public static string SimulationElevator(
List <Passenger> passengers,
int waitTime,
int capacity)
{
var timeClock = new TimeClock();
timeClock.Time = 0;
var studentsWaitLine = new WaitLine();
var teachersWaitLine = new WaitLine();
int roryTime = 0;
int lastTripFinishTime = 0;
var trip = new Trip();
int indexOfPassengers = 0;
int tripIndex = 1;
while (true)
{
//studentsWaitLine.queue.Clear();
//teachersWaitLine.queue.Clear();
// need to compare Math.Max between timeClock.Time and first passenger's time
int oneByTimeClock = timeClock.Time;
int endTime = 0;
for (int i = indexOfPassengers; i < passengers.Count; i++)
{
if (i == indexOfPassengers)
{
int timeByPassengerArrival = passengers[i].ArrivalTime;
endTime = oneByTimeClock;
// determine endTime
bool isWaitLineEmtpy = waitLineIsEmtpy(studentsWaitLine.queue, teachersWaitLine.queue);
if (isWaitLineEmtpy)
{
endTime = Math.Max(oneByTimeClock, passengers[i].ArrivalTime);
}
endTime += waitTime;
// update timeClock time
if (isWaitLineEmtpy && timeByPassengerArrival > oneByTimeClock)
{
timeClock.Time = timeByPassengerArrival;
}
}
if (passengers[i].ArrivalTime > endTime)
{
indexOfPassengers = i; // Load for next trip
break;
}
if (i == (passengers.Count - 1))
{
indexOfPassengers = passengers.Count; // help to terminate the loop
}
// add a member function for class WaitLine
int id = passengers[i].Id;
if (id == 1)
{
if (studentsWaitLine.queue == null)
{
studentsWaitLine.queue = new Queue <Passenger>();
}
studentsWaitLine.queue.Enqueue(passengers[i]);
}
else
{
if (teachersWaitLine.queue == null)
{
teachersWaitLine.queue = new Queue <Passenger>();
}
teachersWaitLine.queue.Enqueue(passengers[i]);
}
}
// cannot load any passengers, break loop
if (
WaitLine.IsEmtpy(studentsWaitLine) &&
WaitLine.IsEmtpy(teachersWaitLine))
{
break;
}
int count = 0;
while (count < capacity)
{
if (teachersWaitLine.queue.Count() > 0)
{
// add member function in class Trip
var passenger = teachersWaitLine.queue.Dequeue();
if (trip.teachers == null)
{
trip.teachers = new List <Passenger>();
trip.teachers.Add(passenger);
}
else
{
var tripPassengers = trip.teachers;
tripPassengers.Add(passenger);
trip.teachers = tripPassengers;
}
count++;
continue;
}
if (studentsWaitLine.queue.Count() > 0)
{
var passenger = studentsWaitLine.queue.Dequeue();
if (trip.students == null)
{
trip.students = new List <Passenger>();
trip.students.Add(passenger);
}
else
{
var tripPassengers = trip.students;
tripPassengers.Add(passenger);
trip.students = tripPassengers;
}
count++;
continue;
}
if (teachersWaitLine.queue.Count() == 0 &&
studentsWaitLine.queue.Count() == 0)
{
break;
}
}
timeClock.Time += waitTime;
// run the trip
trip.RunElevatorRoundTrip(
ref timeClock,
trip,
ref roryTime,
ref lastTripFinishTime,
tripIndex);
tripIndex++;
// clear trip passengers
trip.students.Clear();
trip.teachers.Clear();
}
return(roryTime.ToString() + " " + lastTripFinishTime.ToString());
}
public static bool IsEmtpy(WaitLine waitLine)
{
return(waitLine.queue == null || waitLine.queue.Count == 0);
}
