///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using System.Net;
using System.Windows.Forms;
using log4net;
using TBF.BenchControl.Generic;
using System.IO;

namespace TBF.BenchControl.Network.Adapter
{
	public partial class NetadapterCfgCtrl : UserControl, IComponentCfgCtrl
	{
		static readonly ILog log = LogManager.GetLogger(typeof(NetadapterCfgCtrl));

		public bool ShowMore { get { return false; } }

		NetadapterCfg config;
		public IComponentCfg Config
		{
			get { return config as IComponentCfg; }
			set
			{
				config = value as NetadapterCfg;
				Redraw();
			}
		}

		public NetadapterCfgCtrl()
		{
			InitializeComponent();
		}

		private void EntryFormCfgCtrl_Load(object sender, EventArgs e)
		{
			if (ParentForm == null) return;		/// Return is executed when tab page is open in Designer
			if (config == null) return;			/// Control was not loaded, settings were not changed

			Localize();

			Redraw();
		}

		void Redraw()
		{
			classNameLabel.Text = config.Factory.ClassName;
			nameTextBox.Text = config.Name;
			tftpEnabledCheckBox.Checked = config.TftpServerEnabled;
			tftpDirectoryTextBox.Text = config.TftpServerDirectory;

			AdapterInfo.RefreshNetAdaptersInfo();
			IList<AdapterInfo> adapters = AdapterInfo.NetAdapters;

			string cfgAdapter = string.Empty;
			foreach (AdapterInfo ai in adapters)
			{
				string record;

				if (ai.IPAddress == null)
				{
					/// This happens with network adapters that currently have no IP address,
					/// for instance not connected wireless or dial-up adapters
					record = "???.???.???.???";
				}
				else
				{
					/// Do not consider IPv6 adapters as well as "Any", "Broadcast", "Loopback" or "None" addresses
					if ((ai.IPAddress.AddressFamily == System.Net.Sockets.AddressFamily.InterNetworkV6) ||
						ai.IPAddress.Equals(IPAddress.Any) ||
						ai.IPAddress.Equals(IPAddress.Broadcast) ||
						ai.IPAddress.Equals(IPAddress.IPv6Any) ||
						ai.IPAddress.Equals(IPAddress.IPv6Loopback) ||
						ai.IPAddress.Equals(IPAddress.IPv6None) ||
						ai.IPAddress.Equals(IPAddress.Loopback) ||
						ai.IPAddress.Equals(IPAddress.None))
					{
						continue;
					}

					record = ai.IPAddress.ToString();
				}

				record += " - " + ai.Description;
				int i = adapterComboBox.Items.Add(record);
				if (ai.Description == config.Description)
				{
					/// Select the adapter currently in the configuration
					adapterComboBox.SelectedIndex = i;
				}
			}

			/// Select the first one if the adapter from the configuration does not exist on the system
			if (adapterComboBox.SelectedIndex < 0 && adapterComboBox.Items.Count > 0)
			{
				adapterComboBox.SelectedIndex = 0;
			}
		}

		void Localize()
		{
		}

		public void Closing()
		{
		}

		public void Unlock()
		{
			nameTextBox.Enabled = true;
			adapterComboBox.Enabled = true;
			tftpEnabledCheckBox.Enabled = true;
			tftpDirectoryTextBox.Enabled = true;
		}

		public CfgUpdateFlags VerifyCfg(ref string message)
		{
            CfgUpdateFlags flags = CfgUpdateFlags.None;

			if (!adapterComboBox.Items.Contains(adapterComboBox.Text))
			{
				flags = CfgUpdateFlags.Error;
				message += Environment.NewLine + "Invalid 'Parent Name'";
			}

			if (tftpEnabledCheckBox.Checked && !Directory.Exists(tftpDirectoryTextBox.Text))
			{
				flags = CfgUpdateFlags.Error;
				message += Environment.NewLine + "TFTP Directory does not exist";
			}

			return flags;
		}

		public CfgUpdateFlags UpdateCfg()
		{
			CfgUpdateFlags flags = CfgUpdateFlags.RestartRqrd;

			if (config == null) return CfgUpdateFlags.Error;	/// Control was not loaded, settings were not changed

			config.Name = nameTextBox.Text;

			/// Network adapter
			string strAdapter = adapterComboBox.Text;
			int iDash = strAdapter.IndexOf(" - ");
			config.Description = iDash < 0 ? "" : strAdapter.Substring(iDash + 3);

			config.TftpServerEnabled = tftpEnabledCheckBox.Checked;
			config.TftpServerDirectory = tftpDirectoryTextBox.Text;

			return flags;
		}
	}
}