package com.jotuntech.sketcher.client.command;

import java.awt.AlphaComposite;
import java.nio.ByteBuffer;

import com.jotuntech.sketcher.client.Client;
import com.jotuntech.sketcher.client.Command;
import com.jotuntech.sketcher.client.Connection;
import com.jotuntech.sketcher.common.BitmapLayer;
import com.jotuntech.sketcher.common.Layer;
import com.jotuntech.sketcher.common.User;

public class MoveCommand implements Command {
	private float sx, sy, dx, dy, w, h;
	
	public MoveCommand() {
		
	}
	
	public MoveCommand(float sx, float sy, float dx, float dy, float w, float h) {
		this.sx = sx;
		this.sy = sy;
		this.dx = dx;
		this.dy = dy;
		this.w = w;
		this.h = h;
	}
	
	public int perform(Client client, User user) {
		if(user == null || user.getLayer() == null) {
			return Connection.SEND_NONE;
		}

		if(user.isViewer()) {
			return Connection.SEND_NONE;
		}
		
		if(user.getPhantomLayer().isEmpty()) {
			Layer pl = (BitmapLayer) user.getPhantomLayer();
			pl.setAlphaRule(AlphaComposite.SRC_OVER);
			pl.setOpacity(1);
			user.getLayer().copyTo(pl, null, false, sx, sy, dx, dy, w, h);
		} else {
			user.getPhantomLayer().copyTo(user.getPhantomLayer(), user.getLayer().getImageObserver(), true, sx, sy, dx, dy, w, h);
			user.getPhantomLayer().clean();
		}
		
		return Connection.SEND_OTHERS;
	}

	public void decode(ByteBuffer in) {
		sx = in.getFloat();
		sy = in.getFloat();
		dx = in.getFloat();
		dy = in.getFloat();
		w = in.getFloat();
		h = in.getFloat();
	}

	public void encode(ByteBuffer out) {
		out.putFloat(sx);
		out.putFloat(sy);
		out.putFloat(dx);
		out.putFloat(dy);
		out.putFloat(w);
		out.putFloat(h);
	}
}