var d21_ibe_api_host = 'https://ibe-api-v4-default.dirs21.de';

(function(){
    //
    var isValidLanguage = function(lang){
        var validLanguages = ['de','en','fr', 'es','it','ru','zh','nl'];

        lang = lang != null ? lang.toLowerCase() : lang;
        var result = false;
        if(lang == null) return result;

        for(var i = 0; i < validLanguages.length; i++){
            if(lang.indexOf(validLanguages[i]) >= 0 && lang.length <= 5){
                result = true;
            }
        }

        return result;
    };

    window.d21LogTime = function (key) {
        if (window.d21_time) {
            console.log(key, new Date() - window.d21_time);
        }
    }

    window.d21_widgetStart = function(){
        if (window.d21_sdk_init) return;

        window.d21_sdk_init = true;

        // Add basket
        if (window.d21 === undefined || (window.d21 !== undefined && window.d21 != null &&  window.d21['Version'] != undefined)) {
            var basketJS = document.createElement("script");
            basketJS.src = "https://cdnjs.cloudflare.com/ajax/libs/basket.js/0.5.2/basket.full.min.js";
            document.body.appendChild(basketJS);
        }

        // detect language
        // 1. by html-tag
        var htmlTagLang = document.getElementsByTagName("Html")[0].getAttribute("lang");
        var browserLang = htmlTagLang && htmlTagLang.length >= 2 ? htmlTagLang.substring(0,2).toLowerCase() : undefined;

        // 2. by meta-tag
        if(browserLang == undefined) {
            var metas = Array.prototype.slice.call(document.getElementsByTagName('meta'));

            metas.forEach(function(m,index){
                if(browserLang == undefined) browserLang = isValidLanguage(m.getAttribute('content')) ? m.getAttribute('content').substring(0,2).toLowerCase() : undefined;
            });

        }

        // 3. default value de-DE
        if(browserLang != undefined) {
            browserLang = browserLang + '-' + browserLang.toUpperCase();
        }
        else {
            browserLang = "de-DE";
        }


        // Write main script with detected language
        var hasRequireJs = window.d21 !== undefined && window.d21 !== null && window.d21['version'] !== undefined;
        var d21SdkJS = document.createElement("script");
        d21SdkJS.src = "https://widgets-default.dirs21.de" + "/widgets/141c9c72-f027-48bd-8e23-a5fc09c064e0/" + browserLang + '/False' + (hasRequireJs ? '?v=1.1&b=4.1' : '?b=4.1');
        d21SdkJS.async = true;
        d21SdkJS.type= "text/javascript";
        document.body.appendChild(d21SdkJS);

        window.d21LogTime("d21_widgets_start");
        }

        window.addEventListener("DOMContentLoaded", function d21StartSDK(){
        window.removeEventListener("DOMContentLoaded", d21StartSDK, false);
        d21_widgetStart();
        });

        window.addEventListener("load", function d21StartSDK(){
        window.removeEventListener("load", d21StartSDK, false);
        d21_widgetStart();
        });
        })();