#!/usr/bin/env python3
"""
PetBot with Advanced IRC Connection Management
Includes automatic reconnection, health monitoring, and graceful error handling.
"""

import asyncio
import sys
import os
import importlib
import logging
import signal
from datetime import datetime

# Add the project directory to the path
sys.path.append(os.path.dirname(os.path.abspath(__file__)))

from src.database import Database
from src.game_engine import GameEngine
from src.irc_connection_manager import IRCConnectionManager, ConnectionState
from src.rate_limiter import RateLimiter, get_command_category
from modules import CoreCommands, Exploration, BattleSystem, PetManagement, Achievements, Admin, Inventory, GymBattles, TeamBuilder
from webserver import PetBotWebServer
from config import IRC_CONFIG, RATE_LIMIT_CONFIG


class PetBotWithReconnect:
    """
    Enhanced PetBot with robust IRC connection management.
    """
    
    def __init__(self):
        # Setup logging
        logging.basicConfig(
            level=logging.INFO,
            format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
        )
        self.logger = logging.getLogger(__name__)
        
        self.logger.info("🤖 PetBot with Auto-Reconnect - Initializing...")
        
        # Core components
        self.database = Database()
        self.game_engine = GameEngine(self.database)
        self.config = IRC_CONFIG
        
        # Connection and state management
        self.connection_manager = None
        self.running = False
        self.shutdown_requested = False
        
        # Module management
        self.modules = {}
        self.command_map = {}
        self.active_encounters = {}
        
        # Web server
        self.web_server = None
        
        # Rate limiting
        self.rate_limiter = None
        
        # Statistics
        self.startup_time = datetime.now()
        self.command_count = 0
        self.connection_events = []
        
        self.logger.info("✅ Basic initialization complete")
    
    async def initialize(self):
        """Initialize all async components."""
        try:
            self.logger.info("🔄 Initializing async components...")
            
            # Initialize database
            self.logger.info("🔄 Initializing database...")
            await self.database.init_database()
            self.logger.info("✅ Database initialized")
            
            # Load game data
            self.logger.info("🔄 Loading game data...")
            await self.game_engine.load_game_data()
            self.logger.info("✅ Game data loaded")
            
            # Load modules
            self.logger.info("🔄 Loading command modules...")
            await self.load_modules()
            self.logger.info("✅ Modules loaded")
            
            # Validate player data
            self.logger.info("🔄 Validating player data...")
            await self.validate_all_player_data()
            self.logger.info("✅ Player data validation complete")
            
            # Initialize rate limiter with config
            self.logger.info("🔄 Initializing rate limiter...")
            self.rate_limiter = RateLimiter(RATE_LIMIT_CONFIG)
            self.logger.info("✅ Rate limiter initialized")
            
            # Start web server
            self.logger.info("🔄 Starting web server...")
            self.web_server = PetBotWebServer(self.database, port=8080, bot=self)
            self.web_server.start_in_thread()
            self.logger.info("✅ Web server started on port 8080")
            
            # Initialize connection manager
            self.logger.info("🔄 Initializing IRC connection manager...")
            self.connection_manager = IRCConnectionManager(self.config, self)
            self.connection_manager.set_callbacks(
                on_connect=self.on_irc_connect,
                on_disconnect=self.on_irc_disconnect,
                on_message=self.on_irc_message,
                on_connection_lost=self.on_connection_lost
            )
            self.logger.info("✅ IRC connection manager initialized")
            
            # Start background tasks
            self.logger.info("🔄 Starting background tasks...")
            asyncio.create_task(self.background_validation_task())
            asyncio.create_task(self.connection_stats_task())
            self.logger.info("✅ Background tasks started")
            
            self.logger.info("🎉 All components initialized successfully!")
            
        except Exception as e:
            self.logger.error(f"❌ Initialization failed: {e}")
            raise
    
    async def load_modules(self):
        """Load all command modules."""
        module_classes = [
            CoreCommands,
            Exploration,
            BattleSystem,
            PetManagement,
            Achievements,
            Admin,
            Inventory,
            GymBattles,
            TeamBuilder
        ]
        
        self.modules = {}
        self.command_map = {}
        
        for module_class in module_classes:
            try:
                module_name = module_class.__name__
                self.logger.info(f"  Loading {module_name}...")
                
                module_instance = module_class(self, self.database, self.game_engine)
                self.modules[module_name] = module_instance
                
                # Map commands to modules
                commands = module_instance.get_commands()
                for command in commands:
                    self.command_map[command] = module_instance
                
                self.logger.info(f"  ✅ {module_name}: {len(commands)} commands")
                
            except Exception as e:
                self.logger.error(f"  ❌ Failed to load {module_name}: {e}")
                raise
        
        self.logger.info(f"✅ Loaded {len(self.modules)} modules with {len(self.command_map)} commands")
    
    async def reload_modules(self):
        """Reload all modules (for admin use)."""
        try:
            self.logger.info("🔄 Reloading modules...")
            
