// Find best elevator in the chosen column
public Elevator ElevatorInTheChosenColumn(Column columnFinded, int requestedFloor, String direction, int userCurrentFloor)
{
var bestNearestElevatorGap = 10000000;
Elevator bestElevator = null;
var bestCase = 0;
foreach (Elevator elevator in columnFinded.listElevInColumn)
{
// Condition 1
if (userCurrentFloor == elevator.position)
{
// BestCase 1
if (bestCase == 0 || bestCase > 1)
{
bestCase = 1;
bestElevator = elevator;
// if user is at floor 1
}
else if (bestCase == 1 && requestedFloor > 1)
{
var gap = Math.Abs(elevator.position - 1);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
} // if user is not at floor 1
else if (bestCase == 1 && requestedFloor != 1)
{
var gap = Math.Abs(elevator.position - requestedFloor);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
}
}
// condition 2
else if (elevator.position > userCurrentFloor && requestedFloor == 1)
{
// BestCase 2
if (bestCase == 0 || bestCase > 2)
{
bestCase = 2;
bestElevator = elevator;
}// if user is at floor 1
else if (bestCase == 2 && requestedFloor > 2)
{
var gap = Math.Abs(elevator.position - 1);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
// if user is not at floor 1
}
else if (bestCase == 2 && requestedFloor != 1)
{
var gap = Math.Abs(elevator.position - requestedFloor);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
}
}
else if (elevator.position > 1 && direction == "down" && elevator.direction == "down")
{
// BestCase 3
if (bestCase == 0 || bestCase > 3)
{
bestCase = 3;
bestElevator = elevator;
}// if user is at floor 1
else if (bestCase == 3 && requestedFloor > 1)
{
var gap = Math.Abs(elevator.position - 1);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
// if user is not at floor 1
}
else if (bestCase == 3 && requestedFloor != 1)
{
var gap = Math.Abs(elevator.position - requestedFloor);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
}
}
// Condition 3
else if (elevator.position > 1 && direction == "up" && elevator.direction == "down")
{
// BestCase 3
if (bestCase == 0 || bestCase > 4)
{
bestCase = 4;
bestElevator = elevator;
}// if user is at floor 1
else if (bestCase == 4 && requestedFloor > 1)
{
var gap = Math.Abs(elevator.position - 1);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
// if user is not at floor 1
}
else if (bestCase == 4 && requestedFloor != 1)
{
var gap = Math.Abs(elevator.position - requestedFloor);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
}
}
// Condition 4
else if (elevator.direction == "idle")
{
// BestCase 4
if (bestCase == 0 || bestCase > 4)
{
bestCase = 4;
bestElevator = elevator;
}
// if user is at floor 1
else if (bestCase == 4 && requestedFloor > 1)
{
var gap = Math.Abs(elevator.position - 1);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
} // if user is not at floor 1
else if (bestCase == 4 && requestedFloor != 1)
{
var gap = Math.Abs(elevator.position - requestedFloor);
if (bestNearestElevatorGap >= gap)
{
bestElevator = elevator;
bestNearestElevatorGap = gap;
}
}
}
}
bestElevator.moveToUserCurrentFloor(userCurrentFloor);
bestElevator.moveToRequestedFloor(requestedFloor);
return(bestElevator);
}
