#region Copyright & License Information
/*
 * Copyright 2007-2010 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 LICENSE.
 */
#endregion

using System;
using System.Collections.Generic;
using System.Drawing;
using OpenRA.FileFormats;
using OpenRA.Traits;

namespace OpenRA.Graphics
{
	class HardwarePalette : Sheet
	{
		public const int MaxPalettes = 64;
		int allocated = 0;
		
		// We need to store the Palettes themselves for the remap palettes to work
		// We should probably try to fix this somehow
		static Dictionary<string, Palette> palettes;
		static Dictionary<string, int> indices;
		public HardwarePalette(Renderer renderer, Map map)
			: base(renderer,new Size(256, MaxPalettes))
		{
			palettes = new Dictionary<string, Palette>();
			indices = new Dictionary<string, int>();
		}
		
		public Palette GetPalette(string name)
		{
			try { return palettes[name]; }
			catch (KeyNotFoundException)
			{
				throw new InvalidOperationException(
					"Palette `{0}` does not exist".F(name));
			}
		}

		public int GetPaletteIndex(string name)
		{
			try { return indices[name]; }
			catch (KeyNotFoundException)
			{
				throw new InvalidOperationException(
					"Palette `{0}` does not exist".F(name));
			}
		}
		
		public int AddPalette(string name, Palette p)
		{
			palettes.Add(name, p);
			indices.Add(name, allocated);
			for (int i = 0; i < 256; i++)
			{
				this[new Point(i, allocated)] = p.GetColor(i);
			}
			return allocated++;
		}
		
		public void UpdatePalette(string name, Palette p)	
		{
			palettes[name] = p;
			var j = indices[name];
			
			for (int i = 0; i < 256; i++)
			{
				this[new Point(i, j)] = p.GetColor(i);
			}
		}
		
		public void Update(IEnumerable<IPaletteModifier> paletteMods)
		{
			var b = new Bitmap(Bitmap);
			foreach (var mod in paletteMods)
				mod.AdjustPalette(b);

			Texture.SetData(b);
			Game.Renderer.PaletteTexture = Texture;
		}
	}
}