/* 

Minigolf Cup sound player.

by Piper.Peppercorn October 2016

Plays a sound when a ball falls into the cup.

Then prepares the ball to self-delete after one minute.

Handles multiple balls if more than one player is active.

Distributed under the CreativeCommons license

*/


(function(){
    const BALL_IN_CUP_SOUND_URL = "http://hifi-content.s3.amazonaws.com/caitlyn/production/minigolf%20course/mg_ball_in_cup_sound.wav";
    const VICTORY_SOUND_URL = "https://dl.dropboxusercontent.com/u/96759331/victory2.wav";
    const SOUND_VOLUME = 1.0; // Range of 0.0 silent to 1.0 full volume.
    const ONE_SECOND = 1000;
    const ONE_MINUTE = 60;
    const ZERO_GRAVITY = {"x": 0.0, "y": 0.0, "z": 0.0}
    const CUP_VERTICAL_POSITION_ADJUSTMENT = 0.015; // Ensure balls don't trigger until they have fallen into the cup.
    const DYNAMIC = 1;
    const STATIC = 0;
    var _this = this;
    var timer;
    var interval = ONE_SECOND * 0.5;
    var sensorBox;


    var main = function() {
        var validEntities = getValidEntitiesInSensorBox(sensorBox, "Sphere", DYNAMIC);
        while(validEntities.length > 0) {
            var entity = validEntities.pop();
            triggerSoundAtEntity(
                _this.BALL_SOUND,
                SOUND_VOLUME,
                entity.position
            );
            triggerSoundAtEntity(
                _this.VICTORY_SOUND,
                SOUND_VOLUME,
                entity.position
            );
            // Deactivate the ball set to vanish after one minute.
            var newProps = {
                gravity: ZERO_GRAVITY,
                dynamic: STATIC,
                lifetime: ONE_MINUTE
              };
            Entities.editEntity(entity.id, newProps);
        }
    };

// Helper functions

    var getValidEntitiesInSensorBox = function(sensor, entityType, dynamicState) {
        var entitiesInBox = Entities.findEntitiesInBox(sensor.corner, sensor.size);
        var validated = [];
        for(var ent in entitiesInBox) {
            var currentEntity = Entities.getEntityProperties(entitiesInBox[ent]);
            if (currentEntity.type == entityType && currentEntity.dynamic == dynamicState) {
                validated.push(currentEntity);             
            }
        }
        return validated;
    };


    var setupSensorBox = function(objectID) {
        var boxProperties =  Entities.getEntityProperties(objectID);
        var boxDimensions = boxProperties.dimensions;
        var pos = boxProperties.position;
        var boxCorner = {
            x:pos.x - (boxDimensions.x * 0.5),
            y:pos.y - (boxDimensions.y * 0.5) - CUP_VERTICAL_POSITION_ADJUSTMENT,
            z:pos.z - (boxDimensions.z * 0.5)
        };
        return {"corner": boxCorner, "size": boxDimensions};
    };


    var triggerSoundAtEntity = function(sound, soundVolume, entityPosition) {
        var soundProps = {
            volume: soundVolume,
            position: entityPosition
        };
        Audio.playSound(sound, soundProps);
    };


    _this.preload = function(ID) {    
        _this.BALL_SOUND = SoundCache.getSound(BALL_IN_CUP_SOUND_URL);
        _this.VICTORY_SOUND = SoundCache.getSound(VICTORY_SOUND_URL);
        sensorBox = setupSensorBox(ID);
        timer = Script.setInterval(main, interval);
    };
})