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;
using WakeOnLan;
using System.Configuration;
using System.Threading;

namespace Waker
{
	public partial class MainForm : Form
	{
		private readonly Color PING_SUCCESS = Color.Green;
		private readonly Color PING_FAIL = Color.Red;
		private readonly Color PING_UNKNOWN = Color.Gray;

		private string ip;
		private string mac;
		private string ports;
		private string pingPort;

		private Thread pingThread;

		public MainForm()
		{
			InitializeComponent();
			InitInstance();
		}

		private void InitInstance()
		{
			string path = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal).FilePath;

			if (!string.IsNullOrEmpty(Settings.Default.ip))
				ip = Settings.Default.ip;

			if (!string.IsNullOrEmpty(Settings.Default.mac))
				mac = Settings.Default.mac;

			if (!string.IsNullOrEmpty(Settings.Default.ports))
				ports = Settings.Default.ports;

			if (!string.IsNullOrEmpty(Settings.Default.pingPort))
				pingPort = Settings.Default.pingPort;

			FillInformation();

			AddressTextBox.TextChanged += AddressTextBox_TextChanged;

			AddressTextBox.KeyUp += TextBox_KeyUp;
			MacTextBox.KeyUp += TextBox_KeyUp;
			PortTextBox.KeyUp += TextBox_KeyUp;
		}

		private void AddressTextBox_TextChanged(object sender, EventArgs e)
		{
			SetIp();
		}

		private bool SetIp()
		{
			ip = AddressTextBox.Text.Replace(" ", "");
			if (string.IsNullOrEmpty(ip))
				return false;

			AddressTextBox.Text = ip;
			Settings.Default.ip = ip;
			Settings.Default.Save();

			return true;
		}

		private bool SetInformation()
		{
			ip = AddressTextBox.Text.Replace(" ", "");
			mac = MacTextBox.Text.Replace(" ", "");
			ports = PortTextBox.Text.Replace(" ", "");

			if (string.IsNullOrEmpty(ip) || string.IsNullOrEmpty(mac))
				return false;

			AddressTextBox.Text = ip;
			MacTextBox.Text = mac;
			PortTextBox.Text = ports;

			Settings.Default.ip = ip;
			Settings.Default.mac = mac;
			Settings.Default.ports = ports;

			Settings.Default.Save();

			return true;
		}

		private void FillInformation()
		{
			if (!string.IsNullOrEmpty(ip))
				AddressTextBox.Text = ip;

			if (!string.IsNullOrEmpty(mac))
				MacTextBox.Text = mac;

			if (!string.IsNullOrEmpty(ports))
				PortTextBox.Text = ports;

			if (!string.IsNullOrEmpty(pingPort))
				PingPortTextBox.Text = pingPort;
		}

		private void WakeButton_Click(object sender, EventArgs e)
		{
			if (!SetInformation())
			{
				MessageBox.Show("Invalid information");
				return;
			}

			try
			{
				string portsString = ports.Replace(" ", "");

				if (string.IsNullOrEmpty(portsString))
                {
					WoL.Wake(ip, mac);
					return;
				}
					

				string[] portStringArray = portsString.Split(',');
				if (portStringArray == null || portStringArray.Length < 1 || string.IsNullOrEmpty(portStringArray[0]))
                {
					WoL.Wake(ip, mac);
					return;
				}
					

				int[] portArray = portStringArray.Select(int.Parse).ToArray();
				if (portArray == null || portArray.Length< 1)
                {
					WoL.Wake(ip, mac);
					return;
				}
					

				WoL.Wake(ip, mac, portArray);
			} catch (Exception ex)
			{
				MessageBox.Show(ex.Message);
			}
		}

		private void TextBox_KeyUp(object sender, KeyEventArgs e)
		{
			if (e.KeyCode != Keys.Enter)
				return;

			WakeButton_Click(sender, e);
		}

		private void PingPortTextBox_TextChanged(object sender, EventArgs e)
		{
			if (string.IsNullOrEmpty(PingPortTextBox.Text))
				return;

			pingPort = PingPortTextBox.Text;

			if (!pingTimer.Enabled)
				pingTimer.Enabled = true;
		}

		private void pingTimer_Tick(object sender, EventArgs e)
		{
			try
			{
				int targetPort = 0;
				if (!int.TryParse(pingPort, out targetPort))
				{
					PingStatusPanel.BackColor = PING_UNKNOWN;
					return;
				}

				if (targetPort < 1)
				{
					PingStatusPanel.BackColor = PING_UNKNOWN;
					return;
				}

				if (string.IsNullOrEmpty(ip))
					return;

				Settings.Default.pingPort = pingPort;
				Settings.Default.Save();

				object[] parameters = new object[2] { ip, targetPort };
				pingThread = new Thread(new ParameterizedThreadStart(SendPing));
				pingThread.Start(parameters);
				
			} catch (Exception ex)
			{
				pingTimer.Enabled = false;
				MessageBox.Show(ex.Message);
			}
		}

		public void SendPing(object parameters)
		{
			object[] src = parameters as object[];
			if (src == null || src.Length < 2)
				return;

			string ip = src[0] as string;
			int? port = src[1] as int?;

			if (ip == null || port == null)
				return;

			if (PingCheck.Test(ip, port == null ? default(int) : port.Value))
			{
				PingStatusPanel.BackColor = PING_SUCCESS;
			}
			else
				PingStatusPanel.BackColor = PING_FAIL;
		}
	}
}