//                    $this->refreshOsmFrGroupsData();
//                    return $this->redirectToRoute('app_admin_wiki_osm_fr_groups');
//                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshOsmFrGroupsData();

            // Check if the file was created
            if (file_exists($groupsFile)) {
//                return $this->redirectToRoute('app_admin_wiki_osm_fr_groups');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier des groupes OSM-FR.');
            }
        }

        // Group working groups by category
        $groupedWorkingGroups = [];
        foreach ($workingGroups as $group) {
            $category = $group['category'] ?? 'Autres';
            if (!isset($groupedWorkingGroups[$category])) {
                $groupedWorkingGroups[$category] = [];
            }
            $groupedWorkingGroups[$category][] = $group;
        }

        // Sort categories alphabetically
        ksort($groupedWorkingGroups);

        return $this->render('admin/wiki_osm_fr_groups.html.twig', [
            'working_groups' => $groupedWorkingGroups,
            'local_groups' => $localGroups,
            'umap_url' => $umapUrl,
            'last_updated' => $lastUpdated
        ]);
    }

    /**
     * Refresh the OSM-FR groups data by running the fetch_osm_fr_groups.py script
     */
    private function refreshOsmFrGroupsData(): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/fetch_osm_fr_groups.py';
            if (file_exists($scriptPath)) {
                exec('python3 ' . $scriptPath . ' --force 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les groupes OSM-FR. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script fetch_osm_fr_groups.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki/suspicious-deletions', name: 'app_admin_wiki_suspicious_deletions')]
    public function suspiciousDeletions(): Response
    {
        $suspiciousDeletesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/suspicious_deletions.json';
        $wordDiffFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/outdated_pages.json';

        // Initialize arrays
        $suspiciousPages = [];
        $wordDiffPages = [];

        // Check if the suspicious deletions file exists and load it
        if (file_exists($suspiciousDeletesFile)) {
            $suspiciousData = json_decode(file_get_contents($suspiciousDeletesFile), true);

            if (isset($suspiciousData['deletions']) && is_array($suspiciousData['deletions'])) {
                $suspiciousPages = $suspiciousData['deletions'];
                $lastUpdated = isset($suspiciousData['last_updated']) ? $suspiciousData['last_updated'] : null;
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            try {
                $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/detect_suspicious_deletions.py';
                if (file_exists($scriptPath)) {
                    exec('python3 ' . $scriptPath . ' 2>&1', $output, $returnCode);

                    if ($returnCode === 0 && file_exists($suspiciousDeletesFile)) {
                        $suspiciousData = json_decode(file_get_contents($suspiciousDeletesFile), true);
                        if (isset($suspiciousData['deletions']) && is_array($suspiciousData['deletions'])) {
                            $suspiciousPages = $suspiciousData['deletions'];
                            $lastUpdated = isset($suspiciousData['last_updated']) ? $suspiciousData['last_updated'] : null;
                        }
                    } else {
                        $this->addFlash('warning', 'Impossible de générer le fichier de suppressions suspectes. Erreur: ' . implode("\n", $output));
                    }
                }
            } catch (\Exception $e) {
                $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
            }
        }

        // Also load the word-diff based suspicious pages for comparison
        if (file_exists($wordDiffFile)) {
            $jsonData = json_decode(file_get_contents($wordDiffFile), true);

            foreach ($jsonData as $page) {
                if (isset($page['fr_page']) && isset($page['en_page'])) {
                    // Calculate deletion percentage
                    $enWordCount = (int)$page['en_page']['word_count'];
                    $frWordCount = (int)$page['fr_page']['word_count'];
                    $wordDiff = $enWordCount - $frWordCount;

                    // If English has more words and the difference is significant (>30%)
                    if ($wordDiff > 0 && $frWordCount > 0 && ($wordDiff / $enWordCount) > 0.3) {
                        $page['deletion_percentage'] = round(($wordDiff / $enWordCount) * 100, 2);
                        $wordDiffPages[] = $page;
                    }
                }
            }

            // Sort by deletion percentage (highest first)
            usort($wordDiffPages, function ($a, $b) {
                return $b['deletion_percentage'] <=> $a['deletion_percentage'];
            });
        }

        return $this->render('admin/wiki_suspicious_deletions.html.twig', [
            'suspicious_pages' => $wordDiffPages,
            'recent_deletions' => $suspiciousPages,
            'last_updated' => $lastUpdated ?? null
        ]);
    }

    #[Route('/wiki/tag-proposals', name: 'app_admin_wiki_tag_proposals')]
    public function tagProposals(): Response
    {
        $proposalsFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/proposals.json';

        // Initialize arrays
        $votingProposals = [];
        $recentProposals = [];
        $lastUpdated = null;

        // Check if the proposals file exists and load it
        if (file_exists($proposalsFile)) {
            $proposalsData = json_decode(file_get_contents($proposalsFile), true);

            if (isset($proposalsData['voting_proposals']) && is_array($proposalsData['voting_proposals'])) {
                $votingProposals = $proposalsData['voting_proposals'];
            }

            if (isset($proposalsData['recent_proposals']) && is_array($proposalsData['recent_proposals'])) {
                $recentProposals = $proposalsData['recent_proposals'];
            }

            $lastUpdated = isset($proposalsData['last_updated']) ? $proposalsData['last_updated'] : null;

            // Check if the data is older than 1 hour
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 hour, refresh the data
//                if ($diff->h >= 1 || $diff->days > 0) {
//                    $this->refreshProposalsData();
//                    return $this->redirectToRoute('app_admin_wiki_tag_proposals');
//                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshProposalsData();

            // Check if the file was created
            if (file_exists($proposalsFile)) {
//                return $this->redirectToRoute('app_admin_wiki_tag_proposals');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier de propositions.');
            }
        }

        // Format the proposals for the template
        $formattedProposals = [];

        foreach ($votingProposals as $proposal) {
            $formattedProposal = [
                'feature' => $proposal['title'],
                'url' => $proposal['url'],
                'description' => 'Proposition en cours de vote',
                'proposer' => $proposal['proposer'] ?? '',
                'status' => $proposal['status'] ?? 'Voting',
                'type' => 'voting'
            ];

            // Add voting information if available
            if (isset($proposal['votes'])) {
                $formattedProposal['votes'] = $proposal['votes'];
                $formattedProposal['total_votes'] = $proposal['total_votes'] ?? 0;
                $formattedProposal['approve_percentage'] = $proposal['approve_percentage'] ?? 0;
                $formattedProposal['oppose_percentage'] = $proposal['oppose_percentage'] ?? 0;
                $formattedProposal['abstain_percentage'] = $proposal['abstain_percentage'] ?? 0;
            }

            $formattedProposals[] = $formattedProposal;
        }

        foreach ($recentProposals as $proposal) {
            $formattedProposals[] = [
                'feature' => $proposal['title'],
                'url' => $proposal['url'],
                'description' => 'Dernière modification: ' . $proposal['last_modified'],
                'proposer' => $proposal['modified_by'],
                'status' => 'Draft',
                'type' => 'recent'
            ];
        }

        return $this->render('admin/wiki_tag_proposals.html.twig', [
            'proposals' => $formattedProposals,
            'last_updated' => $lastUpdated
        ]);
    }

    /**
     * Refresh the proposals data by running the fetch_proposals.py script
     */
    private function refreshProposalsData(): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/fetch_proposals.py';
            if (file_exists($scriptPath)) {
                exec('python3 ' . $scriptPath . ' --force 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les propositions. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script fetch_proposals.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki/random-suggestion', name: 'app_admin_wiki_random_suggestion')]
    public function randomSuggestion(): Response
    {
        $jsonFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/outdated_pages.json';

        if (!file_exists($jsonFile)) {
            $this->addFlash('error', 'Le fichier outdated_pages.json n\'existe pas.');
            return $this->redirectToRoute('app_admin_wiki');
        }

        // Use memory-efficient approach to extract only the necessary data
        $maxItems = 100; // Limit the number of items to prevent memory exhaustion
        
        // Extract regular_pages and specific_pages arrays
        $regularPages = $this->extractJsonArrayByKey($jsonFile, 'regular_pages', $maxItems);
        $specificPages = $this->extractJsonArrayByKey($jsonFile, 'specific_pages', $maxItems);
        
