/** Main program for Programming assignment 3.
 **  Simulate cpu scheduling.
 **  This version does RR and calls skeletons for the other schedulers.
 **/

public class Proj3 {

    final static String usage =
       "usage: java Proj3 [-v...] [-t] [-cTYPE] data-file quantum\n"
        +   "   ctype is cRR, cX1, or cX2\n";
        
    public static void main(String argv[]) throws Exception {
    
        int arg, pos, cpuSched = Sim.CPU_RR;
        
        for (arg = 0; arg < argv.length; arg++) {
            if (argv[arg].charAt(0) != '-')
                break;
            for (pos = 1; pos < argv[arg].length(); pos++) {
	          switch (argv[arg].charAt(pos)) {
                case 'v':
	              for (int po = 1; po < argv[arg].length(); po++) {
	                  if (argv[arg].charAt(po) != 'v')
	          	          throw new RuntimeException(usage);
                      Sim.moreVerbose();
	              }
	              break;
	              
	            case 't':
	              Sim.traceFlag = true;    // <--
	              break;
	              
                case 'c':
                  if (argv[arg].substring(2).toUpperCase().equals("RR"))
                      cpuSched = Sim.CPU_RR;
                  else if (argv[arg].substring(2).toUpperCase().equals("X1"))
                      cpuSched = Sim.CPU_XQ1;
                  else if (argv[arg].substring(2).toUpperCase().equals("X2"))
                      cpuSched = Sim.CPU_XQ2;
                  else
                      throw new RuntimeException(
                          "Unknown cpu scheduler type: '"
                          + argv[arg].substring(2) + "'\n" + usage);
                  pos += 2;
                  break;
                  
                default:
                  throw new Exception(usage);
              }
            }
        }
        if (argv.length - arg != 2)
            throw new Exception(usage);
            
//System.out.println("==========> arg["+(arg+1)+"]="+argv[arg+1]);
        Sim.QUANTUM = Integer.parseInt(argv[arg+1]);       // <--
        
//System.out.println("==========> arg["+(arg)+"]="+argv[arg]);        
        Sim.mainLoop(argv[arg] , cpuSched);         // <--
    }

    static private void pl(String msg) {
        System.out.println( msg );
    }
} // Proj3