import logging
from functools import wraps

from aiohttp import ClientSession
from starlette.exceptions import HTTPException

from services.core import get_author_by_user
from settings import AUTH_URL


logger = logging.getLogger('[services.auth] ')
logger.setLevel(logging.DEBUG)


async def check_auth(req) -> str | None:
    logger.debug('checking auth...')
    user_id = ''
    try:
        token = req.headers.get('Authorization')
        if token:
            # Logging the authentication token
            query_name = 'validate_jwt_token'
            operation = 'ValidateToken'
            headers = {
                'Content-Type': 'application/json',
            }

            variables = {
                'params': {
                    'token_type': 'access_token',
                    'token': token,
                }
            }

            gql = {
                'query': f'query {operation}($params: ValidateJWTTokenInput!) {{ {query_name}(params: $params) {{ is_valid claims }} }}',
                'variables': variables,
                'operationName': operation,
            }
            # Asynchronous HTTP request to the authentication server
            async with ClientSession() as session:
                async with session.post(
                    AUTH_URL, json=gql, headers=headers
                ) as response:
                    if response.status == 200:
                        data = await response.json()
                        errors = data.get('errors')
                        if errors:
                            logger.error(f'{errors}')
                        else:
                            user_id = (
                                data.get('data', {})
                                .get(query_name, {})
                                .get('claims', {})
                                .get('sub')
                            )
                            logger.info(f'got user_id: {user_id}')
                            return user_id
    except Exception as e:
        # Handling and logging exceptions during authentication check
        logger.error(e)

    if not user_id:
        raise HTTPException(status_code=401, detail='Unauthorized')


def login_required(f):
    @wraps(f)
    async def decorated_function(*args, **kwargs):
        info = args[1]
        context = info.context
        req = context.get('request')
        user_id = await check_auth(req)
        if user_id:
            context['user_id'] = user_id.strip()
            author = get_author_by_user(user_id)
            if author and 'id' in author:
                context['author_id'] = author['id']
            else:
                logger.debug(author)
                HTTPException(status_code=401, detail='Unauthorized')
        return await f(*args, **kwargs)

    return decorated_function