package org.eparapher.rcp.views;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.URL;

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.console.ConsolePlugin;
import org.eclipse.ui.console.IConsole;
import org.eclipse.ui.console.MessageConsole;
import org.eclipse.ui.console.MessageConsoleStream;
import org.eparapher.rcp.Application;
import org.eparapher.rcp.tools.GUIIcons;


public class DebugConsoleView extends MessageConsole {

	private static Logger log = Logger.getLogger(DebugConsoleView.class);

	private MessageConsoleStream outMessageStream;
	private MessageConsoleStream errMessageStream;

	/*
	 * Default Constructor
	 * Redirect JVM Standard output and error output
	 */
    public DebugConsoleView() {

        super(Application.PLUGIN_ID + " Debug Console", ImageDescriptor.createFromImage(GUIIcons.VIEW_CONSOLE_ICON) );

        initStreams();

        try {
        	//Redirect the std and err output
            System.setOut(getOutputStream());
            System.setErr(getErrorOutputStream());

            //Reload Log4J Configuration
    		URL log4JConfig= Platform.getBundle( Application.PLUGIN_ID ).getResource( "log4j.properties" );
			PropertyConfigurator.configure( log4JConfig );

		} catch (SecurityException e) {
			System.err.println("Cannot redirect stdout and stderr to eParapher Console");
		}
        
        ConsolePlugin.getDefault().getConsoleManager().addConsoles( new IConsole[] { this } );
    }

    
    public DebugConsoleView(String mName, InputStream min, InputStream merr) {
        super(mName, ImageDescriptor.createFromImage(GUIIcons.VIEW_CONSOLE_ICON) );
        initStreams();
        StreamGobbler err = new StreamGobbler(merr);
        StreamGobbler out = new StreamGobbler(min);
        err.start();
        out.start();
        ConsolePlugin.getDefault().getConsoleManager().addConsoles( new IConsole[] { this } );
    }

    private void initStreams() {
        outMessageStream = newMessageStream();
        Display d = Display.getCurrent();
        outMessageStream.setColor(d.getSystemColor(SWT.COLOR_BLUE));
        errMessageStream = newMessageStream();
        errMessageStream.setColor(d.getSystemColor(SWT.COLOR_RED));
    }

    public PrintStream getOutputStream() {
    	return new PrintStream(outMessageStream);
    }
    public PrintStream getErrorOutputStream() {
    	return new PrintStream(errMessageStream);
    }
    
 /**
  * A Thread to get Output from External Process
  */
 public static class StreamGobbler extends Thread {
   InputStream is;

   StreamGobbler(InputStream is) {
     this.is = is;
   }

   public void run() {
     try {
       InputStreamReader isr = new InputStreamReader(is);
       BufferedReader br = new BufferedReader(isr);
       String line = null; 	    
       while ((line = br.readLine()) != null)
      	 System.out.println(line);
       br.close();
     } catch (Throwable ioe) {
       ioe.printStackTrace();
     }
   }
 }

}