"""
Demo resource for the OpenEventDatabase.
This module imports and re-exports the demo resources from the demo package.
"""

import falcon
import requests
import json
import os
from collections import defaultdict
from oedb.utils.logging import logger
from oedb.utils.db import load_env_from_file
from oedb.resources.demo import demo_main, demo_traffic, demo_view_events

class DemoResource:
    """
    Resource for the demo endpoint.
    Handles the /demo endpoint and related demo pages.
    """
    
    def __init__(self):
        """
        Initialize the resource with a Jinja2 environment.
        """
        # Set up Jinja2 environment
        import jinja2
        import os
        template_dir = os.path.join(os.path.dirname(__file__), 'demo', 'templates')
        self.jinja_env = jinja2.Environment(
            loader=jinja2.FileSystemLoader(template_dir),
            autoescape=jinja2.select_autoescape(['html', 'xml'])
        )
    
    def on_get_edit(self, req, resp, id=None):
        """
        Handle GET requests to the /demo/edit endpoint.
        Returns an HTML page with a form for editing an existing event.
        
        Args:
            req: The request object.
            resp: The response object.
            id: The event ID to edit.
        """
        logger.info(f"Processing GET request to /demo/edit for event ID: {id}")
        
        if id is None:
            resp.status = falcon.HTTP_400
            resp.text = "Event ID is required"
            return
        
        try:
            # Set content type to HTML
            resp.content_type = 'text/html'
            
            # Fetch the event data from the API
            response = requests.get(f'https://api.openeventdatabase.org/event/{id}')
            
            if response.status_code != 200:
                resp.status = falcon.HTTP_404
                resp.text = f"Event with ID {id} not found"
                return
            
            event_data = response.json()
            
            # Render the template with the event data
            template = self.jinja_env.get_template('edit.html')
            html = template.render(
                id=id,
                event_data=event_data
            )
            
            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success(f"Successfully processed GET request to /demo/edit for event ID: {id}")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/edit: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"
    
    def on_get(self, req, resp):
        """
        Handle GET requests to the /demo endpoint.
        Delegates to the demo_main resource.
        
        Args:
            req: The request object.
            resp: The response object.
        """
        return demo_main.on_get(req, resp)
    
    def on_get_by_what(self, req, resp):
        """
        Handle GET requests to the /demo/by-what endpoint.
        Returns an HTML page with links to events organized by their "what" type.
        
        Args:
            req: The request object.
            resp: The response object.
        """
        logger.info("Processing GET request to /demo/by-what")
        
        try:
            # Set content type to HTML
            resp.content_type = 'text/html'
            
            # Fetch events from the API
            try:
                response = requests.get('/event?limit=1000')
                if response.status_code == 200 and response.text:
                    events_data = response.json()
                else:
                    logger.error(f"Error fetching events: Status code {response.status_code}, Response: {response.text}")
                    events_data = {"features": []}
            except json.JSONDecodeError as e:
                logger.error(f"Error parsing JSON response: {e}")
                events_data = {"features": []}
            except Exception as e:
                logger.error(f"Error fetching events: {e}")
                events_data = {"features": []}
            
            # Group events by "what" type
            events_by_what = defaultdict(list)
            
            if events_data.get('features'):
                for feature in events_data['features']:
                    properties = feature.get('properties', {})
                    what = properties.get('what', 'Unknown')
                    events_by_what[what].append({
                        'id': properties.get('id'),
                        'label': properties.get('label', 'Unnamed Event'),
                        'coordinates': feature.get('geometry', {}).get('coordinates', [0, 0])
                    })
            
            # Load and render the template with the appropriate variables
            template = self.jinja_env.get_template('by_what.html')
            
            # Sort event types alphabetically if we have events
            sorted_what_types = sorted(events_by_what.keys()) if events_by_what else []
            
            html = template.render(
                events_by_what=events_by_what,
                sorted_what_types=sorted_what_types
            )
            
            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success("Successfully processed GET request to /demo/by-what")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/by-what: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"
        
    def on_get_search(self, req, resp):
        """
        Handle GET requests to the /demo/search endpoint.
        Returns an HTML page with a form for searching events and displaying results.
        
