/**
 *  Generic example of master/worker program.  
 *
 *  "Tasks" just consist of sleeping for a specified time; times to wait are
 *  generatedly randomly from 1 to a specified maximum.
 *
 *  Command-line arguments:  total tasks, maximum task time, seed,
 *    (optional) "--verbose" for verbose output
 *
 *  Sequential version.
 */
package csci3366.sample.masterworker.seq;

import java.util.List;
import csci3366.sample.masterworker.FakeTasks;

public class MasterWorkerSeq {

    /* variables/constants */

    /** 
     * Main method.
     */
    public static void main(String[] args) {

        String usageMessage = 
            "parameters:  numTasks maxTaskTime seed [--verbose]";

        int numTasks = 0;
        int maxTaskTime = 0;
        int seed = 0;
        boolean verbose = false;

        /* process command-line arguments */
        if (args.length < 3) {
            System.err.println(usageMessage); System.exit(1);
        }
        try {
            numTasks = Integer.parseInt(args[0]);
            maxTaskTime = Integer.parseInt(args[1]);
            seed = Integer.parseInt(args[2]);
        }
        catch (NumberFormatException e) {
            System.err.println(usageMessage); System.exit(1);
        }
        if (args.length > 3) {
            if (args[3].equals("--verbose"))
                verbose = true;
            else {
                System.err.println(usageMessage); System.exit(1);
            }
        }

        /* do processing */

        int totalTaskTime = 0;

        /* start timing */
        long startTime = System.currentTimeMillis();

        /* build list of tasks */
        List<FakeTasks.Task> taskList = 
            FakeTasks.randomTasks(numTasks, maxTaskTime, seed);

        /* process tasks */
        for (FakeTasks.Task t : taskList) {
            totalTaskTime += t.time;
            FakeTasks.TaskResult tr = t.execute();
            if (verbose) {
                System.out.printf("%s\n", FakeTasks.toString(t, tr));
            }
        }

        /* end timing and print result */
        long endTime = System.currentTimeMillis();
        System.out.printf("\nsequential version\n");
        System.out.printf("number of tasks = %d\n", numTasks);
        System.out.printf("max task time = %d\n", maxTaskTime);
        System.out.printf("total task time = %d\n", totalTaskTime);
        System.out.printf("running time = %g\n", 
                (double) (endTime - startTime) / 1000);
    }
}