//
//  detachAvatarEntity.js
//
//  Created by Rebecca Stankus on 09/08/17.
//  Copyright 2017 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
// This script detaches an avatar entity from the parent joint when it is moved beyond a certain distance from its parent joint

(function () {
    var _entityID, entityPosition, parentJointIndex, parentPosition, checkDetach;
    

    this.preload = function(entityID) {
        _entityID = entityID;
        var properties = Entities.getEntityProperties(_entityID, ["position", "parentJointIndex"]);
        entityPosition = properties.position;
        parentJointIndex = properties.parentJointIndex;
        parentPosition = MyAvatar.getJointPosition(parentJointIndex);
    };
    
    // continuously check distance between parent joint and attachment entity. remove parent relationship when moved beyond a certain distance
    this.continueNearGrab = function(){
        checkDetach = Script.setInterval(function() {
            entityPosition = Entities.getEntityProperties(_entityID, 'position').position;
            var distanceToParent = Vec3.distance(entityPosition, parentPosition);
            var detachDistance = 0.6;
            if (distanceToParent > detachDistance) {
                Entities.editEntity(_entityID, {parentID: "{00000000-0000-0000-0000-000000000000}"});
                Script.clearInterval(checkDetach);
            } 
        }, 100);
    };

    this.releaseGrab = function(){
        if (checkDetach){
            try {
                Script.clearInterval(checkDetach);
            } catch (e) {
                print("Error stopping interval.");
            }
        }
    };
    
    this.unload = function(){
        if (checkDetach){
            try {
                Script.clearInterval(checkDetach);
            } catch (e) {
                print("Error stopping interval.");
            }
        }
    };
});