        Args:
            req: The request object.
            resp: The response object.
        """
        logger.info("Processing GET request to /demo/search")
        
        try:
            # Set content type to HTML
            resp.content_type = 'text/html'
            
            # Render the template
            template = self.jinja_env.get_template('search.html')
            html = template.render()
            
            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success("Successfully processed GET request to /demo/search")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/search: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"
    
    def on_get_map_by_what(self, req, resp):
        """
        Handle GET requests to the /demo/map-by-what endpoint.
        Returns an HTML page with a MapLibre map showing events filtered by "what" type.
        
        Args:
            req: The request object.
            resp: The response object.
        """
        logger.info("Processing GET request to /demo/map-by-what")
        
        try:
            # Set content type to HTML
            resp.content_type = 'text/html'
            
            # Render the template
            template = self.jinja_env.get_template('map_by_what.html')
            html = template.render()
            
            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success("Successfully processed GET request to /demo/map-by-what")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/map-by-what: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"

    def on_get_map_by_what_type(self, req, resp, event_type):
        """
        Handle GET requests to the /demo/map-by-what/{type} endpoint.
        Returns an HTML page with a MapLibre map showing events of a specific type,
        colored by temporality (past/present/future) with a detailed table.

        Args:
            req: The request object.
            resp: The response object.
            event_type: The event type to filter by.
        """
        logger.info(f"Processing GET request to /demo/map-by-what/{event_type}")

        try:
            # Set content type to HTML
            resp.content_type = 'text/html'

            # Render the template with the event type
            template = self.jinja_env.get_template('map_by_what_type.html')
            html = template.render(
                event_type=event_type,
                event_type_label=event_type.replace('_', ' ').title()
            )

            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success(f"Successfully processed GET request to /demo/map-by-what/{event_type}")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/map-by-what/{event_type}: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"
            events_by_what = defaultdict(list)
            
            if events_data.get('features'):
                for feature in events_data['features']:
                    properties = feature.get('properties', {})
                    what = properties.get('what', 'Unknown')
                    events_by_what[what].append({
                        'id': properties.get('id'),
                        'label': properties.get('label', 'Unnamed Event'),
                        'coordinates': feature.get('geometry', {}).get('coordinates', [0, 0])
                    })
            
            # Create HTML response
            html = """
            <!DOCTYPE html>
            <html lang="en">
            <head>
                <meta charset="UTF-8">
                <meta name="viewport" content="width=device-width, initial-scale=1.0">
                <title>Events by Type - OpenEventDatabase</title>
                <style>
                    body { 
                        font-family: Arial, sans-serif; 
                        line-height: 1.6;
                        max-width: 1200px;
                        margin: 0 auto;
                        padding: 20px;
                    }
                    h1 { color: #333; }
                    h2 { 
                        color: #0078ff; 
                        margin-top: 30px;
                        padding-bottom: 5px;
                        border-bottom: 1px solid #eee;
                    }
                    ul { padding-left: 20px; }
                    li { margin-bottom: 8px; }
                    a { color: #0078ff; text-decoration: none; }
                    a:hover { text-decoration: underline; }
                    .nav { 
                        background-color: #f5f5f5;
                        padding: 10px;
                        border-radius: 5px;
                        margin-bottom: 20px;
                    }
                    .nav a {
                        margin-right: 15px;
                    }
                    .event-count {
                        color: #666;
                        font-size: 0.9em;
                    }
                </style>
            </head>
            <body>
                <div class="nav">
                    <a href="/">Home</a>
                    <a href="/demo">Demo Map</a>
                    <a href="/demo/map-by-what">Map by Event Type</a>
                </div>
                
                <h1>Events by Type</h1>
                <p>This page lists all events from the OpenEventDatabase organized by their type.</p>
            """
            
            # Add event types and their events
            if events_by_what:
                # Sort event types alphabetically
                sorted_what_types = sorted(events_by_what.keys())
                
                # Add quick navigation
                html += "<h2>Quick Navigation</h2><ul>"
                for what_type in sorted_what_types:
                    event_count = len(events_by_what[what_type])
                    html += f'<li><a href="#what-{what_type.replace(" ", "-")}">{what_type}</a> <span class="event-count">({event_count} events)</span></li>'
                html += "</ul>"
                
