#!/usr/bin/env python3
# -*- coding: utf-8 -*-
from datetime import timedelta

from app.admin.schema.intent_org import CurrentIntentOrgIns
from fastapi import Depends, Request
from fastapi.security import HTTPBearer
from fastapi.security.utils import get_authorization_scheme_param
from jose import ExpiredSignatureError, JWTError, jwt
from pydantic_core import from_json
from sqlalchemy.ext.asyncio import AsyncSession

from common.log import log
from model.intent_org import IntentOrg
from common.dataclasses import AccessToken, NewToken, RefreshToken
from common.exception.errors import AuthorizationError, TokenError
from core.conf import settings
from database.db_mysql import async_db_session
from database.db_redis import redis_client
from utils.serializers import select_as_dict
from utils.timezone import timezone

# JWT authorizes dependency injection
DependsJwtAuth = Depends(HTTPBearer())


async def create_access_token(sub: str) -> AccessToken:
    """
    Generate encryption token

    :param sub: The subject/userid of the JWT
    :param multi_login: multipoint login for user
    :return:
    """
    expire = timezone.now() + timedelta(seconds=settings.TOKEN_EXPIRE_SECONDS)

    to_encode = {'exp': expire, 'sub': sub}
    access_token = jwt.encode(to_encode, settings.TOKEN_SECRET_KEY, settings.TOKEN_ALGORITHM)

    return AccessToken(access_token=access_token, access_token_expire_time=expire)


def get_token(request: Request) -> str:
    """
    Get token for request header

    :return:
    """
    authorization = request.headers.get('Authorization')
    scheme, token = get_authorization_scheme_param(authorization)
    if not authorization or scheme.lower() != 'bearer':
        raise TokenError(msg='Token 无效')
    return token


def jwt_decode(token: str) -> int:
    """
    Decode token

    :param token:
    :return:
    """
    try:
        payload = jwt.decode(token, settings.TOKEN_SECRET_KEY, algorithms=[settings.TOKEN_ALGORITHM])
        user_id = int(payload.get('sub'))
        if not user_id:
            raise TokenError(msg='Token 无效')
    except ExpiredSignatureError:
        raise TokenError(msg='Token 已过期')
    except (JWTError, Exception):
        raise TokenError(msg='Token 无效')
    return user_id


async def get_current_organization(db: AsyncSession, pk: str) -> IntentOrg:
    """
    Get the current user through token

    :param db:
    :param pk:
    :return:
    """
    from app.admin.crud.crud_intent_org import intent_org_dao
    org = await intent_org_dao.get_by_token(db, pk)
    if not org:
        raise TokenError(msg='Token 无效')
    if org.status is not 1:
        raise AuthorizationError(msg='用户已被锁定，请联系系统管理员')

    return org


async def jwt_call_center_authentication(token: str) -> CurrentIntentOrgIns:
    """
    JWT authentication

    :param token:
    :return:
    """
    org_id = jwt_decode(token)
    key = f'{settings.TOKEN_CALL_REDIS_PREFIX}:{org_id}'
    token_verify = await redis_client.get(key)
    if not token_verify:
        async with async_db_session() as db:
            current_org = await get_current_organization(db, token)
            org = CurrentIntentOrgIns(**select_as_dict(current_org))
            await redis_client.setex(
                key,
                settings.JWT_USER_REDIS_EXPIRE_SECONDS,
                org.model_dump_json(),
            )
    else:
        # TODO: 在恰当的时机，应替换为使用 model_validate_json
        # https://docs.pydantic.dev/latest/concepts/json/#partial-json-parsing
        org = CurrentIntentOrgIns.model_validate(from_json(token_verify, allow_partial=True))
    return org