// License: GPL. For details, see Readme.txt file.
package org.openstreetmap.gui.jmapviewer;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.List;

import javax.swing.JLabel;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.JSplitPane;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;

import org.openstreetmap.gui.jmapviewer.checkBoxTree.CheckBoxNodePanel;
import org.openstreetmap.gui.jmapviewer.checkBoxTree.CheckBoxTree;
import org.openstreetmap.gui.jmapviewer.interfaces.MapObject;

/**
 * Tree of layers for JMapViewer component
 * @author galo
 */
public class JMapViewerTree extends JPanel {
    /** Serial Version UID */
    private static final long serialVersionUID = 3050203054402323972L;

    private JMapViewer map;
    private CheckBoxTree tree;
    private JPanel treePanel;
    private JSplitPane splitPane;

    public JMapViewerTree(String name) {
        this(name, false);
    }

    public JMapViewerTree(String name, boolean treeVisible) {
        super();
        splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT);

        tree = new CheckBoxTree(name);
        treePanel = new JPanel(new BorderLayout());
        treePanel.add(tree, BorderLayout.CENTER);
        treePanel.add(new JLabel("<html><center>Use right mouse button to<br />show/hide texts</center></html>"), BorderLayout.SOUTH);
        map = new JMapViewer();

        splitPane.setOneTouchExpandable(true);
        splitPane.setDividerLocation(150);

        //Provide minimum sizes for the two components in the split pane
        Dimension minimumSize = new Dimension(100, 50);
        //tree.setMinimumSize(minimumSize);
        map.setMinimumSize(minimumSize);
        createRefresh();
        setLayout(new BorderLayout());
        setTreeVisible(treeVisible);
        tree.addNodeListener(new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
                maybeShowPopup(e);
            }

            @Override
            public void mouseReleased(MouseEvent e) {
                maybeShowPopup(e);
            }

            private void maybeShowPopup(MouseEvent e) {
                if (e.isPopupTrigger()) {
                    AbstractLayer layer = ((CheckBoxNodePanel) e.getComponent()).getData().getAbstractLayer();
                    if (layer != null)
                        JMapViewerTree.this.createPopupMenu(layer).show(e.getComponent(), e.getX(), e.getY());
                }
            }
        });
    }

    private JPopupMenu createPopupMenu(final AbstractLayer layer) {
        JMenuItem menuItemShow = new JMenuItem("show texts");
        JMenuItem menuItemHide = new JMenuItem("hide texts");

        //Create the popup menu.
        JPopupMenu popup = new JPopupMenu();

        // Create items
        if (layer.isVisibleTexts() == null) {
            popup.add(menuItemShow);
            popup.add(menuItemHide);
        } else if (layer.isVisibleTexts()) popup.add(menuItemHide);
        else popup.add(menuItemShow);

        menuItemShow.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                setVisibleTexts(layer, true);
                if (layer.getParent() != null) layer.getParent().calculateVisibleTexts();
                map.repaint();
            }
        });
        menuItemHide.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent arg0) {
                setVisibleTexts(layer, false);
                if (layer.getParent() != null) layer.getParent().calculateVisibleTexts();
                map.repaint();
            }
        });

        return popup;
    }

    private static void setVisibleTexts(AbstractLayer layer, boolean visible) {
        layer.setVisibleTexts(visible);
        if (layer instanceof LayerGroup) {
            LayerGroup group = (LayerGroup) layer;
            if (group.getLayers() != null)
                for (AbstractLayer al: group.getLayers()) {
                    setVisibleTexts(al, visible);
                }
        }
    }

    public Layer addLayer(String name) {
        Layer layer = new Layer(name);
        this.addLayer(layer);
        return layer;
    }

    public JMapViewerTree addLayer(Layer layer) {
        tree.addLayer(layer);
        return this;
    }

    public JMapViewerTree addLayer(MapObject element) {
        //element.getLayer().add(element);
        return addLayer(element.getLayer());
    }

    public Layer removeFromLayer(MapObject element) {
        element.getLayer().getElements().remove(element);
        return element.getLayer();
    }

    public static int size(List<?> list) {
        return list == null ? 0 : list.size();
    }

    public JMapViewer getViewer() {
        return map;
    }

    public CheckBoxTree getTree() {
        return tree;
    }

    public void addMapObject(MapObject o){

    }

    public void setTreeVisible(boolean visible) {
        removeAll();
        revalidate();
        if (visible) {
            splitPane.setLeftComponent(treePanel);
            splitPane.setRightComponent(map);
            add(splitPane, BorderLayout.CENTER);
        } else add(map, BorderLayout.CENTER);
        repaint();
    }

    private void createRefresh() {
        tree.getModel().addTreeModelListener(new TreeModelListener() {
            @Override
            public void treeNodesChanged(final TreeModelEvent e) {
                repaint();
            }

            @Override
            public void treeNodesInserted(TreeModelEvent arg0) {
                // TODO Auto-generated method stub
            }

            @Override
            public void treeNodesRemoved(TreeModelEvent arg0) {
                // TODO Auto-generated method stub
            }

            @Override
            public void treeStructureChanged(TreeModelEvent arg0) {
                // TODO Auto-generated method stub
            }
        });
    }
}