        // Combine them into a single array
        $allPages = array_merge($regularPages, $specificPages);

        if (empty($allPages)) {
            $this->addFlash('error', 'Aucune page à améliorer n\'a été trouvée.');
            return $this->redirectToRoute('app_admin_wiki');
        }

        // Select a random page from the combined pages
        $randomPage = $allPages[array_rand($allPages)];

        return $this->render('admin/wiki_random_suggestion.html.twig', [
            'page' => $randomPage
        ]);
    }

    #[Route('/wiki/create-french/{key}', name: 'app_admin_wiki_create_french', requirements: ['key' => '.+'])]
    public function createFrench(string $key): Response
    {
        // Construct the URLs for the English page and the French page creation form
        $englishUrl = "https://wiki.openstreetmap.org/wiki/{$key}";
        $frenchEditUrl = "https://wiki.openstreetmap.org/w/index.php?title=FR:{$key}&action=edit";
        
        // Fetch the HTML content of the English page using wiki_compare.py
        $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/wiki_compare.py';
        $englishHtml = null;
        $frenchHtml = null;
        $frenchCacheExists = false;
        
        if (file_exists($scriptPath)) {
            // Create a temporary Python script to fetch the page content
            $tempScriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/temp_fetch_page.py';
            $pythonCode = <<<EOT
#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import sys
import json
import hashlib
from pathlib import Path
from wiki_compare import fetch_wiki_page, HTML_CACHE_DIR

# Get the key from command line arguments
key = sys.argv[1]
language = sys.argv[2]

# Check if we're just checking cache existence
check_cache_only = len(sys.argv) > 3 and sys.argv[3] == 'check_cache'

if check_cache_only and language == 'fr':
    # For French pages, construct the URL to check cache
    if key.startswith('http'):
        url = key
    else:
        url = f"https://wiki.openstreetmap.org/wiki/FR:{key}"
    
    # Create cache key
    cache_key = hashlib.md5(url.encode()).hexdigest()
    cache_file = Path(HTML_CACHE_DIR) / f"{cache_key}.html"
    
    # Check if cache exists
    if cache_file.exists():
        print("CACHE_EXISTS")
    else:
        print("CACHE_MISSING")
else:
    # Normal fetch operation
    page = fetch_wiki_page(key, language)
    
    # Output the HTML content
    if page and 'html_content' in page:
        print(page['html_content'])
    else:
        print("")
EOT;
            
            file_put_contents($tempScriptPath, $pythonCode);
            chmod($tempScriptPath, 0755);
            
            // First check if French page exists in cache
            $command = "cd " . $this->getParameter('kernel.project_dir') . "/wiki_compare && python3 {$tempScriptPath} {$key} fr check_cache";
            $cacheCheckResult = trim(shell_exec($command));
            $frenchCacheExists = ($cacheCheckResult === "CACHE_EXISTS");
            
            // Fetch English page
            $command = "cd " . $this->getParameter('kernel.project_dir') . "/wiki_compare && python3 {$tempScriptPath} {$key} en";
            $englishHtml = shell_exec($command);
            
            // Extract only the content part from the HTML (remove headers, footers, etc.)
            if ($englishHtml) {
                $englishHtml = $this->extractMainContent($englishHtml);
            }
            
            // Fetch French page (might not exist, but we'll try)
            $command = "cd " . $this->getParameter('kernel.project_dir') . "/wiki_compare && python3 {$tempScriptPath} {$key} fr";
            $frenchHtml = shell_exec($command);
            
            // Extract only the content part from the HTML (remove headers, footers, etc.)
            if ($frenchHtml) {
                $frenchHtml = $this->extractMainContent($frenchHtml);
            }
            
            // Clean up the temporary script
            unlink($tempScriptPath);
        }

        return $this->render('admin/wiki_create_french.html.twig', [
            'key' => $key,
            'english_url' => $englishUrl,
            'french_edit_url' => $frenchEditUrl,
            'english_html' => $englishHtml,
            'french_html' => $frenchHtml,
            'french_cache_exists' => $frenchCacheExists
        ]);
    }

    #[Route('/wiki/archived-proposals', name: 'app_admin_wiki_archived_proposals')]
    public function archivedProposals(\Symfony\Component\HttpFoundation\Request $request): Response
    {
        $jsonFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/archived_proposals.json';
        $forceRefresh = $request->query->has('refresh');
        $limit = $request->query->get('limit') ? (int)$request->query->get('limit') : null;

        // Initialize arrays
        $proposals = [];
        $statistics = [];
        $lastUpdated = null;

        // Check if we should force a refresh
        if ($forceRefresh) {
            $this->refreshArchivedProposalsData($limit);
            $this->addFlash('success', 'Les données des propositions archivées ont été rafraîchies.');

            // Preserve the limit parameter in the redirect if it was provided
            if ($limit) {
                return $this->redirectToRoute('app_admin_wiki_archived_proposals', ['limit' => $limit]);
            }
            return $this->redirectToRoute('app_admin_wiki_archived_proposals');
        }

        // Check if the archived proposals file exists and load it
        if (file_exists($jsonFile)) {
            // Use memory-efficient approach to extract only the necessary data
            $maxItems = 100; // Limit the number of items to prevent memory exhaustion
            
            // Extract proposals array
            $proposals = $this->extractJsonArrayByKey($jsonFile, 'proposals', $maxItems);
            
            // Extract statistics object
            $statistics = $this->extractJsonArrayByKey($jsonFile, 'statistics', $maxItems);
            
            // Extract last_updated value
            $lastUpdated = $this->extractJsonScalarByKey($jsonFile, 'last_updated');

            // Check if the data is older than 1 day
            if ($lastUpdated) {
                $lastUpdatedTime = new \DateTime($lastUpdated);
                $now = new \DateTime();
                $diff = $now->diff($lastUpdatedTime);

                // If older than 1 day, refresh the data
                if ($diff->days > 1) {
                    $this->refreshArchivedProposalsData($limit);
                    $this->addFlash('info', 'Les données des propositions archivées ont été automatiquement mises à jour car elles dataient de plus d\'un jour.');

                    // Preserve the limit parameter in the redirect if it was provided
                    if ($limit) {
                        return $this->redirectToRoute('app_admin_wiki_archived_proposals', ['limit' => $limit]);
                    }
                    return $this->redirectToRoute('app_admin_wiki_archived_proposals');
                }
            }
        } else {
            // If the file doesn't exist, try to create it by running the script
            $this->refreshArchivedProposalsData($limit);

            // Check if the file was created
            if (file_exists($jsonFile)) {
                $this->addFlash('success', 'Le fichier des propositions archivées a été généré avec succès.');

                // Preserve the limit parameter in the redirect if it was provided
                if ($limit) {
                    return $this->redirectToRoute('app_admin_wiki_archived_proposals', ['limit' => $limit]);
                }
                return $this->redirectToRoute('app_admin_wiki_archived_proposals');
            } else {
                $this->addFlash('error', 'Impossible de générer le fichier des propositions archivées.');
            }
        }

        return $this->render('admin/wiki_archived_proposals.html.twig', [
            'proposals' => $proposals,
            'statistics' => $statistics,
            'last_updated' => $lastUpdated,
            'limit' => $limit
        ]);
    }

    /**
     * Refresh the archived proposals data by running the fetch_archived_proposals.py script
     *
     * @param int|null $limit Optional limit for the number of proposals to process
     */
    private function refreshArchivedProposalsData(?int $limit = null): void
    {
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/fetch_archived_proposals.py';
            if (file_exists($scriptPath)) {
                $command = 'python3 ' . $scriptPath;

                // Add limit parameter if provided
                if ($limit !== null) {
                    $command .= ' --limit ' . $limit;
                }

                exec($command . ' 2>&1', $output, $returnCode);

                if ($returnCode !== 0) {
                    $this->addFlash('warning', 'Impossible de mettre à jour les propositions archivées. Erreur: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script fetch_archived_proposals.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
    }

