using System.Text;
using System.Text.Json;

namespace Test;

public static class Program
{
    private static CliStatus status;
    private static Company? company;
    private static JsonSerializerOptions jsonSerializerOptions = new JsonSerializerOptions { IncludeFields = true };
    private enum CliStatus
    {
        Init,
        Loaded,
        Exit
    }


    public static void Main(string[] args)
    {
        status = CliStatus.Init;
        do
        {
            switch (status)
            {
                case CliStatus.Init:
                    init();
                    break;
                case CliStatus.Loaded:
                    menu();
                    break;

            }
        } while (status != CliStatus.Exit);
    }

    private static void menu()
    {
        bool success = false;

        do
        {
            Console.WriteLine("""
                          菜单：
                          q):退出
                          1):添加一个职工
                          2):列举所有职工
                          3):删除职工
                          4):修改职工信息
                          5):查找职工
                          6):排序
                          7):清空当前Company的内容
                          8):将当前company保存到company.json
                          """);

            var option = Console.ReadKey().KeyChar;

            Console.WriteLine("");

            switch (option)
            {
                case 'q':
                    status = CliStatus.Exit;
                    success = true;
                    break;
                case '1':
                    success = company!.TryAddStaff();
                    break;
                case '2':
                    Console.WriteLine(company!.GetStaffs());
                    success = true;
                    break;
                case '3':
                    success = company!.TryRemoveStaff();
                    break;
                case '4':
                    success = company!.TryModifyStaff();
                    break;
                case '5':
                    success = company!.TrySearchStaff();
                    break;
                case '6':
                    // 很明显已经是屎山了
                    Console.WriteLine("是否要按id降序排序，是输入yes，否则视为不是");
                    if (Console.ReadLine() == "yes")
                        company!.Order(true);
                    else
                        company!.Order(false);

                    success = true;
                    break;
                case '7':
                    Console.WriteLine("确定操作请输入yes");
                    if (Console.ReadLine() == "yes")
                    {
                        company = new Company();
                    }
                    else
                    {
                        Console.WriteLine("操作取消");
                    }
                    success = true;
                    break;
                case '8':
                    var content = JsonSerializer.Serialize(company, jsonSerializerOptions);

                    using (StreamWriter writer = new StreamWriter("company.json", false, Encoding.UTF8))
                    {
                        writer.Write(content);
                    }
                    success = true;
                    break;
                default:
                    Console.WriteLine("选择无效，请重新选择");
                    break;
            }

            if (!success)
                Console.WriteLine("操作失败");

        } while (!success);
    }

    private static void init()
    {
        bool success = false;

        Console.WriteLine("""
                          选择一个初始化的方法：
                          1):从company.json读取
                          2):创建一个新Company对象
                          """);

        do
        {
            var option = Console.ReadKey().KeyChar;

            switch (option)
            {
                case '1':
                    success = loadFromFile();
                    break;
                case '2':
                    company = new Company();
                    success = true;
                    break;
                default:
                    Console.WriteLine("");
                    Console.WriteLine("选择无效，请重新选择");
                    break;
            }
        } while (!success);

        status = CliStatus.Loaded;
    }

    private static bool loadFromFile()
    {
        if (!File.Exists("company.json"))
        {
            Console.WriteLine("");
            Console.WriteLine("未找到company.json");
            return false;
        }

        try
        {
            using var fs = new FileStream("company.json", FileMode.Open);
            company = JsonSerializer.Deserialize<Company>(fs);
        }
        // catch (FileNotFoundException)
        // {
        //     Console.WriteLine("未找到company.json");
        //     return false;
        // }
        catch (JsonException)
        {
            Console.WriteLine("company.json的数据无效");
            return false;
        }
        return true;
    }
}

using System.Text;
using System.Text.Json.Serialization;

namespace Test;

internal class Company
{
    // 暂时先用List<T>吧
    // private List<Department> departments = new();
    [JsonInclude]
    private List<Staff> staffs = new();

    public string GetStaffs()
    {
        StringBuilder sb = new StringBuilder();
        foreach (var staff in staffs)
        {
            sb.Append(staff);
            sb.Append(Environment.NewLine);
        }

        return sb.ToString();
    }

    public void AddStaff(Staff staff)
    {
        if (staffs.Contains(staff))
            throw new ArgumentException($"The {staff.Name} had already been added.");
        // if (!departments.Contains(staff.Department!))
        //     throw new ArgumentException(
        //         $"The {staff.Name} in {staff.Department}, whose department not in this company currently.");
        // if (staff.Department is not null)
        //     if (!departments.Contains(staff.Department))
        //         departments.Add(staff.Department);
        if (staffs.Find(s => s.Id == staff.Id) is not null)
            throw new ArgumentException($"The {staff.Name} have a duplicate ID.");

        staffs.Add(staff);
    }

    // public void RemoveStaff(Staff staff)
    // {
    //     if (!staffs.Contains(staff))
    //         throw new ArgumentException($"The {staff.Name} had already been added.");

