if (window.Element && !Element.prototype.closest) {
        Element.prototype.closest =
            function (s) {
                var matches = (this.document || this.ownerDocument).querySelectorAll(s),
                    i,
                    el = this;
                do {
                    i = matches.length;
                    while (--i >= 0 && matches.item(i) !== el) { };
                } while ((i < 0) && (el = el.parentElement));
                return el;
            };
    }

    (function (w, d) {
        var widgetUrl = "https://widget.trustist.com";
        var assetUrl = "https://widgetassets.trustist.com";
        var businessKey = "81_3o3x6";
        var locationKey = "dbr_05ca";
        var tenantKey = "";
        var tag = "";
        var activeWidgets = [];
        var accessToken = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbnRpdHlJZCI6ImRicl8wNWNhIiwiZXhwIjoxNzg4Nzk0MTI1LCJpc3MiOiJUcnVzdGlzdCIsImF1ZCI6IldpZGdldHMifQ.DelrMVNkYWDyX1YzUpJmExNDdK07q7MqC4ne5Nr8vWI";
        var accessTokenExpiry = "1788794125000";
        var refreshToken = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJlbnRpdHlJZCI6ImRicl8wNWNhIiwianRpIjoiNzRlNTdkMjMtOWMwYi00ZmQ2LThjMjUtY2Q1YzVlYmRhZTc1IiwiZXhwIjoxNzg4OTY2MzI1LCJpc3MiOiJUcnVzdGlzdCIsImF1ZCI6IldpZGdldHMifQ.t697ZhTVctcsv6wuBmJDv8PoE9k0HIkvcyy5hbWSSeI";

        var template = '<div class="cleanslate ts-reviewList"><div class="ts-reviewlist-logo">&nbsp;</div><!--reviewListContent--><!--paginator--></div>';
        var paginator = '<button id="tsLoadMore">Load More</button>';

        function start(f) { /in/.test(document.readyState) ? setTimeout(start, 5, f) : f(); }

        // add tags
        tsAddCssTag(assetUrl + "/css/cleanslate.css");
        tsAddCssTag(assetUrl + "/css/reviewlist.css");

        w.trustist ??= {};
        w.trustist.reviewList = {
            draw: function () {
                // iterate over all widgets on the page and render
                var divs = d.querySelectorAll("[ts-reviewListWidget],div.ts-reviewListWidget");
                if (divs.length === 0) {
                    return;
                }
                for (var i = 0; i < divs.length; i++) {
                    tsDisplayWidget(divs[i], tenantKey, businessKey, locationKey);
                }
            }
        };

        start(w.trustist.reviewList.draw);

        function tsDisplayWidget(target, tenantKey, businessKey, locationKey) {
            // get options before cleanslate
            var options = tsReadAttributes(target);

            // see if the widget requested a different location
            var lkey = options.locationKey || locationKey;
            var bkey = options.businessKey || businessKey;
            var tkey = options.tenantKey || tenantKey;
            var tagkey = options.tag || tag;

            // set the target's identifiers for later drawing
            target.setAttribute("ts-location", lkey);
            target.setAttribute("ts-business", bkey);
            target.setAttribute("ts-tenant", tkey);
            target.setAttribute("ts-tag", tagkey);

            // store this widget for later
            activeWidgets.push({
                locationKey: lkey,
                businessKey: bkey,
                tenantKey: tkey,
                tag: tagkey,
                currentPage: 1,
                pageSize: options.pageSize,
                currentReviewCount: 0,
                totalReviewCount: 0
            });

            // put the container on the page
            target.innerHTML = template
                .replace("{{font-family}}", options.fontFamily)
                .replace("{{color}}", options.color);

            // draw summary
            var xhr2 = new XMLHttpRequest();
            var url = tsBuildSummaryUrl(widgetUrl, tkey, bkey, lkey, tagkey);
            xhr2.open("GET", url);
            xhr2.onload = function () {
                if (xhr2.status === 200 && xhr2.responseText !== "") {
                    var summary = JSON.parse(xhr2.responseText);

