// Job.cpp     Dave Reed      2/5/05
///////////////////////////////////////////////////////////////////////////////

#include <sstream>
#include <string>
#include "Job.h"
using namespace std;

Job::Job(int id, int arrival, const string & bursts)
// Assumes: id is unique, arrival and len >= 0
// Results: constructs a job object, initializes executedSoFar to 0
{
    jobID = id;
    jobArrivalTime = arrival;
    
    istringstream istr(bursts);
    int b;
    while (istr >> b) {
        jobBursts.push(b);
    }
}

int Job::getID() const
// Returns: returns ID number of the job
{
    return jobID;
}

int Job::getArrival() const
// Returns: returns arrival time of the job
{
    return jobArrivalTime;
}

int Job::getRemainingBurst() const
// Returns: returns length of the job
{
    return jobBursts.front();
}

JobStatus Job::execute()
// Assumes: job is not done yet (executedSoFar < length)
// Returns: status (OK, IO or DONE) after executing the job for a cycle
{
    jobBursts.front()--;

    if (jobBursts.front() == 0) {
        jobBursts.pop();
        if (jobBursts.empty()) {
            return DONE;
        }
        else {
            return IO;
        }
    }
    else {
        return OK;
    }
}