"""Main private handlers module for Telegram bot"""

# Standard library imports
import asyncio
from datetime import datetime

# Third-party imports
from aiogram import types, Router, F
from aiogram.filters import Command, StateFilter
from aiogram.fsm.context import FSMContext

# Local imports - filters and middlewares
from database.async_db import AsyncBotDB
from helper_bot.filters.main import ChatTypeFilter
from helper_bot.middlewares.album_middleware import AlbumMiddleware
from helper_bot.middlewares.blacklist_middleware import BlacklistMiddleware

# Local imports - utilities
from helper_bot.keyboards import get_reply_keyboard, get_reply_keyboard_for_post
from helper_bot.keyboards.keyboards import get_reply_keyboard_leave_chat
from helper_bot.utils import messages
from helper_bot.utils.helper_func import (
    get_first_name, 
    update_user_info, 
    check_user_emoji
)

# Local imports - metrics
from helper_bot.utils.metrics import (
    track_time, 
    track_errors,
    db_query_time
)

# Local imports - modular components
from .constants import FSM_STATES, BUTTON_TEXTS, ERROR_MESSAGES
from .services import BotSettings, UserService, PostService, StickerService
from .decorators import error_handler

# Expose sleep for tests (tests patch helper_bot.handlers.private.private_handlers.sleep)
sleep = asyncio.sleep


class PrivateHandlers:
    """Main handler class for private messages"""
    
    def __init__(self, db: AsyncBotDB, settings: BotSettings, s3_storage=None):
        self.db = db
        self.settings = settings
        self.user_service = UserService(db, settings)
        self.post_service = PostService(db, settings, s3_storage)
        self.sticker_service = StickerService(settings)
        
        self.router = Router()
        self.router.message.middleware(AlbumMiddleware(latency=5.0))
        self.router.message.middleware(BlacklistMiddleware())
        
        # Register handlers
        self._register_handlers()
    
    def _register_handlers(self):
        """Register all message handlers"""
        # Command handlers
        self.router.message.register(self.handle_emoji_message, ChatTypeFilter(chat_type=["private"]), Command("emoji"))
        self.router.message.register(self.handle_restart_message, ChatTypeFilter(chat_type=["private"]), Command("restart"))
        self.router.message.register(self.handle_start_message, ChatTypeFilter(chat_type=["private"]), Command("start"))
        self.router.message.register(self.handle_start_message, ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["RETURN_TO_BOT"])
        
        # Button handlers
        self.router.message.register(self.suggest_post, StateFilter(FSM_STATES["START"]), ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["SUGGEST_POST"])
        self.router.message.register(self.end_message, ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["SAY_GOODBYE"])
        self.router.message.register(self.end_message, ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["LEAVE_CHAT"])
        self.router.message.register(self.stickers, ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["WANT_STICKERS"])
        self.router.message.register(self.connect_with_admin, StateFilter(FSM_STATES["START"]), ChatTypeFilter(chat_type=["private"]), F.text == BUTTON_TEXTS["CONNECT_ADMIN"])

        
        # State handlers
        self.router.message.register(self.suggest_router, StateFilter(FSM_STATES["SUGGEST"]), ChatTypeFilter(chat_type=["private"]))
        self.router.message.register(self.resend_message_in_group_for_message, StateFilter(FSM_STATES["PRE_CHAT"]), ChatTypeFilter(chat_type=["private"]))
        self.router.message.register(self.resend_message_in_group_for_message, StateFilter(FSM_STATES["CHAT"]), ChatTypeFilter(chat_type=["private"]))

    @error_handler
    @track_errors("private_handlers", "handle_emoji_message")
    @track_time("handle_emoji_message", "private_handlers")
    async def handle_emoji_message(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle emoji command"""
        await self.user_service.log_user_message(message)
        user_emoji = await check_user_emoji(message)
        await state.set_state(FSM_STATES["START"])
        if user_emoji is not None:
            await message.answer(f'Твоя эмодзя - {user_emoji}', parse_mode='HTML')
    
