/**
 *
 */
package com.jotuntech.sketcher.client.command;

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.client.UserInterface;
import com.jotuntech.sketcher.common.User;

/**
 * @author Thor Harald Johansen
 *
 */
public class SignInCommand implements Command {
	Integer peerKey;
	String login;
	String password;
	boolean viewer;

	public SignInCommand() {

	}

	public SignInCommand(Integer peerKey, String login, String password, boolean viewer) {
		this.peerKey = peerKey;
		this.login = login;
		this.password = password;
		this.viewer = viewer;
	}

	public void decode(ByteBuffer in) {
		peerKey = in.getInt();
		viewer = in.get() != 0;
		int loginLength = (in.get() & 0xFF) + 1;
		StringBuffer loginBuffer = new StringBuffer();
		for(int i = 0; i < loginLength; i++) {
			loginBuffer.append(in.getChar());
		}
		login = loginBuffer.toString();

		StringBuffer passwordBuffer = new StringBuffer();
		while(in.remaining() >= 2) {
			passwordBuffer.append(in.getChar());
		}
		password = passwordBuffer.toString();
	}

	public void encode(ByteBuffer out) {
		out.putInt(peerKey);
		out.put((byte) (viewer ? 0xFF : 0x00));
		out.put((byte) (login.length() - 1));
		for(int i = 0; i < login.length(); i++) {
			out.putChar(login.charAt(i));
		}
		for(int i = 0; i < password.length(); i++) {
			out.putChar(password.charAt(i));
		}
	}

	public int perform(Client client, User user) {
		/** Create user */
		user = new User(login);

		/** Set viewer flag */
		user.setViewer(viewer);

		/** Put user in client user map */
		client.getUserMap().put(peerKey, user);

		if(client.getConnection().getUser() == null) {
			/** Assign user to client */
			client.getConnection().setUser(user);

			/** Select a default brush */
			client.getUserInterface().getBrushButtons()[0].doClick();
		}

		/** Add canvas as phantom layer listener */
		user.getPhantomLayer().addImageObserver(client.getCanvas());

		/** Print message */
		client.getUserInterface().println(user.getName() + " has signed in");

		/** Play audio */
		if(client.isSoundEnabled()) {
			UserInterface.AUDIO_SIGN_IN.play();
		}

		/** Return silently */
		return Connection.SEND_NONE;
	}
}