            # Reload module files
            import modules
            importlib.reload(modules.core_commands)
            importlib.reload(modules.exploration)
            importlib.reload(modules.battle_system)
            importlib.reload(modules.pet_management)
            importlib.reload(modules.achievements)
            importlib.reload(modules.admin)
            importlib.reload(modules.inventory)
            importlib.reload(modules.gym_battles)
            importlib.reload(modules.team_builder)
            importlib.reload(modules)
            
            # Reinitialize modules
            await self.load_modules()
            
            self.logger.info("✅ Modules reloaded successfully")
            return True
            
        except Exception as e:
            self.logger.error(f"❌ Module reload failed: {e}")
            return False
    
    async def validate_all_player_data(self):
        """Validate and refresh all player data."""
        try:
            import aiosqlite
            async with aiosqlite.connect(self.database.db_path) as db:
                cursor = await db.execute("SELECT id, nickname FROM players")
                players = await cursor.fetchall()
            
            self.logger.info(f"🔄 Validating {len(players)} players...")
            
            for player_id, nickname in players:
                try:
                    # Check and award missing achievements
                    new_achievements = await self.game_engine.check_all_achievements(player_id)
                    
                    if new_achievements:
                        self.logger.info(f"  🏆 {nickname}: Restored {len(new_achievements)} achievements")
                    
                    # Validate team composition
                    team_composition = await self.database.get_team_composition(player_id)
                    if team_composition["active_pets"] == 0 and team_composition["total_pets"] > 0:
                        pets = await self.database.get_player_pets(player_id)
                        if pets:
                            first_pet = pets[0]
                            await self.database.activate_pet(player_id, str(first_pet["id"]))
                            self.logger.info(f"  🔧 {nickname}: Auto-activated pet {first_pet['nickname'] or first_pet['species_name']}")
                    
                except Exception as e:
                    self.logger.error(f"  ❌ Error validating {nickname}: {e}")
            
            self.logger.info("✅ Player data validation complete")
            
        except Exception as e:
            self.logger.error(f"❌ Player data validation failed: {e}")
    
    async def background_validation_task(self):
        """Background task for periodic validation."""
        while self.running:
            try:
                await asyncio.sleep(1800)  # Run every 30 minutes
                if self.running:
                    self.logger.info("🔄 Running periodic validation...")
                    await self.validate_all_player_data()
                    
            except asyncio.CancelledError:
                break
            except Exception as e:
                self.logger.error(f"❌ Background validation error: {e}")
    
    async def connection_stats_task(self):
        """Background task for connection statistics."""
        while self.running:
            try:
                await asyncio.sleep(300)  # Log stats every 5 minutes
                if self.running and self.connection_manager:
                    stats = self.connection_manager.get_connection_stats()
                    if stats["connected"]:
                        self.logger.info(f"📊 Connection stats: {stats['message_count']} messages, {stats['total_reconnections']} reconnections")
                    
            except asyncio.CancelledError:
                break
            except Exception as e:
                self.logger.error(f"❌ Connection stats error: {e}")
    
    async def on_irc_connect(self):
        """Called when IRC connection is established."""
        self.logger.info("🎉 IRC connection established successfully!")
        self.connection_events.append({"type": "connect", "time": datetime.now()})
        
        # Send welcome message to channel
        if self.connection_manager:
            await self.connection_manager.send_message(
                self.config["channel"], 
                "🤖 PetBot is online and ready for commands! Use !help to get started."
            )
    
    async def on_irc_disconnect(self, error):
        """Called when IRC connection is lost."""
        self.logger.warning(f"💔 IRC connection lost: {error}")
        self.connection_events.append({"type": "disconnect", "time": datetime.now(), "error": str(error)})
    
    async def on_connection_lost(self, error):
        """Called when connection is lost and reconnection will be attempted."""
        self.logger.warning(f"🔄 Connection lost, will attempt reconnection: {error}")
        self.connection_events.append({"type": "reconnect_attempt", "time": datetime.now(), "error": str(error)})
    
    async def on_irc_message(self, line):
        """Called when IRC message is received."""
        # Handle private messages and channel messages
        parts = line.split()
        if len(parts) < 4:
            return
        
        if parts[1] == "PRIVMSG":
            channel = parts[2]
            message = " ".join(parts[3:])[1:]  # Remove leading ':'
            
            # Extract nickname from hostmask
            hostmask = parts[0][1:]  # Remove leading ':'
            nickname = hostmask.split('!')[0]
            
            # Handle commands
            if message.startswith(self.config["command_prefix"]):
                self.logger.info(f"🎮 Command from {nickname}: {message}")
                await self.handle_command(channel, nickname, message)
    
    async def handle_command(self, channel, nickname, message):
        """Handle IRC commands with rate limiting."""
        from modules.base_module import BaseModule
        
        command_parts = message[1:].split()
        if not command_parts:
            return
        
        command = BaseModule.normalize_input(command_parts[0])
        args = BaseModule.normalize_input(command_parts[1:])
        
        try:
            # Check rate limit first
            if self.rate_limiter:
                category = get_command_category(command)
                allowed, rate_limit_message = await self.rate_limiter.check_rate_limit(
                    nickname, category, command
                )
                
                if not allowed:
                    await self.send_message(channel, f"{nickname}: {rate_limit_message}")
                    return
            
            self.command_count += 1
            
            if command in self.command_map:
                module = self.command_map[command]
                self.logger.info(f"🔧 Executing {command} via {module.__class__.__name__}")
                await module.handle_command(channel, nickname, command, args)
            else:
                await self.send_message(channel, f"{nickname}: Unknown command. Use !help for available commands.")
                
