//
//  elevator.js
//
//  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
/* globals Script Entities Vec3 */

(function() {
  
    var POINT_A = {x: 86.5248, y: -6.1959, z: 38.0987};
    var POINT_B = {x: 86.5248, y: -14.5854, z: 38.0987};
    var PAUSE_TIME = 4; // seconds
    var MOVE_TIME = 5;
    var goingUp = true;
    var _entityID;
    var pause = false;
    var check = false;
    var startPauseTime;

    var upVelocity;
    var downVelocity;

    this.preload = function(entityID) {
        _entityID = entityID;

        var upDirection = Vec3.subtract(POINT_A, POINT_B);
        var downDirection = Vec3.subtract(POINT_B, POINT_A);

        upVelocity = Vec3.multiply(upDirection, 1 / MOVE_TIME);
        downVelocity = Vec3.multiply(downDirection, 1 / MOVE_TIME);
        stopVelocity = Vec3.ZERO;

        Entities.editEntity(function() {
            Entities.editEntity(_entityID, {
                position: POINT_B,
            });
        });

        Script.update.connect(update);

        startMovement(goingUp);

        // Script.setInterval(function() {
        //     movePlatform(goingUp);
        //     goingUp = !goingUp;
        // }, (PAUSE_TIME + MOVE_TIME) * 1000);
    };
  
    // var movePlatform = function(isGoingUp) {
    //     var from = isGoingUp ? POINT_A : POINT_B;
    //     var to = isGoingUp ? POINT_B : POINT_A;
    //     var moveTime = MOVE_TIME;
    //     var moveDirection = Vec3.subtract(to , from);
    //     var moveVelocity = Vec3.multiply(moveDirection, 1 / moveTime);
    //     Entities.editEntity(_entityID, {
    //         velocity: moveVelocity,
    //         position: from,
    //         damping: 0
    //     });

    //     Script.setTimeout(function() {
    //         Entities.editEntity(_entityID, {
    //             velocity: {x: 0, y: 0, z: 0},
    //             position: to
    //         });
    //     }, moveTime * 1000);

    // };
    
    var update = function (dt) {
    
        var position = Entities.getEntityProperties(_entityID, "position").position;
    
        if (pause === true) {
            var now = Date.now();
            if (startPauseTime) {
                var elapsed = now - startPauseTime;
                if(elapsed > (PAUSE_TIME * 1000)) {
                    print("I'm done stopping!")
                    pause = false;
                    goingUp = !goingUp;
                    startMovement(goingUp);
                    startPauseTime = null;
                }
            } else {
                startPause();
            }
        } else if (goingUp && position.y >= POINT_A.y ) { // highest position
            print("I'm up!")
            startPause(POINT_A);
        } else if (!goingUp && position.y <= POINT_B.y) { // lowest position
            print("I'm low!")
            startPause(POINT_B);
        }
    }
    
    var startPause = function (position) {
        print("PAUSE");
        pause = true;
        Entities.editEntity(function() {
            Entities.editEntity(_entityID, {
                position: position,
                velocity: stopVelocity,
                damping: 0
            });
        });
        startPauseTime = Date.now();
    }
    
    var startMovement = function (isGoingUp) {
        print("STARTMOVE");
    
        var newVelocity = isGoingUp ? upVelocity : downVelocity;
    
        Entities.editEntity(function() {
            Entities.editEntity(_entityID, {
                velocity: newVelocity,
                damping: 0
            });
        });
    }

    this.unload = function () {
        Script.update.disconnect(update);
    }
});