"use strict";

angular.module("vocabulary")
    .service("accessRestriction", ["$q", "adminReports", "loginAndContinueService", "exceptionService", "premadeApi", function ($q, adminReports, loginAndContinueService, exceptionService, premadeApi) {

        var teacherAuthorizationData = [];

        return {
            enforceRestriction: enforceRestriction,
            hasAccess: hasAccess,
            userIsLoggedIn: userIsLoggedIn,
            getTeacherAuthData: getTeacherAuthData
        };

        function enforceRestriction(data, redirectUrl) {
            return enforceLoginRestriction(data, redirectUrl)
                .then(adminReports.alertIfReportsOnly);
        }

        function userIsLoggedIn() {
            return loginAndContinueService.isAuthorized();
        }

        function hasAccess() {
            return userIsLoggedIn() && !adminReports.hasReportsOnlyAccess();
        }

        function enforceLoginRestriction(data, redirectUrl) {
            return $q.when(loginAndContinueService.loginIfNotAuthorized(data, redirectUrl))
                .then(function (resp) {
                    if (!resp) {
                        throw exceptionService.getAuthorizationException("NOT AUTHORIZED");
                    }
                });
        }

        function getTeacherAuthData() {
            return ensureTeacherAuthIsInitialized()
                .then(function () { return teacherAuthorizationData; });
        }

        function ensureTeacherAuthIsInitialized() {
            return teacherAuthIsInitialized() ? $q.resolve() : initializeTeacherAuth();
        }

        function teacherAuthIsInitialized() {
            return Object.keys(teacherAuthorizationData).length > 0;
        }

        function initializeTeacherAuth(){
            return premadeApi.teacherInfo()
                .then(function(AuthData){ teacherAuthorizationData = AuthData; });
        }

    }]);