    #[Route('/wiki', name: 'app_admin_wiki')]
    public function index(): Response
    {
        $csvFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/wiki_pages.csv';

        if (!file_exists($csvFile)) {
            $this->addFlash('error', 'Le fichier wiki_pages.csv n\'existe pas.');
            return $this->redirectToRoute('app_admin_index');
        }

        $csvData = array_map('str_getcsv', file($csvFile));
        $headers = array_shift($csvData);

        $wikiPages = [];
        $missingTranslations = [];
        $pageDifferences = [];
        $pagesUnavailableInEnglish = [];

        // Collect all staleness scores for statistics
        $stalenessScores = [];
        foreach ($csvData as $row) {
            $page = array_combine($headers, $row);
            if (isset($page['staleness_score']) && is_numeric($page['staleness_score'])) {
                $stalenessScores[] = (float)$page['staleness_score'];
            }
        }

        // Calculate statistics
        $stalenessStats = [
            'count' => count($stalenessScores),
            'min' => !empty($stalenessScores) ? min($stalenessScores) : 0,
            'max' => !empty($stalenessScores) ? max($stalenessScores) : 0,
            'mean' => 0,
            'std_dev' => 0
        ];
        
        // Calculate mean
        if (!empty($stalenessScores)) {
            $stalenessStats['mean'] = array_sum($stalenessScores) / count($stalenessScores);
            
            // Calculate standard deviation
            $variance = 0;
            foreach ($stalenessScores as $score) {
                $variance += pow($score - $stalenessStats['mean'], 2);
            }
            $stalenessStats['std_dev'] = sqrt($variance / count($stalenessScores));
        }
        
        // Round statistics to 2 decimal places
        $stalenessStats['mean'] = round($stalenessStats['mean'], 2);
        $stalenessStats['std_dev'] = round($stalenessStats['std_dev'], 2);

        // Process pages - use absolute values without normalization
        foreach ($csvData as $row) {
            $page = array_combine($headers, $row);

            // Use absolute values of staleness score without normalization
            if (isset($page['staleness_score']) && is_numeric($page['staleness_score'])) {
                $page['staleness_score'] = abs((float)$page['staleness_score']);
                // Round to 2 decimal places
                $page['staleness_score'] = round($page['staleness_score'], 2);
            }

            $wikiPages[$page['key']][$page['language']] = $page;
        }

        // Identify pages missing French translations
        foreach ($wikiPages as $key => $languages) {
            if (isset($languages['en']) && !isset($languages['fr'])) {
                $missingTranslations[$key] = $languages['en'];
            }
        }


        // Prepare arrays for statistics
        $stats = [
            'en_sections' => [],
            'fr_sections' => [],
            'en_words' => [],
            'fr_words' => [],
            'en_links' => [],
            'fr_links' => [],
            'en_media' => [],
            'fr_media' => []
        ];
        
        // Calculate differences between English and French versions
        foreach ($wikiPages as $key => $languages) {
            if (isset($languages['en']) && isset($languages['fr'])) {
                $en = $languages['en'];
                $fr = $languages['fr'];

                // Calculate differences (French - English)
                $sectionDiff = (int)$fr['sections'] - (int)$en['sections'];
                $wordDiff = (int)$fr['word_count'] - (int)$en['word_count'];
                $linkDiff = (int)$fr['link_count'] - (int)$en['link_count'];
                $mediaDiff = isset($fr['media_count']) && isset($en['media_count']) ?
                    (int)$fr['media_count'] - (int)$en['media_count'] : 0;

                // Format differences with + or - sign
                $pageDifferences[$key] = [
                    'section_diff' => $sectionDiff,
                    'section_diff_formatted' => ($sectionDiff >= 0 ? '+' : '') . $sectionDiff,
                    'word_diff' => $wordDiff,
                    'word_diff_formatted' => ($wordDiff >= 0 ? '+' : '') . $wordDiff,
                    'link_diff' => $linkDiff,
                    'link_diff_formatted' => ($linkDiff >= 0 ? '+' : '') . $linkDiff,
                    'media_diff' => $mediaDiff,
                    'media_diff_formatted' => ($mediaDiff >= 0 ? '+' : '') . $mediaDiff,
                ];
                
                // Collect data for statistics
                $stats['en_sections'][] = (int)$en['sections'];
                $stats['fr_sections'][] = (int)$fr['sections'];
                $stats['en_words'][] = (int)$en['word_count'];
                $stats['fr_words'][] = (int)$fr['word_count'];
                $stats['en_links'][] = (int)$en['link_count'];
                $stats['fr_links'][] = (int)$fr['link_count'];
                $stats['en_media'][] = isset($en['media_count']) ? (int)$en['media_count'] : 0;
                $stats['fr_media'][] = isset($fr['media_count']) ? (int)$fr['media_count'] : 0;
            }
        }
        
        // Calculate statistics
        $wikiPagesStats = [];
        foreach ($stats as $key => $values) {
            if (!empty($values)) {
                $mean = array_sum($values) / count($values);
                
                // Calculate standard deviation
                $variance = 0;
                foreach ($values as $value) {
                    $variance += pow($value - $mean, 2);
                }
                $stdDev = sqrt($variance / count($values));
                
                $wikiPagesStats[$key] = [
                    'count' => count($values),
                    'min' => min($values),
                    'max' => max($values),
                    'mean' => round($mean, 2),
                    'std_dev' => round($stdDev, 2)
                ];
            }
        }

        // Sort wiki pages by staleness score (descending)
        uasort($wikiPages, function ($a, $b) {
            $scoreA = isset($a['en']) && isset($a['fr']) && isset($a['en']['staleness_score']) ? (float)$a['en']['staleness_score'] : 0;
            $scoreB = isset($b['en']) && isset($b['fr']) && isset($b['en']['staleness_score']) ? (float)$b['en']['staleness_score'] : 0;
            return $scoreB <=> $scoreA;
        });

        // Load pages unavailable in English
        $pagesUnavailableInEnglishFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/pages_unavailable_in_english.json';
        if (file_exists($pagesUnavailableInEnglishFile)) {
            $pagesUnavailableInEnglishData = json_decode(file_get_contents($pagesUnavailableInEnglishFile), true);
            if (isset($pagesUnavailableInEnglishData['pages']) && is_array($pagesUnavailableInEnglishData['pages'])) {
                // Deduplicate pages based on URL
                $uniquePages = [];
                $seenUrls = [];
                
                foreach ($pagesUnavailableInEnglishData['pages'] as $page) {
                    if (isset($page['url'])) {
                        // Use URL as the key for deduplication
                        $url = $page['url'];
                        if (!isset($seenUrls[$url])) {
                            $seenUrls[$url] = true;
                            $uniquePages[] = $page;
                        }
                    } else {
                        // If no URL, keep the page (shouldn't happen, but just in case)
                        $uniquePages[] = $page;
                    }
                }
                
                $pagesUnavailableInEnglish = $uniquePages;
            }
        }

        // Load specific pages from outdated_pages.json
        $specificPages = [];
        $outdatedPagesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/outdated_pages.json';
        if (file_exists($outdatedPagesFile)) {
            // Use a memory-efficient approach to extract only the specific_pages array
            // without loading the entire file into memory
            $maxPages = 100; // Limit the number of pages to prevent memory exhaustion
            $specificPages = $this->extractSpecificPagesFromJson($outdatedPagesFile, $maxPages);
        }

        // Load newly created French pages
        $newlyCreatedPages = [];
        $newlyCreatedPagesFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/newly_created_french_pages.json';
        if (file_exists($newlyCreatedPagesFile)) {
            $newlyCreatedPagesData = json_decode(file_get_contents($newlyCreatedPagesFile), true);
            if (isset($newlyCreatedPagesData['created_pages']) && is_array($newlyCreatedPagesData['created_pages'])) {
                $newlyCreatedPages = $newlyCreatedPagesData['created_pages'];
            }
        }

        // Load machine translations
        $availableTranslations = [];
        $translationsFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/translations.json';
        if (file_exists($translationsFile)) {
            $translationsData = json_decode(file_get_contents($translationsFile), true);
            if (isset($translationsData['translations']) && is_array($translationsData['translations'])) {
                $availableTranslations = $translationsData['translations'];
            }
        }
        