        except Exception as e:
            self.logger.error(f"❌ Command error: {e}")
            await self.send_message(channel, f"{nickname}: Error processing command: {str(e)}")
    
    async def send_message(self, target, message):
        """Send message via connection manager."""
        if self.connection_manager:
            success = await self.connection_manager.send_message(target, message)
            if not success:
                self.logger.warning(f"Failed to send message to {target}: {message}")
        else:
            self.logger.warning(f"No connection manager available to send message to {target}")
    
    def send_message_sync(self, target, message):
        """Synchronous wrapper for send_message (for compatibility with old modules)."""
        if hasattr(self, 'loop') and self.loop and self.loop.is_running():
            # Schedule the coroutine to run in the existing event loop
            asyncio.create_task(self.send_message(target, message))
        else:
            # Fallback - try to get current loop
            try:
                loop = asyncio.get_event_loop()
                if loop.is_running():
                    asyncio.create_task(self.send_message(target, message))
                else:
                    loop.run_until_complete(self.send_message(target, message))
            except Exception as e:
                self.logger.error(f"Failed to send message synchronously: {e}")
    
    async def send_team_builder_pin(self, nickname, pin_code):
        """Send team builder PIN via private message."""
        message = f"🔐 Team Builder PIN: {pin_code} (expires in 10 minutes)"
        await self.send_message(nickname, message)
    
    def get_bot_stats(self):
        """Get comprehensive bot statistics."""
        uptime = datetime.now() - self.startup_time
        
        connection_stats = {}
        if self.connection_manager:
            connection_stats = self.connection_manager.get_connection_stats()
        
        return {
            "uptime": str(uptime),
            "startup_time": self.startup_time,
            "command_count": self.command_count,
            "loaded_modules": len(self.modules),
            "available_commands": len(self.command_map),
            "connection_events": len(self.connection_events),
            "connection_stats": connection_stats,
            "running": self.running
        }
    
    async def start(self):
        """Start the bot."""
        self.running = True
        
        try:
            # Initialize all components
            await self.initialize()
            
            # Start connection manager
            self.logger.info("🚀 Starting IRC connection manager...")
            await self.connection_manager.start()
            
        except Exception as e:
            self.logger.error(f"❌ Bot startup failed: {e}")
            raise
        finally:
            await self.shutdown()
    
    async def shutdown(self):
        """Gracefully shutdown the bot."""
        if self.shutdown_requested:
            return
        
        self.shutdown_requested = True
        self.logger.info("🔄 Shutting down bot...")
        
        # Stop main loop
        self.running = False
        
        # Stop connection manager
        if self.connection_manager:
            await self.connection_manager.stop()
        
        # Shutdown rate limiter
        if self.rate_limiter:
            try:
                await self.rate_limiter.shutdown()
            except Exception as e:
                self.logger.error(f"Error shutting down rate limiter: {e}")
        
        # Shutdown game engine
        if self.game_engine:
            try:
                await self.game_engine.shutdown()
            except Exception as e:
                self.logger.error(f"Error shutting down game engine: {e}")
        
        # Stop web server
        if self.web_server:
            try:
                # Web server doesn't have async shutdown, so we'll just log it
                self.logger.info("🔄 Web server shutdown (handled by thread)")
            except Exception as e:
                self.logger.error(f"Error shutting down web server: {e}")
        
        self.logger.info("✅ Bot shutdown complete")


async def main():
    """Main entry point."""
    bot = PetBotWithReconnect()
    
    # Make bot instance globally accessible for webserver
    sys.modules[__name__].bot_instance = bot
    
    # Setup signal handlers for graceful shutdown
    def signal_handler(signum, frame):
        bot.logger.info(f"Received signal {signum}, initiating shutdown...")
        asyncio.create_task(bot.shutdown())
    
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)
    
    try:
        await bot.start()
    except KeyboardInterrupt:
        bot.logger.info("🛑 Keyboard interrupt received")
    except Exception as e:
        bot.logger.error(f"❌ Bot crashed: {e}")
        import traceback
        traceback.print_exc()
    finally:
        await bot.shutdown()


if __name__ == "__main__":
    print("🐾 Starting PetBot with Auto-Reconnect...")
    try:
        asyncio.run(main())
    except KeyboardInterrupt:
        print("\n🔄 Bot stopping...")
    except Exception as e:
        print(f"❌ Fatal error: {e}")
        import traceback
        traceback.print_exc()
    finally:
        print("✅ Bot stopped")