/**

 * Copyright (c) 2010 Symbian Foundation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Symbian Foundation - initial contribution.

 * Contributors:

 * Description:

 * Overview:

 * Details:

 * Platforms/Drives/Compatibility:

 * Assumptions/Requirement/Pre-requisites:

 * Failures and causes:

 */

package org.symbian.tools.wrttools.wizards;

import java.text.MessageFormat;

import java.util.Collection;

import java.util.LinkedList;

import org.eclipse.core.databinding.Binding;

import org.eclipse.core.databinding.DataBindingContext;

import org.eclipse.core.databinding.UpdateValueStrategy;

import org.eclipse.core.databinding.observable.value.IObservableValue;

import org.eclipse.core.databinding.validation.IValidator;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.jface.databinding.swt.ISWTObservableValue;

import org.eclipse.jface.databinding.swt.SWTObservables;

import org.eclipse.jface.databinding.wizard.WizardPageSupport;

import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Text;

import org.symbian.tools.tmw.ui.project.INewApplicationWizardPage;

import org.symbian.tools.tmw.ui.project.IProjectTemplate;

import org.symbian.tools.tmw.ui.project.IProjectTemplateContext;

import org.symbian.tools.wrttools.Activator;

import org.symbian.tools.wrttools.util.CompoundValidator;

public class NewFlickrApplicationWizardPage extends WizardPage implements INewApplicationWizardPage {

    private static class NonEmptyStringValidator implements IValidator {

        private final String propertyName;

        public NonEmptyStringValidator(String propertyName) {

            this.propertyName = propertyName;

        }

        public IStatus validate(Object value) {

            if (value == null || value.toString().trim().length() == 0) {

                return new Status(IStatus.ERROR, Activator.PLUGIN_ID, MessageFormat.format("Field {0} is empty",

                        propertyName));

            }

            return Status.OK_STATUS;

        }

    }

    private DataBindingContext bindingContext;

    private final Collection<Binding> bindings = new LinkedList<Binding>();

    private IProjectTemplateContext context;

    public NewFlickrApplicationWizardPage() {

        super("FlickrFiles");

        setTitle("Application Files");

        setDescription("Specify application file names");

    }

    protected void addTemplateControls(Composite root) {

        createLabel(root, "Flickr URL:");

        createText(root, "flickrUrl", "Flickr URL", bindingContext);

        createLabel(root, "");

        createLabel(root, "");

    }

    public void createControl(Composite parent) {

        Composite root = new Composite(parent, SWT.NONE);

        WizardPageSupport.create(this, bindingContext);

        root.setLayout(new GridLayout(2, false));

        createLabel(root, "Name of main HTML:");

        createText(root, IProjectTemplate.CommonKeys.main_html, "HTML file name", bindingContext);

        createLabel(root, "");

        createLabel(root, "");

        createLabel(root, "Name of CSS file:");

        createText(root, IProjectTemplate.CommonKeys.main_css, "CSS file name", bindingContext);

        createLabel(root, "");

        createLabel(root, "");

        createLabel(root, "Name of JavaScript file:");

        createText(root, IProjectTemplate.CommonKeys.main_js, "JavaScript file name", bindingContext);

        createLabel(root, "");

        Button homeScreen = new Button(root, SWT.CHECK);

        homeScreen.setText("Enable HomeScreen");

        createLabel(root, "");

        createLabel(root, "");

        IObservableValue view = SWTObservables.observeSelection(homeScreen);

        IObservableValue model = context.getParameterObservable(WizardContext.HOME_SCREEN);

        bindingContext.bindValue(view, model);

        addTemplateControls(root);

        setControl(root);

    }

    protected void createLabel(Composite root, String text) {

        Label label = new Label(root, SWT.NONE);

        label.setText(text);

    }

    protected Text createText(Composite root, String property, String propertyName, DataBindingContext bindingContext,

            IValidator... validators) {

        Text text = new Text(root, SWT.BORDER);

        text.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        ISWTObservableValue view = SWTObservables.observeText(text, SWT.Modify);

        UpdateValueStrategy strategy = new UpdateValueStrategy(UpdateValueStrategy.POLICY_UPDATE);

        NonEmptyStringValidator validator = new NonEmptyStringValidator(propertyName);

        strategy.setBeforeSetValidator(validators.length == 0 ? validator

                : new CompoundValidator(validator, validators));

        bindings.add(bindingContext.bindValue(view, context.getParameterObservable(property), strategy, null));

        return text;

    }

    public void init(IProjectTemplateContext context, DataBindingContext bindingContext) {

        this.context = context;

        this.bindingContext = bindingContext;

    }

    public void remove() {

        for (Binding binding : bindings) {

            bindingContext.removeBinding(binding);

        }

    }

}