// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.consoleproxy;

import java.awt.Image;
import java.util.List;

/**
 * @author Kelven Yang
 * ConsoleProxyClient defines an standard interface that a console client should implement,
 * 
 * ConsoleProxyClient maintains a session towards the target host, it glues the session
 * to a AJAX front-end viewer 
 */
public interface ConsoleProxyClient {
	int getClientId();
	
	//
	// Quick status
	//
	boolean isHostConnected();
	boolean isFrontEndAlive();

	//
	// AJAX viewer
	//
	long getAjaxSessionId();
	AjaxFIFOImageCache getAjaxImageCache();
	Image getClientScaledImage(int width, int height);					// client thumbnail support
	
	String onAjaxClientStart(String title, List<String> languages, String guest);
	String onAjaxClientUpdate();
	String onAjaxClientKickoff();

	//
	// Input handling
	//
	void sendClientRawKeyboardEvent(InputEventType event, int code, int modifiers);
	void sendClientMouseEvent(InputEventType event, int x, int y, int code, int modifiers);

	//
	// Info/Stats
	//
	long getClientCreateTime();
	long getClientLastFrontEndActivityTime();
	String getClientHostAddress();
	int getClientHostPort();
	String getClientHostPassword();
	String getClientTag();

	//
	// Setup/house-keeping
	//
	void initClient(ConsoleProxyClientParam param);
	void closeClient();
}