/**
 * From Hugo Learn theme, license MIT
 * https://themes.gohugo.io/hugo-theme-learn/
 */

var lunrIndex, pagesIndex;

function endsWith(str, suffix) {
    return str.indexOf(suffix, str.length - suffix.length) !== -1;
}

// Initialize lunrjs using our generated index file
function initLunr() {
    if (!endsWith(baseurl, "/")) {
        baseurl = baseurl + '/'
    };

    // First retrieve the index file
    $.getJSON(baseurl + "blog/index.json")
        .done(function (index) {
            pagesIndex = index;
            // Set up lunrjs by declaring the fields we use
            // Also provide their boost level for the ranking
            lunrIndex = lunr(function () {
                this.ref("link");
                this.field('title', {
                    boost: 15
                });
                this.field("summary", {
                    boost: 10
                });
                this.field("plain", {
                    boost: 5
                });

                this.pipeline.remove(lunr.stemmer);
                this.searchPipeline.remove(lunr.stemmer);

                // Feed lunr with each file and let lunr actually index them
                pagesIndex.forEach(function (page) {
                    this.add(page);
                }, this);
            })
        })
        .fail(function (jqxhr, textStatus, error) {
            var err = textStatus + ", " + error;
            console.error("Error getting Hugo index file:", err);
        });
}

/**
 * Trigger a search in lunr and transform the result
 *
 * @param  {String} query
 * @return {Array}  results
 */
function search(queryTerm) {
    // Find the item in our index corresponding to the lunr one to have more info
    return lunrIndex.search(queryTerm + "^100" + " " + queryTerm + "*^10" + " " + "*" + queryTerm + "^10" + " " + queryTerm + "~2^1").map(function (result) {
        return pagesIndex.filter(function (page) {
            return page.link === result.ref;
        })[0];
    });
}

// Let's get started
initLunr();
$(document).ready(function () {
    new autoComplete({
        /* selector for the search box element */
        selector: $("#search-by").get(0),
        /* source is the callback to perform the search */
        source: function (term, response) {
            response(search(term));
        },
        /* renderItem displays individual search results */
        renderItem: function (item, term) {
            console.log(item)
            var numContextWords = 2;
            var text = item.plain.match(
                "(?:\\s?(?:[\\w]+)\\s?){0," + numContextWords + "}" +
                term + "(?:\\s?(?:[\\w]+)\\s?){0," + numContextWords + "}");
            item.context = text;
            return '<div class="autocomplete-suggestion" ' +
                'data-term="' + term + '" ' +
                'data-title="' + item.title + '" ' +
                'data-uri="' + item.link + '" ' +
                'data-context="' + item.context + '">' +
                '» ' + item.title +
                '<div class="context">' +
                (item.context || '') + '</div>' +
                '</div>';
        },
        /* onSelect callback fires when a search suggestion is chosen */
        onSelect: function (e, term, item) {
            location.href = item.getAttribute('data-uri');
        }
    });
});