        // Load keys without wiki pages
        $keysWithoutWiki = [];
        $keysWithoutWikiFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/keys_without_wiki.json';
        if (file_exists($keysWithoutWikiFile)) {
            $keysWithoutWikiData = json_decode(file_get_contents($keysWithoutWikiFile), true);
            if (is_array($keysWithoutWikiData)) {
                $keysWithoutWiki = $keysWithoutWikiData;
            }
        }

        return $this->render('admin/wiki.html.twig', [
            'wiki_pages' => $wikiPages,
            'missing_translations' => $missingTranslations,
            'page_differences' => $pageDifferences,
            'pages_unavailable_in_english' => $pagesUnavailableInEnglish,
            'specific_pages' => $specificPages,
            'newly_created_pages' => $newlyCreatedPages,
            'staleness_stats' => $stalenessStats,
            'wiki_pages_stats' => $wikiPagesStats,
            'available_translations' => $availableTranslations,
            'keys_without_wiki' => $keysWithoutWiki
        ]);
    }

    #[Route('/wiki/translate/{key}', name: 'app_admin_wiki_translate', requirements: ['key' => '.+'])]
    public function translate(string $key): Response
    {
        $this->addFlash('info', 'Traduction en cours pour la page ' . $key);
        
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/wiki_translate.py';
            
            if (file_exists($scriptPath)) {
                // Execute the translation script with virtual environment
                $venvPython = $this->getParameter('kernel.project_dir') . '/venv/bin/python';
                $command = 'cd ' . $this->getParameter('kernel.project_dir') . ' && ' . $venvPython . ' ' . $scriptPath . ' "' . $key . '"';
                $output = [];
                $returnVar = 0;
                exec($command, $output, $returnVar);
                
                if ($returnVar === 0) {
                    $this->addFlash('success', 'Traduction réussie pour la page ' . $key);
                } else {
                    $this->addFlash('warning', 'Problème lors de la traduction: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script wiki_translate.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
        
        return $this->redirectToRoute('app_admin_wiki');
    }
    
    #[Route('/wiki/update-translation/{key}', name: 'app_admin_wiki_update_translation', requirements: ['key' => '.+'])]
    public function updateTranslation(string $key): Response
    {
        $this->addFlash('info', 'Mise à jour de la traduction en cours pour la page ' . $key);
        
        try {
            $scriptPath = $this->getParameter('kernel.project_dir') . '/wiki_compare/wiki_translate.py';
            
            if (file_exists($scriptPath)) {
                // Execute the translation script with the update flag and virtual environment
                $venvPython = $this->getParameter('kernel.project_dir') . '/venv/bin/python';
                $command = 'cd ' . $this->getParameter('kernel.project_dir') . ' && ' . $venvPython . ' ' . $scriptPath . ' "' . $key . '"';
                $output = [];
                $returnVar = 0;
                exec($command, $output, $returnVar);
                
                if ($returnVar === 0) {
                    $this->addFlash('success', 'Mise à jour de la traduction réussie pour la page ' . $key);
                } else {
                    $this->addFlash('warning', 'Problème lors de la mise à jour de la traduction: ' . implode("\n", $output));
                }
            } else {
                $this->addFlash('error', 'Le script wiki_translate.py n\'existe pas.');
            }
        } catch (\Exception $e) {
            $this->addFlash('error', 'Erreur lors de l\'exécution du script: ' . $e->getMessage());
        }
        
        return $this->redirectToRoute('app_admin_wiki');
    }

    #[Route('/wiki/compare/{key}', name: 'app_admin_wiki_compare', requirements: ['key' => '.+'])]
    public function compare(string $key): Response
    {
        $csvFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/wiki_pages.csv';
        $jsonFile = $this->getParameter('kernel.project_dir') . '/wiki_compare/outdated_pages.json';

        if (!file_exists($csvFile)) {
            $this->addFlash('error', 'Le fichier wiki_pages.csv n\'existe pas.');
            return $this->redirectToRoute('app_admin_index');
        }

        $csvData = array_map('str_getcsv', file($csvFile));
        $headers = array_shift($csvData);

        // Process CSV data to find the requested key
        $enPage = null;
        $frPage = null;

        foreach ($csvData as $row) {
            $page = array_combine($headers, $row);
            if ($page['key'] === $key) {
                if ($page['language'] === 'en') {
                    $enPage = $page;
                } elseif ($page['language'] === 'fr') {
                    $frPage = $page;
                }
            }
        }

        // If English page doesn't exist, redirect back with error
        if (!$enPage) {
            $this->addFlash('error', 'La page wiki pour la clé "' . $key . '" n\'existe pas.');
            return $this->redirectToRoute('app_admin_wiki');
        }

        // Get detailed content comparison from JSON file
        $detailedComparison = null;
        $mediaDiff = 0;
        $historyData = null;
        $prevPage = null;
        $nextPage = null;
        $stalenessDistribution = null;

        if (file_exists($jsonFile)) {
            // Use memory-efficient approach to extract only the necessary data
            $maxItems = 100; // Limit the number of items to prevent memory exhaustion
            
            // Extract history data if available
            $historyData = [];
            
            // Get history data from the JSON file
            $historyEntries = $this->extractJsonArrayByKey($jsonFile, 'history', $maxItems);
            
            // Process history data for the current key
            foreach ($historyEntries as $timestamp => $entry) {
                $historyEntry = [
                    'timestamp' => $timestamp,
                    'date' => is_string($timestamp) && !empty($timestamp) && $timestamp !== '0' ? 
                        (new \DateTime($timestamp))->format('Y-m-d') : 'N/A',
                    'metrics' => []
                ];
                
                // Check regular_pages
                if (isset($entry['regular_pages']) && is_array($entry['regular_pages'])) {
                    foreach ($entry['regular_pages'] as $page) {
                        if (isset($page['key']) && $page['key'] === $key) {
                            // Extract metrics
                            $historyEntry['metrics'] = [
                                'staleness_score' => $page['staleness_score'] ?? 0,
                                'date_diff' => $page['date_diff'] ?? 0,
                                'word_diff' => $page['word_diff'] ?? 0,
                                'section_diff' => $page['section_diff'] ?? 0,
                                'link_diff' => $page['link_diff'] ?? 0,
                                'media_diff' => $page['media_diff'] ?? 0
                            ];
                            $historyData[] = $historyEntry;
                            break;
                        }
                    }
                }
                
                // If not found in regular_pages, check specific_pages
                if (empty($historyEntry['metrics']) && isset($entry['specific_pages']) && is_array($entry['specific_pages'])) {
                    foreach ($entry['specific_pages'] as $page) {
                        if (isset($page['key']) && $page['key'] === $key) {
                            // Extract metrics
                            $historyEntry['metrics'] = [
                                'staleness_score' => $page['staleness_score'] ?? 0,
                                'date_diff' => $page['date_diff'] ?? 0,
                                'word_diff' => $page['word_diff'] ?? 0,
                                'section_diff' => $page['section_diff'] ?? 0,
                                'link_diff' => $page['link_diff'] ?? 0,
                                'media_diff' => $page['media_diff'] ?? 0
                            ];
                            $historyData[] = $historyEntry;
                            break;
                        }
                    }
                }
            }
            
            // Sort history data by timestamp
            usort($historyData, function($a, $b) {
                return strtotime($a['timestamp']) - strtotime($b['timestamp']);
            });

            // Get regular_pages and specific_pages arrays
            $regularPages = $this->extractJsonArrayByKey($jsonFile, 'regular_pages', $maxItems);
            $specificPages = $this->extractJsonArrayByKey($jsonFile, 'specific_pages', $maxItems);
            
            // Combine them into a single array
            $allPages = array_merge($regularPages, $specificPages);
            
            // Sort pages by staleness score (descending)
            usort($allPages, function($a, $b) {
                $scoreA = $a['staleness_score'] ?? 0;
                $scoreB = $b['staleness_score'] ?? 0;
                return $scoreB <=> $scoreA; // Descending order
            });
            
            // Find the current page index in the sorted array
            $currentIndex = -1;
            foreach ($allPages as $index => $page) {
                if (isset($page['key']) && $page['key'] === $key) {
                    $currentIndex = $index;
                    break;
                }
            }
            
