package org.symbian.tools.tmw.internal.ui.wizard;

import java.util.Set;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.events.DisposeEvent;

import org.eclipse.swt.events.DisposeListener;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.help.IWorkbenchHelpSystem;

import org.eclipse.wst.common.project.facet.core.IFacetedProjectWorkingCopy;

import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;

import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectEvent;

import org.eclipse.wst.common.project.facet.core.events.IFacetedProjectListener;

import org.eclipse.wst.common.project.facet.core.runtime.RuntimeManager;

import org.eclipse.wst.common.project.facet.core.runtime.events.IRuntimeLifecycleEvent;

import org.eclipse.wst.common.project.facet.core.runtime.events.IRuntimeLifecycleListener;

import org.eclipse.wst.common.project.facet.ui.FacetUiHelpContextIds;

import org.eclipse.wst.common.project.facet.ui.internal.FacetedProjectFrameworkImages;

/**

 * @author <a href="mailto:konstantin.komissarchik@oracle.com">Konstantin Komissarchik</a>

 */

@SuppressWarnings("restriction")

public final class NewApplicationFacetsWizardPage extends WizardPage {

    public FacetsSelectionPanel panel;

    private final IFacetedProjectWorkingCopy fpjwc;

    public NewApplicationFacetsWizardPage(final Set<IProjectFacetVersion> base, final IFacetedProjectWorkingCopy fpjwc) {

        super("facets.selection.page"); //$NON-NLS-1$

        setTitle("Project Facets");

        setDescription("Select the facets that should be enabled for this project.");

        setImageDescriptor(FacetedProjectFrameworkImages.BANNER_IMAGE.getImageDescriptor());

        this.fpjwc = fpjwc;

    }

    public void createControl(final Composite parent) {

        this.panel = new FacetsSelectionPanel(parent, this.fpjwc);

        updatePageState();

        this.fpjwc.addListener(new IFacetedProjectListener() {

            public void handleEvent(final IFacetedProjectEvent event) {

                updatePageState();

            }

        }, IFacetedProjectEvent.Type.PROJECT_MODIFIED);

        final IRuntimeLifecycleListener runtimeLifecycleListener = new IRuntimeLifecycleListener() {

            public void handleEvent(final IRuntimeLifecycleEvent event) {

                updatePageState();

            }

        };

        RuntimeManager.addListener(runtimeLifecycleListener, IRuntimeLifecycleEvent.Type.VALIDATION_STATUS_CHANGED);

        this.panel.addDisposeListener(new DisposeListener() {

            public void widgetDisposed(final DisposeEvent e) {

                RuntimeManager.removeListener(runtimeLifecycleListener);

            }

        });

        final IWorkbenchHelpSystem h = PlatformUI.getWorkbench().getHelpSystem();

        h.setHelp(this.panel, FacetUiHelpContextIds.FACETS_SELECTION_PAGE);

        setControl(this.panel);

    }

    private void updatePageState() {

        if (!Thread.currentThread().equals(this.panel.getDisplay().getThread())) {

            final Runnable uiRunnable = new Runnable() {

                public void run() {

                    updatePageState();

                }

            };

            this.panel.getDisplay().asyncExec(uiRunnable);

            return;

        }

        setPageComplete(this.panel.isSelectionValid());

        if (getContainer().getCurrentPage() != null) {

            getContainer().updateButtons();

        }

    }

    public void setVisible(final boolean visible) {

        super.setVisible(visible);

        if (visible) {

            this.panel.setFocus();

        }

    }

}