(function () {

    // var URL = "https://script.google.com/macros/s/AKfycbzrcCSD4f2Qq4NEtlV1xlGgkQX6tYq3z9_RgpgYyXtne73-jQ/exec";

    var live = {};
    var previous = {};
    var interval = null;

    var isOn = true;

    var DEBUG = true;

    var COLOR_LOGGEDIN = { red: 0, blue: 0, green: 255 };
    var COLOR_ANONYMOUS_USER = { red: 255, blue: 0, green: 0 };
    var COLOR_PENDING = { red: 255, blue: 255, green: 255 };

    var button;

    var buttonName = "SEEK ANONYMOUS";
    var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");

    button = tablet.addButton({
        icon: "http://hifi-content.s3-us-west-1.amazonaws.com/robin/dev/domains/loadtest/Checkin/V2_Checkin/check-in-i.svg",
        activeIcon: "http://hifi-content.s3-us-west-1.amazonaws.com/robin/dev/domains/loadtest/Checkin/V2_Checkin/check-in-a.svg",
        text: buttonName,
        isActive: true,
        // sortOrder: 4
    });

    button.clicked.connect(toggleStatusOverlays);

    function start() {

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

        interval = Script.setInterval(function () {
            if (DEBUG) {
                print("INTERVAL");
            }

            newList = AvatarList.getAvatarsInRange(MyAvatar.position, 5);

            // add user to rendered overlays
            for (var a = 0; a < newList.length; a++) {
                if (DEBUG) {
                    print("LOOP2");
                }

                var uuid = newList[a];

                var hasUUID = uuid;
                var isMyUUID = MyAvatar.sessionUUID === uuid;
                var isInLiveList = live[uuid] !== undefined;


                if (DEBUG) {
                    print(hasUUID, !isMyUUID, !isInLiveList);
                }

                var uuid = newList[a];
                if (hasUUID && !isMyUUID && !isInLiveList) {

                    addUserCreateOverlay(uuid);

                }
            }

            // remove
            for (var uuid in live) {

                if (DEBUG) {
                    print("LOOP1");
                }

                var hasUUID = uuid;
                var isMyUUID = MyAvatar.sessionUUID === uuid;
                var isInNewList = newList.indexOf(uuid) !== -1;

                if (DEBUG) {
                    print("REMOVAL HEE", hasUUID, !isMyUUID, !isInNewList);
                }

                if (hasUUID && !isMyUUID && !isInNewList) {
                    if (DEBUG) {
                        print("REMOVE", live[uuid].overlayID);
                    }

                    var overlayToDelete = live[uuid].overlayID;
                    Overlays.deleteOverlay(overlayToDelete);

                    delete live[uuid];
                }
            }

        }, 1000);
    }

    // function encodeURLParams(params) {
    //     var paramPairs = [];
    //     for (var key in params) {
    //         paramPairs.push(key + "=" + params[key]);
    //     }
    //     return paramPairs.join("&");
    // }

    function addUserCreateOverlay(uuid) {
        if (DEBUG) {
            print("ADD USER CREATE OVERLAY");
        }

        var data = AvatarManager.getAvatar(uuid);
        var previousInfo = previous[uuid];

        var isNewEntry = previousInfo === undefined;

        var overlayProperties = {
            position: data.position,
            dimensions: { x: 0.3, y: 0.3, z: 0.3 },
            solid: true,
            parentID: uuid,
            color: isNewEntry 
                ? COLOR_PENDING 
                : previousInfo.isLoggedIn 
                    ? COLOR_LOGGEDIN 
                    : COLOR_PENDING,
            drawInFront: true
        };

        var overlayID = Overlays.addOverlay("sphere", overlayProperties);

        var toAdd = {
            sessionUUID: uuid,
            overlayID: overlayID,
            displayName: isNewEntry ? data.displayName : previousInfo.displayName
        };

        if (isNewEntry || previousInfo.isLoggedIn === false) {
            Users.requestUsernameFromID(uuid);
        }

        live[uuid] = toAdd;
    }

    function setLoggedInStatus(uuid, username, machineFingerprint, isAdmin) {
        if (DEBUG) {
            print("SET USERNAME");
        }

        var isLoggedIn = username ? true : false;
        var color = getOverlayColor(isLoggedIn);

        if (live[uuid] !== null) {
            live[uuid].isLoggedIn = isLoggedIn;
            Overlays.editOverlay(live[uuid].overlayID, {color: color});
        }

        var previousInfo = {
            isLoggedIn: isLoggedIn
        };

        previous[uuid] = previousInfo;
        // previous[uuid] === live[uuid];
    }

    function toggleStatusOverlays () {
        isOn = !isOn;

        print("TOGGLE", isOn);
        
        button.editProperties({isActive: isOn});

        if (isOn) {
            start();
        } else {
            stopInterval();
            removeOverlays();
        }
        
    }

    function getOverlayColor(isLoggedIn) {
        var color;

        if (isLoggedIn) {
            color = COLOR_LOGGEDIN;
        } else {
            color = COLOR_ANONYMOUS_USER;
        }

        return color;

    }

    function unload() {

        button.clicked.disconnect(toggleStatusOverlays);
        if (tablet) {
            tablet.removeButton(button);
        }

        stopInterval();
        removeOverlays();

        Users.usernameFromIDReply.disconnect(setLoggedInStatus);
    }

    function removeOverlays () {


        for (var key in live) {
            var overlayToDelete = live[key].overlayID;

            print("DELETE", overlayToDelete);
            Overlays.deleteOverlay(overlayToDelete);
        }

        live = {};
    }

    function stopInterval () {
        if (interval) {
            Script.clearInterval(interval);
        }
    }

    Script.scriptEnding.connect(unload);
    Users.usernameFromIDReply.connect(setLoggedInStatus);

    start();

})();