/*
 * Copyright (c) 2004-2011 Marco Maccaferri and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Marco Maccaferri - initial API and implementation
 */

package org.eclipsetrader.ui.internal.trading;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipsetrader.core.instruments.ISecurity;
import org.eclipsetrader.core.internal.trading.TargetPrice;
import org.eclipsetrader.core.trading.IAlert;
import org.eclipsetrader.core.trading.IAlertService;
import org.eclipsetrader.ui.internal.UIActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

public class TargetPriceWizard extends Wizard implements INewWizard {

    private TargetPriceWizardPage page;

    private ISecurity security;

    public TargetPriceWizard() {
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.IWorkbenchWizard#init(org.eclipse.ui.IWorkbench, org.eclipse.jface.viewers.IStructuredSelection)
     */
    @Override
    public void init(IWorkbench workbench, IStructuredSelection selection) {
        if (selection.isEmpty()) {
            throw new IllegalStateException("Nothing selected"); //$NON-NLS-1$
        }

        Object o = selection.getFirstElement();
        if (o instanceof IAdaptable) {
            o = ((IAdaptable) o).getAdapter(ISecurity.class);
        }

        if (o == null || !(o instanceof ISecurity)) {
            throw new IllegalStateException("Not a security"); //$NON-NLS-1$
        }

        security = (ISecurity) o;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.wizard.Wizard#getWindowTitle()
     */
    @Override
    public String getWindowTitle() {
        return Messages.TargetPriceWizard_WindowTitle;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.wizard.Wizard#getDefaultPageImage()
     */
    @Override
    public Image getDefaultPageImage() {
        return UIActivator.getDefault().getImageRegistry().get(UIActivator.ALERT_WIZARD_IMAGE);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.wizard.Wizard#addPages()
     */
    @Override
    public void addPages() {
        addPage(page = new TargetPriceWizardPage());
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.wizard.Wizard#performFinish()
     */
    @Override
    public boolean performFinish() {
        IAlertService service = getAlertService();

        List<IAlert> list = new ArrayList<IAlert>(Arrays.asList(service.getAlerts(security)));

        TargetPrice alert = new TargetPrice();
        alert.setParameters(page.getParametersMap());
        list.add(alert);

        service.setAlerts(security, list.toArray(new IAlert[list.size()]));

        return true;
    }

    IAlertService getAlertService() {
        IAlertService service = null;

        BundleContext context = UIActivator.getDefault().getBundle().getBundleContext();
        ServiceReference serviceReference = context.getServiceReference(IAlertService.class.getName());
        if (serviceReference != null) {
            service = (IAlertService) context.getService(serviceReference);
            context.ungetService(serviceReference);
        }

        return service;
    }
}