(function () {

    /* in userData root object

        feedback: {
            eventName: "LoadTest_11_17_2018",
            url: <optional>
        },
        signup: {
            linkURL: "eventbrite.com",
            url: <optional>
        },
        apps: []
    
    */
    
    var FEEDBACK_CURRENT_EVENTNAME = "io.highfidelity.feedbackApp.currentEventName";

    var SIGNUP_APP_SETTING = 'io.highfidelity.signup.app.url';

    var appList = [];
    var userData;

    var feedback = {
        /*
            feedback: {
                eventName: "LoadTest_11_17_2018"
            }
        */
        isSetup: false,
        defaultURL: "http://hifi-content.s3-us-west-1.amazonaws.com/Experiences/LoadTest/AppLoader/Apps/Feedback/feedback_loader.js",
        url: "",
        setup: function () {
            this.isSetup = true;

            Settings.setValue(FEEDBACK_CURRENT_EVENTNAME, userData.feedback.eventName);

            this.url = userData.feedback.url ? userData.feedback.url : this.defaultURL;
            var url = this.url;
            Script.setTimeout(function () {
                ScriptDiscoveryService.loadScript(url);
            }, 500);
        },
        unload: function () {
            this.isSetup = false;
            ScriptDiscoveryService.stopScript(this.url);
        }
    }

    var signup = {
        /*
            signup: {
                linkURL: "eventbrite.com"
            }
        */
        isSetup: false,
        defaultURL: "http://hifi-content.s3-us-west-1.amazonaws.com/Experiences/LoadTest/AppLoader/Apps/Signup/SignupApp_loader.js",
        url: "",
        setup: function () {
            this.isSetup = true;

            if (userData.signup.linkURL) {
                Settings.setValue(SIGNUP_APP_SETTING, userData.signup.linkURL);
            }

            this.url = userData.signup.url ? userData.signup.url : this.defaultURL;
            var url = this.url;
            Script.setTimeout(function () {
                ScriptDiscoveryService.loadScript(url);

            }, 500);
            
        },
        unload: function () {
            this.isSetup = false;
            ScriptDiscoveryService.stopScript(this.url);
        }
    }

    var AppsToLoad = function () {}

    AppsToLoad.prototype = {
        preload: function (id) {
            var properties = Entities.getEntityProperties(id, ["userData"]);

            try {
                userData = JSON.parse(properties.userData);
            } catch (e) {
                console.error("Error parsing userData: ", e);
            }

            if (userData) {
                if (userData.feedback) {
                    feedback.setup();
                }
                if (userData.signup) {
                    signup.setup();
                }
                if (userData.apps) {

                    if (Array.isArray(userData.apps)) {
                        appList = userData.apps;
                        var scriptList = ScriptDiscoveryService.getRunning();

                        appList.forEach(function (url) {
                            if (scriptList.indexOf(url) === -1) {
                                ScriptDiscoveryService.loadScript(url);
                            }
                        });
                    } else {
                        console.error("AppsToLoad: userData.apps is not an array!");
                    }
                } 
            }

        },
        unload: function () {
            if (feedback.isSetup) {
                feedback.unload();
            }
            if (signup.isSetup) {
                signup.unload();
            }
            if (appList.length) {
                appList.forEach(function (url) {
                    ScriptDiscoveryService.stopScript(url);
                });
            }
        }
    };

    return new AppsToLoad ();
})