import json
import logging
from telegram import Update, Bot
from django.http import JsonResponse
from django.views.decorators.csrf import csrf_exempt
from asgiref.sync import sync_to_async
from .models import TelegramBot
from pxy_langchain.services import LangchainAIService
from .handlers import (
    start, help_command, handle_location,
    next_truck, report_trash, private_pickup, green_balance,
    next_route, complete_stop, missed_stop, city_eco_score,
    available_jobs, accept_job, next_pickup, complete_pickup, private_eco_score
)

logger = logging.getLogger(__name__)


# -------------------------------
# 🛠 Modular local handlers inside views.py
# -------------------------------

async def handle_location_message(update):
    if update.message.location:
        await handle_location(update)
        return True
    return False

async def handle_voice_or_general_message(update):
    if update.message.voice:
        file_id = update.message.voice.file_id
        await update.message.reply_text(
            f"🎙 Recibí tu mensaje de voz con ID {file_id}. Pronto calcularé tu CO₂."
        )
        return True
    return False


async def dispatch_citizen_commands(update, text):
    if text == "/start":
        await start(update)
    elif text == "/help":
        await help_command(update)
    elif text == "/next_truck":
        await next_truck(update)
    elif text == "/report_trash":
        await report_trash(update)
    elif text == "/private_pickup":
        await private_pickup(update)
    elif text == "/green_balance":
        await green_balance(update)
    else:
        return False
    return True


async def dispatch_city_commands(update, text):
    if text == "/start":
        await start(update)
    elif text == "/help":
        await help_command(update)
    elif text == "/next_route":
        await next_route(update)
    elif text == "/complete_stop":
        await complete_stop(update)
    elif text == "/missed_stop":
        await missed_stop(update)
    elif text == "/my_eco_score":
        await city_eco_score(update)
    else:
        return False
    return True


async def dispatch_private_commands(update, text):
    if text == "/start":
        await start(update)
    elif text == "/help":
        await help_command(update)
    elif text == "/available_jobs":
        await available_jobs(update)
    elif text.startswith("/accept_job"):
        await accept_job(update)
    elif text == "/next_pickup":
        await next_pickup(update)
    elif text == "/complete_pickup":
        await complete_pickup(update)
    elif text == "/my_eco_score":
        await private_eco_score(update)
    else:
        return False
    return True


# -------------------------------
# 🌐 Main webhook
# -------------------------------

@csrf_exempt
async def telegram_webhook(request, bot_name):
    try:
        logger.info(f"Webhook called for bot: {bot_name}")

        try:
            bot_instance = await sync_to_async(TelegramBot.objects.get)(name=bot_name, is_active=True)
            logger.info(f"Loaded bot configuration: {bot_instance}")
        except TelegramBot.DoesNotExist:
            logger.error(f"Bot '{bot_name}' not found or inactive.")
            return JsonResponse({"error": f"Bot '{bot_name}' not found."}, status=400)

        if not bot_instance.assistant:
            logger.error(f"No assistant configured for bot '{bot_name}'.")
            return JsonResponse({"error": "Assistant not configured."}, status=400)

        if request.method == "POST":
            try:
                request_body = json.loads(request.body.decode("utf-8"))
                update = Update.de_json(request_body, Bot(token=bot_instance.token))
                logger.info(f"Update received: {update}")
            except json.JSONDecodeError as e:
                logger.error(f"Failed to decode JSON: {e}")
                return JsonResponse({"error": "Invalid JSON payload"}, status=400)

            if update.message:
                text = update.message.text or ""

                # Handle location always first
                if await handle_location_message(update):
                    return JsonResponse({"status": "ok"})

                # Handle voice or general simple responses next
                if await handle_voice_or_general_message(update):
                    return JsonResponse({"status": "ok"})

                # Then dispatch commands per bot
                if bot_name == "PepeBasuritaCoinsBot":
                    if await dispatch_citizen_commands(update, text):
                        return JsonResponse({"status": "ok"})
                elif bot_name == "PepeCamioncitoBot":
                    if await dispatch_city_commands(update, text):
                        return JsonResponse({"status": "ok"})
                elif bot_name == "PepeMotitoBot":
                    if await dispatch_private_commands(update, text):
                        return JsonResponse({"status": "ok"})

                # Otherwise fallback to LLM
                assistant_instance = await sync_to_async(LangchainAIService)(bot_instance.assistant)
                bot_response = await sync_to_async(assistant_instance.generate_response)(text)
                await update.message.reply_text(bot_response)

            return JsonResponse({"status": "ok"})

        logger.warning("Received non-POST request")
        return JsonResponse({"error": "Invalid request method"}, status=400)

    except Exception as e:
        logger.error(f"Error in webhook: {e}")
        return JsonResponse({"error": f"Unexpected error: {str(e)}"}, status=500)