/*
 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.guvnor.tools.wizards;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.List;
import org.guvnor.tools.Activator;
import org.guvnor.tools.GuvnorRepository;
import org.guvnor.tools.Messages;
import org.guvnor.tools.utils.PlatformUtils;

/**
 * Wizard page for selecting a Guvnor repository.
 */
public class SelectGuvnorRepPage extends WizardPage {

    private Button createRep;
    private Button existingRep;
    private List   repLocations;

    public SelectGuvnorRepPage(String pageName) {
        super(pageName);
    }

    public SelectGuvnorRepPage(String pageName, String title, ImageDescriptor titleImage) {
        super(pageName, title, titleImage);
    }

    public void createControl(Composite parent) {
        Composite composite = PlatformUtils.createComposite(parent, 1);
        createRep = new Button(composite, SWT.RADIO);
        createRep.setText(Messages.getString("select.rep.guvnor.loc")); //$NON-NLS-1$
        createRep.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        createRep.setSelection(false);
        createRep.addSelectionListener(new SelectionListener() {
            public void widgetDefaultSelected(SelectionEvent e) { }

            public void widgetSelected(SelectionEvent e) {
                repLocations.setEnabled(existingRep.getSelection());
                updateModel();
            }
        });

        existingRep = new Button(composite, SWT.RADIO);
        existingRep.setText(Messages.getString("select.rep.guvnor.loc.desc")); //$NON-NLS-1$
        existingRep.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        existingRep.setSelection(true);
        existingRep.addSelectionListener(new SelectionListener() {
            public void widgetDefaultSelected(SelectionEvent e) { }

            public void widgetSelected(SelectionEvent e) {
                repLocations.setEnabled(existingRep.getSelection());
                updateModel();
            }
        });

        repLocations = new List(composite, SWT.BORDER | SWT.MULTI);
        repLocations.setLayoutData(new GridData(GridData.FILL_BOTH));
        repLocations.addSelectionListener(new SelectionListener() {
            public void widgetDefaultSelected(SelectionEvent e) { }

            public void widgetSelected(SelectionEvent e) {
                updateModel();
            }
        });
        addRepositoryList();
        super.setControl(composite);
    }

    private void addRepositoryList() {
        java.util.List<GuvnorRepository> reps = Activator.getLocationManager().getRepositories();
        for (int i = 0; i < reps.size(); i++) {
            repLocations.add(reps.get(i).getLocation());
        }
        if (repLocations.getItemCount() > 0) {
            repLocations.setSelection(0);
            updateModel();
        }
    }

    private void updateModel() {
        GuvWizardModel model = ((IGuvnorWizard)super.getWizard()).getModel();
        if (createRep.getSelection()) {
            model.setCreateNewRep(true);
            model.setRepLocation(null);
        } else {
            model.setCreateNewRep(false);
            String selected = null;
            if (repLocations.getSelection().length > 0) {
                selected = repLocations.getSelection()[0];
            }
            if (selected != null) {
                model.setRepLocation(repLocations.getSelection()[0]);
            }
        }
    }
}