import re
from datetime import datetime, timedelta
from typing import Type

from jwt import encode, decode, exceptions
from passlib.context import CryptContext
from fastapi import HTTPException, status
from sqlalchemy.orm import Session

from Log import logger
from app.config.config import settings
from app.models.user_model import UserModel, UserAppModel

SECRET_KEY = settings.secret_key
ALGORITHM = "HS256"
ACCESS_TOKEN_EXPIRE_MINUTES = 3000

pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")


def verify_password(plain_password, hashed_password):
    return pwd_context.verify(plain_password, hashed_password)


def get_password_hash(password):
    return pwd_context.hash(password)


def authenticate_user(db, username: str, password: str):
    user = db.query(UserModel).filter(UserModel.username == username).first()
    if not user:
        return False
    if not verify_password(password, user.hashed_password):
        return False
    return user


def create_access_token(data: dict, expires_delta: timedelta = None):
    to_encode = data.copy()
    if expires_delta:
        expire = datetime.utcnow() + expires_delta
    else:
        expire = datetime.utcnow() + timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
    to_encode.update({"exp": expire})
    encoded_jwt = encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
    return encoded_jwt


def decode_access_token(token: str):
    try:
        payload = decode(token, SECRET_KEY, algorithms=[ALGORITHM])
        return payload
    except exceptions.DecodeError:
        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Could not validate credentials")


def is_valid_password(password: str) -> bool:
    if len(password) <= 8:
        return False
    has_digit = re.search(r'[0-9]', password)
    has_letter = re.search(r'[A-Za-z]', password)

    # 如果密码包含数字和字母，则返回True，否则返回None
    return has_digit is not None and has_letter is not None


async def save_register_user(db, username, password, email, register_dict):
    user_id = ""
    try:
        hashed_password = pwd_context.hash(password)
        db_user = UserModel(username=username, hashed_password=hashed_password, email=email)
        pwd = db_user.encrypted_password(password)
        db_user.password = pwd
        db.add(db_user)
        db.add(db_user)
        db.commit()
        db.refresh(db_user)
        user_id = db_user.id
        for k, v in register_dict.items():
            await UserAppDao(db).update_and_insert_data(v.get("name"), pwd, v.get("email"), user_id, str(v.get("id")), k)

    except Exception as e:
        logger.error(e)
        # db.roolback()
        if user_id:
            db.query(UserModel).filter(UserModel.id == user_id).delete()
        return False
    return True


async def update_user_token(db, user_id, token_dict):
    try:
        for k, v in token_dict.items():
            await UserAppDao(db).update_user_app_data({"user_id": user_id, "app_type": k},
                                                      {"access_token": v, "token_at": datetime.now()})

    except Exception as e:
        logger.error(e)
        return False
    return True


class UserAppDao:
    def __init__(self, db: Session):
        self.db = db

    async def get_data_by_id(self, user_id: int, app_type: int) -> Type[UserAppModel] | None:
        session = self.db.query(UserAppModel).filter_by(user_id=user_id, app_type=app_type).first()
        return session

    async def update_user_app_data(self, query: dict, update_data: dict):

        logger.error("更新数据df update_app_data---------------------------")
        try:
            self.db.query(UserAppModel).filter_by(**query).update(update_data)
            self.db.commit()
        except Exception as e:
            logger.error(e)
            self.db.rollback()
            raise Exception("更新失败！")

    async def insert_user_app_data(self, username: str, password: str, email: str, user_id: int, app_id: str,
                                   app_type: int):
        logger.error("新增数据df insert_user_app_data---------------------------")
        new_session = UserAppModel(
            username=username,
            password=password,
            email=email,
            user_id=user_id,
            app_id=app_id,
            app_type=app_type,
        )
        self.db.add(new_session)
        self.db.commit()
        self.db.refresh(new_session)
        return new_session

    async def update_and_insert_data(self, username: str, password: str, email: str, user_id: int, app_id: str,
                                     app_type: int):

        logger.error("更新或者添加数据 update_and_insert_token---------------------------")
        token_boj = await self.get_data_by_id(user_id, app_type)
        if token_boj:
            await self.update_user_app_data({"id": token_boj.id}, {"username": username,
                                                                   "password": password, "email": email,
                                                                   "updated_at": datetime.now(),
                                                                   })
        else:
            await self.insert_user_app_data(username, password, email, user_id, app_id, app_type)

    async def get_user_datas(self, user_id: int):
        return self.db.query(UserAppModel).filter_by(user_id=user_id).all()