                    // set the review count on the active widget
                    tsSetActiveWidgetValue(tenantKey, businessKey, locationKey, tagkey, "totalReviewCount", summary.reviewCount);

                    // load and draw reviews
                    tsLoadReviews(target, tenantKey, businessKey, locationKey, tagkey, options);
                }
            };
            xhr2.send();
        }

        function tsGetActiveWidget(tenantKey, businessKey, locationKey, tag) {
            var filtered = activeWidgets.filter(function (o) {
                return o.tenantKey === tenantKey && o.businessKey === businessKey && locationKey === locationKey && tag === tag;
            });
            return filtered[0];
        }

        function tsSetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, key, value) {
            var activeWidget = tsGetActiveWidget(tenantKey, businessKey, locationKey, tag);
            activeWidget[key] = value;
        }

        function tsGetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, key) {
            var activeWidget = tsGetActiveWidget(tenantKey, businessKey, locationKey, tag);
            return activeWidget[key];
        }

        function tsAddToActiveWidgetValue(tenantKey, businessKey, locationKey, tag, key, value) {
            var activeWidget = tsGetActiveWidget(tenantKey, businessKey, locationKey, tag);
            activeWidget[key] += value;
        }

        function shouldRefreshToken() {
            var currentTime = new Date().getTime();
            var oneMinuteInMilliseconds = 60000;
            return currentTime > (accessTokenExpiry - oneMinuteInMilliseconds);
        }

        function tsRefreshAccessToken(tenantKey, businessKey, locationKey, callback) {
            if (!shouldRefreshToken()) {
                callback();
                return;
            }

            var url = widgetUrl + "/refreshToken?refreshToken=" + refreshToken;
            if (typeof tenantKey !== "undefined" && tenantKey !== "") url += "&tenantKey=" + tenantKey;
            if (typeof businessKey !== "undefined" && businessKey !== "") url += "&businessKey=" + businessKey;
            if (typeof locationKey !== "undefined" && locationKey !== "") url += "&locationKey=" + locationKey;

            var xhr = new XMLHttpRequest();
            xhr.open("GET", url);
            xhr.onload = function () {
                if (xhr.status === 200 && xhr.responseText !== "") {
                    var json = JSON.parse(xhr.responseText);
                    accessToken = json.accessToken.accessToken;
                    accessTokenExpiry = json.accessToken.expiry;
                    refreshToken = json.refreshToken.accessToken;
                }
                callback();
            };
            xhr.send();
        }

        function tsLoadReviews(target, tenantKey, businessKey, locationKey, tag, options) {
            tsRefreshAccessToken(tenantKey, businessKey, locationKey, () => {
                var xhr = new XMLHttpRequest();
                var currentPage = tsGetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, "currentPage");
                var pageSize = tsGetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, "pageSize");
                var url = tsBuildUrl(widgetUrl, currentPage, pageSize, tenantKey, businessKey, locationKey, tag, options);
                xhr.open("GET", url);
                xhr.onload = function () {
                    if (xhr.status === 200 && xhr.responseText !== "") {
                        // update local count
                        var reviews = JSON.parse(xhr.responseText);
                        tsAddToActiveWidgetValue(tenantKey, businessKey, locationKey, tag, "currentReviewCount", reviews.length);

                        // draw the reviews
                        tsDrawReviews(target, reviews, tenantKey, businessKey, locationKey, tag, options);
                    } else {
                    }
                };
                xhr.send();
            });
        }

