(function () {

function displaySearchResults(results, store) {
    var searchResults = document.getElementById('search-results');

    if (results.length) { // Are there any results?
        var appendString = '';

        for (var i = 0; i < results.length; i++) {  // Iterate over the results
            var item = store[results[i].ref];
            appendString += '<li><a href="' + item.url + '"><h3>' + item.title + '</h3></a>';
            appendString += '<p>' + item.content.substring(0, 150) + '...</p></li>';
        }

        searchResults.innerHTML = appendString;
    } else {
        searchResults.innerHTML = '<li>No results found</li>';
    }
}

function getQueryVariable(variable) {
    var query = window.location.search.substring(1);
    var vars = query.split('&');

    for (var i = 0; i < vars.length; i++) {
        var pair = vars[i].split('=');

        if (pair[0] === variable) {
            return decodeURIComponent(pair[1].replace(/\+/g, '%20'));
        }
    }
}

var searchTerm = getQueryVariable('query');

if (searchTerm) {
    document.getElementById('search-box').setAttribute("value", searchTerm);

    // Initalize lunr with the fields it will be searching on. I've given title
    // a boost of 10 to indicate matches on this field are more important.
    var idx = lunr(function () {
        this.field('id');
        this.field('title', { boost: 10 });
        this.field('author');
        this.field('category');
        this.field('content');
    });

    for (var key in window.store) { // Add the data to lunr
        idx.add({
            'id': key,
            'title': window.store[key].title,
            'author': window.store[key].author,
            'category': window.store[key].category,
            'content': window.store[key].content
        });

        var results = idx.search(searchTerm); // Get lunr to perform a search
        displaySearchResults(results, window.store); // We'll write this in the next section
    }
}

})();