package org.openslx.satellitedaemon.ftp;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.util.List;

import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.TrustManagerFactory;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPSClient;
import org.apache.log4j.Logger;
import org.openslx.imagemaster.thrift.iface.FtpCredentials;
import org.openslx.satellitedaemon.Globals;
import org.openslx.satellitedaemon.Globals.PropInt;
import org.openslx.satellitedaemon.Globals.PropString;
import org.openslx.satellitedaemon.db.DbImage;

public class FtpDownloadWorker implements Runnable
{
	private static Logger log = Logger.getLogger( FtpUploadWorker.class );

	@Override
	public void run()
	{
		while ( true ) {
			List<DbImage> imageList = DbImage.getAllMarkedForDownload();
			log.info( "FtpDownloadWorker: imageList Contains " + imageList.size() + " items." );
			for ( DbImage image : imageList ) {

				FtpCredentials ftpc = ThriftConnection.getFtpCredentials( image.guid );
				if ( ftpc == null ) {
					log.error( "The FtpCredentials are null" );
				}

				try {
					TrustManagerFactory trustManagerFactory = TrustManagerFactory
							.getInstance( KeyManagerFactory.getDefaultAlgorithm() );
					KeyStore keystore = KeyStore.getInstance( Globals.getPropertyString( PropString.KEYSTORETYPE ) );
					keystore.load( new FileInputStream( new File(
							Globals.getPropertyString( PropString.FTPSKEYSTOREPATH ) ) ),
							Globals.getPropertyString( PropString.FTPSKEYSTOREPWD ).toCharArray() );
					trustManagerFactory.init( keystore );
					TrustManager trustManager = trustManagerFactory.getTrustManagers()[0];
					FTPSClient ftpClient = new FTPSClient( "SSL", true );
					ftpClient.setTrustManager( trustManager );
					try {
						ftpClient.connect( Globals.getPropertyString( PropString.FTPSERVERIP ), Globals.getPropertyInt( PropInt.FTPPORT ) );
						if ( !ftpClient.login( ftpc.username, ftpc.password ) ) {
							log.error( "FTP problem. Coundn't log in!" );
						}
						File file = new File( "/tmp/" + image.guid + ".vmdk");
						ftpClient.setFileType( FTP.BINARY_FILE_TYPE );
						log.info( "FtpDownloadWorker: ftpc.filename: " + ftpc.filename );
						InputStream is = ftpClient.retrieveFileStream( ftpc.filename );
						FileOutputStream fos = new FileOutputStream( file );
						int b;
						while ((b = is.read()) != -1) {
							fos.write( b );
						}
						is.close();
						fos.close();
						ThriftConnection.finishedDownload( ftpc.username);

					} catch (IOException e) {
						log.error("FtpDownloadWorker: Error creating the FileInputStream");
					}
					finally {
						ftpClient.disconnect();
						log.info( "FtpDownloadWorker: ftpClient disconnected" );
					}
				} catch ( NoSuchAlgorithmException | KeyStoreException | CertificateException | IOException e ) {
					log.debug( "FtpDownloadWorker: Problem with Keystore ore FtpsClient creation." );
				}
			}
			try {
				Thread.sleep( 5 * 60 * 1000 );
			} catch ( InterruptedException e ) {
				log.error( "FtpUploadWorker: Sleep interrupted" );
				e.printStackTrace();
			}
		}

	}
}