package com.onaro.sanscreen.client.view.dashboard;

import java.awt.Dimension;
import java.awt.event.MouseEvent;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.ArrayList;
import java.util.List;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPopupMenu;
import javax.swing.UIManager;

import com.onaro.commons.swing.PopupMenuMouseListener;
import com.onaro.commons.util.MessageManager;
import com.onaro.sanscreen.client.SANscreenClientPlugin;
import com.onaro.sanscreen.server.dataobject.DashboardInfo;
import com.onaro.util.jfc.ConfigurableAction;
import com.onaro.util.jfc.GradiantLabel;
import com.onaro.util.jfc.SelectableCheckBoxMenuItem;

/**
 * The dashboard displays a list of counters displaying summary information on the SAN and/or SANscreen. Each of the
 * counter consists of an icon, label and the actual data. Once a counter is being clicked, it causes SANscreen to
 * navigate to the appropriate view.
 */
public class Dashboard extends JPanel {

	private static final long serialVersionUID = 1L;

	public static final Messages MESSAGES = MessageManager.getMessages(Messages.class);

	private List<DashboardItem> items;

	private JPopupMenu popupMenu;

	private ConfigurableAction popupAction;
	
	private PropertyChangeListener myDashboardManagerPropertyChangeListener;

	public Dashboard() {

		initialize();
	}

	private void initialize() {

		setBackground(UIManager.getDefaults().getColor("Table.background")); //$NON-NLS-1$
		setBorder(UIManager.getDefaults().getBorder("BasicPanel.border")); //$NON-NLS-1$

		BoxLayout layout = new BoxLayout(this, BoxLayout.Y_AXIS);

		setLayout(layout);

        Dimension maxSize = new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
        JLabel productLabel = GradiantLabel.createLogoLabel(MESSAGES.getDashboardBannerText(SANscreenClientPlugin.getDefault().getBranding().getProductName()));
        productLabel.setMaximumSize(maxSize);
		add(productLabel);

		PopupListener popupListener = new PopupListener();
		
		for (DashboardItem item : getItems()) {
            add(Box.createVerticalStrut(3));
			JButton dashboardHyperlink = item.getDashboardHyperlink();
            dashboardHyperlink.setMaximumSize(maxSize);
			dashboardHyperlink.addMouseListener(popupListener);
			add(dashboardHyperlink);
		}

		addMouseListener(popupListener);
		
		getDashboardManager().addPropertyChangeListener(DashboardManager.PROP_DASHBOARD_INFO, getMyDashboardManagerPropertyChangeListener());
	}
	
	private PropertyChangeListener getMyDashboardManagerPropertyChangeListener() {
		if (myDashboardManagerPropertyChangeListener == null) {
			myDashboardManagerPropertyChangeListener = new MyDashboardManagerPropertyChangeListener();
		}
		
		return myDashboardManagerPropertyChangeListener;
	}
	
	protected DashboardManager getDashboardManager() {
		return DashboardManager.getInstance();
	}
	
	class MyDashboardManagerPropertyChangeListener implements PropertyChangeListener {

		public void propertyChange(PropertyChangeEvent evt) {
			DashboardInfo dashboardInfo = getDashboardManager().getDashboardInfo();
			update(dashboardInfo);
		}
		
	}

	List<DashboardItem> getItems() {

		List<DashboardItemType> itemTypes = DashboardManager.getInstance().getDashboardItemTypes();

		if (items == null) {

			items = new ArrayList<>();

			for (DashboardItemType type : itemTypes) {
				DashboardItem item = type.createDashboardItem();
				items.add(item);
			}
		}

		return items;
	}
	
	public void dispose() {
		getDashboardManager().removePropertyChangeListener(DashboardManager.PROP_DASHBOARD_INFO, getMyDashboardManagerPropertyChangeListener());
	}

	void update(DashboardInfo info) {
		List<DashboardItem> items = getItems();

		for (DashboardItem item : items) {
			item.update(info);
		}
		repaint();
	}

	JPopupMenu getPopupMenu() {
		if (popupMenu == null) {

			popupMenu = new JPopupMenu();
			for (DashboardItem item : items) {
				popupMenu.add(item.getControlMenuItem());
			}

			ConfigurableAction popupAction = getPopupAction();

			if (popupAction != null) {
				popupMenu.addSeparator();

				popupMenu.add(new SelectableCheckBoxMenuItem(popupAction));
			}

		}

		return popupMenu;
	}

	class PopupListener extends PopupMenuMouseListener {

		@Override
		public JPopupMenu getPopupMenu(MouseEvent mouseEvent) {
			return Dashboard.this.getPopupMenu();
		}

	}

	public final ConfigurableAction getPopupAction() {
		return popupAction;
	}

	public final void setPopupAction(ConfigurableAction popupAction) {
		this.popupAction = popupAction;
	}
}