/*
 * Greenshot - a free and open source screenshot tool
 * Copyright (C) 2007-2016 Thomas Braun, Jens Klingen, Robin Krom
 * 
 * For more information see: http://getgreenshot.org/
 * The Greenshot project is hosted on GitHub https://github.com/greenshot/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 Greenshot.IniFile;
using Greenshot.Interop.Office;
using Greenshot.Plugin;
using GreenshotPlugin.Core;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Text.RegularExpressions;
using System.Windows.Forms;

namespace GreenshotOfficePlugin {
	/// <summary>
	/// Description of OutlookDestination.
	/// </summary>
	public class OutlookDestination : AbstractDestination {
		private static readonly log4net.ILog Log = log4net.LogManager.GetLogger(typeof(OutlookDestination));
		private const int IconApplication = 0;
		private const int IconMeeting = 2;

		private static readonly Image MailIcon = GreenshotResources.getImage("Email.Image");
		private static readonly OfficeConfiguration OfficeConfig = IniConfig.GetIniSection<OfficeConfiguration>();
		private static readonly string ExePath;
		private static readonly bool IsActiveFlag;
		private const string MapiClient = "Microsoft Outlook";
		private readonly string _outlookInspectorCaption;
		private readonly OlObjectClass _outlookInspectorType;

		static OutlookDestination() {
			if (EmailConfigHelper.HasOutlook()) {
				IsActiveFlag = true;
			}
			ExePath = PluginUtils.GetExePath("OUTLOOK.EXE");
			if (ExePath != null && File.Exists(ExePath)) {
				WindowDetails.AddProcessToExcludeFromFreeze("outlook");
			} else {
				ExePath = null;
			}
			if (ExePath == null) {
				IsActiveFlag = false;
			}
		}

		public OutlookDestination() {
		}

		public OutlookDestination(string outlookInspectorCaption, OlObjectClass outlookInspectorType) {
			_outlookInspectorCaption = outlookInspectorCaption;
			_outlookInspectorType = outlookInspectorType;
		}

		public override string Designation => "Outlook";

		public override string Description => _outlookInspectorCaption ?? MapiClient;

		public override int Priority => 3;

		public override bool IsActive => base.IsActive && IsActiveFlag;

		public override bool IsDynamic => true;

		public override Keys EditorShortcutKeys => Keys.Control | Keys.E;

		public override Image DisplayIcon {
			get
			{
				if (_outlookInspectorCaption == null)
				{
					return PluginUtils.GetCachedExeIcon(ExePath, IconApplication);
				}
				if (OlObjectClass.olAppointment.Equals(_outlookInspectorType)) {
					// Make sure we loaded the icon, maybe the configuration has been changed!
					return PluginUtils.GetCachedExeIcon(ExePath, IconMeeting);
				}
				return MailIcon;
			}
		}
		
		public override IEnumerable<IDestination> DynamicDestinations() {
			IDictionary<string, OlObjectClass> inspectorCaptions = OutlookEmailExporter.RetrievePossibleTargets();
			if (inspectorCaptions != null) {
				foreach (string inspectorCaption in inspectorCaptions.Keys) {
					yield return new OutlookDestination(inspectorCaption, inspectorCaptions[inspectorCaption]);
				}
			}
		}

		/// <summary>
		/// Export the capture to outlook
		/// </summary>
		/// <param name="manuallyInitiated"></param>
		/// <param name="surface"></param>
		/// <param name="captureDetails"></param>
		/// <returns></returns>
		public override ExportInformation ExportCapture(bool manuallyInitiated, ISurface surface, ICaptureDetails captureDetails) {
			ExportInformation exportInformation = new ExportInformation(Designation, Description);
			// Outlook logic
			string tmpFile = captureDetails.Filename;
			if (tmpFile == null || surface.Modified || !Regex.IsMatch(tmpFile, @".*(\.png|\.gif|\.jpg|\.jpeg|\.tiff|\.bmp)$")) {
				tmpFile = ImageOutput.SaveNamedTmpFile(surface, captureDetails, new SurfaceOutputSettings().PreventGreenshotFormat());
			} else {
				Log.InfoFormat("Using already available file: {0}", tmpFile);
			}

			// Create a attachment name for the image
			string attachmentName = captureDetails.Title;
			if (!string.IsNullOrEmpty(attachmentName)) {
				attachmentName = attachmentName.Trim();
			}
			// Set default if non is set
			if (string.IsNullOrEmpty(attachmentName)) {
				attachmentName = "Greenshot Capture";
			}
			// Make sure it's "clean" so it doesn't corrupt the header
			attachmentName = Regex.Replace(attachmentName, @"[^\x20\d\w]", "");

			if (_outlookInspectorCaption != null) {
				OutlookEmailExporter.ExportToInspector(_outlookInspectorCaption, tmpFile, attachmentName);
				exportInformation.ExportMade = true;
			} else {
				if (!manuallyInitiated) {
					var inspectorCaptions = OutlookEmailExporter.RetrievePossibleTargets();
					if (inspectorCaptions != null && inspectorCaptions.Count > 0) {
						var destinations = new List<IDestination>
						{
							new OutlookDestination()
						};
						foreach (string inspectorCaption in inspectorCaptions.Keys) {
							destinations.Add(new OutlookDestination(inspectorCaption, inspectorCaptions[inspectorCaption]));
						}
						// Return the ExportInformation from the picker without processing, as this indirectly comes from us self
						return ShowPickerMenu(false, surface, captureDetails, destinations);
					}
				} else {
					exportInformation.ExportMade = OutlookEmailExporter.ExportToOutlook(OfficeConfig.OutlookEmailFormat, tmpFile, FilenameHelper.FillPattern(OfficeConfig.EmailSubjectPattern, captureDetails, false), attachmentName, OfficeConfig.EmailTo, OfficeConfig.EmailCC, OfficeConfig.EmailBCC, null);
				}
			}
			ProcessExport(exportInformation, surface);
			return exportInformation;
		}
	}
}