import java.util.ArrayList;

import java.util.List;

import org.eclipse.jface.action.Action;

import org.eclipse.jface.action.IAction;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

import org.eclipse.jface.resource.ImageDescriptor;

import org.eclipse.swt.SWT;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.widgets.Composite;

import com.nokia.carbide.internal.discovery.ui.extension.IPortalPageLayer;

import com.nokia.carbide.internal.discovery.ui.extension.IPortalPageLayer.IActionBar;

public class PortalPage implements IActionBar {

	private class ChangeLayerAction extends Action {

		private Layer layer;

		private ChangeLayerAction(Layer layer) {

			super(layer.getLayer().getTitle());

			this.layer = layer;

		}

		public void run() {

			setCurrentLayer(layer);

		}

		public boolean isEnabled() {

			return !layer.equals(currentLayer);

		}

	}

	private class Layer {

		private IPortalPageLayer layer;

		private boolean initialized;

		private Control control;

		public Layer(IPortalPageLayer layer) {

			this.layer = layer;

		}

		public IPortalPageLayer getLayer() {

			return layer;

		}

		public void initialize() {

			layer.init();

			this.initialized = true;

		}

		public boolean isInitialized() {

			return initialized;

		}

		public void setControl(Control control) {

			this.control = control;

		}

		public Control getControl() {

			return control;

		}

	private String id;

	private String title;

	private ImageDescriptor imageDescriptor;

	private StackComposite pageComposite;

	private boolean initialized;

	private List<Layer> layers;

	private Layer currentLayer;

	private IAction[] actions;

	private List<TaskBar> navigationTaskBars;

	public PortalPage(String title, ImageDescriptor imageDescriptor, String id, List<IPortalPageLayer> layerExtensions) {

		this.title = title;

		this.imageDescriptor = imageDescriptor;

		this.id = id;

		layers = new ArrayList<Layer>(layerExtensions.size());

		for (IPortalPageLayer layerExtension : layerExtensions) {

			layers.add(new Layer(layerExtension));

		}

		navigationTaskBars = new ArrayList<TaskBar>(layerExtensions.size());

	public String getId() {

		return id;

	}

	public String getTitle() {

		return title;

	public ImageDescriptor getImageDescriptor() {

		return imageDescriptor;

	}

	public Control getPageControl() {

		return pageComposite;

	public void initialize() {

		setCurrentLayer(layers.get(0));

		initialized = true;

	public void createPageComposite(Composite parent, PortalEditor portalEditor) {

		Composite backgroundParent = portalEditor.getBackgroundParent();

		pageComposite = new StackComposite(parent, backgroundParent);

		for (Layer layer : layers) {

			Composite layerComposite = new SharedBackgroundComposite(pageComposite, backgroundParent);

			GridDataFactory.fillDefaults().grab(true, true).applyTo(layerComposite);

			GridLayoutFactory.fillDefaults().numColumns(2).spacing(20, 0).extendedMargins(20, 20, 20, 0).applyTo(layerComposite);

			createTaskBarControls(portalEditor, layerComposite, layer.getLayer());

			createMainControl(portalEditor, layerComposite, layer.getLayer());

			layer.setControl(layerComposite);

		}

	}

	protected void createTaskBarControls(PortalEditor portalEditor, Composite pageComposite, IPortalPageLayer layerExtension) {

		Composite backgroundParent = portalEditor.getBackgroundParent();

		Composite taskComposite = new SharedBackgroundComposite(pageComposite, backgroundParent);

		GridLayoutFactory.fillDefaults().applyTo(taskComposite);

		GridDataFactory.fillDefaults().grab(false, true).applyTo(taskComposite);

		TaskBar taskBar = new TaskBar(taskComposite, backgroundParent, this);

		GridDataFactory.fillDefaults().minSize(150, SWT.DEFAULT).grab(true, false).indent(0, 0).applyTo(taskBar);

		navigationTaskBars.add(taskBar);

		ActionUIUpdater updater = new ActionUIUpdater();

		IActionBar[] commandBars = layerExtension.createCommandBars(portalEditor, updater);

		for (IActionBar actionBar : commandBars) {

			taskBar = new TaskBar(taskComposite, backgroundParent, actionBar);

			updater.addTaskBar(taskBar);

			GridDataFactory.fillDefaults().minSize(150, SWT.DEFAULT).grab(true, false).indent(0, 0).applyTo(taskBar);

		}

	}

	protected void createMainControl(PortalEditor portalEditor, Composite pageComposite, IPortalPageLayer layerExtension) {

		Color background = pageComposite.getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND);

		Composite mainControl = 

			new RoundedCornerComposite(pageComposite, portalEditor.getBackgroundParent(), null, background);

		GridLayoutFactory.fillDefaults().margins(2, 2).applyTo(mainControl);

		GridDataFactory.fillDefaults().grab(true, true).applyTo(mainControl);

		Control control = layerExtension.createControl(mainControl, portalEditor);

		GridDataFactory.fillDefaults().grab(true, true).applyTo(control);

	}

	@Override

	public IAction[] getActions() {

		if (actions == null) {

			actions = new Action[layers.size()];

			int i = 0;

			for (Layer layer : layers) {

				actions[i++] = new ChangeLayerAction(layer);

			}

		}

		return actions;

	}

	@Override

	public String[] getHighlightedActionIds() {

		return null;

	}

	protected void setCurrentLayer(Layer layer) {

		currentLayer = layer;

		pageComposite.showControl(currentLayer.getControl());

		if (!currentLayer.isInitialized())

			currentLayer.initialize();

		for (TaskBar taskBar : navigationTaskBars) {

			taskBar.updateAllActionsUI();

		}

	}