    @error_handler
    @track_errors("private_handlers", "handle_restart_message")
    @track_time("handle_restart_message", "private_handlers")
    async def handle_restart_message(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle restart command"""
        markup = await get_reply_keyboard(self.db, message.from_user.id)
        await self.user_service.log_user_message(message)
        await state.set_state(FSM_STATES["START"])
        await update_user_info('love', message)
        await check_user_emoji(message)
        await message.answer('Я перезапущен!', reply_markup=markup, parse_mode='HTML')
    
    @error_handler
    @track_errors("private_handlers", "handle_start_message")
    @track_time("handle_start_message", "private_handlers")
    async def handle_start_message(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle start command and return to bot button with metrics tracking"""
        # User service operations with metrics
        await self.user_service.log_user_message(message)
        await self.user_service.ensure_user_exists(message)
        await state.set_state(FSM_STATES["START"])
        
        # Send sticker with metrics
        await self.sticker_service.send_random_hello_sticker(message)
        
        # Send welcome message with metrics
        markup = await get_reply_keyboard(self.db, message.from_user.id)
        hello_message = messages.get_message(get_first_name(message), 'HELLO_MESSAGE')
        await message.answer(hello_message, reply_markup=markup, parse_mode='HTML')
    
    @error_handler
    @track_errors("private_handlers", "suggest_post")
    @track_time("suggest_post", "private_handlers")
    async def suggest_post(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle suggest post button"""
        # User service operations with metrics
        await self.user_service.update_user_activity(message.from_user.id)
        await self.user_service.log_user_message(message)
        await state.set_state(FSM_STATES["SUGGEST"])
        
        markup = types.ReplyKeyboardRemove()
        suggest_news = messages.get_message(get_first_name(message), 'SUGGEST_NEWS')
        await message.answer(suggest_news, reply_markup=markup)
    
    @error_handler
    @track_errors("private_handlers", "end_message")
    @track_time("end_message", "private_handlers")
    async def end_message(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle goodbye button"""
        # User service operations with metrics
        await self.user_service.update_user_activity(message.from_user.id)
        await self.user_service.log_user_message(message)
        
        # Send sticker
        await self.sticker_service.send_random_goodbye_sticker(message)
        
        # Send goodbye message
        markup = types.ReplyKeyboardRemove()
        bye_message = messages.get_message(get_first_name(message), 'BYE_MESSAGE')
        await message.answer(bye_message, reply_markup=markup)
        await state.set_state(FSM_STATES["START"])
    
    @error_handler
    @track_errors("private_handlers", "suggest_router")
    @track_time("suggest_router", "private_handlers")
    async def suggest_router(self, message: types.Message, state: FSMContext, album: list = None, **kwargs):
        """Handle post submission in suggest state"""
        # Проверяем, есть ли механизм для получения полной медиагруппы (для медиагрупп)
        album_getter = kwargs.get("album_getter")
        
        if album_getter and message.media_group_id:
            # Это медиагруппа - сразу отвечаем пользователю, обработку делаем в фоне
            markup_for_user = await get_reply_keyboard(self.db, message.from_user.id)
            success_send_message = messages.get_message(get_first_name(message), 'SUCCESS_SEND_MESSAGE')
            await message.answer(success_send_message, reply_markup=markup_for_user)
            await state.set_state(FSM_STATES["START"])
            
            # В фоне ждем полную медиагруппу и обрабатываем пост
            async def process_media_group_background():
                try:
                    # Ждем полную медиагруппу
                    full_album = await album_getter.get_album(timeout=10.0)
                    if not full_album:
                        return
                    
                    # Обрабатываем пост с полной медиагруппой
                    await self.user_service.update_user_activity(message.from_user.id)
                    await self.post_service.process_post(message, full_album)
                except Exception as e:
                    from logs.custom_logger import logger
                    logger.error(f"Ошибка при фоновой обработке медиагруппы: {e}")
            
            asyncio.create_task(process_media_group_background())
        else:
            # Обычное сообщение или медиагруппа уже собрана - обрабатываем синхронно
            await self.user_service.update_user_activity(message.from_user.id)
            if message.media_group_id is None:
                await self.user_service.log_user_message(message)
            await self.post_service.process_post(message, album)
            markup_for_user = await get_reply_keyboard(self.db, message.from_user.id)
            success_send_message = messages.get_message(get_first_name(message), 'SUCCESS_SEND_MESSAGE')
            await message.answer(success_send_message, reply_markup=markup_for_user)
            await state.set_state(FSM_STATES["START"])
    
