import json



def login_interface():
    while True:
        print("==========================")
        print("                          ")
        print("   *歡迎來到XX管理系統(tǒng)*   ")
        print("                          ")
        print("   ?  1.登           錄   ")
        print("   ?  2.注           冊   ")
        print("   ?  3.退           出   ")
        print("==========================")
        x = input("請選擇(1-3):")
        if int(x) == 3:
            break
        elif int(x) == 1:
            with open("test.txt", "r", encoding="utf-8") as f:
                users = eval(f.read())
            user_name = input("請輸入賬號(3~6位):")
            passwork = input("請輸入密碼(6~12位):")
            if not 3 <= len(user_name) <= 6 and not 6 <= len(passwork) <= 12:
                print("登陸失敗賬號密碼長度不對，請重新登陸！")
            elif user_name not in users:
                print("此賬號沒被注冊！請重新登陸！")
            elif users[user_name] != passwork:
                print("登陸失敗！密碼不對！請重新登陸！")
            elif users[user_name] == passwork:
                print("登陸成功！")
                welcome_screen(user_name)
                break
        elif int(x) == 2:
            with open("test.txt", "r", encoding="utf-8") as f:
                users = eval(f.read())
            user_name = input("請輸入賬號(3~6位):")
            passwork = input("請輸入密碼(6~12位):")
            if not 3 <= len(user_name) <= 6 and not 6 <= len(passwork) <= 12:
                print("注冊的賬號密碼長度不對！請重新注冊")
            else:
                users[user_name] = passwork
                with open("test.txt", "w", encoding="utf-8") as f:
                    f.write(str(users))
                    print("注冊成功！請登錄")
    return "歡迎下次光臨！"


def welcome_screen(user_name):
    print("歡迎來到%s管理系統(tǒng)" % user_name)
    print("                  ")
    print("   ??·1.登陸     ")
    print("   ??·1.注冊     ")
    print("   ??·1.退出     ")
    return


print(login_interface())