/*
 * Jalview - A Sequence Alignment Editor and Viewer ($$Version-Rel$$)
 * Copyright (C) $$Year-Rel$$ The Jalview Authors
 * 
 * This file is part of Jalview.
 * 
 * Jalview is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License 
 * as published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *  
 * Jalview 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Jalview.  If not, see <http://www.gnu.org/licenses/>.
 * The Jalview Authors are detailed in the 'AUTHORS' file.
 */
package jalview.bin;

import static org.junit.Assert.*;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class CommandLineOperations
{

  @BeforeClass
  public static void setUpBeforeClass() throws Exception
  {
  }

  @AfterClass
  public static void tearDownAfterClass() throws Exception
  {
  }

  /***
   * from
   * http://stackoverflow.com/questions/808276/how-to-add-a-timeout-value-when
   * -using-javas-runtime-exec
   * 
   * @author jimp
   * 
   */
  private static class Worker extends Thread
  {
    private final Process process;

    private Integer exit;

    private Worker(Process process)
    {
      this.process = process;
    }

    public void run()
    {
      try
      {
        exit = process.waitFor();
      } catch (InterruptedException ignore)
      {
        return;
      }
    }
  }

  private Worker jalviewDesktopRunner(boolean withAwt, String cmd,
          int timeout) throws InterruptedException, IOException
  {
    String _cmd = "java "
            + (withAwt ? "-Djava.awt.headless=true" : "")
            + " -Djava.ext.dirs=./lib -classpath ./classes jalview.bin.Jalview ";
    System.out.println("###############Jalview CMD: " + _cmd + cmd);
    Process ls2_proc = Runtime.getRuntime().exec(_cmd + cmd);
    BufferedReader outputReader = new BufferedReader(new InputStreamReader(
            ls2_proc.getInputStream()));

    BufferedReader errorReader = new BufferedReader(new InputStreamReader(
            ls2_proc.getErrorStream()));
    Worker worker = new Worker(ls2_proc);
    worker.start();
    worker.join(timeout);
    System.out.println("Output:  ");
    String ln = null;
    while ((ln = outputReader.readLine()) != null)
    {
      System.out.println(ln);
    }

    System.out.println("Error:  ");
    while ((ln = errorReader.readLine()) != null)
    {
      System.out.println(ln);
    }
    return worker;
  }

  @Test
  public void testHeadlessModeEPS() throws Exception
  {
    String[] headlessArgs = new String[]
    { "nodisplay", "headless", "nogui" };
    for (String _harg : headlessArgs)
    {
      boolean _switch = false, withAwt = false;
      do
      {
        if (_switch)
        {
          withAwt = true;
        }
        _switch = true;
        String jalview_input = "examples/uniref50.fa";
        String jalview_output = "test_uniref50_out.eps";
        String cmd = "" + _harg + " -open " + jalview_input + " -eps "
                + jalview_output;
        String harg = _harg
                + (withAwt ? "-Djava.awt.headless=true"
                        : " NO AWT.HEADLESS");
        System.out.println("Testing with Headless argument: '" + harg
                + "'\n");
        Worker worker = jalviewDesktopRunner(withAwt, cmd, 9000);
        assertTrue("Didn't create an output EPS file.[" + harg + "]",
                new File("test_uniref50_out.eps").exists());
        assertTrue("Didn't create an EPS file with any content[" + harg
                + "]", new File("test_uniref50_out.eps").length() > 4096);
        if (worker.exit == null)
        {
          worker.interrupt();
          Thread.currentThread().interrupt();
          worker.process.destroy();
          fail("Jalview did not exit after EPS generation (try running test again to verify - timeout at 9000ms). ["
                  + harg + "]");
        }
      } while (!withAwt);
    }
  }
  // @Test
  // public void testJalview2XMLDataset() throws Exception
  // {
  // String jalview_input = "examples/uniref50.fa";
  // String jalview_output = "test_uniref50_out.eps";
  // String cmd = ""+" -open "+ jalview_input + " -eps " + jalview_output;
  // //String harg = _harg+(withAwt ?
  // "-Djava.awt.headless=true":" NO AWT.HEADLESS");
  // System.out.println("Testing with Headless argument: '"+harg+"'\n");
  // Worker worker = jalviewDesktopRunner(withAwt, cmd, 9000);
  // assertTrue("Didn't create an output EPS file.["+harg+"]", new
  // File("test_uniref50_out.eps").exists());
  // assertTrue("Didn't create an EPS file with any content["+harg+"]", new
  // File("test_uniref50_out.eps").length()>4096);
  // if (worker.exit == null){
  // worker.interrupt();
  // Thread.currentThread().interrupt();
  // worker.process.destroy();
  // fail("Jalview did not exit after EPS generation (try running test again to verify - timeout at 9000ms). ["+harg+"]");
  // }
  // }
}