/*
 * Copyright 2009 Google Inc.
 *
 * 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 com.google.jstestdriver.ui;

import com.google.jstestdriver.SlaveBrowser;

import java.awt.Dimension;
import java.awt.color.ColorSpace;
import java.awt.image.BufferedImage;
import java.awt.image.ColorConvertOp;
import java.io.IOException;
import java.util.Observable;
import java.util.Observer;

import javax.imageio.ImageIO;
import javax.swing.BoxLayout;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;

/**
 * @author alexeagle@google.com (Alex Eagle)
 */
public class CapturedBrowsersPanel extends JPanel implements Observer {
  private BrowserIcon chrome;
  private BrowserIcon ie;
  private BrowserIcon firefox;
//  private BrowserIcon opera;
  private BrowserIcon safari;
  private JLabel chromeLabel;
  private JLabel ieLabel;
  private JLabel firefoxLabel;
//  private JLabel operaLabel;
  private JLabel safariLabel;

  public CapturedBrowsersPanel() {
    try {
      chrome = BrowserIcon.buildFromResource("Chrome.png");
      ie = BrowserIcon.buildFromResource("IE.png");
      firefox = BrowserIcon.buildFromResource("Firefox.png");
//      opera = BrowserIcon.buildFromResource("Opera.png");
      safari = BrowserIcon.buildFromResource("Safari.png");
    } catch (IOException e) {
      throw new RuntimeException();
    }

    setLayout(new BoxLayout(this, BoxLayout.X_AXIS));

    chromeLabel = new JLabel(chrome.getGreyscaleIcon());
    ieLabel = new JLabel(ie.getGreyscaleIcon());
    firefoxLabel = new JLabel(firefox.getGreyscaleIcon());
//    operaLabel = new JLabel(opera.getGreyscaleIcon());
    safariLabel = new JLabel(safari.getGreyscaleIcon());
    add(chromeLabel);
    add(ieLabel);
    add(firefoxLabel);
    // TODO(jeremie): Support opera?
    //add(operaLabel);
    add(safariLabel);

    Dimension minimumSize = new Dimension(256 * 4, 256);
    setMinimumSize(minimumSize);
    setPreferredSize(minimumSize);
  }

  public void update(Observable observable, Object o) {
    SlaveBrowser slave = (SlaveBrowser) o;
    if (slave.getBrowserInfo().getName().contains("Firefox")) {
      firefoxLabel.setIcon(firefox.getColorIcon());
    } else if (slave.getBrowserInfo().getName().contains("Chrome")) {
      chromeLabel.setIcon(chrome.getColorIcon());
    } else if (slave.getBrowserInfo().getName().contains("Safari")) {
      safariLabel.setIcon(safari.getColorIcon());
    } else if (slave.getBrowserInfo().getName().contains("MSIE")) {
      ieLabel.setIcon(ie.getColorIcon());
    }
  }

  private static class BrowserIcon {
    private final BufferedImage color;
    private final BufferedImage greyscale;
    private ColorConvertOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null);

    public BrowserIcon(BufferedImage color) {
      this.color = color;
      greyscale = op.filter(color, null);
    }

    public static BrowserIcon buildFromResource(String resourceName) throws IOException {
      return new BrowserIcon(ImageIO.read(BrowserIcon.class.getResourceAsStream(resourceName)));
    }

    public Icon getColorIcon() {
      return new ImageIcon(color);
    }

    public Icon getGreyscaleIcon() {
      return new ImageIcon(greyscale);
    }
  }
}