{
    init: function(elevators, floors) {
        var callUp = [];
        var callDown = [];
        var elevatorList = [];
        var floorList = [];
        var optimiseMoves = false;

        var Floor = function (floor) {
            var self = this;
            self.floor = floor;
            self.wakeIdleElevator = function() {
                for (var i = 0; i < elevatorList.length; ++i) {
                    if (elevatorList[i].elevator.destinationQueue.length == 0) {
                        elevatorList[i].doSomething();
                    }
                }
            }
            self.floor.on("up_button_pressed", function() {
                callUp[self.floor.floorNum()] = true;
                self.wakeIdleElevator();
            });
            self.floor.on("down_button_pressed", function() {
                callDown[self.floor.floorNum()] = true;
                self.wakeIdleElevator();
            });
        }

        var Elevator = function(elevator) {
            var self = this;
            self.elevator = elevator;

            self.doSomething = function() {
                if (!optimiseMoves || self.elevator.loadFactor() > 0.7) {
                    for (var i = 1; i < floors.length; ++i) {
                        var above = self.elevator.currentFloor() + i;
                        if (above < floors.length && (callDown[above] || callUp[above])) {
                            self.elevator.goToFloor(above);
                            callUp[above] = false;
                            callDown[above] = false;
                            return;
                        }
                        var under = self.elevator.currentFloor() - i
                        if (under >= 0 && (callDown[under] || callUp[under])) {
                            self.elevator.goToFloor(under);
                            callUp[under] = false;
                            callDown[under] = false;
                            return;
                        }
                    }
                }
            }

            self.elevator.on("idle", self.doSomething);

            self.elevator.on("floor_button_pressed", function(floorNum) {
                self.elevator.goToFloor(floorNum);
            });
            self.elevator.on("stopped_at_floor", function(floorNum) {
                callUp[floorNum] = false;
                callDown[floorNum] = false;
            })
        }

        for (var i = 0; i < floors.length; ++i) {
            var floor =  new Floor(floors[i]);
            floorList.push(floor);
        }

        for (var i = 0; i < elevators.length; ++i) {
            var elevator = new Elevator(elevators[i]);
            elevatorList.push(elevator);
        }

    },
    update: function(dt, elevators, floors) {
        // We normally don't need to do anything here
    }
}