import json
class LoginSystem:

    @staticmethod
    def login():
        with open('./files/login.txt', 'r', encoding='utf-8') as f:
            students = json.loads(f.read())
            user_id = input('请输入账号:')
            if user_id not in students.keys():
                print('没有该用户，请注册')
                return
            else:
                password = int(input('请输入密码:'))
                if password != students[user_id]:
                    print('密码错误,请重新输入！')
                    return
                else:
                    print('登录成功')

    @staticmethod
    def register():
        with open('./files/login.txt', 'r', encoding='utf-8') as f:
            students = json.loads(f.read())
            user_id = input('请输入账号:')
            password = int(input('请输入密码:'))
            if user_id in students.keys():
                print('该用户已被注册，请重新输入账号！')
                return
            else:
                print('注册成功,请登录')
        with open('./files/login.txt', 'w', encoding='utf-8') as f:
            f.write(json.dumps(students))
        print(students)
    def show_page(self):
        """展示主页"""
        while True:
            page = """
    ====================================
        🌺🌺欢迎来到千锋学生管理系统🌺🌺
    
        ♥ 1.  注册
        ♥ 2.  登录
        ♥ 3.  退出
    ======================================
            """
            print(page)
            value = int(input('请选择(1-3):'))
            if value == 1:
                # 注册
                self.register()
            elif value == 2:
                # 登录
                self.login()
            elif value == 3:
                # 退出
                exit()

sy = LoginSystem()
sy.show_page()