function getSnowplowDuid(cookieName) {
    cookieName = cookieName || '_sp_';
    var matcher = new RegExp(cookieName + 'id\\.[a-f0-9]+=([^;]+);?');
    var match = document.cookie.match(matcher);
    if (match && match[1]) {
        return match[1].split('.')[0];
    } else {
        return false;
    }
}

var Recommendations = {

    getRecommendations: function () {

        let snowplowDuid = getSnowplowDuid()
        const url = 'https://snowplow.woolford.io:7443/recommendations/' + snowplowDuid;

        let recommendations = document.getElementById("recommendations")
        let list = document.createElement("ul")

        fetch(url).then(response =>
            response.json().then(data => ({
                    data: data,
                    status: response.status
                })
            ).then(res => {
                // recommendations returned?
                if (res.status === 200 && res.data.length > 0) {

                    // append the recommendations to the list
                    res.data.forEach(recommendation => {

                        // don't append the current page to the list of recommendations
                        if (recommendation.pageTitle !== document.title){
                            let item = document.createElement("li")
                            const recommendationNode = document.createElement("a")
                            recommendationNode.text = recommendation.pageTitle
                            recommendationNode.href = recommendation.pageUrl
                            item.appendChild(recommendationNode)
                            list.appendChild(item)
                        }

                    })

                } else {
                    // If there are no recommendations, remove the recommendations section from the page
                    recommendations.remove()
                }

            }))

        recommendations.appendChild(list)

    }

}

document.addEventListener('DOMContentLoaded', Recommendations.getRecommendations);