(function () {

    var entityID;
    var code;
    var loggedIn;
    var overlayID;
    var overlayID2;

    var interval;

    var Y_OFFSET = 1.5; // m
    var REMOVE_OVERLAY_TIME = 10000;

    var CODE = "L M B I";
    var INSTRUCTIONS_URL = "https://hifi-content.s3.amazonaws.com/alan/dev/PCC-Code-Message.fbx";

    var NOT_LOGGED_IN_TEXT = "You must be logged in!";

    var CODE_DIMENSIONS = {x: 0.6, y: 0.3, z: 0.1};
    var TEXT_DIMENSIONS = {x: 1.2, y: 0.3, z: 0.1};

    var removeFlag = false;

    var DEBUG = false;

    function CodeGetter () {}

    CodeGetter.prototype = {
        remotelyCallable: [
            "displayCode",
            "displayError"
        ],

        preload: function (id) {
            entityID = id;
        },

        startNearTrigger: function () {
            if (DEBUG) { print("startNearTrigger"); }

            this.startGetCode();
        },

        startFarTrigger: function () {
            if (DEBUG) { print("startFarTrigger"); }

            this.startGetCode();
        },

        clickReleaseOnEntity: function (id, pointerEvent) {
            if (DEBUG) { print("clickReleaseOnEntity"); }
            if (pointerEvent.isPrimaryButton) {
                this.startGetCode();
            }
        },

        startGetCode: function () {

            if (DEBUG) { print("startGetCode"); }

            loggedIn = AccountServices.loggedIn;

            if (!loggedIn) {
                this.createOverlay(NOT_LOGGED_IN_TEXT);
                this.handleNotLoggedIn();
                return;
            }

            if (DEBUG) { print("yes logged in"); }

            // var uuid = MyAvatar.sessionUUID;
            // var username = AccountServices.username;

            // if (!code) {
                if (DEBUG) { print("calling getCode"); }
                code = CODE;
                this.createOverlay(CODE);
                // Entities.callEntityServerMethod(entityID, "getCode", [uuid, username]);
            // }

            // var text = code ? code : FETCHING_TEXT;
            // this.createOverlay(text);
        },

        handleNotLoggedIn: function () {

            if (DEBUG) { print("handle not logged in"); }
            var _this = this;

            if (!setupNotLoggedIn) {
                AccountServices.loggedInChanged.connect(loggedIn);
            }
    
            function loggedIn() {
                AccountServices.loggedInChanged.disconnect(loggedIn);
                _this.startGetCode();
            }
        },
        
        createOverlay: function (text) {

            if (DEBUG) { print("create overlay"); }
            
            if (!overlayID) {
                var properties = Entities.getEntityProperties(entityID, ["position"]);
                var position = properties.position;
        
                var overlayPosition = position;
                position.y = position.y + Y_OFFSET;

                var dimensions = code === text ? CODE_DIMENSIONS : TEXT_DIMENSIONS;
                
                overlayID = Overlays.addOverlay("text3d", {
                    position: overlayPosition,
                    isFacingAvatar: true,
                    dimensions: dimensions,
                    lineHeight: 0.15,
                    text: text,
                    backgroundAlpha: 0.3,
                    name: "PPS Code Overlay"
                    // parent: entityID
                });

                var positionInstructions = {
                    x: overlayPosition.x,
                    y: overlayPosition.y + 0.2,
                    z: overlayPosition.z
                };

                if (code) {
                    overlayID2 = Overlays.addOverlay("model", {
                        position: positionInstructions,
                        url: INSTRUCTIONS_URL,
                        isFacingAvatar: true,
                        dimensions: {
                            x: 1.0939,
                            y: 0.7933,
                            z: 0.0010
                        },
                        name: "PPS Code Overlay Instructions"
                    })
                }

                if (!interval) {
                    var interval = Script.setInterval(function () {
                        Overlays.editOverlay(overlayID2, {
                            rotation: Quat.cancelOutRollAndPitch(Quat.lookAtSimple(positionInstructions, Camera.position))
                        })
                    }, 50);
                }
            } else {

                Overlays.editOverlay(overlayID, {
                    text: text
                })

            }

            if (code) {
                this.setTimeoutToRemoveOverlay();
            }
        },

        // called remotely
        displayCode: function (sessionUUID, param) {
            if (DEBUG) { print("display code", sessionUUID, typeof param); }

            code = param[0].split("").join(" ");

            if (overlayID) {
                Overlays.editOverlay(overlayID, {
                    text: code,
                    dimensions: CODE_DIMENSIONS
                })
            }

            this.setTimeoutToRemoveOverlay();
        },

        setTimeoutToRemoveOverlay: function () {
            if (removeFlag === false) {
                removeFlag = true;
                var _this = this;
                Script.setTimeout(function () {
                    _this.removeOverlay(overlayID);
                    if (interval) {
                        Script.clearInterval(interval);
                    }
                    removeFlag = false;
                }, REMOVE_OVERLAY_TIME);

            }
        },

        removeOverlay: function () {
            if (DEBUG) { print("remove overlay"); }
            Overlays.deleteOverlay(overlayID);
            overlayID = null;
            if (overlayID2) {
                Overlays.deleteOverlay(overlayID2);
                overlayID2 = null;
            }
        },

        unload: function () {
            if (overlayID) {
                this.removeOverlay();
            }
            if (overlayID2) {
                Overlays.deleteOverlay(overlayID2);
                overlayID2 = null;
            }

        }

    }

    return new CodeGetter();
});