package shootergame.util.gl.texture;

import static org.lwjgl.opengl.GL11.GL_NEAREST;
import static org.lwjgl.opengl.GL11.GL_RGBA;
import static org.lwjgl.opengl.GL11.GL_TEXTURE_2D;
import static org.lwjgl.opengl.GL11.GL_TEXTURE_MAG_FILTER;
import static org.lwjgl.opengl.GL11.GL_TEXTURE_MIN_FILTER;
import static org.lwjgl.opengl.GL11.GL_UNSIGNED_BYTE;
import static org.lwjgl.opengl.GL11.glBindTexture;
import static org.lwjgl.opengl.GL11.glGenTextures;
import static org.lwjgl.opengl.GL11.glTexImage2D;
import static org.lwjgl.opengl.GL11.glTexParameteri;

import shootergame.resources.Resource;

public class TextureMap
{
	private int texture_gl;
	private int max_x;
	private int max_y;
	private int scale;
	private Resource resource;
	
	public TextureMap(int scale, Resource resource) {
		this.scale = scale;
		this.resource = resource;
	}
	
	public void init()
	{
		// Generate and bind the texture map
		this.texture_gl = glGenTextures();
		glBindTexture(GL_TEXTURE_2D, this.texture_gl);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
		
		// Load the texture into opengl
		Texture texture = new Texture(resource);
		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
				texture.getWidth(), texture.getHeight(),
				0, GL_RGBA, GL_UNSIGNED_BYTE, texture.getByteBuffer());
		
		// Store the width and height variables
		this.max_x = texture.getWidth();
		this.max_y = texture.getHeight();
		
		System.out.println("texmap: "+texture_gl);
		
		// Free the texture
		//texture.free();
	}
	
	public TextureReference getTextureReference(int start_x, int end_x, int start_y, int end_y) {
		return new TextureReference(start_x * scale, end_x * scale, start_y * scale, end_y * scale)
		{

			@Override
			public int getMaxX() {
				return max_x;
			}

			@Override
			public int getMaxY() {
				return max_y;
			}
	
		};
	}
	
	public void bindTexture() {
		glBindTexture(GL_TEXTURE_2D, texture_gl);
	}
	
	public void unbindTexture() {
		glBindTexture(GL_TEXTURE_2D, 0);
	}
}