/*******************************************************************************
 * 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.gradle.core.modules;

import com.liferay.ide.core.util.CoreUtil;
import com.liferay.ide.core.util.FileUtil;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.sapphire.DefaultValueService;

/**
 * @author Terry Jia
 * @author Andy Wu
 */
public class HostOSGiBundleDefaultValueService extends DefaultValueService
{

    @Override
    protected String compute()
    {
        String projectName = op().getProjectName().content();

        if( !CoreUtil.empty( projectName ) )
        {
            IProject project = CoreUtil.getProject( projectName );
            IFile bndFile = project.getFile( "bnd.bnd" );

            if( bndFile.exists() )
            {
                String fragmentFlag = "Fragment-Host:";

                String[] lines = FileUtil.readLinesFromFile( bndFile.getLocation().toFile() );
                for( String line : lines )
                {
                    if( line.startsWith( fragmentFlag ) )
                    {
                        String[] s = line.split( ":" );

                        if( !s[1].contains( ";" ) )
                        {
                            return s[1];
                        }
                        else
                        {
                            String[] f = s[1].split( ";" );

                            String hostName = f[0];

                            String bundleVersion = f[1];
                            String b[] = bundleVersion.split( "=" );
                            String version = b[1].substring( 1, b[1].length() - 1 );
                            return hostName + "-" + version;
                        }
                    }
                }
            }
        }

        return null;
    }

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

}