/*******************************************************************************
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 *******************************************************************************/
package com.liferay.ide.project.core.modules;

import org.eclipse.sapphire.DefaultValueService;
import org.eclipse.sapphire.FilteredListener;
import org.eclipse.sapphire.PropertyContentEvent;


/**
 * @author Simon Jiang
 */
public class ComponentNameDefaultValueService extends DefaultValueService
{
    private FilteredListener<PropertyContentEvent> listener;

    @Override
    protected void initDefaultValueService()
    {
        super.initDefaultValueService();

        this.listener = new FilteredListener<PropertyContentEvent>()
        {
            @Override
            protected void handleTypedEvent( PropertyContentEvent event )
            {
                refresh();
            }
        };

        op().property( NewLiferayModuleProjectOp.PROP_PROJECT_NAME ).attach( this.listener );
        op().property( NewLiferayModuleProjectOp.PROP_PROJECT_TEMPLATE_NAME ).attach( this.listener );
    }

    @Override
    protected String compute()
    {
        String retVal = "";

        final String projectName = op().getProjectName().content( true );

        if( projectName != null )
        {
            final String projectTemplate = op().getProjectTemplateName().content();

            String className = getClassName(projectName);

            if (projectTemplate.equals("activator") && !className.endsWith("Activator")) {
                className += "Activator";
            }
            else if ((projectTemplate.equals("mvc-portlet") ||
                      projectTemplate.equals("portlet")) &&
                     (className.length() > 7) && className.endsWith("Portlet")) {

                className = className.substring(0, className.length() - 7);
            }

            retVal = className;
        }

        return retVal;
    }

    private NewLiferayModuleProjectOp op()
    {
        return context( NewLiferayModuleProjectOp.class );
    }

    private String getClassName(String name) {
        name = getCapitalizedName(name);

        return removeChar(name, ' ');
    }

    private String getCapitalizedName(String name) {
        name = name.replace('-', ' ');
        name = name.replace('.', ' ');

        return capitalize(name, ' ');
    }

    static String removeChar(String s, char c) {
        int y = s.indexOf(c);

        if (y == -1) {
            return s;
        }

        StringBuilder sb = new StringBuilder(s.length());

        int x = 0;

        while (x <= y) {
            sb.append(s.substring(x, y));

            x = y + 1;

            y = s.indexOf(c, x);
        }

        sb.append(s.substring(x));

        return sb.toString();
    }

    private static String capitalize(String s, char separator) {
        StringBuilder sb = new StringBuilder(s.length());

        sb.append(s);

        for (int i = 0; i < sb.length(); i++) {
            char c = sb.charAt(i);

            if ((i == 0) || (sb.charAt(i - 1) == separator)) {
                c = Character.toUpperCase(c);
            }

            sb.setCharAt(i, c);
        }

        return sb.toString();
    }
    @Override
    public void dispose()
    {
        if ( op() != null)
        {
            op().property( NewLiferayModuleProjectOp.PROP_PROJECT_TEMPLATE_NAME ).detach( this.listener );
            op().property( NewLiferayModuleProjectOp.PROP_PROJECT_NAME ).detach( this.listener );
        }

        super.dispose();
    }
}