                # Add sections for each event type
                for what_type in sorted_what_types:
                    events = events_by_what[what_type]
                    html += f'<h2 id="what-{what_type.replace(" ", "-")}">{what_type} <span class="event-count">({len(events)} events)</span></h2>'
                    html += "<ul>"
                    
                    # Sort events by label
                    sorted_events = sorted(events, key=lambda x: x.get('label', ''))
                    
                    for event in sorted_events:
                        event_id = event.get('id')
                        event_label = event.get('label', 'Unnamed Event')
                        coordinates = event.get('coordinates', [0, 0])
                        
                        html += f'<li><a href="/event/{event_id}" >{event_label}</a> '
                        html += f'<small>[<a href="https://www.openstreetmap.org/?mlat={coordinates[1]}&mlon={coordinates[0]}&zoom=15" >map</a>]</small></li>'
                    
                    html += "</ul>"
            else:
                html += "<p>No events found in the database.</p>"
            
            html += """
            </body>
            </html>
            """
            
            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success("Successfully processed GET request to /demo/by-what")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/by-what: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"

    def on_get_traffic(self, req, resp):
        """
        Handle GET requests to the /demo/traffic endpoint.
        Delegates to the demo_traffic resource.
        
        Args:
            req: The request object.
            resp: The response object.
        """
        return demo_traffic.on_get(req, resp)
    
    def on_get_view_events(self, req, resp):
        """
        Handle GET requests to the /demo/view-events endpoint.
        Delegates to the demo_view_events resource.

        Args:
            req: The request object.
            resp: The response object.
        """
        return demo_view_events.on_get(req, resp)

    def on_get_by_id(self, req, resp, id):
        """
        Handle GET requests to /demo/by_id/{id}.
        Show a map with the event location and a table of its properties.
        """
        import requests
        import json
        logger.info(f"Processing GET request to /demo/by_id/{id}")
        try:
            resp.content_type = 'text/html'
            r = requests.get(f"https://api.openeventdatabase.org/event/{id}")
            r.raise_for_status()
            feature = r.json()
            
            # Load and render the template
            template = self.jinja_env.get_template('event_details.html')
            html = template.render(
                id=id,
                feature_json=json.dumps(feature),
                properties=feature.get('properties') or {}
            )
            
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success(f"Successfully processed GET request to /demo/by_id/{id}")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/by_id/{id}: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"

    def on_get_property_stats(self, req, resp):
        """
        Handle GET requests to the /demo/property-stats endpoint.
        Returns an HTML page with statistics about property occurrences in the last 200 events.

        Args:
            req: The request object.
            resp: The response object.
        """
        logger.info("Processing GET request to /demo/property-stats")

        try:
            # Set content type to HTML
            resp.content_type = 'text/html'

            # Fetch the last 200 events from the API
            try:
                response = requests.get('https://api.openeventdatabase.org/event?limit=200')
                if response.status_code == 200 and response.text:
                    events_data = response.json()
                else:
                    logger.error(f"Error fetching events: Status code {response.status_code}")
                    events_data = {"features": []}
            except Exception as e:
                logger.error(f"Error fetching events: {e}")
                events_data = {"features": []}

            # Count property occurrences
            property_counts = {}
            total_events = len(events_data.get('features', []))

            for feature in events_data.get('features', []):
                properties = feature.get('properties', {})
                for prop_name in properties.keys():
                    if prop_name in property_counts:
                        property_counts[prop_name] += 1
                    else:
                        property_counts[prop_name] = 1

            # Sort properties by occurrence count (descending order)
            sorted_properties = sorted(property_counts.items(), key=lambda x: x[1], reverse=True)

            # Render the template
            template = self.jinja_env.get_template('property_stats.html')
            html = template.render(
                property_stats=sorted_properties,
                total_events=total_events,
                unique_properties=len(sorted_properties)
            )

            # Set the response body and status
            resp.text = html
            resp.status = falcon.HTTP_200
            logger.success("Successfully processed GET request to /demo/property-stats")
        except Exception as e:
            logger.error(f"Error processing GET request to /demo/property-stats: {e}")
            resp.status = falcon.HTTP_500
            resp.text = f"Error: {str(e)}"

# Create a global instance of DemoResource
demo = DemoResource()