package projectzombie.entity.particle;

import projectzombie.Main;
import projectzombie.display.Camera;
import projectzombie.entity.EntityVertical;
import projectzombie.util.gl.GlHelpers;
import projectzombie.util.gl.texture.IHasTexture;
import projectzombie.util.gl.texture.TextureReference;
import projectzombie.util.math.MathHelpers;
import projectzombie.util.math.TileState;
import projectzombie.util.math.random.RandomHelpers;
import projectzombie.util.math.vec.Vec2d;
import projectzombie.util.math.vec.Vec2i;
import projectzombie.util.math.vec.Vec3d;
import projectzombie.world.chunk.Chunk;
import projectzombie.world.layer.Layer;

public class ParticleBreak extends EntityVertical
{
	private double height = 0;
	private Vec3d velocity;
	private int time = 1000;
	
	private static TextureReference getTexture(TileState ts)
	{
		if(ts.tile instanceof IHasTexture)
		{
			TextureReference tex = ((IHasTexture)ts.tile).getTexture();
			int px = RandomHelpers.randrange(rand, tex.start_x, tex.end_x - 2);
			int py = RandomHelpers.randrange(rand, tex.start_y, tex.end_y - 2);
			return tex.getTextureReference(px, px + 2, py, py + 2);
		}
		
		else {
			return TextureReference.EMPTY;
		}
	}
	
	public ParticleBreak(Vec2d pos, TileState ts) {
		super(pos, getTexture(ts), new Vec2d(1/4.0, 1/4.0));
		this.opaqueTile = ts.tile.opaqueTile;
		this.angle = RandomHelpers.randrange(rand, 360);
		
		Vec2d side_v = MathHelpers.moveTowards2(0.01, Math.toRadians(angle));
		velocity = new Vec3d(
				side_v.x, side_v.y,
				RandomHelpers.randrange(rand, 10000) / 200000.0);
	}
	
	@Override
	public void tick(Chunk chunk, Layer layer) {
		super.tick(chunk, layer);
		
		// Kill the particle if the player can't see it to reduce lag
		if(Main.player.pos.squareDistance(pos) > 32 || time < 0) {
			this.kill();
		}
		
		time -= 1;
		
		height += velocity.z;
		velocity.z -= MathHelpers.FallSpeed;
		
		if(height < -1) {
			kill();
		}
		
		else {
			pos.x += velocity.x;
			pos.y += velocity.y;
		}
	}
	
	@Override
	public void render(Vec2d pos, Camera camera, TextureReference tex, Vec2d size) {
		Vec3d light = chunk.getRGBLightLevel(new Vec2i(
				MathHelpers.floor(pos.x), MathHelpers.floor(pos.y)));
		GlHelpers.color3(light.x, light.y, light.z);
		GlHelpers.pushMatrix();
		GlHelpers.translate3(0, 0, height);
		super.render(pos, camera, tex, size);
		GlHelpers.popMatrix();
	}
}