/*
 * Copyright (c) 2016-2017, Adam <Adam@sigterm.info>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.runelite.mixins;

import java.awt.Color;
import java.awt.image.BufferedImage;
import net.runelite.api.mixins.Copy;
import net.runelite.api.mixins.Inject;
import net.runelite.api.mixins.Mixin;
import net.runelite.api.mixins.Replace;
import net.runelite.api.mixins.Shadow;
import net.runelite.rs.api.RSClient;
import net.runelite.rs.api.RSSpritePixels;

@Mixin(RSSpritePixels.class)
public abstract class RSSpritePixelsMixin implements RSSpritePixels
{
	private static final int ALPHA = 0xFF000000;

	@Shadow("client")
	private static RSClient client;

	@Shadow("hdMinimapEnabled")
	private static boolean hdMinimapEnabled;

	@Inject
	@Override
	public BufferedImage toBufferedImage()
	{
		BufferedImage img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);

		toBufferedImage(img);

		return img;
	}

	@Inject
	@Override
	public void toBufferedImage(BufferedImage img)
	{
		int width = getWidth();
		int height = getHeight();

		if (img.getWidth() != width || img.getHeight() != height)
		{
			throw new IllegalArgumentException("Image bounds do not match Sprite");
		}

		int[] pixels = getPixels();
		int[] transPixels = new int[pixels.length];

		for (int i = 0; i < pixels.length; i++)
		{
			if (pixels[i] != 0)
			{
				transPixels[i] = pixels[i] | 0xff000000;
			}
		}

		img.setRGB(0, 0, width, height, transPixels, 0, width);
	}

	@Inject
	@Override
	public BufferedImage toBufferedOutline(Color color)
	{
		BufferedImage img = new BufferedImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_ARGB);

		toBufferedOutline(img, color.getRGB());

		return img;
	}

	@Inject
	@Override
	public void toBufferedOutline(BufferedImage img, int color)
	{
		int width = getWidth();
		int height = getHeight();

		if (img.getWidth() != width || img.getHeight() != height)
		{
			throw new IllegalArgumentException("Image bounds do not match Sprite");
		}

		int[] pixels = getPixels();
		int[] newPixels = new int[width * height];
		int pixelIndex = 0;

		for (int y = 0; y < height; ++y)
		{
			for (int x = 0; x < width; ++x)
			{
				int pixel = pixels[pixelIndex];
				if (pixel == 16777215 || pixel == 0)
				{
					// W
					if (x > 0 && pixels[pixelIndex - 1] != 0)
					{
						pixel = color;
					}
					// N
					else if (y > 0 && pixels[pixelIndex - width] != 0)
					{
						pixel = color;
					}
					// E
					else if (x < width - 1 && pixels[pixelIndex + 1] != 0)
					{
						pixel = color;
					}
					// S
					else if (y < height - 1 && pixels[pixelIndex + width] != 0)
					{
						pixel = color;
					}
					newPixels[pixelIndex] = pixel;
				}

				pixelIndex++;
			}
		}

		img.setRGB(0, 0, width, height, newPixels, 0, width);
	}

	@Copy("drawRotatedMaskedCenteredAround")
	@Replace("drawRotatedMaskedCenteredAround")
	public void copy$drawAlphaMapped(int x, int y, int width, int height, int xOffset, int yOffset, int rotation,
																int zoom, int[] xOffsets, int[] yOffsets)
	{
		if (!hdMinimapEnabled)
		{
			copy$drawAlphaMapped(x, y, width, height, xOffset, yOffset, rotation, zoom, xOffsets, yOffsets);
			return;
		}
		try
		{
			int[] graphicsPixels = client.getGraphicsPixels();

			int[] spritePixels = getPixels();
			int spriteWidth = getWidth();

			int centerX = -width / 2;
			int centerY = -height / 2;
			int rotSin = (int) (Math.sin((double) rotation / 326.11D) * 65536.0D);
			int rotCos = (int) (Math.cos((double) rotation / 326.11D) * 65536.0D);
			rotSin = rotSin * zoom >> 8;
			rotCos = rotCos * zoom >> 8;
			int posX = centerY * rotSin + centerX * rotCos + (xOffset << 16);
			int posY = centerY * rotCos - centerX * rotSin + (yOffset << 16);
			int pixelIndex = x + y * client.getGraphicsPixelsWidth();

			for (y = 0; y < height; ++y)
			{
				int spriteOffsetX = xOffsets[y];
				int graphicsPixelIndex = pixelIndex + spriteOffsetX;
				int spriteX = posX + rotCos * spriteOffsetX;
				int spriteY = posY - rotSin * spriteOffsetX;

				for (x = -yOffsets[y]; x < 0; ++x)
				{
					// bilinear interpolation
					// Thanks to Bubletan
					int x1 = spriteX >> 16;
					int y1 = spriteY >> 16;
					int x2 = x1 + 1;
					int y2 = y1 + 1;
					int c1 = spritePixels[x1 + y1 * spriteWidth];
					int c2 = spritePixels[x2 + y1 * spriteWidth];
					int c3 = spritePixels[x1 + y2 * spriteWidth];
					int c4 = spritePixels[x2 + y2 * spriteWidth];
					int u1 = (spriteX >> 8) - (x1 << 8);
					int v1 = (spriteY >> 8) - (y1 << 8);
					int u2 = (x2 << 8) - (spriteX >> 8);
					int v2 = (y2 << 8) - (spriteY >> 8);
					int a1 = u2 * v2;
					int a2 = u1 * v2;
					int a3 = u2 * v1;
					int a4 = u1 * v1;
					int r = (c1 >> 16 & 0xFF) * a1 + (c2 >> 16 & 0xFF) * a2 +
							(c3 >> 16 & 0xFF) * a3 + (c4 >> 16 & 0xFF) * a4 & 0xFF0000;
					int g = (c1 >> 8 & 0xFF) * a1 + (c2 >> 8 & 0xFF) * a2 +
							(c3 >> 8 & 0xFF) * a3 + (c4 >> 8 & 0xFF) * a4 >> 8 & 0xFF00;
					int b = (c1 & 0xFF) * a1 + (c2 & 0xFF) * a2 +
							(c3 & 0xFF) * a3 + (c4 & 0xFF) * a4 >> 16;
					graphicsPixels[graphicsPixelIndex++] = ALPHA | r | g | b;
					spriteX += rotCos;
					spriteY -= rotSin;
				}

				posX += rotSin;
				posY += rotCos;
				pixelIndex += client.getGraphicsPixelsWidth();
			}
		}
		catch (Exception e)
		{
			// ignored
		}

	}
}
