//
// soundZone.js
// An entity script on a zone that pulls sound URLS from the zone's user data
// 
// Author: Elisa Lupin-Jimenez
// Copyright High Fidelity 2018
//
// Licensed under the Apache 2.0 License
// See accompanying license file or http://apache.org/
//
// All assets are under CC Attribution Non-Commerical
// http://creativecommons.org/licenses/
//

(function() {

    var HALF_MULTIPLIER = 0.5;
    var VOLUME = 0.5;

    var SOUNDS = [];
    // sounds from http://www.grsites.com
    var SOUND_URLS;

    var zoneProperties;

    this.preload = function(entityID) {
        zoneProperties = Entities.getEntityProperties(entityID, ["position", "dimensions", "rotation", "userData"]);
        SOUND_URLS = JSON.parse(zoneProperties.userData).soundURLs;
        SOUND_URLS.forEach(function(url) {
            SOUNDS.push(SoundCache.getSound(Script.resolvePath(url)));
        });
    };

    function isPositionInsideBox(position, boxProperties) {
        var localPosition = Vec3.multiplyQbyV(Quat.inverse(boxProperties.rotation),
            Vec3.subtract(position, boxProperties.position));
        var halfDimensions = Vec3.multiply(boxProperties.dimensions, HALF_MULTIPLIER);
        return -halfDimensions.x <= localPosition.x &&
                halfDimensions.x >= localPosition.x &&
               -halfDimensions.y <= localPosition.y &&
                halfDimensions.y >= localPosition.y &&
               -halfDimensions.z <= localPosition.z &&
                halfDimensions.z >= localPosition.z;
    }

    function isSomeAvatarOtherThanMeStillInsideTheObject(objectProperties) {
        var result = false;
        AvatarList.getAvatarIdentifiers().forEach(function(avatarID) {
            var avatar = AvatarList.getAvatar(avatarID);
            if (avatar.sessionUUID !== MyAvatar.sessionUUID) {
                if (isPositionInsideBox(avatar.position, objectProperties)) {
                    result = true;
                }
            }
        });
        return result;
    }

    function playSound() {
        var size = SOUNDS.length - 1;
        var index = Math.round(Math.random() * size);
        var sound = SOUNDS[index];
        Audio.playSound(sound, {
            volume: VOLUME,
            position: zoneProperties.position
        });
    }

    this.enterEntity = function(entityID) {
        print("sound zone entered");
        if (!isSomeAvatarOtherThanMeStillInsideTheObject(zoneProperties)) {
            playSound();
        }
    };

});