<?php

namespace App\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Annotation\Route;
use Symfony\Component\HttpFoundation\JsonResponse;
use Symfony\Component\Filesystem\Filesystem;
use Doctrine\ORM\EntityManagerInterface;
use App\Entity\Place;
use App\Entity\Stats;

class FraicheurController extends AbstractController
{
    public function __construct(private EntityManagerInterface $entityManager) {}

    #[Route('/admin/fraicheur/histogramme', name: 'admin_fraicheur_histogramme')]
    public function showFraicheurHistogramme(): Response
    {
        $jsonPath = $this->getParameter('kernel.project_dir') . '/var/fraicheur_osm.json';
        if (!file_exists($jsonPath)) {
            $this->calculateFraicheur();
        }
        return $this->render('admin/fraicheur_histogramme.html.twig');
    }

    #[Route('/admin/fraicheur/calculate', name: 'admin_fraicheur_calculate')]
    public function calculateFraicheur(): Response
    {
        $filesystem = new Filesystem();
        $jsonPath = $this->getParameter('kernel.project_dir') . '/var/fraicheur_osm.json';
        $now = new \DateTime();
        $places = $this->entityManager->getRepository(Place::class)->findAll();
        $histogram = [];
        $total = 0;
        foreach ($places as $place) {
            $date = $place->getOsmDataDate();
            if ($date) {
                $key = $date->format('Y-m');
                if (!isset($histogram[$key])) {
                    $histogram[$key] = 0;
                }
                $histogram[$key]++;
                $total++;
            }
        }
        ksort($histogram);
        $data = [
            'generated_at' => $now->format('c'),
            'total' => $total,
            'histogram' => $histogram
        ];
        $filesystem->dumpFile($jsonPath, json_encode($data, JSON_PRETTY_PRINT|JSON_UNESCAPED_UNICODE));

        // --- Distribution villes selon lieux/habitants ---
        $distJsonPath = $this->getParameter('kernel.project_dir') . '/var/distribution_villes_lieux_par_habitant.json';
        $statsRepo = $this->entityManager->getRepository(Stats::class);
        $allStats = $statsRepo->findAll();
        $histogram_lieux_par_habitant = [];
        $histogram_habitants_par_lieu = [];
        $villesByBinLph = [];
        $villesByBinHpl = [];
        $totalVilles = 0;
        foreach ($allStats as $stat) {
            $places = $stat->getPlacesCount();
            $population = $stat->getPopulation();
            $name = $stat->getName();
            if ($places && $population && $population > 0 && $name) {
                // lieux par habitant (pas de 0.01)
                $ratio_lph = $places / $population;
                $bin_lph = number_format(floor($ratio_lph / 0.01) * 0.01, 2, '.', '');
                if (!isset($histogram_lieux_par_habitant[$bin_lph])) $histogram_lieux_par_habitant[$bin_lph] = 0;
                $histogram_lieux_par_habitant[$bin_lph]++;
                if (!isset($villesByBinLph[$bin_lph])) $villesByBinLph[$bin_lph] = [];
                $villesByBinLph[$bin_lph][] = $name;
                // habitants par lieu (pas de 10)
                $ratio_hpl = $population / $places;
                $bin_hpl = (string)(ceil($ratio_hpl / 10) * 10);
                if (!isset($histogram_habitants_par_lieu[$bin_hpl])) $histogram_habitants_par_lieu[$bin_hpl] = 0;
                $histogram_habitants_par_lieu[$bin_hpl]++;
                if (!isset($villesByBinHpl[$bin_hpl])) $villesByBinHpl[$bin_hpl] = [];
                $villesByBinHpl[$bin_hpl][] = $name;
                $totalVilles++;
            }
        }
        ksort($histogram_lieux_par_habitant);
        ksort($histogram_habitants_par_lieu);
        ksort($villesByBinLph);
        ksort($villesByBinHpl);
        $distData = [
            'generated_at' => $now->format('c'),
            'total_villes' => $totalVilles,
            'histogram_001' => $histogram_lieux_par_habitant,
            'histogram_10' => $histogram_habitants_par_lieu,
            'villes_by_bin_001' => $villesByBinLph,
            'villes_by_bin_10' => $villesByBinHpl
        ];
        $filesystem->dumpFile($distJsonPath, json_encode($distData, JSON_PRETTY_PRINT|JSON_UNESCAPED_UNICODE));

        return $this->redirectToRoute('admin_fraicheur_histogramme');
    }

    #[Route('/admin/fraicheur/download', name: 'admin_fraicheur_download')]
    public function downloadFraicheur(): JsonResponse
    {
        $jsonPath = $this->getParameter('kernel.project_dir') . '/var/fraicheur_osm.json';
        if (!file_exists($jsonPath)) {
            return new JsonResponse(['error' => 'Fichier non généré'], 404);
        }
        $content = file_get_contents($jsonPath);
        $data = json_decode($content, true);
        return new JsonResponse($data);
    }

    #[Route('/admin/distribution_villes_lieux_par_habitant_download', name: 'admin_distribution_villes_lieux_par_habitant_download')]
    public function downloadDistributionVillesLieuxParHabitant(): JsonResponse
    {
        $jsonPath = $this->getParameter('kernel.project_dir') . '/var/distribution_villes_lieux_par_habitant.json';
        if (!file_exists($jsonPath)) {
            $this->calculateFraicheur();
        }
        $content = file_get_contents($jsonPath);
        $data = json_decode($content, true);
        return new JsonResponse($data);
    }

    #[Route('/admin/distribution_villes_lieux_par_habitant_villes', name: 'admin_distribution_villes_lieux_par_habitant_villes')]
    public function downloadDistributionVillesLieuxParHabitantVilles(): JsonResponse
    {
        $jsonPath = $this->getParameter('kernel.project_dir') . '/var/distribution_villes_lieux_par_habitant.json';
        if (!file_exists($jsonPath)) {
            $this->calculateFraicheur();
        }
        $content = file_get_contents($jsonPath);
        $data = json_decode($content, true);
        // On renvoie les deux listes de villes par bin
        return new JsonResponse([
            'villes_by_bin_001' => $data['villes_by_bin_001'] ?? [],
            'villes_by_bin_10' => $data['villes_by_bin_10'] ?? []
        ]);
    }
}