            // Determine previous and next pages
            if ($currentIndex > 0) {
                $prevPage = $allPages[$currentIndex - 1];
            }
            
            if ($currentIndex < count($allPages) - 1 && $currentIndex >= 0) {
                $nextPage = $allPages[$currentIndex + 1];
            }
            
            // Create staleness score distribution data for histogram
            $stalenessScores = [];
            foreach ($allPages as $page) {
                if (isset($page['staleness_score'])) {
                    $stalenessScores[] = $page['staleness_score'];
                }
            }
            
            if (!empty($stalenessScores)) {
                // Calculate statistics
                $min = min($stalenessScores);
                $max = max($stalenessScores);
                $avg = array_sum($stalenessScores) / count($stalenessScores);
                $median = $this->calculateMedian($stalenessScores);
                
                // Create histogram bins (10 bins)
                $binCount = 10;
                $binSize = ($max - $min) / $binCount;
                $bins = [];
                $binLabels = [];
                
                // Initialize bins
                for ($i = 0; $i < $binCount; $i++) {
                    $bins[$i] = 0;
                    $binStart = $min + ($i * $binSize);
                    $binEnd = $binStart + $binSize;
                    $binLabels[$i] = round($binStart, 1) . ' - ' . round($binEnd, 1);
                }
                
                // Count scores in each bin
                foreach ($stalenessScores as $score) {
                    $binIndex = min($binCount - 1, floor(($score - $min) / $binSize));
                    $bins[$binIndex]++;
                }
                
                // Find which bin the current page falls into
                $currentPageScore = 0;
                foreach ($allPages as $page) {
                    if (isset($page['key']) && $page['key'] === $key && isset($page['staleness_score'])) {
                        $currentPageScore = $page['staleness_score'];
                        break;
                    }
                }
                
                $currentPageBin = min($binCount - 1, floor(($currentPageScore - $min) / $binSize));
                
                $stalenessDistribution = [
                    'scores' => $stalenessScores,
                    'min' => $min,
                    'max' => $max,
                    'avg' => $avg,
                    'median' => $median,
                    'bins' => $bins,
                    'binLabels' => $binLabels,
                    'currentPageScore' => $currentPageScore,
                    'currentPageBin' => $currentPageBin,
                    'totalPages' => count($stalenessScores)
                ];
            }

            // Find the page with the matching key
            foreach ($allPages as $page) {
                if (isset($page['key']) && $page['key'] === $key) {
                    $mediaComparison = $page['media_comparison'] ?? null;

                    // Deduplicate images by URL in the controller and filter out images that appear in both languages
                    if ($mediaComparison) {
                        // Get all image URLs from both languages
                        $enOnlyImages = $mediaComparison['en_only'] ?? [];
                        $frOnlyImages = $mediaComparison['fr_only'] ?? [];
                        $commonImages = $mediaComparison['common'] ?? [];

                        // Extract all URLs from French images
                        $frImageUrls = [];
                        foreach ($frOnlyImages as $media) {
                            $frImageUrls[] = $media['src'];
                        }

                        // Also add URLs from common images (French side)
                        foreach ($commonImages as $commonMedia) {
                            if (isset($commonMedia['fr']['src'])) {
                                $frImageUrls[] = $commonMedia['fr']['src'];
                            }
                        }

                        // Extract all URLs from English images
                        $enImageUrls = [];
                        foreach ($enOnlyImages as $media) {
                            $enImageUrls[] = $media['src'];
                        }

                        // Also add URLs from common images (English side)
                        foreach ($commonImages as $commonMedia) {
                            if (isset($commonMedia['en']['src'])) {
                                $enImageUrls[] = $commonMedia['en']['src'];
                            }
                        }

                        // Process English-only images - deduplicate and filter out those that appear in French
                        $enUniqueImages = [];
                        $enProcessedUrls = [];

                        foreach ($enOnlyImages as $media) {
                            // Skip if this URL is already processed or if it appears in French images
                            if (!in_array($media['src'], $enProcessedUrls) && !in_array($media['src'], $frImageUrls)) {
                                $enProcessedUrls[] = $media['src'];
                                $enUniqueImages[] = $media;
                            }
                        }

                        // Process French-only images - deduplicate and filter out those that appear in English
                        $frUniqueImages = [];
                        $frProcessedUrls = [];

                        foreach ($frOnlyImages as $media) {
                            // Skip if this URL is already processed or if it appears in English images
                            if (!in_array($media['src'], $frProcessedUrls) && !in_array($media['src'], $enImageUrls)) {
                                $frProcessedUrls[] = $media['src'];
                                $frUniqueImages[] = $media;
                            }
                        }

                        // Replace the arrays with deduplicated and filtered versions
                        $mediaComparison['en_only'] = $enUniqueImages;
                        $mediaComparison['fr_only'] = $frUniqueImages;
                        $mediaComparison['en_only_count'] = count($enOnlyImages);
                        $mediaComparison['fr_only_count'] = count($frOnlyImages);
                    }

                    // Get link comparison data
                    $linkComparison = $page['link_comparison'] ?? null;

                    // Sort links alphabetically by URL if link comparison exists
                    if ($linkComparison) {
                        // Sort English-only links
                        if (isset($linkComparison['en_only']) && is_array($linkComparison['en_only'])) {
                            usort($linkComparison['en_only'], function ($a, $b) {
                                return strcmp($a['href'], $b['href']);
                            });
                        }

                        // Sort French-only links
                        if (isset($linkComparison['fr_only']) && is_array($linkComparison['fr_only'])) {
                            usort($linkComparison['fr_only'], function ($a, $b) {
                                return strcmp($a['href'], $b['href']);
                            });
                        }

                        // Sort common links
                        if (isset($linkComparison['common']) && is_array($linkComparison['common'])) {
                            usort($linkComparison['common'], function ($a, $b) {
                                return strcmp($a['en']['href'], $b['en']['href']);
                            });
                        }
                    }

                    // Get section comparison data and filter out "Contents" sections and navigation sections
                    $sectionComparison = $page['section_comparison'] ?? null;

                    // Sections to exclude from comparison (navigation elements)
                    $excludedSections = [
                        'Contents', 'Sommaire',
                        'Personal tools', 'Namespaces', 'Views', 'Search', 'Site', 'Tools', 'In other projects'
                    ];

                    // Filter out excluded sections if section comparison exists
                    if ($sectionComparison) {
                        // Filter common sections
                        if (isset($sectionComparison['common']) && is_array($sectionComparison['common'])) {
                            $sectionComparison['common'] = array_filter($sectionComparison['common'], function ($section) use ($excludedSections) {
                                // Skip if either English or French title is in the excluded list
                                return !(in_array($section['en']['title'], $excludedSections) || in_array($section['fr']['title'], $excludedSections));
                            });
                            // Re-index array
                            $sectionComparison['common'] = array_values($sectionComparison['common']);
                        }

                        // Filter English-only sections
                        if (isset($sectionComparison['en_only']) && is_array($sectionComparison['en_only'])) {
                            $sectionComparison['en_only'] = array_filter($sectionComparison['en_only'], function ($section) use ($excludedSections) {
                                return !in_array($section['title'], $excludedSections);
                            });
                            // Re-index array
                            $sectionComparison['en_only'] = array_values($sectionComparison['en_only']);
                        }

                        // Filter French-only sections
                        if (isset($sectionComparison['fr_only']) && is_array($sectionComparison['fr_only'])) {
                            $sectionComparison['fr_only'] = array_filter($sectionComparison['fr_only'], function ($section) use ($excludedSections) {
                                return !in_array($section['title'], $excludedSections);
                            });
                            // Re-index array
                            $sectionComparison['fr_only'] = array_values($sectionComparison['fr_only']);
                        }
                    }

                    // Calculate adjusted section counts (excluding "Contents" sections)
                    $enSectionCount = $enPage['sections'];
                    $frSectionCount = $frPage['sections'];

                    // Adjust section counts if we have section comparison data
                    if ($sectionComparison) {
                        // Count how many sections were filtered out
                        $filteredCount = 0;