    @error_handler
    @track_errors("private_handlers", "stickers")
    @track_time("stickers", "private_handlers")
    @db_query_time("stickers", "stickers", "update")
    async def stickers(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle stickers request"""
        # User service operations with metrics
        markup = await get_reply_keyboard(self.db, message.from_user.id)
        await self.db.update_stickers_info(message.from_user.id)
        await self.user_service.log_user_message(message)
        await message.answer(
            text=ERROR_MESSAGES["STICKERS_LINK"],
            reply_markup=markup
        )
        await state.set_state(FSM_STATES["START"])
    
    @error_handler
    @track_errors("private_handlers", "connect_with_admin")
    @track_time("connect_with_admin", "private_handlers")
    async def connect_with_admin(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle connect with admin button"""
        # User service operations with metrics
        await self.user_service.update_user_activity(message.from_user.id)
        admin_message = messages.get_message(get_first_name(message), 'CONNECT_WITH_ADMIN')
        await message.answer(admin_message, parse_mode="html")
        await self.user_service.log_user_message(message)
        await state.set_state(FSM_STATES["PRE_CHAT"])
    
    @error_handler
    @track_errors("private_handlers", "resend_message_in_group_for_message")
    @track_time("resend_message_in_group_for_message", "private_handlers")
    @db_query_time("resend_message_in_group_for_message", "messages", "insert")
    async def resend_message_in_group_for_message(self, message: types.Message, state: FSMContext, **kwargs):
        """Handle messages in admin chat states"""
        # User service operations with metrics
        await self.user_service.update_user_activity(message.from_user.id)
        await message.forward(chat_id=self.settings.group_for_message)
        
        current_date = datetime.now()
        date = int(current_date.timestamp())
        await self.db.add_message(message.text, message.from_user.id, message.message_id + 1, date)
        
        question = messages.get_message(get_first_name(message), 'QUESTION')
        user_state = await state.get_state()
        
        if user_state == FSM_STATES["PRE_CHAT"]:
            markup = await get_reply_keyboard(self.db, message.from_user.id)
            await message.answer(question, reply_markup=markup)
            await state.set_state(FSM_STATES["START"])
        elif user_state == FSM_STATES["CHAT"]:
            markup = get_reply_keyboard_leave_chat()
            await message.answer(question, reply_markup=markup)


# Factory function to create handlers with dependencies
def create_private_handlers(db: AsyncBotDB, settings: BotSettings, s3_storage=None) -> PrivateHandlers:
    """Create private handlers instance with dependencies"""
    return PrivateHandlers(db, settings, s3_storage)


# Legacy router for backward compatibility
private_router = Router()

# Initialize with global dependencies (for backward compatibility)
def init_legacy_router():
    """Initialize legacy router with global dependencies"""
    global private_router
    
    from helper_bot.utils.base_dependency_factory import get_global_instance
    
    bdf = get_global_instance()
    settings = BotSettings(
        group_for_posts=bdf.settings['Telegram']['group_for_posts'],
        group_for_message=bdf.settings['Telegram']['group_for_message'],
        main_public=bdf.settings['Telegram']['main_public'],
        group_for_logs=bdf.settings['Telegram']['group_for_logs'],
        important_logs=bdf.settings['Telegram']['important_logs'],
        preview_link=bdf.settings['Telegram']['preview_link'],
        logs=bdf.settings['Settings']['logs'],
        test=bdf.settings['Settings']['test']
    )
    
    db = bdf.get_db()
    s3_storage = bdf.get_s3_storage()
    handlers = create_private_handlers(db, settings, s3_storage)
    
    # Instead of trying to copy handlers, we'll use the new router directly
    # This maintains backward compatibility while using the new architecture
    private_router = handlers.router

# Initialize legacy router
init_legacy_router()