public BestElevatorInfo checkBestElevator(int scoreToCheck, Elevator newElevator, BestElevatorInfo bestElevatorInfo, int floor)
{
if (scoreToCheck < bestElevatorInfo.bestScore)
{
bestElevatorInfo.bestScore = scoreToCheck;
bestElevatorInfo.bestElevator = newElevator;
bestElevatorInfo.referenceGap = Math.Abs(newElevator.currentFloor - floor);
}
else if (bestElevatorInfo.bestScore == scoreToCheck)
{
int gap = Math.Abs(newElevator.currentFloor - floor);
if (bestElevatorInfo.referenceGap > gap)
{
bestElevatorInfo.bestScore = scoreToCheck;
bestElevatorInfo.bestElevator = newElevator;
bestElevatorInfo.referenceGap = gap;
}
}
return(bestElevatorInfo);
}
//We use a score system depending on the current elevators state. Since the bestScore and the referenceGap are
//higher values than what could be possibly calculated, the first elevator will always become the default bestElevator,
//before being compared with to other elevators. If two elevators get the same score, the nearest one is prioritized.
public Elevator findBestElevator(int floor, string direction)
{
int requestedFloor = floor;
string requestedDirection = direction;
var bestElevatorInfo = new BestElevatorInfo(null, 6, 1000000);
if (requestedFloor == 1)
{
foreach (Elevator elevator in this.elevatorsList)
{
if (1 == elevator.currentFloor && elevator.status == "stopped")
{
this.checkBestElevator(1, elevator, bestElevatorInfo, requestedFloor);
}
else if (1 == elevator.currentFloor && elevator.status == "idle")
{
this.checkBestElevator(2, elevator, bestElevatorInfo, requestedFloor);
}
else if (1 > elevator.currentFloor && elevator.direction == "up")
{
this.checkBestElevator(3, elevator, bestElevatorInfo, requestedFloor);
}
else if (1 < elevator.currentFloor && elevator.direction == "down")
{
this.checkBestElevator(3, elevator, bestElevatorInfo, requestedFloor);
}
else if (elevator.status == "idle")
{
this.checkBestElevator(4, elevator, bestElevatorInfo, requestedFloor);
}
else
{
this.checkBestElevator(5, elevator, bestElevatorInfo, requestedFloor);
}
}
}
else
{
foreach (Elevator elevator in this.elevatorsList)
{
if (requestedFloor == elevator.currentFloor && elevator.status == "stopped" && requestedDirection == elevator.direction)
{
this.checkBestElevator(1, elevator, bestElevatorInfo, requestedFloor);
}
else if (requestedFloor > elevator.currentFloor && elevator.direction == "up" && requestedDirection == "up")
{
this.checkBestElevator(2, elevator, bestElevatorInfo, requestedFloor);
}
else if (requestedFloor < elevator.currentFloor && elevator.direction == "down" && requestedDirection == "down")
{
this.checkBestElevator(2, elevator, bestElevatorInfo, requestedFloor);
}
else if (elevator.status == "idle")
{
this.checkBestElevator(3, elevator, bestElevatorInfo, requestedFloor);
}
else
{
this.checkBestElevator(4, elevator, bestElevatorInfo, requestedFloor);
}
}
}
return(bestElevatorInfo.bestElevator);
}