#!/usr/bin/env python
# -*- encoding: utf-8 -*-
'''
@Date:2022/07/18 16:44:57
'''
import sys

import sqlalchemy
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
    
    # 用户密码修改
    def update_password(self, user_info, old_password, new_password):
        if user_info.check_password(old_password):
            user_info.set_password(new_password)
            self.update(user_info)
            return True, self.get_jwt(user_info)
        else:
            return False, "旧密码错误"
    
    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'))
    
    # 用户管理
    def get_seach_user_list(self, user_code, real_name, role_name, is_enabled, page_param):
        filter_base = ""
        if user_code:
            filter_base += f" user_code like '%{user_code}%'"
        if real_name:
            if filter_base:
                filter_base += " and "
            filter_base += f" real_name like '%{real_name}%' "
        if role_name:
            if filter_base:
                filter_base += " and "
            filter_base += f" role_name like '%{role_name}%'"
        if is_enabled:
            if filter_base:
                filter_base += " and "
            filter_base += f" is_enabled={is_enabled}"
        if filter_base:
            filter_base = f" where {filter_base}"
        sql_all = f"""
        select * from rms_user {filter_base} order by create_date desc
        """
        try:
            count_number = len(self.execute(sql_all).fetchall())
        except Exception:
            count_number = 0
        page_param.totalRecords = count_number
        sql_page = Utils.sql_paging_assemble(sql_all, page_param)
        return self.execute(sql_page).fetchall()



    # #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)