(function() {
    // Use query param as search query
    var searchQuery = decodeURIComponent(window.location.href.split("?q=")[1]);

    // Initialize the search index
    var lunrIndex = lunr(function () {
        this.ref('url');
        this.field('title', {boost: 10});
        this.field('content');
    });


    // Add content from search blob to index
    function addContentToIndex() {
        for (var page in search_blob) {
            lunrIndex.add({
                url: page,
                title: search_blob[page].title,
                content: search_blob[page].content
            });
        }
    }

    function displaySearchHeading(query) {
        var heading = document.getElementById("searchHeading");
        heading.innerHTML = "Search results for: " + query;
    }

    // Get the raw search results
    function getRawSearchResults(query) {
        return lunrIndex.search(query);
    }

    // Try to find the end of a word on which to end the blurb
    function getResultBlurb(result_content) {
        var rangeForEndOfWord = result_content.substr(250, 275),
            endOfWordIndex = rangeForEndOfWord.indexOf(" ");

        return result_content.substr(0, 250 + endOfWordIndex);
    }

    function displaySearchResults(results) {
        var container = document.getElementById("searchResultsContainer"),
            ref, title;

        // Clear the loading text before inserting the results
        container.innerHTML = "";

        if (results.length) {
            for (var result in results) {
                ref = results[result].ref;

                if (ref !== "") {
                    // Some pages might not have a title set
                    title = search_blob[ref].title || '(No title)';
                    container.innerHTML += "<a href='" + ref + "'>" + title + "</a>";
                    container.innerHTML += "<p>" + getResultBlurb(search_blob[ref].content) + "...</p><br />";
                }
            }
        } else {
            container.innerHTML += "<div class='search-result'>No results found.</div>";
        }
    }

    addContentToIndex();
    window.addEventListener("load", function () {
        displaySearchHeading(searchQuery);
        displaySearchResults(getRawSearchResults(searchQuery));
    });

})();