elevator saga solution

{

    init: function(elevators, floors) {
        var sortedElevators = function(elevators){
            var tuples = [];
            var out = [];
            var debuglog = '';
            for (e = 0; e < elevators.length; e++) {
                if(elevators[e].loadFactor() < 0.6)
                    tuples.push([e, elevators[e].loadFactor()]);
            }
            tuples.sort(function(a, b) {
                a = a[1];
                b = b[1];
                return a < b ? -1 : (a > b ? 1 : 0);
            });
            for (i = 0; i < tuples.length; i++){
                out.push( tuples[i][0] );
                debuglog = debuglog + 'E' + tuples[i][0] + '(' +  tuples[i][1] + ') ';
            }
            console.log('Result: '  + debuglog);
            return out;
        }
        var goTo = function(elevators, elevatorNum, floorNum){
            elevator = elevators[elevatorNum];
            console.log('E: goTo E'+ elevatorNum + ' ' + floorNum + ' ' + elevator.direction);
            elevator.goToFloor(floorNum);

            elevator.destinationQueue.sort();
            if(elevator.direction == 'down')
                elevator.destinationQueue.reverse();
            elevator.checkDestinationQueue();

        }
        var elevatorStatus = function(elevators) {
            out = '\t\t\t\t\t';
            for (a = 0; a < elevators.length; a++) {
                out = out + 'E' + a + '@' + elevators[a].currentFloor();
                if(elevators[a].direction == 'up')
                    out = out + '^';
                else
                    out = out + 'v';
                out = out + ' (';
                for (i = 0; i < elevators[a].destinationQueue.length; i++) {
                    out = out + elevators[a].destinationQueue[i] + ' ';
                }
                out = out + ')';
                out = out + '[';
                for (i = 0; i < elevators[a].later.length; i++){
                    out = out + ' ' + elevators[a].later[i];
                }
                out = out + ']  -  ';
            }
            out = out + ' L: ';
            for (i = 0; i < globalLater.length; i++){
                out = out + ' ' + globalLater[i];
            }

            return out;
        }
        var showQueue = function(elevators) {
            console.log('showQueue: \t\t' + elevatorStatus(elevators));
        };

        console.log('o hai!');

        for (a = 0; a < elevators.length; a++){
            elevators[a].nr = a;
            elevators[a].later = [];
            elevators[a].goToFloor(0);
        }

        var globalLater = [];


        for (e = 0; e < elevators.length; e++) {

            elevators[e].on("idle", function() {
                console.log('E'+this.nr+': im IDLE');
                if(this.direction == 'up'){
                    this.direction = 'down';
                }
                else{
                    this.direction = 'up';
                }
                console.log('E'+this.nr+': new direction -> ' + this.direction + ' ' + elevatorStatus(elevators) );
                while(this.later.length){
                    f = this.later.pop();
                    goTo(elevators, this.nr, f);
                }

                while(this.destinationQueue.length < 3 && globalLater.length){
                    f = globalLater.pop();
                    goTo(elevators, this.nr, f);
                }

                showQueue(elevators);
                if(!this.destinationQueue.length) this.goToFloor(0);
            } );

            elevators[e].on("floor_button_pressed", function(floorNum) {
                console.log('### E'+this.nr+': floor_button_pressed: goto '+ floorNum);

                    if( ( this.direction == 'up' && floorNum >= this.currentFloor() ) ||
                       ( this.direction == 'down' && floorNum <= this.currentFloor() ) ){
                        goTo(elevators, this.nr, floorNum);
                    }
                    else{
                        this.later.push(floorNum);
                    }

                showQueue(elevators);
            } );
            elevators[e].on("stopped_at_floor", function(floorNum) {
                console.log('E'+this.nr+': stop @ floor:'+ floorNum + ' ' + elevatorStatus(elevators));

                showQueue(elevators);
            });
        }
        for (a = 0; a < floors.length; a++) {
            floors[a].on("up_button_pressed down_button_pressed", function() {
                console.log('###: up/down butt @ floor:'+ this.floorNum() + ' ' + elevatorStatus(elevators));
                service = 0;
                ele = sortedElevators(elevators);
                while(ele.length){
                    e = ele.shift();
                    if( (elevators[e].direction == 'up' && this.floorNum() >= elevators[e].currentFloor() ) ||
                            (elevators[e].direction == 'down' && this.floorNum() <= elevators[e].currentFloor() ) ){
                        goTo(elevators, e, this.floorNum());
                        service = 1;
                        break;
                    }
                }
                if(!service){
                    globalLater.push(this.floorNum());
                }
                showQueue(elevators);
            } );
        }

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

}