def add_stu():
    """
    :return: 添加的学生的信息
    """
    global nextstu_id
    global stus_information
    name = input("请输入姓名：")
    age = input("请输入年龄：")
    phone = input("请输入电话：")
    password = input("请输入登陆密码")
    if password == "":
        password = name
    # 设置初始密码为name
    if name == "":
        print("增加失败")
        return
    # 名字为空则增加失败
    str_id = "python1807" + str(nextstu_id).rjust(3, "0")
    dict1 = {"name": name, "age": age, "phone": phone, \
             "student_id": str_id, "password": password}
    print(dict1)
    print("学号为：" + str_id)
    nextstu_id += 1
    stus_information.append(dict1)
    with open("./stus_information.json", "w") as f3:
        json.dump([manage_name, manage_password, nextstu_id, stus_information], f3)
    print("增加成功")
    return dict1


def find_stu(student_name: str):
    """
    :param student_name: 名字
    :return: 查找的学生
    """
    global stus_information
    num = 0
    list2 = []
    for n in stus_information:
        if n["name"] == student_name:
            list2.append(n)
            # 得到查找的学生
            print(num, n)
            num += 1
    if num == 0:
        print("没有该学生")
    return list2


def del_stu(student: dict):
    """
    :param student：要删除的学生
    """
    global stus_information
    for s in stus_information:
        if s == student:
            stus_information.remove(student)
            with open("./stus_information.json", "w") as f3:
                json.dump([manage_name, manage_password, nextstu_id, stus_information], f3)
            print("删除成功")
            break


def change_stu(student: dict):
    """
    :param student: 要修改的学生
    """
    global stus_information
    key1 = input("请输入要修改的信息")
    if key1 not in student.keys():
        print("输入信息有误，修改失败！！！")
    elif key1 == "student_id":
        print("不能修改学号!!!")
    else:
        value1 = input("请输入修改后的值")
        for s in range(len(stus_information)):
            if stus_information[s] == student:
                stus_information[s][key1] = value1
                print(stus_information[s])
                print("修改成功")
                with open("./stus_information.json", "w") as f3:
                    json.dump([manage_name, manage_password, nextstu_id, stus_information], f3)


def manage_land():
    if manage_name == input("请输入管理员名称") \
            and manage_password == input("请输入管理员密码"):
        return True
    print("输入出错！！！")
    return False


def print_operation(s: str):
    """
    :param s:操作及其编号
    """
    num = num_interface - 5 - (len(s) - 1) + 10
    print("║" + " " * 5 + s.ljust(num) + " ║")
    # 不想解释，一个汉字占两空格，
    # bug:格式只能是：单个数字.汉字，有英文界面会乱


num_interface = 20
# 界面长度
start_interface = "╔" + "欢迎来到学生管理系统".center(num_interface, "-") + "╗"
end_interface = "╚" + "请输入执行的操作编号".center(num_interface, "-") + "╝"


# 登陆界面
def land_interface():
    """
    :return: 操作编号
    """
    print(start_interface)
    print_operation("1.学生登陆")
    # 只能修改查看自己的信息
    print_operation("2.管理员登陆")
    # 可以有所有权限
    print_operation("3.注册")
    # 加入一个新学生
    print_operation("4.退出系统")
    print(end_interface)
    operation_num = input()
    return operation_num


# 返回界面
def bank_interface():
    print(start_interface)
    print_operation("1.再次操作")
    print_operation("2.返回上一层")
    print(end_interface)
    return input()


# 修改界面
def chang_intetface():
    print(start_interface)
    print_operation("1.修改信息")
    print_operation("2.返回上一层")
    print(end_interface)
    return input()


# 管理员界面
def manage_interface():
    print(start_interface)
    print_operation("1.增加学生")
    print_operation("2.查找学生")
    print_operation("3.删除学生")
    print_operation("4.显示所有学生")
    print_operation("5.修改学生信息")
    print_operation("6.修改管理员信息")
    print_operation("7.返回上一层")
    print(end_interface)
    return input()


# 学生管理系统
import json
try:
    with open("./stus_information.json", "r") as f1:
        information = json.load(f1)
        stus_information = information[3]
        # 学生信息
        nextstu_id = information[2]
        # 下一个学生的学号
        manage_password = information[1]
        manage_name = information[0]
except:
    print("欢迎使用学生管理系统,首次登陆！！")
    manage_name = input("请设置管理员名称：")
    manage_password = input("请设置登陆密码")
    nextstu_id = 1
    stus_information = []
    with open("./stus_information.json", "w") as f2:
        json.dump([manage_name, manage_password, nextstu_id, stus_information], f2)
while 1:
    operation_num = land_interface()
    # 登陆界面
    while 1:
        # 学生登陆
        if operation_num == "1":
            my_id = input("请输入学号：")
            my_password = input("请输入密码：")
            for s in stus_information:
                if s["student_id"] == my_id and s["password"] == my_password:
                    # 验证密码和学号
                    print(s)
                    break
            # 密码错误时
            else:
                print("密码或学号错误！！！")
                operation_num1 = bank_interface()
                if operation_num1 != "1":
                    # 除1以外任意输入返回上一层
                    break
                else:
                    continue
            # 密码正确时
            operation_num1 = chang_intetface()
            # 修改学生信息
            if operation_num1 == "1":
                while 1:
                    # 循环可以多次修改信息
                    change_stu(s)
                    operation_num11 = bank_interface()
                    if operation_num11 != "1":
                        break
            break
            # 回到主界面
        # 管理员登陆
        elif operation_num == "2":
            if not manage_land():
                input("任意键返回")
                break
            while 1:
                operation_num2 = manage_interface()
                if operation_num2 == "1":
                    add_stu()
                    input("任意键退出")
                elif operation_num2 == "2":
                    name2 = input("请输入要查找的学生的姓名：")
                    find_stu(name2)
                    input("任意键退出")
                elif operation_num2 == "3":
                    name3 = input("请输入要删除的学生的姓名：")
                    students = find_stu(name3)
                    if len(students) == 0:
                        input("任意键退出")
                        continue
                    else:
                        print("请确认删除的学生，并输入对应的编号")
                        num3 = input()
                        if num3.isnumeric() and int(num3) in range(0, len(students)):
                            del_stu(students[int(num3)])
                    input("任意键退出")
                elif operation_num2 == "4":
                    if len(stus_information) == 0:
                        print("还没有学生")
                    for s in stus_information:
                        print(s)
                    input("任意键退出")
                elif operation_num2 == "5":
                    name5 = input("请入要修改学生的名字")
                    students = find_stu(name5)
                    if len(students) == 0:
                        input("任意键退出")
                        continue
                    num5 = input("请确定要修改的学生并输入编号：")
                    if num5.isnumeric() and int(num5) in range(0, len(students)):
                        num5 = int(num5)
                        while 1:
                            change_stu(students[num5])
                            operation_num3 = bank_interface()
                            if operation_num3 != "1":
                                break
                    else:
                        print("没有该学生，输入编号出错")
                elif operation_num2 == "6":
                    if not manage_land():
                        input("任意键返回")
                        continue
                    manage_name = input("请输入更改后的管理员名称：")
                    manage_password = input("请输入更改后的登陆密码")
                else:
                    break
            break
        # 注册
        elif operation_num == "3":
            add_stu()
            input("任意键退出")
            break
        # 退出系统
        else:
            exit()