using System.Drawing;
using System.Windows.Forms;
using OpenRa.FileFormats;
using OpenRa.Game.Graphics;
using OpenRa.TechTree;

namespace OpenRa.Game
{
	using GRegion = OpenRa.Game.Graphics.Region;

	class MainWindow : Form
	{
		readonly Renderer renderer;
		
		Game game;
		public readonly Sidebar sidebar;

		static Size GetResolution(Settings settings)
		{
			Size desktopResolution = Screen.PrimaryScreen.Bounds.Size;

			return new Size(settings.GetValue("width", desktopResolution.Width),
				settings.GetValue("height", desktopResolution.Height));
		}

		public MainWindow(Settings settings)
		{
			FileSystem.Mount(new Folder("../../../../"));
			FileSystem.Mount(new Package("redalert.mix"));
			FileSystem.Mount(new Package("conquer.mix"));
			FileSystem.Mount(new Package("hires.mix"));

			FormBorderStyle = FormBorderStyle.None;
			BackColor = Color.Black;
			StartPosition = FormStartPosition.Manual;
			Location = Point.Empty;
			Visible = true;

			bool windowed = !settings.GetValue("fullscreen", false);
			renderer = new Renderer(this, GetResolution(settings), windowed);
			SheetBuilder.Initialize( renderer );

			game = new Game( settings.GetValue( "map", "scm12ea.ini" ), renderer, new int2( ClientSize ) );

			SequenceProvider.ForcePrecache();

			game.world.Add( new Unit( "mcv", new int2( 5, 5 ), game.players[ 3 ], game ) );
			game.world.Add( new Unit( "mcv", new int2( 7, 5 ), game.players[ 2 ], game ) );
			Unit mcv = new Unit( "mcv", new int2( 9, 5 ), game.players[ 1 ], game );
			game.controller.orderGenerator = mcv;
			game.world.Add( mcv );

			sidebar = new Sidebar(Race.Soviet, renderer, game);

			renderer.SetPalette( new HardwarePalette( renderer, game.map ) );
		}

		internal void Run()
		{
			while (Created && Visible)
			{
				game.Tick();
				Application.DoEvents();
			}
		}

		int2 lastPos;

		protected override void OnMouseDown(MouseEventArgs e)
		{
			base.OnMouseDown(e);
			lastPos = new int2(e.Location);

			if (e.Button == MouseButtons.Left)
				foreach (var region in game.viewport.Regions)
					if (region.Contains(lastPos))
						region.Clicked(e);
		}

		protected override void OnMouseMove(MouseEventArgs e)
		{
			base.OnMouseMove(e);

			if (e.Button == MouseButtons.Right)
			{
				int2 p = new int2(e.Location);
				game.viewport.Scroll(lastPos - p);
				lastPos = p;
			}

			if (game.controller.orderGenerator != null)
				game.controller.orderGenerator.PrepareOverlay(game, 
					new int2(e.Location.X / 24, e.Location.Y / 24));
		}
	}
}