#!/usr/bin/env python
# -*- encoding: utf-8 -*-
'''
@Date:2022/07/18 16:44:57
'''
import sys
sys.path.append(".")
import jwt
import base64
import datetime
from flask import current_app
from sqlalchemy import and_, insert, or_, desc
from db_logic.db_base import Repository
from models.user_models import EntityUser
from Common.Utils import Utils

#用户操作业务逻辑类
class BllUser(Repository):

    def __init__(self, entityType=EntityUser):
        return super().__init__(entityType)

    #用户账号密码登录
    def login(self, user_name, password):
        user_info = self.findEntity(EntityUser.account == user_name)
        if user_info:
            if user_info.is_enabled:
                if user_info.check_password(password):
                    return self.get_jwt(user_info)
        return False
    
    def get_jwt(self,  obj, expires_in=36000):
        '''用户登录后，发放有效的 JWT'''
        now = datetime.datetime.now()
        payload = {
            'user_id': obj.user_id,
            'user_name': obj.role_name,
            'user_avatar': obj.avatar_url,
            'exp': now + datetime.timedelta(seconds=expires_in),
            'iat': now
        }
        return jwt.encode(
            payload,
            current_app.config['SECRET_KEY'],
            algorithm='HS256')

    def verify_jwt(self, token):
        '''验证 JWT 的有效性'''
        try:
            payload = jwt.decode(
                token,
                current_app.config['SECRET_KEY'],
                algorithms=['HS256'])
        except (jwt.exceptions.ExpiredSignatureError,
                jwt.exceptions.InvalidSignatureError,
                jwt.exceptions.DecodeError) as e:
            # Token过期，或被人修改，那么签名验证也会失败
            return None
        # return User.query.get(payload.get('user_id'))
        return self.findEntity(payload.get('user_id'))



    #根据条码获取用户
    def getUserByBarCode(self, barCode):
        return self.findEntity(EntityUser.BarCode == barCode)

    #获取用户列表
    def getUserList(self, customerId, pageParam, keyWord=''):
        keyWord = '%' + keyWord + '%'
        orm_query = self.findList().filter(EntityUser.CustomerId == customerId
                                           ).filter(or_(EntityUser.UserCode.like(keyWord), EntityUser.RealName.like(keyWord))).order_by(desc(EntityUser.CreateDate))
        return self.queryPage(orm_query, pageParam)

    #获取用户详情信息
    def getUserInfo(self, userId):
        return self.findEntity(userId)