using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Event_Delegate_Action
{
    public delegate void NameChangedEventHandler(string name);
    public delegate void IDNameEventHandler(int id, string name);

    public partial class frmDelegateEvents : Form
    {
        Person Test;
        Server MyServer;

        public frmDelegateEvents()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Test = new Person() { Name = "Default" };
            Test.NameChanged += Test_NameChanged;
            Test.Name = "NewName";


            MyServer = new Server();
            MyServer.EvHaSend += MyServer_EvHaSend;
            MyServer.EvHaError += MyServer_EvHaError;
            MyServer.EvHaReceived += MyServer_EvHaReceived;

            MyServer.EvIDName += MyServer_EvIDName;
        }

        private void MyServer_EvIDName(int id, string name)
        {
            MessageBox.Show($"{id} {name}", "MyServer_EvIDName    Info...", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }

        private void MyServer_EvHaReceived(object sender, ServerEventArgs e)
        {

        }

        private void MyServer_EvHaError(object sender, ServerEventArgs e)
        {

        }

        private void MyServer_EvHaSend(object sender, ServerEventArgs e)
        {
            MessageBox.Show($"{e.ID} {e.Message}", "Info...", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }

        private void Test_NameChanged(string name)
        {
            // throw new NotImplementedException();
            MessageBox.Show(name, "Info...", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        }

        static int BoardId = 0;

        private void btnSendMessage_Click(object sender, EventArgs e)
        {
            string tag;
            tag = $@"<ROOT><BOARD_REQUEST boardID=""{++BoardId}"" boardCode=""{txtSerialNo.Text}"" device=""Printer""/></ROOT>";

            MyServer.SendMessage(tag);

            MyServer.SendMessage(2911, "test with id and a message");
        }
    }


    enum MessageTypes
    {
        Wait,
        Status,
        MessageSend,
        MessageReceived,
        Error
    }

    public class ServerEventArgs : EventArgs
    {
        internal int ID { get; set; }
        internal string Message { get; set; }
        internal MessageTypes MessageType { get; set; }
    }

    public class Server
    {
        public event EventHandler<ServerEventArgs> EvHaReceived;
        public event EventHandler<ServerEventArgs> EvHaSend;
        public event EventHandler<ServerEventArgs> EvHaError;
        public event IDNameEventHandler EvIDName;

        public void SendMessage(string message)
        {
           // EvHaSend?.Invoke(this, new ServerEventArgs() { ID = 3123, Message = @"<ROOT>Answer</ROOT>", MessageType = MessageTypes.MessageSend });
            EvHaSend?.Invoke(this, new ServerEventArgs() { ID = 3123, Message = message, MessageType = MessageTypes.MessageSend });
        }

        public void SendMessage(int id, string message)
        {
            EvIDName?.Invoke(id, message);
        }
    }


    public class Person
    {
        //This is the event
        //The subscribers of the event, should have the same signature
        //as the delegate that used to define the event 
        public event NameChangedEventHandler NameChanged;

        private string name;
        public string Name
        {
            get { return name; }
            set
            {
                name = value;
                //Raise the event = calling all the subscribers delegate
                NameChanged?.Invoke(value);
            }
        }
    }
}