/**
 *
 * Grapher is used to generate data files for graphing from a process file.
 *
 */
 
 import java.io.*;
 import java.util.*;
 
 class Grapher {
     
     protected static Process[] _processes;
     protected static Scheduler _scheduler;

     public static void main ( String[] args) throws IOException{

	 if ( args.length != 2 ) {

	     System.out.println( "Arguments should take the form: " + 
				 "<filename> <available memory>" );
	     System.exit(1);

	 }
	 
	 File file = new File( args[0] );    
	 Integer runTime = -1;  
	 
	 if ( !file.exists() ) {
	     
	     System.out.println( "Invalid filename." );
	     System.exit(1);
	     
	 }
     
	 _processes = initProcesses( file );

	 System.out.print("Running Start-End Scheduler... ");

	 _scheduler = new StartEndScheduler( _processes, 
					     new Integer(args[1]) );
	 _scheduler.makeFiles( args[0] );

	 System.out.println("done.");
	 
	 _scheduler.reset();

	 System.out.print("Running Simple Linear Scheduler... ");
	 
	 _scheduler = new SimpleLinearScheduler( _processes,
						 new Integer(args[1]) );
	 _scheduler.makeFiles( args[0] );

	 System.out.println("done.");

	 _scheduler.reset();

	 System.out.print("Running In Order Scheduler... ");
	 
	 _scheduler = new InOrderScheduler( _processes,
					    new Integer(args[1]) );
	 _scheduler.makeFiles( args[0] );

	 System.out.println("done.");

	 _scheduler.reset();

	 System.out.print("Running Two Heap Scheduler... ");
	 
	 _scheduler = new TwoHeapScheduler( _processes,
					    new Integer(args[1]) );

	 _scheduler.makeFiles( args[0] );

	 System.out.println("done.");

     } // end main
     
     // Reads information from the file and initializes the processes
     // accordingly
     protected static Process[] initProcesses( File file )
         throws IOException {

         BufferedReader inFile = new BufferedReader( new FileReader( file ) );
	 String line = inFile.readLine();
	 
	 if (line == null)
	     throw new EOFException();
	 
	 Process[] processes = new Process[new Integer(line)];
	 int pCount = 0, totalShares = 0;
	 	 
	 String[] tokens;
	 
	 // Read through the file and initialize each Process
	 
	 line = inFile.readLine();
	 while (line != null) {
	 
             tokens = line.split("\\s");
	    
	     if (tokens.length != 4 || pCount >= processes.length)
	         throw new FileFormatException(
		     "The file's format is incorrect." );
	     
	     processes[pCount] = new Process(
	         new Integer(tokens[0]),
		 new Integer(tokens[1]),
		 new Integer(tokens[2]),
		 new Integer(tokens[3]) );
	     
	     totalShares += processes[pCount].getShare();

	     pCount++;	 
	     
	     line = inFile.readLine();
	     	 
	 }

	 // Run through each Process and calculate its shareFrom1

	 for ( int loop = 0; loop < pCount; loop++ ) {

	     double shareFrom1 = (double)processes[loop].getShare() / 
		 totalShares;

	     processes[loop].setShareFrom1( shareFrom1 );

	 }
	 
	 return processes;
     
     }
 
 }