/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2017 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
package org.lobobrowser.primary.ext;

import java.awt.Dimension;
import java.awt.Graphics;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import javax.swing.JProgressBar;

import org.lobobrowser.ua.ProgressType;

/**
 * The Class ProgressBar.
 */
public class ProgressBar extends JProgressBar {

	/** The Constant serialVersionUID. */
	private static final long serialVersionUID = 1L;

	/** The Constant logger. */
	private static final Logger logger = LogManager.getLogger(ProgressBar.class);

	/**
	 * Instantiates a new progress bar.
	 */
	public ProgressBar() {
		this.setStringPainted(true);
	}

	/**
	 * Update progress.
	 *
	 * @param progressType
	 *            the progress type
	 * @param value
	 *            the value
	 * @param max
	 *            the max
	 */
	public void updateProgress(ProgressType progressType, int value, int max) {
		switch (progressType) {
		case NONE:
		case DONE:
			this.setString("");
			this.setIndeterminate(false);
			this.setValue(0);
			this.setMaximum(0);
			break;
		default:
			if (max == -1) {
				this.setIndeterminate(true);
				this.setString(getSizeText(value));
			} else {
				this.setIndeterminate(false);
				this.setValue(value);
				this.setMaximum(max);
				if (max == 0) {
					this.setString("");
				} else {
					this.setString(((value * 100) / max) + "%");
				}
			}
			break;
		}
	}

	/**
	 * Round1.
	 *
	 * @param value
	 *            the value
	 * @return the double
	 */
	private static double round1(double value) {
		return Math.round(value * 10.0) / 10.0;
	}

	/**
	 * Gets the size text.
	 *
	 * @param numBytes
	 *            the num bytes
	 * @return the size text
	 */
	private static String getSizeText(int numBytes) {
		if (numBytes == 0) {
			return "";
		} else if (numBytes < 1024) {
			return numBytes + " bytes";
		} else {
			double numK = numBytes / 1024.0;
			if (numK < 1024) {
				return round1(numK) + " Kb";
			} else {
				double numM = numK / 1024.0;
				if (numM < 1024) {
					return round1(numM) + " Mb";
				} else {
					double numG = numM / 1024.0;
					return round1(numG) + " Gb";
				}
			}
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.JComponent#getMinimumSize()
	 */
	@Override
	public Dimension getMinimumSize() {
		return new Dimension(64, 18);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.JComponent#getMaximumSize()
	 */
	@Override
	public Dimension getMaximumSize() {
		return new Dimension(128, 100);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.JComponent#getPreferredSize()
	 */
	@Override
	public Dimension getPreferredSize() {
		return new Dimension(128, 18);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see javax.swing.JComponent#paintComponent(java.awt.Graphics)
	 */
	@Override
	protected void paintComponent(Graphics g) {
		try {
			super.paintComponent(g);
		} catch (Exception err) {
			logger.log(Level.ERROR, "paintComponent(): Swing bug?", err);
		}
	}
}