using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using Mesen.GUI.Controls;
using Mesen.GUI.Forms;

namespace Mesen.GUI.Debugger.Controls
{
	public partial class ctrlPaletteViewer : BaseControl
	{
		private byte[] _paletteRam;
		private int[] _palettePixelData;
		private int _paletteIndex = -1;

		public ctrlPaletteViewer()
		{
			InitializeComponent();
		}
		
		public void GetData()
		{
			this._paletteRam = InteropEmu.DebugGetMemoryState(DebugMemoryType.PaletteMemory);
			this._palettePixelData = InteropEmu.DebugGetPalette();
		}

		public void RefreshViewer()
		{
			_paletteIndex = -1;

			GCHandle handle = GCHandle.Alloc(this._palettePixelData, GCHandleType.Pinned);
			try {
				Bitmap source = new Bitmap(4, 8, 4*4, System.Drawing.Imaging.PixelFormat.Format32bppArgb, handle.AddrOfPinnedObject());
				Bitmap target = new Bitmap(128, 256);

				using(Graphics g = Graphics.FromImage(target)) {
					g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
					g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.None;
					g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.Half;
					g.ScaleTransform(32, 32);
					g.DrawImageUnscaled(source, 0, 0);

					g.ResetTransform();
					Font font = new Font(BaseControl.MonospaceFontFamily, BaseControl.DefaultFontSize - 2, GraphicsUnit.Pixel);
					using(Brush bg = new SolidBrush(Color.FromArgb(150, Color.LightGray))) {
						for(int y = 0; y < 8; y++) {
							for(int x = 0; x < 4; x++) {
								g.DrawOutlinedString(_paletteRam[y*4+x].ToString("X2"), font, Brushes.Black, bg, 32*x+14, 32*y+18);
							}
						}
					}
				}
				this.picPalette.Image = target;
			} finally {
				handle.Free();
			}
		}

		private void picPalette_MouseMove(object sender, MouseEventArgs e)
		{
			int tileX = Math.Min(e.X * 128 / (picPalette.Width - 2) / 32, 31);
			int tileY = Math.Min(e.Y * 256 / (picPalette.Height - 2) / 32, 31);

			int tileIndex = tileY * 4 + tileX;

			if(tileIndex != _paletteIndex) {
				_paletteIndex = tileIndex;

				this.txtColor.Text = _paletteRam[tileIndex].ToString("X2");
				this.txtPaletteAddress.Text = (0x3F00 + tileIndex).ToString("X4");

				Bitmap tile = new Bitmap(64, 64);
				using(Graphics g = Graphics.FromImage(tile)) {
					g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.NearestNeighbor;
					g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.None;
					g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.Half;
					g.DrawImage(picPalette.Image, new Rectangle(0, 0, 64, 64), new Rectangle(tileX*32, tileY*32, 32, 32), GraphicsUnit.Pixel);
				}
				this.picColor.Image = tile;
			}
		}

		private void picPalette_MouseDown(object sender, MouseEventArgs e)
		{
			using(frmSelectColor frm = new frmSelectColor()) {
				if(frm.ShowDialog(this) == DialogResult.OK) {
					int x = Math.Min(e.X * 128 / picPalette.Width / 32, 31);
					int y = Math.Min(e.Y * 256 / picPalette.Height / 32, 31);
					int colorAddress = y * 4 + x;

					InteropEmu.DebugSetMemoryValue(DebugMemoryType.PaletteMemory, (uint)colorAddress, (byte)frm.ColorIndex);
					this.GetData();
					this.RefreshViewer();
				}
			}
		}
	}
}