                        // Check common sections that were filtered
                        if (isset($page['section_comparison']['common']) && is_array($page['section_comparison']['common'])) {
                            foreach ($page['section_comparison']['common'] as $section) {
                                if (in_array($section['en']['title'], $excludedSections) || in_array($section['fr']['title'], $excludedSections)) {
                                    $filteredCount++;
                                }
                            }
                        }

                        // Check English-only sections that were filtered
                        if (isset($page['section_comparison']['en_only']) && is_array($page['section_comparison']['en_only'])) {
                            foreach ($page['section_comparison']['en_only'] as $section) {
                                if (in_array($section['title'], $excludedSections)) {
                                    $filteredCount++;
                                }
                            }
                        }

                        // Check French-only sections that were filtered
                        if (isset($page['section_comparison']['fr_only']) && is_array($page['section_comparison']['fr_only'])) {
                            foreach ($page['section_comparison']['fr_only'] as $section) {
                                if (in_array($section['title'], $excludedSections)) {
                                    $filteredCount++;
                                }
                            }
                        }

                        // Adjust section counts
                        $enSectionCount -= $filteredCount;
                        $frSectionCount -= $filteredCount;
                    }

                    // Check for incorrect heading hierarchies
                    $enHierarchyErrors = [];
                    $frHierarchyErrors = [];

                    // Check English sections
                    if (isset($sectionComparison['en_only']) && is_array($sectionComparison['en_only'])) {
                        $enHierarchyErrors = $this->detectHeadingHierarchyErrors($sectionComparison['en_only']);
                    }

                    // Also check common sections (English side)
                    if (isset($sectionComparison['common']) && is_array($sectionComparison['common'])) {
                        $commonEnSections = array_map(function ($section) {
                            return $section['en'];
                        }, $sectionComparison['common']);

                        $enHierarchyErrors = array_merge($enHierarchyErrors, $this->detectHeadingHierarchyErrors($commonEnSections));
                    }

                    // Check French sections
                    if (isset($sectionComparison['fr_only']) && is_array($sectionComparison['fr_only'])) {
                        $frHierarchyErrors = $this->detectHeadingHierarchyErrors($sectionComparison['fr_only']);
                    }

                    // Also check common sections (French side)
                    if (isset($sectionComparison['common']) && is_array($sectionComparison['common'])) {
                        $commonFrSections = array_map(function ($section) {
                            return $section['fr'];
                        }, $sectionComparison['common']);

                        $frHierarchyErrors = array_merge($frHierarchyErrors, $this->detectHeadingHierarchyErrors($commonFrSections));
                    }

                    // Build aligned section list for better visualization of missing sections
                    $alignedSections = $this->buildAlignedSectionList($sectionComparison);

                    $detailedComparison = [
                        'section_comparison' => $sectionComparison,
                        'aligned_sections' => $alignedSections,
                        'link_comparison' => $linkComparison,
                        'media_comparison' => $mediaComparison,
                        'category_comparison' => $page['category_comparison'] ?? null,
                        'grammar_suggestions' => $page['grammar_suggestions'] ?? null,
                        'adjusted_en_section_count' => $enSectionCount,
                        'adjusted_fr_section_count' => $frSectionCount,
                        'en_hierarchy_errors' => $enHierarchyErrors,
                        'fr_hierarchy_errors' => $frHierarchyErrors
                    ];

                    $mediaDiff = $page['media_diff'] ?? 0;
                    break;
                }
            }
        }

        // Calculate staleness score components
        $scoreComponents = [];

        if ($frPage) {
            // Calculate date difference in days
            $dateDiff = 0;
            if ($enPage['last_modified'] && $frPage['last_modified']) {
                $enDate = \DateTime::createFromFormat('Y-m-d', $enPage['last_modified']);
                $frDate = \DateTime::createFromFormat('Y-m-d', $frPage['last_modified']);
                if ($enDate && $frDate) {
                    $dateDiff = ($enDate->getTimestamp() - $frDate->getTimestamp()) / (60 * 60 * 24);
                }
            }

            // Calculate content differences
            $wordDiff = $enPage['word_count'] - $frPage['word_count'];
            $sectionDiff = $enPage['sections'] - $frPage['sections'];
            $linkDiff = $enPage['link_count'] - $frPage['link_count'];

            // Calculate score components
            $dateComponent = abs($dateDiff) * 0.2;
            $wordComponent = (abs($wordDiff) / 100) * 0.5;
            $sectionComponent = abs($sectionDiff) * 0.15;
            $linkComponent = (abs($linkDiff) / 10) * 0.15;

            $scoreComponents = [
                'date' => [
                    'value' => $dateDiff,
                    'weight' => 0.2,
                    'component' => $dateComponent,
                    'description' => 'Différence de date (en jours)'
                ],
                'word' => [
                    'value' => $wordDiff,
                    'weight' => 0.5,
                    'component' => $wordComponent,
                    'description' => 'Différence de nombre de mots'
                ],
                'section' => [
                    'value' => $sectionDiff,
                    'weight' => 0.15,
                    'component' => $sectionComponent,
                    'description' => 'Différence de nombre de sections'
                ],
                'link' => [
                    'value' => $linkDiff,
                    'weight' => 0.15,
                    'component' => $linkComponent,
                    'description' => 'Différence de nombre de liens'
                ]
            ];

            // Add media component if available
            if (isset($enPage['media_count']) && isset($frPage['media_count'])) {
                $mediaComponent = (abs($mediaDiff) / 5) * 0.1;
                $scoreComponents['media'] = [
                    'value' => $mediaDiff,
                    'weight' => 0.1,
                    'component' => $mediaComponent,
                    'description' => 'Différence de nombre d\'images'
                ];

                // Adjust other weights to maintain total of 1.0
                $scoreComponents['date']['weight'] = 0.2;
                $scoreComponents['word']['weight'] = 0.45;
                $scoreComponents['section']['weight'] = 0.15;
                $scoreComponents['link']['weight'] = 0.1;
            }
        }

        // Create URL for new French page if it doesn't exist
        $createFrUrl = null;
        if (!$frPage) {
            $createFrUrl = 'https://wiki.openstreetmap.org/wiki/FR:' . $key;
        }

        // Format section titles for copy functionality
        $enSections = '';
        $frSections = '';

        if ($detailedComparison && $detailedComparison['section_comparison']) {
            // English sections
            if ($enPage) {
                $enSectionsList = [];

                // Add common sections
                foreach ($detailedComparison['section_comparison']['common'] as $section) {
                    $enSectionsList[] = str_repeat('=', $section['en']['level']) . ' ' .
                        $section['en']['title'] . ' ' .
                        str_repeat('=', $section['en']['level']);
                }

                // Add English-only sections
                foreach ($detailedComparison['section_comparison']['en_only'] as $section) {
                    $enSectionsList[] = str_repeat('=', $section['level']) . ' ' .
                        $section['title'] . ' ' .
                        str_repeat('=', $section['level']) . ' (EN only)';
                }

                $enSections = implode("\n", $enSectionsList);
            }

            // French sections
            if ($frPage) {
                $frSectionsList = [];

                // Add common sections
                foreach ($detailedComparison['section_comparison']['common'] as $section) {
                    $frSectionsList[] = str_repeat('=', $section['fr']['level']) . ' ' .
                        $section['fr']['title'] . ' ' .
                        str_repeat('=', $section['fr']['level']);
                }

                // Add French-only sections
                foreach ($detailedComparison['section_comparison']['fr_only'] as $section) {
                    $frSectionsList[] = str_repeat('=', $section['level']) . ' ' .
                        $section['title'] . ' ' .
                        str_repeat('=', $section['level']) . ' (FR only)';
                }

                $frSections = implode("\n", $frSectionsList);
            }
        }

        // Format links for copy functionality
        $enLinks = '';
        $frLinks = '';

        if ($detailedComparison && $detailedComparison['link_comparison']) {
            // English links
            if ($enPage) {
                $enLinksList = [];

                // Add common links
                foreach ($detailedComparison['link_comparison']['common'] as $link) {
                    $enLinksList[] = $link['en']['text'] . ' - ' . $link['en']['href'];
                }

