import requests
import logging
import xml.etree.ElementTree as ET
from datetime import datetime
from dateutil import parser as date_parser

logger = logging.getLogger(__name__)


class JackettAPI:
    """Classe pour interagir avec l'API Jackett"""

    def __init__(self, base_url, api_key):
        self.base_url = base_url.rstrip('/')
        self.api_key = api_key
        self.session = requests.Session()
        self.session.headers.update({
            'User-Agent': 'Lycostorrent/2.0'
        })

    def get_indexers(self):
        """Récupère la liste des indexers (trackers) configurés dans Jackett"""
        try:
            url = f"{self.base_url}/api/v2.0/indexers/all/results/torznab/api"
            params = {
                'apikey': self.api_key,
                't': 'indexers',
                'configured': 'true'
            }

            response = self.session.get(url, params=params, timeout=10)
            response.raise_for_status()

            root = ET.fromstring(response.content)

            indexers = []
            for indexer in root.findall('.//indexer'):
                indexer_data = {
                    'id': indexer.get('id'),
                    'name': indexer.find('title').text if indexer.find('title') is not None else 'Unknown',
                    'type': indexer.get('type', 'public'),
                }
                indexers.append(indexer_data)

            logger.info(f"✅ {len(indexers)} indexers récupérés depuis Jackett")
            return indexers

        except requests.exceptions.RequestException as e:
            logger.error(f"❌ Erreur connexion Jackett: {e}")
            return self._get_indexers_fallback()
        except Exception as e:
            logger.error(f"❌ Erreur récupération indexers: {e}")
            return []

    def _get_indexers_fallback(self):
        """Méthode alternative pour récupérer les indexers"""
        try:
            url = f"{self.base_url}/api/v2.0/indexers"
            params = {'apikey': self.api_key}

            response = self.session.get(url, params=params, timeout=10)
            response.raise_for_status()
            data = response.json()

            indexers = []
            for indexer in data:
                if indexer.get('configured', False):
                    indexers.append({
                        'id': indexer.get('id'),
                        'name': indexer.get('name', 'Unknown'),
                        'type': indexer.get('type', 'public'),
                    })

            return indexers
        except Exception as e:
            logger.error(f"❌ Erreur fallback indexers: {e}")
            return []

    def search(self, query, indexers=None, category=None, max_results=2000):
        """
        Effectue une recherche sur Jackett avec pagination.
        
        Args:
            query: Terme de recherche
            indexers: Liste des trackers à utiliser
            category: ID de catégorie Jackett (2000=films, 5000=séries, etc.)
            max_results: Nombre max de résultats
        
        Returns:
            Liste de résultats formatés
        """
        try:
            url = f"{self.base_url}/api/v2.0/indexers/all/results"
            all_results = []
            offset = 0
            limit_per_request = 500

            while len(all_results) < max_results:
                params = {
                    'apikey': self.api_key,
                    'Query': query,
                    'limit': limit_per_request,
                    'offset': offset,
                }

                # Ajouter les trackers si spécifiés
                if indexers and len(indexers) > 0:
                    params['Tracker[]'] = indexers

                # Ajouter la catégorie si spécifiée
                if category:
                    params['Category'] = category

                logger.info(f"🔍 Requête Jackett: query='{query}', offset={offset}, limit={limit_per_request}")

                response = self.session.get(url, params=params, timeout=60)
                response.raise_for_status()

                data = response.json()
                results = data.get('Results', [])

                if not results:
                    break

                all_results.extend(results)

                # Si on a moins de résultats que la limite, c'est qu'on a tout récupéré
                if len(results) < limit_per_request:
                    break

                offset += limit_per_request

            # Formater les résultats
            formatted_results = [self._format_result(r) for r in all_results[:max_results]]

            logger.info(f"✅ {len(formatted_results)} résultats récupérés au total")
            return formatted_results

        except requests.exceptions.Timeout:
            logger.error("⏱️ Timeout lors de la recherche Jackett")
            return []
        except requests.exceptions.RequestException as e:
            logger.error(f"❌ Erreur connexion Jackett: {e}")
            return []
        except Exception as e:
            logger.error(f"❌ Erreur recherche: {e}", exc_info=True)
            return []

    def _format_result(self, result):
        """Formate un résultat Jackett"""
        try:
            # Parser la date
            publish_date = result.get('PublishDate', '')
            try:
                if publish_date:
                    dt = date_parser.parse(publish_date)
                    formatted_date = dt.strftime('%Y-%m-%d %H:%M')
                else:
                    formatted_date = 'N/A'
            except:
                formatted_date = 'N/A'

            return {
                'Title': result.get('Title', 'Sans titre'),
                'Tracker': result.get('Tracker', 'Unknown'),
                'Category': result.get('CategoryDesc', 'N/A'),
                'PublishDate': formatted_date,
                'PublishDateRaw': publish_date,
                'Size': result.get('Size', 0),
                'SizeFormatted': self._format_size(result.get('Size', 0)),
                'Seeders': result.get('Seeders', 0),
                'Peers': result.get('Peers', 0),
                'Link': result.get('Link', ''),
                'MagnetUri': result.get('MagnetUri', ''),
                'Guid': result.get('Guid', ''),
                'Details': result.get('Details', ''),
            }
        except Exception as e:
            logger.warning(f"⚠️ Erreur formatage résultat: {e}")
            return result

    def _format_size(self, size_bytes):
        """Convertit une taille en bytes vers un format lisible"""
        try:
            size_bytes = int(size_bytes)
            if size_bytes == 0:
                return "0 B"

            units = ['B', 'KB', 'MB', 'GB', 'TB']
            unit_index = 0
            size = float(size_bytes)

            while size >= 1024 and unit_index < len(units) - 1:
                size /= 1024
                unit_index += 1

            if unit_index >= 2:  # MB et plus
                return f"{size:.2f} {units[unit_index]}"
            else:
                return f"{size:.0f} {units[unit_index]}"
        except:
            return "N/A"