using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Net.NetworkInformation;

using System.Runtime.InteropServices;

using System.Runtime.InteropServices.ComTypes;

using System.Diagnostics;

using NETWORKLIST;

namespace SharpDisplayManager

{

	public class NetworkManager: INetworkListManagerEvents, IDisposable

    {

		public delegate void OnConnectivityChangedDelegate(NetworkManager aNetworkManager, NLM_CONNECTIVITY aConnectivity);

		public event OnConnectivityChangedDelegate OnConnectivityChanged;

		private int iCookie = 0;

        private IConnectionPoint iConnectionPoint;

        private INetworkListManager iNetworkListManager;

		public NetworkManager()

		{

			iNetworkListManager = new NetworkListManager();

			ConnectToNetworkListManagerEvents();

		}

		public void Dispose()

		{

			//Not sure why this is not working form here

			//Possibly because something is doing automatically before we get there

			//DisconnectFromNetworkListManagerEvents();

		}

		public INetworkListManager NetworkListManager

		{

			get { return iNetworkListManager; }

		}

		public void ConnectivityChanged(NLM_CONNECTIVITY newConnectivity)

		{

			//Fire our event

			OnConnectivityChanged(this, newConnectivity);

		}

		public void ConnectToNetworkListManagerEvents()

		{

			Debug.WriteLine("Subscribing to INetworkListManagerEvents");

			IConnectionPointContainer icpc = (IConnectionPointContainer)iNetworkListManager;

			//similar event subscription can be used for INetworkEvents and INetworkConnectionEvents

			Guid tempGuid = typeof(INetworkListManagerEvents).GUID;

			icpc.FindConnectionPoint(ref tempGuid, out iConnectionPoint);

			iConnectionPoint.Advise(this, out iCookie);

		}

		public void DisconnectFromNetworkListManagerEvents()

		{

			Debug.WriteLine("Un-subscribing to INetworkListManagerEvents");

			iConnectionPoint.Unadvise(iCookie);

		} 

	}

}