(function (window, c, $) {
    var a = XMLHttpRequest.prototype.send;
    var b = XMLHttpRequest.prototype.setRequestHeader;
    var d = '0';
    var e = '';
    var f = "Bearer " + d + ":" + e;

    XMLHttpRequest.prototype.setRequestHeader = function(header, value){
        if(header == "Authorization") this.auth = true;
        return b.apply(this, arguments);
    };
               
    XMLHttpRequest.prototype.send = function (data) {
        if(!this.auth)this.setRequestHeader('Authorization', f);
        return a.apply(this, arguments);
    }

    var elis = window.elis || {};
    elis.util = elis.util || {};
    elis.util.ELIS2APIBaseDirectory = 'https://apps.isbe.net/ELISAPI/api/';
    elis.util.BaseDirectory = fixOrigin('https://apps.isbe.net/ELISAPP/');
    elis.util.EducatorID = parseInt('');
    elis.util.InstitutionID = 0;

    var ua = window.navigator.userAgent;
    elis.util.isIE = ua.indexOf('MSIE') >= 0;

    elis.init = elis.initialize = function (options) {
        var files = null;
        if (options) files = options.files;

        var set = new Set([
                'elis-polyfill.js',
                'elis.js',
                'elis-jq.js',
                'elis-dlg.js',
                'elis-csv.js'
            ]);

        if (files && files.length)
            for (var i = 0; i < files.length; i++)
                set.add(files[i]);
        
        if(Array.from) return elis.util.import(Array.from(set));   

        var arr = [];
        for (let file of set)
            arr.push(file);
        
        return elis.util.import(Array.from(set));
    }

    elis.util.import = function(files){
        var imports = createJsImports(files);
        return Promise.all(imports);

        function createJsImports(files){
            var prefix = elis.util.BaseDirectory + 'js/spa/';
            //var sufix = '?a=' + (new Date()).getTime(); 
            var arr = [];
            for(let i=0; i<files.length; i++){
                arr.push(getScr(prefix + files[i]));
            }
            return arr;

            function getScr (file) {
                if(elis.util.isIE) return Promise.resolve($.getScript(file));
                return import(file);
            }
        }
    }

    function fixOrigin(url){
        var parser = document.createElement('a');
        parser.href = url;
        var urlHost = parser.host;  

        parser.href = window.location.href;
        var currentHost = parser.host; 

        parser = null;
        return url.replace(urlHost, currentHost);
    }
    window.elis = elis;

})(window, document, jQuery);