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.User;
import com.jotuntech.sketcher.common.filter.Filter;

public class FilterCommand implements Command {
	private Filter filter;
	private int x, y, w, h;
	float a, b, c;
	
	public FilterCommand() {
		
	}
	
	public FilterCommand(Filter filter, float x, float y, float w, float h, float a, float b, float c) {
		this.filter = filter;
		this.x = (int) x;
		this.y = (int) y;
		this.w = (int) w;
		this.h = (int) h;
		this.a = a;
		this.b = b;
		this.c = c;
	}

	public int perform(Client client, User user) {
		if(user == null) {
			return Connection.SEND_NONE;
		}
		
		BitmapLayer pl = (BitmapLayer) user.getPhantomLayer();
		filter.setSize(w, h);
		filter.setParameterA(a);
		user.getLayer().copyTo(pl, null, false, x, y, x, y, w, h);
		pl.setAlphaRule(AlphaComposite.SRC);
		pl.setOpacity(1);
		pl.applyFilter(filter, user.getLayer().getImageObserver(), x, y, w, h);
		return Connection.SEND_OTHERS;
	}

	public void decode(ByteBuffer in) {
		x = (int) in.getFloat();
		y = (int) in.getFloat();
		w = (int) in.getFloat();
		h = (int) in.getFloat();
		a = in.getFloat();
		b = in.getFloat();
		c = in.getFloat();

		StringBuffer filterNameBuffer = new StringBuffer();
		while(in.remaining() >= 2) {
			filterNameBuffer.append(in.getChar());
		}
		String filterName = "com.jotuntech.sketcher.common.filter." + filterNameBuffer.toString();
		try {
			filter = (Filter) Class.forName(filterName).newInstance();
		} catch (Throwable t) {
			t.printStackTrace();
		}
	}

	public void encode(ByteBuffer out) {
		out.putFloat(x);
		out.putFloat(y);
		out.putFloat(w);
		out.putFloat(h);
		out.putFloat(a);
		out.putFloat(b);
		out.putFloat(c);
		String filterName = filter.getClass().getSimpleName();
		for(int i = 0; i < filterName.length(); i++) {
			out.putChar(filterName.charAt(i));
		}
	}
}