var adsScriptTag = document.getElementById('lv-ads');
var observer = new MutationObserver(function (mutations) {
    mutations.forEach(function (mutation) {
        if (mutation.type === "attributes") {
            handleAdRequest();
        }
    });
});
observer.observe(adsScriptTag, {
    attributes: true
});
adsScriptTag.addEventListener("load", function () {
    handleAdRequest();
});

function handleAdRequest() {
    var adAttributes = getAdScriptTagAttributes();
    if (adAttributes.keyword && adAttributes.integrationId) {
        var requestUrl = buildRequestUrl(adAttributes);
        var response = makeAdRequest(requestUrl);
        handleAdResponse(response, adAttributes);
    }
}

function getAdScriptTagAttributes() {
    var adNumber = adsScriptTag.getAttribute('data-ad-number');
    var attributes = {
        integrationId: adsScriptTag.getAttribute('data-integration-id'),
        jsonpAttributeValue: adsScriptTag.getAttribute('data-jsonp'),
        adNumber: adNumber === "" ? 3 : adNumber
    };
    attributes['functionName'] = attributes.jsonpAttributeValue === "" ? "handleAds" : attributes.jsonpAttributeValue;
    attributes['keyword'] = adsScriptTag.hasAttribute('data-keyword') ? adsScriptTag.getAttribute('data-keyword') : null;

    return attributes;
}

function buildRequestUrl(adAttributes) {
    var _localStorage$getItem;
    var subId = (_localStorage$getItem = localStorage.getItem('subId')) !== null && _localStorage$getItem !== void 0 ? _localStorage$getItem : "";
    var baseUrl = 'https://ad-server.linkvertise.com';
    var endpoint = '/ads?';
    return baseUrl + endpoint + 'keyword=' + adAttributes.keyword + '&integration_id=' + adAttributes.integrationId + '&ad_number=' + adAttributes.adNumber + '&sub_id=' + subId;
}

function makeAdRequest(requestUrl) {
    return fetch(requestUrl).then(function (response) {
        return response.json();
    });
}

function handleAdResponse(response, adAttributes) {
    response.then(function (data) {
        if (data.subId) {
            localStorage.setItem('subId', data.subId);
        }
        if (data.ads && data.ads.length > 0) {
            this[adAttributes.functionName](data.ads);
        } else {
            this[adAttributes.functionName](null);
        }
    })["catch"](function (error) {
        console.log("Error: " + error);
    });
}