"""
Admin Panel Telegram Bot
Sends notifications about new users and new tracked players
"""

import logging
from typing import Optional

from telegram import Update
from telegram.ext import Application, CommandHandler, ContextTypes

from config import ADMINPANEL_TELEGRAM_BOT_TOKEN, DATABASE_PATH
from database import Database

# Configure logging
logging.basicConfig(
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',
    level=logging.INFO
)
logger = logging.getLogger(__name__)


class AdminBot:
    def __init__(self):
        self.db = Database()
        self.application = None
        
    async def send_notification(self, message: str):
        """Send notification to admin chat"""
        admin_chat_id = self.get_admin_chat_id()
        if not admin_chat_id:
            logger.warning("Admin chat ID not set, cannot send notification")
            return
        
        # Try to use application if available (when running as separate service)
        if self.application:
            try:
                await self.application.bot.send_message(
                    chat_id=admin_chat_id,
                    text=message,
                    parse_mode='HTML'
                )
                logger.debug(f"Notification sent via application to chat {admin_chat_id}")
                return
            except Exception as e:
                logger.warning(f"Failed to send via application: {e}, trying direct API call")
        
        # Fallback: use direct Telegram API call
        try:
            import aiohttp
            url = f"https://api.telegram.org/bot{ADMINPANEL_TELEGRAM_BOT_TOKEN}/sendMessage"
            async with aiohttp.ClientSession() as session:
                async with session.post(url, json={
                    "chat_id": admin_chat_id,
                    "text": message,
                    "parse_mode": "HTML"
                }) as response:
                    if response.status == 200:
                        logger.debug(f"Notification sent via direct API to chat {admin_chat_id}")
                    else:
                        error_text = await response.text()
                        logger.error(f"Failed to send notification: {response.status} - {error_text}")
        except Exception as e:
            logger.error(f"Failed to send admin notification via API: {e}")
            import traceback
            logger.error(traceback.format_exc())
    
    def get_admin_chat_id(self) -> Optional[int]:
        """Get admin chat ID from database"""
        return self.db.get_admin_chat_id()
    
    def set_admin_chat_id(self, chat_id: int):
        """Set admin chat ID in database"""
        self.db.set_admin_chat_id(chat_id)
    
    async def notify_new_user(self, user_id: int, username: Optional[str], first_name: Optional[str]):
        """Send notification about new Telegram user"""
        username_text = f"@{username}" if username else "без username"
        name_text = first_name if first_name else "без имени"
        
        message = (
            f"🆕 <b>Новый пользователь Telegram</b>\n\n"
            f"ID: {user_id}\n"
            f"Username: {username_text}\n"
            f"Имя: {name_text}"
        )
        await self.send_notification(message)
    
    async def notify_new_player(self, player_username: str, added_by_user_id: int, added_by_username: Optional[str]):
        """Send notification about new tracked player"""
        added_by_text = f"@{added_by_username}" if added_by_username else f"ID: {added_by_user_id}"
        lichess_url = f"https://lichess.org/@/{player_username}"
        
        message = (
            f"🎮 <b>Добавлен новый игрок для отслеживания</b>\n\n"
            f"Игрок: <a href=\"{lichess_url}\">{player_username}</a>\n"
            f"Добавил: {added_by_text}"
        )
        await self.send_notification(message)
    
    async def status(self, update: Update, context: ContextTypes.DEFAULT_TYPE):
        """Status command - show statistics"""
        try:
            import sqlite3
            conn = sqlite3.connect(self.db.db_path)
            cursor = conn.cursor()
            
            # Count users
            cursor.execute("SELECT COUNT(*) FROM telegram_users")
            users_count = cursor.fetchone()[0]
            
            # Count unique gamers
            cursor.execute("SELECT COUNT(DISTINCT username) FROM gamers")
            gamers_count = cursor.fetchone()[0]
            
            conn.close()
            
            message = (
                f"📊 <b>Статистика базы данных</b>\n\n"
                f"👥 Пользователей Telegram: {users_count}\n"
                f"🎮 Отслеживаемых игроков: {gamers_count}"
            )
            await update.message.reply_text(message, parse_mode='HTML')
        except Exception as e:
            logger.error(f"Error getting status: {e}")
            await update.message.reply_text(f"❌ Ошибка получения статистики: {e}")
    
    async def start(self, update: Update, context: ContextTypes.DEFAULT_TYPE):
        """Start command - register admin chat"""
        try:
            chat_id = update.effective_chat.id
            self.set_admin_chat_id(chat_id)
            
            await update.message.reply_text(
                "✅ Админ-панель активирована!\n\n"
                "Доступные команды:\n"
                "/status - Показать статистику"
            )
        except Exception as e:
            logger.error(f"Error in start command: {e}")
            import traceback
            logger.error(traceback.format_exc())
            try:
                await update.message.reply_text(f"Ошибка: {e}")
            except:
                pass
    
    def setup_handlers(self, application: Application):
        """Setup all handlers"""
        self.application = application  # Store application reference
        
        # Add start command handler
        application.add_handler(CommandHandler("start", self.start))
        
        # Add status command handler
        application.add_handler(CommandHandler("status", self.status))


# Global admin bot instance
_admin_bot_instance: Optional[AdminBot] = None


def get_admin_bot() -> Optional[AdminBot]:
    """Get global admin bot instance"""
    return _admin_bot_instance


def init_admin_bot():
    """Initialize admin bot"""
    global _admin_bot_instance
    if not _admin_bot_instance:
        _admin_bot_instance = AdminBot()
    return _admin_bot_instance


def main():
    """Main function"""
    admin_bot = init_admin_bot()
    
    # Create application with Long Polling configuration
    application = Application.builder().token(ADMINPANEL_TELEGRAM_BOT_TOKEN).build()
    
    # Setup handlers
    admin_bot.setup_handlers(application)
    
    # Set application reference
    admin_bot.application = application
    
    # Add error handler
    async def error_handler(update: object, context: ContextTypes.DEFAULT_TYPE) -> None:
        """Log the error and send a telegram message to notify the developer."""
        logger.error(f"Exception while handling an update: {context.error}")
        import traceback
        logger.error(traceback.format_exc())
    
    application.add_error_handler(error_handler)
    
    # Add post_init hook to log bot info
    async def post_init(app: Application) -> None:
        bot_info = await app.bot.get_me()
        logger.info(f"Admin bot initialized: @{bot_info.username} (ID: {bot_info.id})")
    
    application.post_init = post_init
    
    # Start the bot with Long Polling
    logger.info("Starting Admin Panel Bot with Long Polling...")
    try:
        application.run_polling(
            poll_interval=1.0,
            timeout=30,
            drop_pending_updates=True,
            allowed_updates=["message", "callback_query"]
        )
    except Exception as e:
        logger.error(f"Fatal error in run_polling: {e}")
        import traceback
        logger.error(traceback.format_exc())
        raise


if __name__ == '__main__':
    main()