#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.Linq;
using OpenRA.FileFormats;
using OpenRA.Widgets;

namespace OpenRA.Mods.RA.Widgets.Logic
{
	public class MainMenuButtonsLogic
	{
		[ObjectCreator.UseCtor]
		public MainMenuButtonsLogic(Widget widget)
		{
			Game.modData.WidgetLoader.LoadWidget( new WidgetArgs(), Widget.RootWidget, "PERF_BG" );
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_JOIN").OnClick = () => Widget.OpenWindow("JOINSERVER_BG");
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_CREATE").OnClick = () => Widget.OpenWindow("CREATESERVER_BG");
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_SETTINGS").OnClick = () => Widget.OpenWindow("SETTINGS_MENU");
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_MUSIC").OnClick = () => Widget.OpenWindow("MUSIC_MENU");
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_REPLAY_VIEWER").OnClick = () => Widget.OpenWindow("REPLAYBROWSER_BG");
			widget.GetWidget<ButtonWidget>("MAINMENU_BUTTON_QUIT").OnClick = () => Game.Exit();

			DisplayModSelector();
		}

		public static void DisplayModSelector()
		{
			var selector = Game.modData.WidgetLoader.LoadWidget( new WidgetArgs(), Widget.RootWidget, "QUICKMODSWITCHER" );
			var switcher = selector.GetWidget<DropDownButtonWidget>("SWITCHER");
			switcher.OnMouseDown = _ => ShowModsDropDown(switcher);
			switcher.GetText = WidgetUtils.ActiveModTitle;
			selector.GetWidget<LabelWidget>("VERSION").GetText = WidgetUtils.ActiveModVersion;
		}

		static void LoadMod(string mod)
		{
			var mods = Mod.AllMods[mod].WithPrerequisites();

			if (Game.CurrentMods.Keys.ToArray().SymmetricDifference(mods.ToArray()).Any())
				Game.RunAfterTick(() => Game.InitializeWithMods(mods.ToArray()));
		}

		static void ShowModsDropDown(DropDownButtonWidget dropdown)
		{
			Func<string, ScrollItemWidget, ScrollItemWidget> setupItem = (m, itemTemplate) =>
			{
				var item = ScrollItemWidget.Setup(itemTemplate,
					() => m == Game.CurrentMods.Keys.First(),
					() => LoadMod(m));
				item.GetWidget<LabelWidget>("LABEL").GetText = () => Mod.AllMods[m].Title;
				return item;
			};

			dropdown.ShowDropDown("LABEL_DROPDOWN_TEMPLATE", 150, Mod.AllMods.Keys.ToList(), setupItem);
		}
	}
}