import telebot
from telebot import types
import os
import json
from datetime import datetime, timedelta
from typing import List, Dict, Optional
from celery import Celery
import random

celery = Celery(
    'tasks',
    broker=os.getenv("CELERY_BROKER_URL", "redis://localhost:6379/0"),
    backend=os.getenv("CELERY_RESULT_BACKEND", "redis://localhost:6379/0"),
)

class BotService:
    def __init__(self, token: str, chat_id: str):
        self.bot = telebot.TeleBot(token)
        self.chat_id = chat_id

        # Register handlers
        self._register_handlers()

        # Store pending schedules
        self.pending_schedules: List[Dict] = []

    def _register_handlers(self):
        """Register message handlers."""

        @self.bot.message_handler(commands=['start', 'help'])
        def send_welcome(message):
            self.bot.reply_to(
                message,
                "📚 Sistema RAG Espiritismo\n\n"
                "Comandos disponíveis:\n"
                "/start - Iniciar\n"
                "/help - Ajuda\n"
                "/status - Ver status\n"
                "/books - Listar livros\n"
            )

        @self.bot.message_handler(commands=['status'])
        def send_status(message):
            status_text = f"""
📚 Status do Sistema RAG Espiritismo

Bot: Ativo
Chat ID: {self.chat_id}

Direcione uma pergunta sobre espiritismo para eu responder!
"""
            self.bot.reply_to(message, status_text)

        @self.bot.message_handler(commands=['books'])
        def list_books(message):
            books = [
                "📖 Livros disponíveis:\n\n",
                "• A Gênese (Allan Kardec)\n",
                "• Livro dos Espíritos (Allan Kardec)\n",
                "• Livro dos Médiums (Allan Kardec)\n",
                "• O Céu e o Inferno (Manuel Quintão)\n",
                "• O Evangelho Segundo o Espiritismo (Allan Kardec)\n",
                "• O Que é o Espiritismo (Allan Kardec)\n"
            ]
            self.bot.reply_to(message, "".join(books))

        @self.bot.message_handler(func=lambda msg: True)
        def handle_question(message):
            """Handle user questions."""
            question = message.text

            # Send loading indicator
            self.bot.reply_to(
                message,
                "🔍 Processando sua pergunta..."
            )

            # Send to RAG service asynchronously
            self._query_rag_service(question, message.chat.id)

    def _query_rag_service(self, question: str, chat_id: int):
        """Query RAG service and send response."""
        try:
            from app.services.rag_service import RAGService
            from app.services.qdrant_service import QdrantService

            qdrant = QdrantService(os.getenv("QDRANT_URL", "http://qdrant:6333"))
            rag = RAGService(qdrant, model_name=os.getenv("GPT4ALL_MODEL", "llama-3.2-3b-instruct-q4_0.gguf"))

            result = rag.query(question, top_k=3)

            # Format response
            response_text = f"""
✅ Resposta:\n\n{result['response']}

📚 Fontes:
{self._format_sources(result['sources'])}
"""

            self.bot.send_message(chat_id, response_text)

        except Exception as e:
            self.bot.send_message(
                chat_id,
                f"❌ Erro ao processar sua pergunta: {str(e)}"
            )

    def _format_sources(self, sources: List[Dict]) -> str:
        """Format source metadata."""
        formatted = []
        for source in sources:
            meta = source.get('metadata', {})
            title = meta.get('title', 'Desconhecido')
            chunk = meta.get('chunk_id', '?')
            formatted.append(f"• {title} (chunk {chunk})")
        return "\n".join(formatted)

    def add_schedule(self, schedule: Dict):
        """Add schedule to pending list and database."""
        self.pending_schedules.append(schedule)
        self._save_schedules()

    def update_schedule(self, schedule: Dict):
        """Update schedule in pending list and database."""
        for i, s in enumerate(self.pending_schedules):
            if s['id'] == schedule['id']:
                self.pending_schedules[i] = schedule
                break
        self._save_schedules()

    def remove_schedule(self, schedule: Dict):
        """Remove schedule from pending list and database."""
        self.pending_schedules = [s for s in self.pending_schedules if s['id'] != schedule['id']]
        self._save_schedules()

    def _save_schedules(self):
        """Save schedules to JSON file."""
        schedules_path = "/app/schedules.json"

        # Load existing schedules
        schedules = []
        if os.path.exists(schedules_path):
            with open(schedules_path, "r") as f:
                schedules = json.load(f)

        # Update pending schedules
        for pending in self.pending_schedules:
            found = False
            for i, s in enumerate(schedules):
                if s['id'] == pending['id']:
                    schedules[i] = pending
                    found = True
                    break
            if not found:
                schedules.append(pending)

        # Write back
        with open(schedules_path, "w") as f:
            json.dump(schedules, f, indent=2)

    def start_polling(self):
        """Start the bot polling."""
        print("Starting Telegram bot polling...")
        self.bot.infinity_polling(timeout=10, long_polling_timeout=5)

    @celery.task
    def send_scheduled_message(self, schedule: Dict):
        """Send scheduled message to Telegram."""
        try:
            response = rag.query(schedule.get('book', ''), top_k=3)
            message = f"""
⏰ Mensagem Agendada - {schedule.get('book', 'Todos os livros')}

{response['response']}

📚 Fontes:
{self._format_sources(response['sources'])}
"""
            self.bot.send_message(self.chat_id, message)
        except Exception as e:
            print(f"Error sending scheduled message: {e}")

    @celery.task
    def generate_daily_content(self):
        """Generate daily content for all books."""
        books = [
            "A Gênese",
            "Livro dos Espíritos",
            "Livro dos Médiums",
            "O Céu e o Inferno",
            "O Evangelho Segundo o Espiritismo",
            "O Que é o Espiritismo"
        ]

        selected_books = random.sample(books, 2)
        book_names = "\n".join(f"• {book}" for book in selected_books)

        message = f"""
🌟 Conteúdo Diário de Espiritismo

📚 Livros selecionados:
{book_names}

Este conteúdo foi gerado automaticamente pelo Sistema RAG Espiritismo.
"""

        self.bot.send_message(self.chat_id, message)