        function tsBuildUrl(widgetUrl, currentPage, pageSize, tenantKey, businessKey, locationKey, tag, options) {
            var url = widgetUrl + "/reviewlistdata?v=1&accessToken=" + accessToken + "&pageNum=" + currentPage + "&pageSize=" + pageSize;
            if (typeof tenantKey !== "undefined" && tenantKey !== "") url += "&tenantKey=" + tenantKey;
            if (typeof businessKey !== "undefined" && businessKey !== "") url += "&businessKey=" + businessKey;
            if (typeof locationKey !== "undefined" && locationKey !== "") url += "&locationKey=" + locationKey;
            if (typeof tag !== "undefined" && tag !== "") url += "&tag=" + tag;
            if (options.ratingsAbove > 0) url += "&ratingFrom=" + options.ratingsAbove;
            if (options.exclude > '') url += "&exclude=" + options.exclude;
            if (options.displayFullName) url += "&displayFullName=true";
            if (options.displayAdditionalData) url += "&includeAdditionalData=true";
            return url;
        }

        function tsBuildSummaryUrl(widgetUrl, tkey, bkey, lkey, tagkey) {
            var url = widgetUrl + "/reviewsummary?";
            if (typeof tkey !== "undefined" && tkey !== "") url += "&tenantKey=" + tkey;
            if (typeof bkey !== "undefined" && bkey !== "") url += "&businessKey=" + bkey;
            if (typeof lkey !== "undefined" && lkey !== "") url += "&locationKey=" + lkey;
            if (typeof tagkey !== "undefined" && tagkey !== "") url += "&tag=" + tagkey;
            return url;
        }

        function tsDrawReviews(target, reviews, tenantKey, businessKey, locationKey, tag, options) {
            var reviewContent = "";
            var totalReviews = tsGetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, "totalReviewCount");
            var currentReviews = tsGetActiveWidgetValue(tenantKey, businessKey, locationKey, tag, "currentReviewCount");
            var btnSubmit;

            reviews.forEach(function (review) {
                reviewContent += tsRenderReview(review, options)
                    .replace(new RegExp("{{font-family}}", "g"), options.fontFamily)
                    .replace(new RegExp("{{color}}", "g"), options.color);
            });

            // add the reviews to the page but retain the comment for additional reviews to be added later
            target.innerHTML = target.innerHTML.replace("<!--reviewListContent-->", reviewContent + "<!--reviewListContent-->");

            if (currentReviews < totalReviews) {
                if (target.innerHTML.indexOf("<!--paginator-->") > 0) {
                    // add the paginator if it doesn't already exist
                        target.innerHTML = target.innerHTML.replace("<!--paginator-->", paginator);

                        // now hook up to the event
                        btnSubmit = target.querySelector("#tsLoadMore");
                        btnSubmit.setAttribute("ts-location", locationKey);
                        btnSubmit.setAttribute("ts-business", businessKey);
                        btnSubmit.setAttribute("ts-tenant", tenantKey);
                        btnSubmit.setAttribute("ts-tag", tag);
                        btnSubmit.addEventListener("click", tsLoadMore);
                    } else {
                    // still more reviews to show so reenable the show more button
                        btnSubmit = target.querySelector("#tsLoadMore");
                        btnSubmit.addEventListener("click", tsLoadMore); // reconnect the disconnected event listener
                        btnSubmit.disabled = false;
                    }
            } else {
                // shown all the reviews, remove the button
                btnSubmit = target.querySelector("#tsLoadMore");

                if (btnSubmit) {
                    btnSubmit.style.setProperty("display", "none", "important");
                }
            }
        }

        function tsLoadMore(evnt) {
            // scoped to the button
            evnt.preventDefault();
            this.disabled = true;
            var tenant = this.getAttribute("ts-tenant");
            var business = this.getAttribute("ts-business");
            var location = this.getAttribute("ts-location");
            var tag = this.getAttribute("ts-tag");
            var target = this.closest("[ts-reviewlistwidget],div.ts-reviewListWidget");
            var options = tsReadAttributes(target);
            tsAddToActiveWidgetValue(tenant, business, location, tag, "currentPage", 1);
            tsLoadReviews(target, tenant, business, location, tag, options);
        }

