package jalview.bin;

import static org.junit.Assert.*;

import java.io.BufferedReader;
import java.io.File;
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;
    }
  }
}
  @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 = "java "+(withAwt ? "-Djava.awt.headless=true":"")+" -Djava.ext.dirs=./lib -classpath ./classes jalview.bin.Jalview -"+_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###############Jalview CMD: " + cmd);
    Process ls2_proc = Runtime.getRuntime().exec(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(9000);
    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);
    }
    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();
      ls2_proc.destroy();
      fail("Jalview did not exit after EPS generation (try running test again to verify - timeout at 9000ms). ["+harg+"]");
    }
    } while (!withAwt);
    } 
  }

}