                // Add English-only links
                foreach ($detailedComparison['link_comparison']['en_only'] as $link) {
                    $enLinksList[] = $link['text'] . ' - ' . $link['href'] . ' (EN only)';
                }

                $enLinks = implode("\n", $enLinksList);
            }

            // French links
            if ($frPage) {
                $frLinksList = [];

                // Add common links
                foreach ($detailedComparison['link_comparison']['common'] as $link) {
                    $frLinksList[] = $link['fr']['text'] . ' - ' . $link['fr']['href'];
                }

                // Add French-only links
                foreach ($detailedComparison['link_comparison']['fr_only'] as $link) {
                    $frLinksList[] = $link['text'] . ' - ' . $link['href'] . ' (FR only)';
                }

                $frLinks = implode("\n", $frLinksList);
            }
        }

        // Ensure page URLs are strings to prevent array to string conversion errors
        if ($frPage && isset($frPage['url']) && is_array($frPage['url'])) {
            $frPage['url'] = json_encode($frPage['url']);
        }

        if ($enPage && isset($enPage['url']) && is_array($enPage['url'])) {
            $enPage['url'] = json_encode($enPage['url']);
        }

        return $this->render('admin/wiki_compare.html.twig', [
            'key' => $key,
            'en_page' => $enPage,
            'fr_page' => $frPage,
            'score_components' => $scoreComponents,
            'create_fr_url' => $createFrUrl,
            'detailed_comparison' => $detailedComparison,
            'en_sections' => $enSections,
            'fr_sections' => $frSections,
            'en_links' => $enLinks,
            'fr_links' => $frLinks,
            'history_data' => $historyData,
            'prev_page' => $prevPage,
            'next_page' => $nextPage,
            'staleness_distribution' => $stalenessDistribution
        ]);
    }
    
    /**
     * Extracts the main content from the HTML, removing headers, footers, and other unnecessary elements
     * 
     * @param string $html The full HTML content
     * @return string The extracted main content
     */
    private function extractMainContent(string $html): string
    {
        // Use a simple approach to extract the content
        // This could be improved with a more sophisticated HTML parser if needed
        
        // Create a DOMDocument to parse the HTML
        $dom = new \DOMDocument();
        
        // Suppress warnings about malformed HTML
        libxml_use_internal_errors(true);
        $dom->loadHTML($html);
        libxml_clear_errors();
        
        // Try to find the main content element
        $contentElement = null;
        
        // First, try to find the element with id "mw-content-text"
        $contentElement = $dom->getElementById('mw-content-text');
        
        // If not found, try to find the element with class "mw-content-ltr"
        if (!$contentElement) {
            $xpath = new \DOMXPath($dom);
            $elements = $xpath->query("//*[contains(@class, 'mw-content-ltr')]");
            if ($elements->length > 0) {
                $contentElement = $elements->item(0);
            }
        }
        
        // If still not found, return the original HTML
        if (!$contentElement) {
            return $html;
        }
        
        // Get the HTML of the content element
        $contentHtml = $dom->saveHTML($contentElement);
        
        // Clean up the content HTML
        // Remove script and style elements
        $contentHtml = preg_replace('/<script\b[^>]*>(.*?)<\/script>/is', '', $contentHtml);
        $contentHtml = preg_replace('/<style\b[^>]*>(.*?)<\/style>/is', '', $contentHtml);
        
        // Remove edit section links
        $contentHtml = preg_replace('/<span class="mw-editsection">(.*?)<\/span>/is', '', $contentHtml);
        
        return $contentHtml;
    }
    
    /**
     * Extracts an array from a large JSON file by key without loading the entire file into memory
     * 
     * @param string $filePath Path to the JSON file
     * @param string $key The key of the array to extract
     * @param int $maxItems Maximum number of items to extract (to prevent memory exhaustion)
     * @return array The extracted array
     */
    private function extractJsonArrayByKey(string $filePath, string $key, int $maxItems = 100): array
    {
        $result = [];
        
        // First, check if the file exists and is readable
        if (!is_readable($filePath)) {
            error_log("File is not readable: $filePath");
            return $result;
        }
        
        // Get the file size
        $fileSize = filesize($filePath);
        if ($fileSize === false || $fileSize === 0) {
            error_log("File is empty or size could not be determined: $filePath");
            return $result;
        }
        
        try {
            // For very large files, we'll use a more efficient approach
            // We'll search for the specified key directly
            $handle = fopen($filePath, 'r');
            if (!$handle) {
                error_log("Could not open file: $filePath");
                return $result;
            }
            
            // Variables to track parsing state
            $bracketCount = 0;
            $buffer = '';
            $itemCount = 0;
            $inArray = false;
            $arrayStarted = false;
            
            // Skip ahead to find the specified key more quickly
            $found = false;
            $searchKey = '"' . $key . '"';
            
            while (!$found && ($line = fgets($handle)) !== false) {
                if (strpos($line, $searchKey) !== false) {
                    $found = true;
                    
                    // Extract everything after the key
                    $keyPos = strpos($line, $searchKey);
                    $afterKey = substr($line, $keyPos + strlen($searchKey));
                    
                    // Find the colon and then the opening bracket
                    if (strpos($afterKey, ':') !== false && strpos($afterKey, '[') !== false) {
                        $inArray = true;
                        $arrayStarted = true;
                        $bracketPos = strpos($afterKey, '[');
                        $buffer = '['; // Start the buffer with an opening bracket
                        $bracketCount = 1;
                        
                        // Add everything after the opening bracket to the buffer
                        $buffer .= substr($afterKey, $bracketPos + 1);
                    } else if (strpos($afterKey, ':') !== false) {
                        // The opening bracket might be on the next line
                        $inArray = true;
                    }
                    
                    break;
                }
            }
            
            // If we didn't find the key, return empty array
            if (!$found) {
                fclose($handle);
                error_log("Key '$key' not found in file: $filePath");
                return $result;
            }
            
            // If we found the key but not the opening bracket yet, look for it
            if ($inArray && !$arrayStarted) {
                while (($line = fgets($handle)) !== false) {
                    if (strpos($line, '[') !== false) {
                        $bracketPos = strpos($line, '[');
                        $buffer = '['; // Start the buffer with an opening bracket
                        $bracketCount = 1;
                        $arrayStarted = true;
                        
                        // Add everything after the opening bracket to the buffer
                        $buffer .= substr($line, $bracketPos + 1);
                        break;
                    }
                }
            }
            
            // If we still haven't found the opening bracket, something is wrong
            if (!$arrayStarted) {
                fclose($handle);
                error_log("Could not find opening bracket for array '$key' in file: $filePath");
                return $result;
            }
            
            // Now process the array
            $collectingItems = true;
            while ($collectingItems && ($line = fgets($handle)) !== false) {
                // Count opening and closing brackets to track array nesting
                $openBrackets = substr_count($line, '[') + substr_count($line, '{');
                $closeBrackets = substr_count($line, ']') + substr_count($line, '}');
                $bracketCount += $openBrackets - $closeBrackets;
                
                // Add the line to our buffer
                $buffer .= $line;
                
                // If we've reached the end of the array (bracketCount = 0)
                if ($bracketCount === 0) {
                    $collectingItems = false;
                    
                    // Try to parse the buffer as JSON
                    try {
                        $parsedData = json_decode($buffer, true);
                        if (json_last_error() !== JSON_ERROR_NONE) {
                            error_log("JSON parse error: " . json_last_error_msg() . " for key '$key'");
                            
                            // Try a different approach - manually construct a valid JSON array
                            // Split the buffer by objects (each starting with { and ending with })
                            preg_match_all('/\{[^{}]*(?:\{[^{}]*\}[^{}]*)*\}/s', $buffer, $matches);
                            
                            if (!empty($matches[0])) {
                                // Take the first $maxItems objects
                                $objects = array_slice($matches[0], 0, $maxItems);
                                
                                // Construct a valid JSON array
                                $validJson = '[' . implode(',', $objects) . ']';
                                
