package com.runescape.cache.graphics;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import org.apache.commons.compress.compressors.xz.XZCompressorInputStream;
import org.seven.util.FileUtils;

import com.runescape.io.Buffer;
import com.runescape.sign.SignLink;

public final class SpriteLoader {

	public static Sprite[] sprites;

	public static int totalSprites;

	public static void load() {
		Buffer data = new Buffer(FileUtils.readFile(SignLink.findcachedir() + "main_file_sprites.dat"));

		try (DataInputStream dataFile = new DataInputStream(new XZCompressorInputStream(new ByteArrayInputStream(data.payload)))) {

			int totalSprites = dataFile.readInt();

			sprites = new Sprite[totalSprites];

			for (int index = 0; index < totalSprites; index++) {
				sprites[index] = SpriteLoader.decode(dataFile);

				sprites[index].setTransparency(255, 0, 255);
			}

			System.out.println("Sprites Loaded: " + totalSprites);
		} catch (IOException ex) {
			ex.printStackTrace();
		}
	}

	private static Sprite decode(DataInputStream dat) throws IOException {

		Sprite sprite = new Sprite();

		while (true) {

			byte opcode = dat.readByte();

			if (opcode == 0) {
				return sprite;
			} else if (opcode == 1) {
				sprite.setId(dat.readShort());
			} else if (opcode == 2) {
				sprite.setName(dat.readUTF());
			} else if (opcode == 3) {
				sprite.setWidth(dat.readShort());
			} else if (opcode == 4) {
				sprite.setHeight(dat.readShort());
			} else if (opcode == 5) {
				sprite.setOffsetX(dat.readShort());
			} else if (opcode == 6) {
				sprite.setOffsetY(dat.readShort());
			} else if (opcode == 7) {

				int indexLength = dat.readInt();

				int[] pixels = new int[indexLength];

				for (int i = 0; i < pixels.length; i++) {
					pixels[i] = dat.readInt();
				}

				sprite.pixels = pixels;
			}
		}
	}

}