/*******************************************************************************
 * 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.util;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

import org.codehaus.jackson.map.ObjectMapper;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.Platform;

import com.liferay.ide.project.core.ITargetPlatformConstant;
import com.liferay.ide.project.core.ProjectCore;
import com.liferay.ide.project.core.modules.ServiceContainer;

/**
 * @author Lovett Li
 */
public class TargetPlatformUtil
{

    public static ServiceContainer getServicesList() throws Exception
    {
        File tpIndexFile = checkCurrentTargetPlatform( "service" );

        return getServicesNameList( tpIndexFile );
    }

    public static ServiceContainer getServiceBundle( String serviceName ) throws Exception
    {
        File tpIndexFile = checkCurrentTargetPlatform( "service" );

        return getBundleAndVersion( tpIndexFile , serviceName);
    }

    public static ServiceContainer getServiceWrapperList() throws Exception
    {
        File tpIndexFile = checkCurrentTargetPlatform( "servicewrapper" );

        return getServicesNameList( tpIndexFile );
    }

    public static ServiceContainer getServiceWrapperBundle( String servicewrapperName ) throws Exception
    {
        File tpIndexFile = checkCurrentTargetPlatform( "servicewrapper" );

        return getBundleAndVersion( tpIndexFile, servicewrapperName );
    }

    private static File checkCurrentTargetPlatform( String type ) throws IOException
    {
        String currentVersion = Platform.getPreferencesService().getString(
            ProjectCore.PLUGIN_ID, ITargetPlatformConstant.CURRENT_TARGETFORM_VERSION,
            ITargetPlatformConstant.DEFAULT_TARGETFORM_VERSION, null );

        currentVersion = currentVersion.replace( "[", "" ).replace( "]", "" ).toLowerCase();

        return useSpecificTargetPlatform( currentVersion, type );
    }

    private static File useSpecificTargetPlatform( String currentVersion, String type ) throws IOException
    {
        URL url;
        url = FileLocator.toFileURL(
            ProjectCore.getDefault().getBundle().getEntry( "OSGI-INF/target-platform/liferay-" + currentVersion ) );
        final File tpFolder = new File( url.getFile() );

        File[] listFiles = tpFolder.listFiles( new FilenameFilter()
        {

            @Override
            public boolean accept( File dir, String name )
            {
                if( type.equals( "service" ) && name.endsWith( "services.json" ) )
                {
                    return true;
                }
                if( type.equals( "servicewrapper" ) && name.endsWith( "servicewrappers.json" ) )
                {
                    return true;
                }
                return false;
            }
        } );

        return listFiles[0];

    }

    public static List<String> getAllTargetPlatfromVersions() throws IOException
    {
        final URL url =
            FileLocator.toFileURL( ProjectCore.getDefault().getBundle().getEntry( "OSGI-INF/target-platform" ) );
        final File targetPlatfolder = new File( url.getFile() );
        final List<String> tpVersionList = new ArrayList<>();

        if( targetPlatfolder.isDirectory() )
        {
            File[] tpVersionFolder = targetPlatfolder.listFiles();

            if( tpVersionFolder != null )
            {
                for( File tp : tpVersionFolder )
                {
                    String tpVersion = tp.getName().split( "-" ,2)[1].toUpperCase();
                    tpVersionList.add( tpVersion );
                }
            }
        }

        return tpVersionList;
    }

    @SuppressWarnings( "unchecked" )
    private static ServiceContainer getServicesNameList( File tpFile ) throws Exception
    {
        final ObjectMapper mapper = new ObjectMapper();

        Map<String, String[]> map = mapper.readValue( tpFile, Map.class );
        String[] services = map.keySet().toArray( new String[0] );

        return new ServiceContainer( Arrays.asList( services ) );
    }

    @SuppressWarnings( "unchecked" )
    private static ServiceContainer getBundleAndVersion( File tpFile, String _serviceName ) throws Exception
    {
        final ObjectMapper mapper = new ObjectMapper();

        Map<String, List<String>> map = mapper.readValue( tpFile, Map.class );
        List<String> serviceBundle = map.get( _serviceName );

        if( serviceBundle != null && serviceBundle.size() != 0 )
        {
            return new ServiceContainer( serviceBundle.get( 0 ), serviceBundle.get( 1 ) ,serviceBundle.get( 2 ));
        }

        return null;
    }

    @SuppressWarnings( "unchecked" )
    public static ServiceContainer getThirdPartyBundleList( String _serviceName ) throws Exception
    {
        final URL url = FileLocator.toFileURL(
            ProjectCore.getDefault().getBundle().getEntry(
                "OSGI-INF/liferay-thirdparty-bundles.json" ) );
        final File tpFile = new File( url.getFile() );
        final ObjectMapper mapper = new ObjectMapper();

        Map<String, List<String>> map = mapper.readValue( tpFile, Map.class );
        List<String> serviceBundle = map.get( _serviceName );

        if( serviceBundle != null && serviceBundle.size() != 0 )
        {
            return new ServiceContainer( serviceBundle.get( 0 ), serviceBundle.get( 1 ), serviceBundle.get( 2 ) );
        }

        return null;
    }

}