    //     staffs.Remove(staff);
    // }

    public void RemoveStaff(int staffId)
    {
        var staff = staffs.Find(staff => staff.Id == staffId) ?? throw new ArgumentException($"Couldn't find a staff has ID {staffId}");

        staffs.Remove(staff);
    }

    public Staff? SearchStaff(int staffId)
    {
        return staffs.Find(staff => staff.Id == staffId);
    }

    // public Staff? SearchStaff(string staffName)
    // {
    //     return staffs.Find(staff => staff.Name == staffName);
    // }

    public void Order(bool descending)
    {
        if (descending)
        {
            staffs.Sort((x, y) => y.Id.CompareTo(x.Id));
        }
        else
        {
            staffs.Sort((x, y) => x.Id.CompareTo(y.Id));
        }
    }

}

namespace Test;

internal static class CompanyExtension
{
    internal static bool TryAddStaff(this Company company)
    {
        bool inputValid = false;

        Console.WriteLine("""
                          输入职工信息，以空格分隔
                          姓名 编号 职工类型 部门
                          """);

        do
        {
            var input = (Console.ReadLine() ?? string.Empty).Split(' ');

            if (input.Length == 4)
            {
                string name = input[0];
                bool idParse = int.TryParse(input[1], out var id);
                bool staffTypeParse = Enum.TryParse(typeof(StaffType), input[2], out var staffType);
                string department = input[3];

                if (idParse && staffTypeParse)
                {
                    StaffType staffsType = (StaffType)staffType!;
                    var staff = new Staff(name, id, staffsType, department);
                    // 梅开二度屎山
                    try
                    {
                        company.AddStaff(staff);
                    }
                    catch (ArgumentException)
                    {
                        return false;
                    }
                    inputValid = true;
                }
            }

            if (!inputValid)
                Console.WriteLine("输入无效，请重新输入");

        } while (!inputValid);
        return true;
    }

    internal static bool TryRemoveStaff(this Company company)
    {
        bool inputValid = false;

        Console.WriteLine("输入要删除的职工id");

        do
        {
            var input = Console.ReadLine() ?? string.Empty;

            if (int.TryParse(input, out var id))
            {
                inputValid = true;

                if (company.SearchStaff(id) is null)
                {
                    Console.WriteLine("不存在指定的职工");
                    return false;
                }
                company.RemoveStaff(id);
            }

            if (!inputValid)
                Console.WriteLine("输入无效，请重新输入");

        } while (!inputValid);

        return true;
    }

    internal static bool TryModifyStaff(this Company company)
    {
        bool inputValid = false;
        bool inputInfoVaild = false;

        Console.WriteLine("输入要修改的职工个人信息的id");

        do
        {
            var input = (Console.ReadLine() ?? string.Empty);

            if (int.TryParse(input, out var id))
            {
                inputValid = true;

                var staff = company.SearchStaff(id);

                if (staff is null)
                {
                    Console.WriteLine("不存在指定的职工");
                    return false;
                }

                Console.WriteLine("""
                                  输入职工信息，以空格分隔
                                  姓名 职工类型 部门
                                  """);

                do
                {
                    var info = (Console.ReadLine() ?? string.Empty).Split(' ');

                    if (info.Length == 3)
                    {
                        string name = info[0];
                        bool staffTypeParse = Enum.TryParse(typeof(StaffType), info[1], out var staffType);
                        StaffType staffsType = (StaffType)staffType!;
                        string department = info[2];

                        if (staffTypeParse)
                        {
                            staff.Name = name;
                            staff.Type = staffsType;
                            staff.Department = department;
                            inputInfoVaild = true;
                        }
                    }

                    if (!inputInfoVaild)
                        Console.WriteLine("输入的信息无效，请重新输入");
                } while (!inputInfoVaild);


            }

            if (!inputValid)
                Console.WriteLine("输入无效，请重新输入");
        } while (!inputValid);

        return true;
    }

    internal static bool TrySearchStaff(this Company company)
    {
        bool inputValid = false;

        Console.WriteLine("输入要搜索的职工个人信息的id");

        do
        {
            var input = (Console.ReadLine() ?? string.Empty);

            if (int.TryParse(input, out var id))
            {
                inputValid = true;

                var staff = company.SearchStaff(id);

                if (staff is null)
                {
                    Console.WriteLine("不存在指定的职工");
                    return false;
                }

                Console.WriteLine(staff);
            }

            if (!inputValid)
                Console.WriteLine("输入无效，请重新输入");
        } while (!inputValid);

        return true;
    }
}

namespace Test;

internal enum StaffType
{
    Empolyee,
    Boss,
    Manager
}

// 这里的Staff存在一个问题是ID是有符号的，不过负ID显得您身份特殊吗！
internal class Staff
{
    public string Name { get; set; }
    public int Id { get; init; }
    public StaffType Type { get; set; }
    public string Department { get; set; }

    public Staff(string name, int id, StaffType type, string department)
    {
        (Name, Id, Type, Department) = (name, id, type, department);
    }

    // public Staff(string name, int id, Department department) : this(name, id, StaffType.Empolyee, department) { }

    // public Staff(string name, int id) : this(name, id, StaffType.Empolyee, null) { }

    public override string ToString()
    {
        return $"Staff(ID: {Id}, Name: {Name}, Type: {Type}, Department: {Department})";
    }
}