/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2015 Thomas Braun, Jens Klingen, Robin Krom
 *
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on Sourceforge: http://sourceforge.net/projects/greenshot/
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 1 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

using GreenshotPlugin.Core;
using System;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel.DataTransfer;

namespace GreenshotWin10Plugin.Native
{
	/// <summary>
	/// Wraps the interop for calling the ShareUI
	/// </summary>
	public class DataTransferManagerHelper
	{
		private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(typeof(DataTransferManagerHelper));

		private const string DataTransferManagerId = "a5caee9b-8708-49d1-8d36-67d25a8da00c";
		private readonly IDataTransferManagerInterOp _dataTransferManagerInterOp;
		private readonly IntPtr _windowHandle;

        /// <summary>
        /// The DataTransferManager
        /// </summary>
		public DataTransferManager DataTransferManager
		{
			get;
			private set;
		}
        /// <summary>
        /// Constructor which takes a handle to initialize
        /// </summary>
        /// <param name="handle"></param>
		public DataTransferManagerHelper(IntPtr handle)
		{
			//TODO: Add a check for failure here. This will fail for versions of Windows below Windows 10
			IActivationFactory activationFactory = WindowsRuntimeMarshal.GetActivationFactory(typeof(DataTransferManager));

			// ReSharper disable once SuspiciousTypeConversion.Global
			_dataTransferManagerInterOp = (IDataTransferManagerInterOp)activationFactory;

			_windowHandle = handle;
			var riid = new Guid(DataTransferManagerId);
		    var hresult = _dataTransferManagerInterOp.GetForWindow(_windowHandle, riid, out var dataTransferManager);
			if (hresult.Failed())
			{
				Log.WarnFormat("HResult for GetForWindow: {0}", hresult);
			}
			DataTransferManager = dataTransferManager;
		}

		/// <summary>
		/// Show the share UI
		/// </summary>
		public void ShowShareUi()
		{
			var hresult = _dataTransferManagerInterOp.ShowShareUIForWindow(_windowHandle);
		    if (hresult.Failed())
		    {
                Log.WarnFormat("HResult for ShowShareUIForWindow: {0}", hresult);
			}
			else
			{
				Log.Debug("ShowShareUIForWindow called");
			}
		}
	}

}