                                // Try to parse the valid JSON
                                $parsedData = json_decode($validJson, true);
                                if (json_last_error() === JSON_ERROR_NONE && is_array($parsedData)) {
                                    $result = $parsedData;
                                } else {
                                    error_log("Alternative JSON parsing approach also failed: " . json_last_error_msg() . " for key '$key'");
                                }
                            }
                        } else if (is_array($parsedData)) {
                            // Limit the number of items to prevent memory exhaustion
                            $result = array_slice($parsedData, 0, $maxItems);
                        }
                    } catch (\Exception $e) {
                        error_log("Exception parsing JSON for key '$key': " . $e->getMessage());
                    }
                    
                    break;
                }
                
                // Check if we've found a complete item (when we see a closing brace followed by a comma)
                // This is used to count items and limit the number of items processed
                if (preg_match('/\}\s*,\s*$/m', $line)) {
                    $itemCount++;
                    
                    // If we've reached the maximum number of items, stop processing
                    if ($itemCount >= $maxItems) {
                        $collectingItems = false;
                        
                        // Create a valid JSON array with the items we've collected so far
                        // We need to ensure the buffer ends with a complete JSON object and a closing bracket
                        
                        // First, find the last complete object (ending with })
                        $lastObjectEnd = strrpos($buffer, '}');
                        if ($lastObjectEnd !== false) {
                            // Truncate the buffer at the end of the last complete object
                            $buffer = substr($buffer, 0, $lastObjectEnd + 1);
                            // Add the closing bracket for the array
                            $buffer .= ']';
                            
                            // Try to parse the buffer as JSON
                            try {
                                $parsedData = json_decode($buffer, true);
                                if (json_last_error() !== JSON_ERROR_NONE) {
                                    error_log("JSON parse error after max items: " . json_last_error_msg() . " for key '$key'");
                                    
                                    // Try a different approach - manually construct a valid JSON array
                                    // Split the buffer by objects (each starting with { and ending with })
                                    preg_match_all('/\{[^{}]*(?:\{[^{}]*\}[^{}]*)*\}/s', $buffer, $matches);
                                    
                                    if (!empty($matches[0])) {
                                        // Take the first $maxItems objects
                                        $objects = array_slice($matches[0], 0, $maxItems);
                                        
                                        // Construct a valid JSON array
                                        $validJson = '[' . implode(',', $objects) . ']';
                                        
                                        // Try to parse the valid JSON
                                        $parsedData = json_decode($validJson, true);
                                        if (json_last_error() === JSON_ERROR_NONE && is_array($parsedData)) {
                                            $result = $parsedData;
                                        } else {
                                            error_log("Alternative JSON parsing approach also failed: " . json_last_error_msg() . " for key '$key'");
                                        }
                                    }
                                } else if (is_array($parsedData)) {
                                    $result = $parsedData;
                                }
                            } catch (\Exception $e) {
                                error_log("Exception parsing JSON after max items for key '$key': " . $e->getMessage());
                            }
                        } else {
                            error_log("Could not find the end of the last complete object for key '$key'");
                        }
                        
                        break;
                    }
                }
            }
            
            // Close the file
            fclose($handle);
            
        } catch (\Exception $e) {
            error_log("Exception in extractJsonArrayByKey for key '$key': " . $e->getMessage());
        }
        
        return $result;
    }
    
    /**
     * Extracts a scalar value from a large JSON file by key without loading the entire file into memory
     * 
     * @param string $filePath Path to the JSON file
     * @param string $key The key of the scalar value to extract
     * @return mixed The extracted scalar value or null if not found
     */
    private function extractJsonScalarByKey(string $filePath, string $key): mixed
    {
        // First, check if the file exists and is readable
        if (!is_readable($filePath)) {
            error_log("File is not readable: $filePath");
            return null;
        }
        
        try {
            // For very large files, we'll use a more efficient approach
            // We'll search for the specified key directly
            $handle = fopen($filePath, 'r');
            if (!$handle) {
                error_log("Could not open file: $filePath");
                return null;
            }
            
            // Skip ahead to find the specified key more quickly
            $found = false;
            $searchKey = '"' . $key . '"';
            $value = null;
            
            while (!$found && ($line = fgets($handle)) !== false) {
                if (strpos($line, $searchKey) !== false) {
                    $found = true;
                    
                    // Extract everything after the key
                    $keyPos = strpos($line, $searchKey);
                    $afterKey = substr($line, $keyPos + strlen($searchKey));
                    
                    // Check if the value is on this line
                    if (strpos($afterKey, ':') !== false) {
                        $colonPos = strpos($afterKey, ':');
                        $afterColon = trim(substr($afterKey, $colonPos + 1));
                        
                        // Extract the value based on its type
                        if (preg_match('/^"([^"]*)"/', $afterColon, $matches)) {
                            // String value
                            $value = $matches[1];
                        } elseif (preg_match('/^(\d+)/', $afterColon, $matches)) {
                            // Numeric value
                            $value = intval($matches[1]);
                        } elseif (preg_match('/^(true|false)/', $afterColon, $matches)) {
                            // Boolean value
                            $value = ($matches[1] === 'true');
                        } elseif (strpos($afterColon, 'null') === 0) {
                            // Null value
                            $value = null;
                        } else {
                            // The value might be on the next line or more complex
                            // For simplicity, we'll just use the regex approach as a fallback
                            if (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*"([^"]*)"/', $line, $matches)) {
                                // String value
                                $value = $matches[1];
                            } elseif (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*(\d+)/', $line, $matches)) {
                                // Numeric value
                                $value = intval($matches[1]);
                            } elseif (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*(true|false)/', $line, $matches)) {
                                // Boolean value
                                $value = ($matches[1] === 'true');
                            } elseif (strpos($line, 'null') !== false) {
                                // Null value
                                $value = null;
                            } else {
                                error_log("Could not extract value for key '$key' from line: " . trim($line));
                            }
                        }
                    } else {
                        // The value might be on the next line
                        error_log("Value for key '$key' might be on the next line, using fallback method");
                        
                        // Read the next line
                        $nextLine = fgets($handle);
                        if ($nextLine !== false) {
                            $combinedLine = $line . $nextLine;
                            
                            // Try to extract the value using regex
                            if (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*"([^"]*)"/', $combinedLine, $matches)) {
                                // String value
                                $value = $matches[1];
                            } elseif (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*(\d+)/', $combinedLine, $matches)) {
                                // Numeric value
                                $value = intval($matches[1]);
                            } elseif (preg_match('/"' . preg_quote($key, '/') . '"\s*:\s*(true|false)/', $combinedLine, $matches)) {
                                // Boolean value
                                $value = ($matches[1] === 'true');
                            } elseif (strpos($combinedLine, 'null') !== false) {
                                // Null value
                                $value = null;
                            } else {
                                error_log("Could not extract value for key '$key' from combined lines");
                            }
                        }
                    }
                    
                    break;
                }
            }
            
            // Close the file
            fclose($handle);
            
            if (!$found) {
                error_log("Key '$key' not found in file: $filePath");
            } else if ($value === null) {
                error_log("Value for key '$key' is null or could not be extracted");
            }
            
            return $value;
            
        } catch (\Exception $e) {
            error_log("Exception in extractJsonScalarByKey for key '$key': " . $e->getMessage());
            return null;
        }
    }
    
    /**
     * Extracts the specific_pages array from a large JSON file without loading the entire file into memory
     * This is a legacy method kept for backward compatibility
     * 
     * @param string $filePath Path to the JSON file
     * @param int $maxPages Maximum number of pages to extract (to prevent memory exhaustion)
     * @return array The extracted specific_pages array
     */
    private function extractSpecificPagesFromJson(string $filePath, int $maxPages = 100): array
    {
        return $this->extractJsonArrayByKey($filePath, 'specific_pages', $maxPages);
    }
    
    /**
     * Calculate the median value of an array of numbers
     * 
     * @param array $array Array of numbers
     * @return float The median value
     */
    private function calculateMedian(array $array): float
    {
        sort($array);
        $count = count($array);
        
        if ($count === 0) {
            return 0;
        }
        
        $middle = floor($count / 2);
        
        if ($count % 2 === 0) {
            // Even number of elements, average the two middle values
            return ($array[$middle - 1] + $array[$middle]) / 2;
        } else {
            // Odd number of elements, return the middle value
            return $array[$middle];
        }
    }
}