/*
 * #%L
 * org.gitools.ui.app
 * %%
 * Copyright (C) 2013 - 2014 Universitat Pompeu Fabra - Biomedical Genomics group
 * %%
 * 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 version 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 Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */
package org.gitools.ui.app.actions;

import org.apache.commons.lang.ArrayUtils;
import org.gitools.api.components.IEditor;
import org.gitools.heatmap.Bookmark;
import org.gitools.heatmap.Bookmarks;
import org.gitools.heatmap.Heatmap;
import org.gitools.ui.app.dialog.BookmarkEditPage;
import org.gitools.ui.app.heatmap.editor.HeatmapEditor;
import org.gitools.ui.core.Application;
import org.gitools.ui.core.actions.HeatmapAction;
import org.gitools.ui.core.actions.IPanelAction;
import org.gitools.ui.platform.IconUtils;
import org.gitools.ui.platform.icons.IconNames;
import org.gitools.ui.platform.wizard.PageDialog;

import javax.swing.*;
import javax.swing.event.ListDataEvent;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;


//FIXME: always two listeners.

public class BookmarksDropdown extends HeatmapAction implements IPanelAction, PropertyChangeListener {

    private JComboBox<Bookmark> bookmarkComboBox;
    private JPanel bookmarksSelectPanel;
    private Bookmarks bookmarks;
    private static Bookmark NO_OPTION = new Bookmark();

    public BookmarksDropdown() {
        super("Bookmarks dropdown");

        bookmarksSelectPanel.setVisible(false);

        bookmarkComboBox.setRenderer(new BookmarkCellRenderer());

        bookmarkComboBox.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                bookmarkComboBox.getModel().setSelectedItem(NO_OPTION);
            }
        });
    }


    @Override
    protected boolean isEnabledByEditor(IEditor editor) {
        if (!(editor instanceof HeatmapEditor)) {
            bookmarksSelectPanel.setVisible(false);
            bookmarksSelectPanel.repaint();
            return false;
        } else {
            return isEnabledByModel(editor.getModel());
        }
    }

    @Override
    public boolean isEnabledByModel(Object model) {

        if (model instanceof Heatmap) {
            Bookmarks b = ((Heatmap) model).getBookmarks();
            b.addPropertyChangeListener(Bookmarks.PROPERTY_CONTENTS, this);
            setBookmarks(b);
            bookmarksSelectPanel.repaint();
            return true;

        }
        bookmarksSelectPanel.setVisible(false);
        bookmarksSelectPanel.repaint();
        return false;
    }

    private void setBookmarks(final Bookmarks bookmarks) {
        this.bookmarks = bookmarks;
        Bookmark[] bookmarkArray = bookmarks.getAll().toArray(new Bookmark[bookmarks.getAll().size()]);
        bookmarksSelectPanel.setVisible(bookmarks.getAll().size() > 0);
        if (bookmarks.getAll().size() == 0) return;

        NO_OPTION.setName(String.valueOf(bookmarkArray.length) + (bookmarkArray.length > 1 ? " Bookmarks:" : " Bookmark:"));
        bookmarkArray = (Bookmark[]) ArrayUtils.add(bookmarkArray, 0, NO_OPTION);
        bookmarkComboBox.setModel(new DefaultComboBoxModel<>(bookmarkArray));
        bookmarkComboBox.getModel().setSelectedItem(NO_OPTION);

    }

    @Override
    public JPanel getPanel() {
        bookmarksSelectPanel.setOpaque(false);
        return bookmarksSelectPanel;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        // Nothing
    }

    @Override
    public void propertyChange(PropertyChangeEvent evt) {
        if (!bookmarks.equals(evt.getNewValue())) {
            bookmarks.removePropertyChangeListener(this);
        }
        setBookmarks(getHeatmap().getBookmarks());
        bookmarkComboBox.contentsChanged(new ListDataEvent(evt, 0, 0, 0));
        bookmarksSelectPanel.revalidate();
        bookmarksSelectPanel.repaint();
    }


    class BookmarkCellRenderer extends DefaultListCellRenderer {


        Icon icon;
        JPanel panel;
        JButton btn;
        Bookmark bookmark;
        //so we will install the mouse listener once
        boolean isFirst = true;


        BookmarkCellRenderer() {
            super();
            panel = new JPanel(new BorderLayout());
            icon = IconUtils.getIconResource(IconNames.edit16);
            btn = new JButton(icon);
            btn.setPreferredSize(new Dimension(icon.getIconWidth(), icon.getIconHeight()));
            panel.add(btn, BorderLayout.WEST);


            panel.addMouseListener(new MouseAdapter() {


                @Override
                public void mousePressed(MouseEvent e) {

                    e.consume();

                    if (!bookmark.equals(NO_OPTION) && clickOnButon(e.getX())) {


                        BookmarkEditPage page = new BookmarkEditPage(getHeatmap(),
                                bookmark,
                                false);
                        PageDialog dialog = new PageDialog(Application.get(), page);
                        dialog.open();

                        if (dialog.isCancelled()) {
                            return;
                        }

                        if (page.isDelete()) {
                            bookmarks.removeBookmark(page.getBookmark());
                            Application.get().showNotification("Bookmark " + bookmark.getName() + " removed.");
                        } else {
                            bookmarks.removeBookmark(bookmark);
                            bookmarks.add(page.getBookmark());
                        }

                    } else {
                        if (!bookmark.equals(NO_OPTION)) {
                            getHeatmap().applyBookmark(bookmark);
                            Application.get().showNotificationPermanent("Bookmark " + bookmark.getName() + " applied.");
                        }
                    }

                }
            });
        }

        private boolean clickOnButon(int x) {
            return btn.getX() + btn.getWidth() > x;
        }

        @Override
        public Component getListCellRendererComponent(JList<?> list, Object value, int index, boolean isSelected, boolean cellHasFocus) {

            if (isSelected) {
                bookmark = (Bookmark) value;
            }

            Component comp = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
            if (value != null && value.equals(NO_OPTION) && bookmarkComboBox.isPopupVisible()) {

                setForeground(Color.LIGHT_GRAY);

            }

            if (value != null && !value.equals(NO_OPTION)) {
                panel.add(comp);

                if (isFirst) {
                    isFirst = false;
                    list.addMouseListener(new MouseAdapter() {

                        @Override
                        public void mousePressed(MouseEvent e) {
                            panel.dispatchEvent(e);
                            e.consume();
                        }
                    });
                }

                return panel;
            }

            return comp;
        }
    }

}

