using System;
using System.Drawing;
using System.Windows.Forms;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;

namespace BizHawk.MultiClient
{
	public class PaletteViewer : Control
	{
		public class Palette
		{
			public int Address { get; private set; }
			public int Value { get; set; }
			public Color Color { get { return Color.FromArgb(Value); } private set { Value = value.ToArgb(); } }

			public Palette(int address)
			{
				Address = address;
				Value = -1;
			}
		}

		public Palette[] bgPalettes = new Palette[16];
		public Palette[] spritePalettes = new Palette[16];

		public Palette[] bgPalettesPrev = new Palette[16];
		public Palette[] spritePalettesPrev = new Palette[16];

		public PaletteViewer()
		{
			SetStyle(ControlStyles.AllPaintingInWmPaint, true);
			SetStyle(ControlStyles.UserPaint, true);
			SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
			SetStyle(ControlStyles.SupportsTransparentBackColor, true);
			this.Size = new Size(128, 32);
			this.BackColor = Color.Transparent;
			this.Paint += new System.Windows.Forms.PaintEventHandler(this.PaletteViewer_Paint);

			for (int x = 0; x < 16; x++)
			{
				bgPalettes[x] = new Palette(x);
				spritePalettes[x] = new Palette(x + 16);
				bgPalettesPrev[x] = new Palette(x);
				spritePalettesPrev[x] = new Palette(x + 16);
			}

		}

		private void PaletteViewer_Paint(object sender, PaintEventArgs e)
		{
			for (int x = 0; x < 16; x++)
			{
				e.Graphics.FillRectangle(new SolidBrush(bgPalettes[x].Color), new Rectangle(x * 16, 1, 16, 16));
				e.Graphics.FillRectangle(new SolidBrush(spritePalettes[x].Color), new Rectangle(x * 16, 17, 16, 16));
			}
		}

		public bool HasChanged()
		{
			for (int x = 0; x < 16; x++)
			{
				if (bgPalettes[x].Value != bgPalettesPrev[x].Value) 
					return true;
				if (spritePalettes[x].Value != spritePalettesPrev[x].Value) 
					return true;
			}
			return false;
		}
	}
}