/*
 * 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 org.apache.jmeter.gui.action;

import java.awt.event.ActionEvent;
import java.io.File;
import java.util.HashSet;
import java.util.Set;

import javax.swing.JComponent;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;

import org.apache.jmeter.exceptions.IllegalUserActionException;
import org.apache.jmeter.gui.GuiPackage;
import org.apache.jmeter.gui.JMeterGUIComponent;
import org.apache.jmeter.gui.util.FileDialoger;
import org.apache.jmeter.save.SaveGraphicsService;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.visualizers.Printable;

/**
 * SaveGraphics action is meant to be a generic reusable Action. The class will
 * use GUIPackage to get the current gui. Once it does, it checks to see if the
 * element implements Printable interface. If it does, it call getPrintable() to
 * get the JComponent. By default, it will use SaveGraphicsService to save a PNG
 * file if no extension is provided. If either .png or .tif is in the filename,
 * it will call SaveGraphicsService to save in the format.
 */
public class SaveGraphics extends AbstractAction {

    private static final Set<String> commands = new HashSet<>();

    static {
        commands.add(ActionNames.SAVE_GRAPHICS);
        commands.add(ActionNames.SAVE_GRAPHICS_ALL);
    }

    private static final String[] extensions
        = { SaveGraphicsService.TIFF_EXTENSION, SaveGraphicsService.PNG_EXTENSION };

    /**
     * Constructor for the Save object.
     */
    public SaveGraphics() {
    }

    /**
     * Gets the ActionNames attribute of the Save object.
     *
     * @return the ActionNames value
     */
    @Override
    public Set<String> getActionNames() {
        return commands;
    }

    @Override
    public void doAction(ActionEvent e) throws IllegalUserActionException {
        if (!commands.contains(e.getActionCommand())) {
            throw new IllegalUserActionException("Invalid user command:" + e.getActionCommand());
        }
        if (e.getActionCommand().equals(ActionNames.SAVE_GRAPHICS)) {
            JMeterGUIComponent component = GuiPackage.getInstance().getCurrentGui();
            // get the JComponent from the visualizer
            if (component instanceof Printable) {
                JComponent comp = ((Printable) component).getPrintableComponent();
                saveImage(comp);
            }
        }
        if (e.getActionCommand().equals(ActionNames.SAVE_GRAPHICS_ALL)) {
            JMeterGUIComponent component = GuiPackage.getInstance().getCurrentGui();
            JComponent comp = ((JComponent) component).getRootPane();
            saveImage(comp);
        }
    }

    private void saveImage(JComponent comp) {

        String filename;
        JFileChooser chooser = FileDialoger.promptToSaveFile(
                GuiPackage.getInstance().getTreeListener().getCurrentNode().getName(),
                extensions);
        if (chooser == null) {
            return;
        }
        // Get the string given from the choose and check
        // the file extension.
        filename = chooser.getSelectedFile().getAbsolutePath();
        if (filename != null) {
            File f = new File(filename);
            if (f.exists()) {
                int response = JOptionPane.showConfirmDialog(GuiPackage.getInstance().getMainFrame(),
                        JMeterUtils.getResString("save_overwrite_existing_file"), // $NON-NLS-1$
                        JMeterUtils.getResString("save?"),  // $NON-NLS-1$
                        JOptionPane.YES_NO_OPTION,
                        JOptionPane.QUESTION_MESSAGE);
                if (response == JOptionPane.CLOSED_OPTION || response == JOptionPane.NO_OPTION) {
                    return; // Do not save, user does not want to overwrite
                }
            }
            SaveGraphicsService save = new SaveGraphicsService();
            String ext = filename.substring(filename.length() - 4);
            String name = filename.substring(0, filename.length() - 4);
            if (ext.equals(SaveGraphicsService.PNG_EXTENSION)) {
                save.saveJComponent(name, SaveGraphicsService.PNG, comp);
            } else if (ext.equals(SaveGraphicsService.TIFF_EXTENSION)) {
                save.saveJComponent(name, SaveGraphicsService.TIFF, comp);
            } else {
                save.saveJComponent(filename, SaveGraphicsService.PNG, comp);
            }
        }
    }
}
