/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.functional.util.ftp;

import org.mule.runtime.core.util.FileUtils;

import java.io.File;
import java.io.IOException;

import org.apache.ftpserver.ftplet.Ftplet;

public class FtpServer {

  public static final String FTP_SERVER_BASE_DIR = "target/ftpserver";

  private String ftpHost;
  private int ftpPort;
  private String ftpUser;
  private String ftpPassword;
  private Server server;
  private FtpClient ftpClient;

  private Ftplet ftplet = new MuleFtplet(new MuleFtplet.Callback() {

    @Override
    public void fileUploadCompleted() {}

    @Override
    public void fileMoveCompleted() {}
  });

  public FtpServer(String ftpHost, int ftpPort, String ftpUser, String ftpPassword) {
    this.ftpHost = ftpHost;
    this.ftpPort = ftpPort;
    this.ftpUser = ftpUser;
    this.ftpPassword = ftpPassword;
  }

  public void start() throws Exception {
    ftpClient = new FtpClient(this.ftpHost, this.ftpPort, this.ftpUser, this.ftpPassword);
    // make sure we start out with a clean ftp server base
    createFtpServerBaseDir();

    startServer();
    if (!ftpClient.testConnection()) {
      throw new IOException("could not connect to ftp server");
    }
  }

  public void stop() throws Exception {
    Thread.sleep(500);

    ftpClient.disconnect(); // we dont need the connection anymore for this test
    stopServer();

    deleteFtpServerBaseDir();
  }

  public FtpClient getFtpClient() {
    return ftpClient;
  }

  private void createFtpServerBaseDir() {
    deleteFtpServerBaseDir();
    File ftpBaseDir = new File(FTP_SERVER_BASE_DIR);
    ftpBaseDir.mkdirs();
  }

  private void deleteFtpServerBaseDir() {
    File ftpServerBase = new File(FTP_SERVER_BASE_DIR);
    FileUtils.deleteTree(ftpServerBase);
  }

  private void startServer() throws Exception {
    server = new Server(ftpPort, ftplet);
    // this is really ugly, but the above doesn't get to waiting.
    // need to improve this as part of ftp server work
    synchronized (this) {
      wait(500);
    }
  }

  private void stopServer() throws Exception {
    // stop the server
    if (null != server) {
      server.stop();
    }
  }
}