package com.onaro.sanscreen.client;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;
import java.util.Map;
import java.util.ResourceBundle;

import javax.swing.JComponent;
import javax.swing.JScrollPane;
import javax.swing.UIManager;

import org.w3c.dom.Element;

import com.onaro.commons.prefs.PreferencesWrapper;
import com.onaro.commons.swing.OnaroSwingUtilities;
import com.onaro.sanscreen.client.prefs.ClientPrefs;
import com.onaro.sanscreen.client.view.ActionFactory;
import com.onaro.util.jfc.collapsible.CollapsiblePane;
import com.onaro.util.jfc.collapsible.CollapsiblePanels;
import com.onaro.util.jfc.collapsible.HyperlinkButton;

public class LegacyShortcutManager extends ShortcutManager {
	
    /**
     * Map from the group id to the button for the group;
     */
	private Map<String,CollapsiblePane> groupIdToGroupMap;
	
    /**
     * Contains all shortcut groups.
     */
    private JScrollPane scroll;
    
    private CollapsiblePanels groupPanels;
    
    private Element shortcutsElement;
    
    private ResourceBundle resources;
    
    private boolean initialized = false;

    /**
     * The preferneces for this class's package, used to restore user preferences.
     */
    static final PreferencesWrapper preferences = ClientPrefs.getClient();

	public LegacyShortcutManager(ActionFactory actionFactory, Element shortcutsElement, ResourceBundle resources) {
		super(actionFactory);
		this.shortcutsElement = shortcutsElement;
		this.resources = resources;
		groupIdToGroupMap = new HashMap<String,CollapsiblePane>();
	}
	
	private void initialize() {
		if (!initialized) {
	        addShortcutGroup(shortcutsElement, resources);
	        processShortcutExtensions();
	        
	        OnaroSwingUtilities.invokeNowOrLater(new Runnable() {
				public void run() {
			        for (CollapsiblePane group : groupIdToGroupMap.values()) {
			        	String groupId = group.getName();
			        	
			        	group.setExpanded(preferences.getBoolean(groupId, false));
			        }
				}
	        });
	        
			initialized = true;
		}
	}

	@Override
	protected void addShortcutComponent(ShortcutAction shortcutAction) {
        String groupId = shortcutAction.getGroupId();
        // Retrieve the appropriate group for this action
        CollapsiblePane group = groupIdToGroupMap.get(groupId);
        
        // Create the shortcut button
        HyperlinkButton button = new HyperlinkButton(shortcutAction);
        button.setName(shortcutAction.getId());
                
        group.add(button);
	}

	@Override
	protected void addShortcutGroupComponent(ShortcutGroupAction shortcutGroupAction) {
        String groupId = shortcutGroupAction.getGroupId();
        
        // Get the display name of the group from the action
        final String groupName = (String) shortcutGroupAction.getValue(ShortcutGroupAction.NAME);
        
        // Create the group's collapsible pane
        final CollapsiblePane groupPane = new CollapsiblePane(groupName);
        groupPane.setName(groupId);

        // Register the group in the map
        groupIdToGroupMap.put(groupId, groupPane);

        // Add the group to the groups panel
        getGroupPanels().add(groupPane);
        
        groupPane.addExpandedActionListener(new ExpandedStateRecorder(groupId));
	}
	
	private CollapsiblePanels getGroupPanels() {
		if (groupPanels == null) {
			groupPanels = new CollapsiblePanels();
            groupPanels.setBackground(UIManager.getDefaults().getColor("BasicPanel.background")); //$NON-NLS-1$
		}
		return groupPanels;
	}
	
	private JScrollPane getScroll() {
		if (scroll == null) {
			scroll = new JScrollPane();
			scroll.setViewportView(getGroupPanels());
	        scroll.setBorder(UIManager.getDefaults().getBorder("BasicPanel.border")); //$NON-NLS-1$
	        scroll.getVerticalScrollBar().setUnitIncrement(15);
		}
		return scroll;
	}
	
    /**
     * Gets the shortcut panel.
     * @return the view
     */
    public JComponent getComponent() {
    	initialize();
        return getScroll();
    }
    
    private class ExpandedStateRecorder implements ActionListener {

        String groupId;

        public ExpandedStateRecorder(String groupId) {
            this.groupId = groupId;
        }

        public void actionPerformed(ActionEvent e) {
            preferences.putBoolean(groupId, ((CollapsiblePane)e.getSource()).isExpanded());
        }
    }

}