        function tsRenderReview(review, options) {
            var months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
            var d = new Date(review.datePublished);
            var curr_date = d.getDate();
            var curr_month = d.getMonth(); //Months are zero based
            var curr_year = d.getFullYear();
            var dateString = curr_date + " " + months[curr_month] + " " + curr_year;
            var reviewContent = review.reviewBody || "";
            var reviewBy = "Customer Review";
            var reviewDate = "";
            var reviewReply = "";
            var truncateLength = Number(options.truncateLength);
            var reviewId = review.datePublished.replace(new RegExp(":", "g"), "-");
            var starRating = (review.reviewRating.ratingValue / 2).toFixed(0);

            if (isNaN(truncateLength) === false && truncateLength > 0 && reviewContent.length > truncateLength) {
                reviewContent = reviewContent.substr(0, truncateLength) +
                    '<button type="button" class="ts-read-more" onclick="document.getElementById(\'ts-reviewText-' + reviewId +
                    '\').setAttribute(\'style\', \'display: contents !important\'); this.setAttribute(\'style\', \'display: none !important\');">... read more</button>' +
                    '<span id="ts-reviewText-' + reviewId + '" style="display: none !important;">' +
                    reviewContent.substr(truncateLength, reviewContent.length - truncateLength) + '</span>';
            }

            if (options.showLocation) {
                reviewBy += " for " + review.subject;
            }

            if (options.suppressReviewNames !== "true") {
                reviewBy += " by " + review.author.name;
            }

            if (options.suppressReviewNames !== "true" && options.suppressReviewDates !== "true") {
                reviewDate = " left on " + dateString;
            }

            var reviewLine1 = options.suppressTitle === "false" ? reviewBy + reviewDate : "";

            if (review.reply && review.reply !== "") {
                var replyText = "Reply";

                if (options.suppressReviewDates !== "true") {
                    var replyDate = new Date(review.replyDate);
                    var replyDateString = replyDate.getDate() + " " + months[replyDate.getMonth()] + " " + replyDate.getFullYear();
                    replyText += " left " + replyDateString;
                }

                reviewReply = '<span class="ts-reviewReply">' + replyText + ':&nbsp;&nbsp;' + review.reply + '</span>';
            }

            var verified = '';
            if (options.suppressVerified === "false" && review["@type"].toUpperCase() === "9A9B0D66-E568-474D-939B-F1859A3769D9") { // review.verified &&
                verified = '&nbsp;&nbsp;<img class="ts-verified" src="https://widgetassets.trustist.com/img/verified.png" alt="Verified review"> <span class="ts-verified" style="font-family: {{font-family}} !important; color: {{color}} !important;">Verified Review</span>';
            }

            var reply = '';
            var content = '';
            var answers = '';

            if (options.displayAdditionalData && review.answers) {
                for (i = 0; i < review.answers.length; i++) {
                    answers += '<div class="ts-reviewSubtitle" style="font-family: {{font-family}} !important;">' + review.answers[i].answer + '</div>';
                }
            }

            if (options.suppressReplies === false) {
                reply = '<div class="ts-reviewReply" style="font-family: {{font-family}} !important; color: {{color}} !important;">' + reviewReply + '</div>';
            }

            if (options.suppressReviewLinks === "true" || options.suppressReviewLinks === "all" || options.suppressReviewLinks.toUpperCase().indexOf(review["@type"].toUpperCase()) > 1) {
                if (reviewLine1 !== "") {
                    reviewLine1 = '<div class="ts-reviewTitle" style="font-family: {{font-family}} !important; color: {{color}} !important;">' + reviewLine1 + "<br /></div>";
                }

                content = '<div class="ts-reviewContainer"><div class="ts-reviewLogo">' +
                    '<img src="' + review["image"] + '" alt="Review source logo" style="margin-right: 20px !important;"></div>' +
                    '<div class="ts-reviewContent">' + reviewLine1 + answers;

                if (options.suppressStars === "false") content +=
                    '<span class="ts-stars" aria-label="Rated ' + starRating + ' out of 5"><div style="width:' + (65 * review.reviewRating.ratingValue / 10).toFixed(0) + 'px !important; overflow: hidden !important;"><span></span></div></span>' + verified;

