namespace TACO
{
	using System;
	using System.Drawing;
	using System.Drawing.Imaging;

	public class SpriteAnimator
	{
		private Image mImage = null;
		private int mCurrentFrame = 0;
		private int mFrames;
		private int mFrameWidth;
		private int mFrameHeight;

		public SpriteAnimator(string filename)
			: this(filename, 0)
		{
		}

		public SpriteAnimator(string filename, int frames)
		{
			mImage = Image.FromFile(filename);

			mFrameHeight = (int)mImage.Height;

			if (frames == 0)
				mFrames = (int)mImage.Width / mFrameHeight;
			else
				mFrames = frames;

			mFrameWidth  = (int)mImage.Width / mFrames;
		}

		public int CurrentFrame
		{
			get { return mCurrentFrame;  }
		}

		public void Reset()
		{
			mCurrentFrame = 0;
		}

		public void NextFrame()
		{
			if (CurrentFrame == mFrames - 1)
				mCurrentFrame = 0;
			else
				mCurrentFrame++;
		}

		public void PrevFrame()
		{
			if (CurrentFrame == 0)
				mCurrentFrame = mFrames - 1;
			else
				mCurrentFrame--;
		}

		public void DrawFrame(Graphics g, Rectangle bounds)
		{
			Bitmap temp;
			Graphics tempG;

			temp = new Bitmap(mFrameWidth, mFrameHeight,
							  PixelFormat.Format32bppArgb);
			tempG = Graphics.FromImage(temp);
			tempG.DrawImageUnscaled(mImage, -(mFrameWidth * CurrentFrame), 0);

			g.DrawImage(temp, bounds);
			temp.Dispose();
		}
	}
}