// $Header: /home/cvs/jakarta-jmeter/src/monitor/components/org/apache/jmeter/visualizers/ServerPanel.java,v 1.4 2004/03/20 22:10:02 sebb Exp $
/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed 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 org.apache.jmeter.visualizers;

import java.awt.Dimension;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JLabel;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.monitor.util.Stats;

/**
 * The purpose of ServerPanel is to display an unique
 * server and its current status. The server label
 * consist of the protocol, host and port. For example,
 * a system with multiple Tomcat's running on different
 * ports would be different ServerPanel.
 */
public class ServerPanel extends JPanel
	implements MonitorGuiListener
{

	private JLabel serverField;
	private JLabel timestampField;
	/**
	 * Preference size for the health icon
	 */
	private Dimension prefsize = new Dimension(25,75);
	private JLabel healthIcon;
	private JLabel loadIcon;

	/**
	 * Health Icons
	 */
	public static final ImageIcon HEALTHY =
		JMeterUtils.getImage("monitor-healthy.gif");
	public static final ImageIcon ACTIVE =
		JMeterUtils.getImage("monitor-active.gif");
	public static final ImageIcon WARNING =
		JMeterUtils.getImage("monitor-warning.gif");
	public static final ImageIcon DEAD =
		JMeterUtils.getImage("monitor-dead.gif");
	/**
	 * Load Icons
	 */
	public static final ImageIcon LOAD_1 =
		JMeterUtils.getImage("monitor-load-1.gif");
	public static final ImageIcon LOAD_2 =
		JMeterUtils.getImage("monitor-load-2.gif");
	public static final ImageIcon LOAD_3 =
		JMeterUtils.getImage("monitor-load-3.gif");
	public static final ImageIcon LOAD_4 =
		JMeterUtils.getImage("monitor-load-4.gif");
	public static final ImageIcon LOAD_5 =
		JMeterUtils.getImage("monitor-load-5.gif");
	public static final ImageIcon LOAD_6 =
		JMeterUtils.getImage("monitor-load-6.gif");
	public static final ImageIcon LOAD_7 =
		JMeterUtils.getImage("monitor-load-7.gif");
	public static final ImageIcon LOAD_8 =
		JMeterUtils.getImage("monitor-load-8.gif");
	public static final ImageIcon LOAD_9 =
		JMeterUtils.getImage("monitor-load-9.gif");
	public static final ImageIcon LOAD_10 =
		JMeterUtils.getImage("monitor-load-10.gif");
	
	//private MonitorModel DATA;
	
    /**
     * 
     */
    public ServerPanel(MonitorModel model)
    {
        super();
        //DATA = model;
        init(model);
    }

    /**
     * 
     * @deprecated Only for use in unit testing
     */
    public ServerPanel()
	{
    	//log.warn("Only for use in unit testing");
    }

    /**
	 * Init will create the JLabel widgets for the
	 * host, health, load and timestamp.
	 * @param model
	 */
	private void init(MonitorModel model)
	{
		this.setLayout(new FlowLayout());
		serverField = new JLabel(model.getURL());
		this.add(serverField);
		healthIcon = new JLabel(getHealthyImageIcon(model.getHealth()));
		healthIcon.setPreferredSize(prefsize);
		this.add(healthIcon);
		loadIcon = new JLabel(getLoadImageIcon(model.getLoad()));
		this.add(loadIcon);
		timestampField = new JLabel(model.getTimestampString());
		this.add(timestampField);
	}
	
	/**
	 * Static method for getting the right ImageIcon for
	 * the health.
	 * @param health
	 * @return image for the status
	 */
	public static ImageIcon getHealthyImageIcon(int health){
		ImageIcon i = null;
		switch(health){
			case Stats.HEALTHY:
				i = HEALTHY;
				break;
			case Stats.ACTIVE:
				i = ACTIVE;
				break;
			case Stats.WARNING:
				i = WARNING;
				break;
			case Stats.DEAD:
				i = DEAD;
				break;
		}
		return i;
	}
	
	/**
	 * Static method looks up the right ImageIcon from
	 * the load value.
	 * @param load
	 * @return image for the load
	 */
	public static ImageIcon getLoadImageIcon(int load){
		if (load <= 10){
			return LOAD_1;
		} else if (load > 10 && load <= 20){
			return LOAD_2;
		} else if (load > 20 && load <= 30){
			return LOAD_3;
		} else if (load > 30 && load <= 40){
			return LOAD_4;
		} else if (load > 40 && load <= 50){
			return LOAD_5;
		} else if (load > 50 && load <= 60){
			return LOAD_6;
		} else if (load > 60 && load <= 70){
			return LOAD_7;
		} else if (load > 70 && load <= 80){
			return LOAD_8;
		} else if (load > 80 && load <= 90){
			return LOAD_9;
		} else {
			return LOAD_10;
		}
	}
	
	/**
	 * Method will update the ServerPanel's health, load,
	 * and timestamp. For efficiency, it uses the static
	 * method to lookup the images.
	 */
	public void updateGui(MonitorModel stat){
		//this.DATA = null;
		//this.DATA = stat;
		loadIcon.setIcon(getLoadImageIcon(stat.getLoad()));
		healthIcon.setIcon(getHealthyImageIcon(stat.getHealth()));
		timestampField.setText(stat.getTimestampString());
		this.updateGui();
	}
	
	/**
	 * update the gui
	 */
	public void updateGui(){
		this.repaint();
	}
}