                content += '<div class="ts-reviewText" style="font-family: {{font-family}} !important; color: {{color}} !important;">' + reviewContent + '</div>' + reply + '</div></div>';
            }
            else {
                if (reviewLine1 !== "") {
                    reviewLine1 = '<div class="ts-reviewTitle" style="font-family: {{font-family}} !important; color: {{color}} !important;">' +
                        '<a href="' + review.isBasedOn + '" target="' + options.linkTarget + '" rel="noopener">' + reviewLine1 + "</a><br /></div>";
                }

                content = '<div class="ts-reviewContainer"><div class="ts-reviewLogo">' +
                    '<a href="' + review.isBasedOn + '" target="' + options.linkTarget + '" rel="noopener" aria-label="View original review">' +
                    '<img src="' + review["image"] + '" alt="Review source logo" style="margin-right: 20px !important;">' +
                    '</a></div><div class="ts-reviewContent">' + reviewLine1 + answers;

                if (options.suppressStars === "false") content +=
                    '<a class="ts-verified" href="' + review.isBasedOn + '" target="' + options.linkTarget + '" rel="noopener" aria-label="View original review - Rated ' + starRating + ' out of 5">' +
                    '<span class="ts-stars" aria-label="Rated ' + starRating + ' out of 5"><div style="width:' + (65 * review.reviewRating.ratingValue / 10).toFixed(0) + 'px !important; overflow: hidden !important;"><span></span></div></span></a>' + verified;

                content += '<div class="ts-reviewText" style="font-family: {{font-family}} !important; color: {{color}} !important;">' + reviewContent + '</div>' + reply + '</div></div>';
            }

            return content;
        }

        function tsReadAttributes(target) {
            return {
                locationKey: target.getAttribute("ts-location"),
                businessKey: target.getAttribute("ts-business"),
                tag: target.getAttribute("ts-tag"),
                fontFamily: target.getAttribute("ts-font-family") || "'Roboto', sans-serif",
                color: target.getAttribute("ts-color") || "#5a6a74",
                pageSize: target.getAttribute("ts-page-size") || 20,
                suppressStars: target.getAttribute("ts-suppress-stars") || "false",
                suppressReplies: target.getAttribute("ts-suppress-replies") || false,
                suppressSummary: target.getAttribute("ts-suppress-summary") || false,
                suppressReviewLinks: target.getAttribute("ts-suppress-review-links") || "none",
                suppressReviewDates: target.getAttribute("ts-suppress-review-dates") || false,
                suppressReviewNames: target.getAttribute("ts-suppress-review-names") || false,
                suppressTitle: target.getAttribute("ts-suppress-title") || "false",
                suppressVerified: target.getAttribute("ts-suppress-verified") || "false",
                linkTarget: target.getAttribute("ts-link-target") || "_self",
                showLocation: target.getAttribute('ts-show-location') === "true",
                ratingsAbove: parseInt(target.getAttribute("ts-ratings-above")) || 0,
                truncateLength: target.getAttribute("ts-truncate-length") || "0",
                exclude: target.getAttribute("ts-exclude") || "",
                displayFullName: target.getAttribute("ts-display-full-name") || null,
                displayAdditionalData: target.getAttribute("ts-display-additional-data") || null,
            };
        }

        function tsAddCssTag(url) {
            var includedAlready = tsCheckIfIncluded(url);
            var head = d.getElementsByTagName("head")[0];

            if (!includedAlready) {
                var tag = d.createElement("link");
                tag.rel = "stylesheet";
                tag.type = "text/css";
                tag.href = url;
                head.appendChild(tag);
            }
        }

        function tsCheckIfIncluded(file) {
            var links = d.getElementsByTagName("link");
            for (var i = 0; i < links.length; i++) {
                if (links[i].href?.substr(-file.length) === file) {
                    return true;
                }
            }

            var scripts = d.getElementsByTagName("script");
            for (var j = 0; j < scripts.length; j++) {
                if (scripts[j].src?.substr(-file.length) === file) {
                    return true;
                }
            }

            return false;
        }

    })(window, document);