#region Copyright & License Information
/*
 * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation. For more information,
 * see COPYING.
 */
#endregion

using System;
using System.IO;
using System.Linq;
using OpenRA.Network;
using OpenRA.Widgets;

namespace OpenRA.Mods.RA.Widgets.Logic
{
	public class ReplayBrowserLogic
	{
		Widget widget;

		[ObjectCreator.UseCtor]
		public ReplayBrowserLogic(Widget widget)
		{
			this.widget = widget;

			widget.GetWidget<ButtonWidget>("CANCEL_BUTTON").OnClick = () => Widget.CloseWindow();

			/* find some replays? */
			var rl = widget.GetWidget<ScrollPanelWidget>("REPLAY_LIST");
			var replayDir = Path.Combine(Platform.SupportDir, "Replays");

			var template = widget.GetWidget<ScrollItemWidget>("REPLAY_TEMPLATE");
			SelectReplay(null);

			rl.RemoveChildren();
			if (Directory.Exists(replayDir))
				foreach (var replayFile in Directory.GetFiles(replayDir, "*.rep").Reverse())
					AddReplay(rl, replayFile, template);

			widget.GetWidget<ButtonWidget>("WATCH_BUTTON").OnClick = () =>
			{
				if (currentReplay != null)
				{
					Widget.CloseWindow();
					Game.JoinReplay(currentReplay);
				}
			};

			widget.GetWidget("REPLAY_INFO").IsVisible = () => currentReplay != null;
		}

		string currentReplay;

		void SelectReplay(string filename)
		{
			currentReplay = filename;

			if (currentReplay != null)
			{
				try
				{
					var summary = new Replay(currentReplay);
					var mapStub = summary.Map();

					widget.GetWidget<LabelWidget>("DURATION").GetText =
						() => WidgetUtils.FormatTime(summary.Duration * 3	/* todo: 3:1 ratio isnt always true. */);
					widget.GetWidget<MapPreviewWidget>("MAP_PREVIEW").Map = () => mapStub;
					widget.GetWidget<LabelWidget>("MAP_TITLE").GetText =
						() => mapStub != null ? mapStub.Title : "(Unknown Map)";
				}
				catch(Exception e)
				{
					Log.Write("debug", "Exception while parsing replay: {0}", e);
					currentReplay = null;
				}
			}
		}

		void AddReplay(ScrollPanelWidget list, string filename, ScrollItemWidget template)
		{
			var item = ScrollItemWidget.Setup(template,
				() => currentReplay == filename,
				() => SelectReplay(filename));
			var f = Path.GetFileName(filename);
			item.GetWidget<LabelWidget>("TITLE").GetText = () => f;
			list.AddChild(item);
		}
	}
}