import asyncio
import os
import sys
from importlib import import_module
from os.path import exists

from ariadne import load_schema_from_path, make_executable_schema
from ariadne.asgi import GraphQL
from starlette.applications import Starlette
from starlette.middleware.cors import CORSMiddleware
from starlette.requests import Request
from starlette.responses import JSONResponse, Response
from starlette.routing import Route

from cache.precache import precache_data
from cache.revalidator import revalidation_manager
from services.exception import ExceptionHandlerMiddleware
from services.redis import redis
from services.schema import create_all_tables, resolvers
#from services.search import search_service
from services.search import search_service, initialize_search_index
from services.viewed import ViewedStorage
from services.webhook import WebhookEndpoint, create_webhook_endpoint
from settings import DEV_SERVER_PID_FILE_NAME, MODE

import_module("resolvers")
schema = make_executable_schema(load_schema_from_path("schema/"), resolvers)


async def start():
    if MODE == "development":
        if not exists(DEV_SERVER_PID_FILE_NAME):
            # pid file management
            with open(DEV_SERVER_PID_FILE_NAME, "w", encoding="utf-8") as f:
                f.write(str(os.getpid()))
    print(f"[main] process started in {MODE} mode")

async def check_search_service():
    """Check if search service is available and log result"""
    info = await search_service.info()
    if info.get("status") in ["error", "unavailable"]:
        print(f"[WARNING] Search service unavailable: {info.get('message', 'unknown reason')}")
    else:
        print(f"[INFO] Search service is available: {info}")


async def lifespan(_app):
    try:
        create_all_tables()
        await asyncio.gather(
            redis.connect(),
            precache_data(),
            ViewedStorage.init(),
            create_webhook_endpoint(),
            check_search_service(),
            start(),
            revalidation_manager.start(),
        )

        # After basic initialization is complete, fetch shouts and initialize search
        from services.db import fetch_all_shouts  # Import your database access function
        all_shouts = await fetch_all_shouts()  # Replace with your actual function
        await initialize_search_index(all_shouts)

        yield
    finally:
        tasks = [redis.disconnect(), ViewedStorage.stop(), revalidation_manager.stop()]
        await asyncio.gather(*tasks, return_exceptions=True)


# Создаем экземпляр GraphQL
graphql_app = GraphQL(schema, debug=True)


# Оборачиваем GraphQL-обработчик для лучшей обработки ошибок
async def graphql_handler(request: Request):
    if request.method not in ["GET", "POST"]:
        return JSONResponse({"error": "Method Not Allowed"}, status_code=405)

    try:
        result = await graphql_app.handle_request(request)
        if isinstance(result, Response):
            return result
        return JSONResponse(result)
    except asyncio.CancelledError:
        return JSONResponse({"error": "Request cancelled"}, status_code=499)
    except Exception as e:
        print(f"GraphQL error: {str(e)}")
        return JSONResponse({"error": str(e)}, status_code=500)


# Обновляем маршрут в Starlette
app = Starlette(
    routes=[
        Route("/", graphql_handler, methods=["GET", "POST"]),
        Route("/new-author", WebhookEndpoint),
    ],
    lifespan=lifespan,
    debug=True,
)

app.add_middleware(ExceptionHandlerMiddleware)
if "dev" in sys.argv:
    app.add_middleware(
        CORSMiddleware,
        allow_origins=["https://localhost:3000"],
        allow_credentials=True,
        allow_methods=["*"],
        allow_headers=["*"],
    )