/**************************************************************************
 * AbstractMain
 *
 * $Revision: 1.67 $
 * $Date: 2004/10/25 15:27:35 $
 *
 * Copyright (C) 2001 CERN - European Organization for Nuclear Research
 * All rights reserved.
 **************************************************************************/

package com.c2kernel.process;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;

import com.c2kernel.utils.FileStringUtility;
import com.c2kernel.utils.Logger;

/**************************************************************************
 *
 * @author $Author: abranson $ $Date: 2004/10/25 15:27:35 $
 * @version $Revision: 1.67 $
 **************************************************************************/
abstract public class AbstractMain
{
    public static boolean runningAsWrapper = false;

   /**************************************************************************
    *
    **************************************************************************/
    static protected void usage()
    {
        System.out.println();
        System.out.println("USAGE: com.c2kernel.process.AbstractMain \n" +
                           "    -config <server/client config file> \n" +
                           "    [-connect <LC connect file> ] (or LocalCentre in conf)\n" +
                           "    [-resURL c2kernel/resources] (or KernelResourceURL in conf)\n" +
                           "    [-domResURL domain/resources] (or DomainResourceURL in conf)\n" +
                           "    [-h] [-help] \n" +
                           "    [-logLevel 0-19] \n" +
                           "    [-logFile <path to log file>]");
        Logger.die("Initialisation error");
    }

   /**************************************************************************
    * reading and setting the standard c2k input paramaters
    **************************************************************************/
    static public java.util.Properties readC2KArgs( String[] args )
    {
        int                  i = 0;
        String configPath = null;
        String connectPath = null;
        java.util.Properties c2kProps = null;
        int logLevel = 0;
        PrintStream logStream = System.out;
        String centreId = null;

        try
        {
            if( args != null )
            {
                while( i < args.length )
                {
                    if( args[i].equals("-h") || args[i].equals("-help") )
                    {
                        usage();
                    }
                    else if(args[i].equals("-config"))
                    {
                        if( (i+1) >= args.length )
                        {
                            System.out.println("AbstractMain::readC2KArgs() - argument expected " +
                                         "for -config");
                            usage();
                        }
                        System.out.println("Config file: "+args[i+1]);
                        configPath = args[++i];

                    }
                    else if(args[i].equals("-connect"))
                    {
                        if( (i+1) < args.length ) // batch file will have no arg if no cmd line arg
                        {
                            connectPath = args[++i];
                        }
                    }
                    else if(args[i].equals("-logLevel"))
                    {
                        if( (i+1) >= args.length )
                        {
                            System.out.println("AbstractMain::readC2KArgs() - argument expected " +
                                         "for -logLevel");
                            usage();
                        }
                        logLevel = Integer.parseInt(args[++i]);
                    }
                    else if(args[i].equals("-logFile"))
                    {
                        if( (i+1) >= args.length )
                        {
                            System.out.println("AbstractMain::readC2KArgs() - argument expected " +
                                         "for -logFile");
                            usage();
                        }
                        logStream = new PrintStream(new FileOutputStream(args[++i], true));
                    }
                    i++;
                }

                // Set up log stream
                Logger.addLogStream(logStream, logLevel);

                if (configPath == null) {
                    System.out.println("No config file specified");
                    usage();
                }

                // Load config & connect files into c2kprops
                c2kProps = FileStringUtility.loadConfigFile( configPath );

                if (connectPath == null) {
                    // see if LC is listed in the config
                    Logger.msg(6, "No connect file specified in arguments. Looking in config.");
                    centreId = c2kProps.getProperty("LocalCentre");
                    if (centreId!= null) connectPath = "connect/"+centreId+".clc";
                }

                if (connectPath != null) {
                    Logger.msg(6, "Connect file: "+connectPath);
                    if (centreId == null) {
                        String connectFileName = new File(connectPath).getName();
                        centreId = connectFileName.substring(0, connectFileName.lastIndexOf(".clc"));
                        c2kProps.setProperty("LocalCentre", centreId);
                    }
                    FileStringUtility.appendConfigFile( c2kProps, connectPath);
                }
                else {
                    System.out.println("No connect file specified in args nor config file. Cannot continue.");
                    usage();
                }
            }
            else
            {
                System.out.println("AbstractMain::readC2KArgs() - no arguments!");
                usage();
            }
        }
        catch( Exception ex )
        {
            System.out.println("Main::readC2KArgs() - bad arguments! ");
            ex.printStackTrace();
            usage();
        }

        Logger.msg(7, "AbstractMain::standardSetUp() - readC2KArgs() DONE.");

        return c2kProps;
    }

}