package circusRefine.util;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;
import java.util.StringTokenizer;
import java.util.Vector;

import javax.swing.JOptionPane;


/*
 * Note - you must include the url type -- either "http://" or
 * "file://".
 */
public class CmdControl
{
    /**
     * Display a file in the system browser.  If you want to display a
     * file, you must include the absolute path name.
     *
     * @param url the file's url (the url must start with either "http://"
or
     * "file://").
     */

    private static final String fileSep = System.getProperty("file.separator");
    private static final String lineSep = System.getProperty("line.separator");
    private static final String os = System.getProperty("os.name");

    // Used to identify the windows platform.
    private static final String WIN_ID = "Windows";
    // The default system browser under windows.
    private static final String WIN_PATH = "rundll32";
    // The flag to display a url.
    private static final String WIN_FLAG = "url.dll,FileProtocolHandler";
    // The default browser under unix.
    private static final String UNIX_PATH = "netscape";
    // The flag to display a url.
    private static final String UNIX_FLAG = "-remote openURL";
    
	public static void displayURL(String url)
    {
        boolean windows = isWindowsPlatform();
        String cmd = null;
        try
        {
            if (windows)
            {
                // cmd = 'rundll32 url.dll,FileProtocolHandler http://...'
                cmd = WIN_PATH + " " + WIN_FLAG + " " + url;
                Process p = Runtime.getRuntime().exec(cmd);
            }
            else
            {
                // Under Unix, Netscape has to be running for the "-remote"
                // command to work.  So, we try sending the command and
                // check for an exit value.  If the exit command is 0,
                // it worked, otherwise we need to start the browser.
                // cmd = 'netscape -remote openURL(http://www.javaworld.com)'
                cmd = UNIX_PATH + " " + UNIX_FLAG + "(" + url + ")";
                Process p = Runtime.getRuntime().exec(cmd);
                try
                {
                    // wait for exit code -- if it's 0, command worked,
                    // otherwise we need to start the browser up.
                    int exitCode = p.waitFor();
                    if (exitCode != 0)
                    {
                        // Command failed, start up the browser
                        // cmd = 'netscape http://www.javaworld.com'
                        cmd = UNIX_PATH + " "  + url;
                        p = Runtime.getRuntime().exec(cmd);
                    }
                }
                catch(InterruptedException x)
                {
                    System.err.println("Error bringing up browser, cmd='" +
                                       cmd + "'");
                    System.err.println("Caught: " + x);
                }
            }
        }
        catch(IOException x)
        {
            // couldn't exec browser
            System.err.println("Could not invoke browser, command=" + cmd);
            System.err.println("Caught: " + x);
        }
    }
    /**
     * Try to determine whether this application is running under Windows
     * or some other platform by examing the "os.name" property.
     *
     * @return true if this application is running under a Windows OS
     */
    public static boolean isWindowsPlatform()
    {
        if ( os != null && os.startsWith(WIN_ID))
            return true;
        else
            return false;
    }

    public static String executeCmd(String cmd)
    throws IOException
    {
    	
        Process p = Runtime.getRuntime().exec(cmd);
        
        // Get the input stream and read from it
        
        InputStream in = p.getInputStream();
        
        int c;
        String output = "";
        
        while ((c = in.read()) != -1) {
            output = output + ((char)c);
        }
        in.close();            
        return output;
    }

    public static String[] returnLines(String str)
    {
    	
    	StringTokenizer st = new StringTokenizer(str,lineSep);
    	List<String> list = new Vector<String>();
        while (st.hasMoreTokens()) {
            list.add(st.nextToken());
        }
        String[] retorno = list.toArray(new String[0]);        
        return retorno;
    }
    

}