// Get Parameters from some url
var getUrlParameter = function getUrlParameter(sPageURL) {
    var url = sPageURL.split('?');
    var obj = {};
    if (url.length == 2) {
        var sURLVariables = url[1].split('&'),
            sParameterName,
            i;
        for (i = 0; i < sURLVariables.length; i++) {
            sParameterName = sURLVariables[i].split('=');
            obj[sParameterName[0]] = sParameterName[1];
        }
        return obj;
    } else {
        return undefined;
    }
};

jQuery(document).ready(function () {

    // Execute actions on images generated from Markdown pages
    var images = $("article img").not(".inline");
    // Wrap image inside a featherlight (to get a full size view in a popup)
    images.wrap(function () {
        var image = $(this);
        if (!image.parent("a").length) {
            return "<a href='" + image[0].src + "' data-featherlight='image'></a>";
        }
    });

    // Change styles, depending on parameters set to the image
    images.each(function (index) {
        var image = $(this);
        var o = getUrlParameter(image[0].src);
        if (typeof o !== "undefined") {
            var h = o["height"];
            var w = o["width"];
            var c = o["classes"];
            image.css({
                width: function () {
                    if (typeof w !== "undefined") {
                        return w;
                    }
                },
                height: function () {
                    if (typeof h !== "undefined") {
                        return h;
                    }
                }
            });
            if (typeof c !== "undefined") {
                var classes = c.split(',');
                $.each(classes, function(i) {
                    image.addClass(classes[i]);
                });
            }
        }
    });

    // Add link button for every
    var text, clip = new Clipboard('.anchor');
    $("h1~h2,h1~h3,h1~h4,h1~h5,h1~h6").append(function (index, html) {
        var element = $(this);
        var url = document.location.origin + document.location.pathname;
        var link = url + "#" + element[0].id;
        return " <span class='anchor' data-clipboard-text='" + link + "'>" +
            "<i class='fa fa-link fa-lg'></i>" +
            "</span>";
    });

    $(".anchor").on('mouseleave', function (e) {
        $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
    });

    clip.on('success', function (e) {
        e.clearSelection();
        $(e.trigger).attr('aria-label', 'Link copied to clipboard!').addClass('tooltipped tooltipped-s');
    });

});



function fallbackMessage(action) {
    var actionMsg = '';
    var actionKey = (action === 'cut' ? 'X' : 'C');

    if (/iPhone|iPad/i.test(navigator.userAgent)) {
        actionMsg = 'No support :(';
    }
    else if (/Mac/i.test(navigator.userAgent)) {
        actionMsg = 'Press ⌘-' + actionKey + ' to ' + action;
    }
    else {
        actionMsg = 'Press Ctrl-' + actionKey + ' to ' + action;
    }

    return actionMsg;
}

jQuery(document).ready(function() {
    jQuery('#sidebar .category-icon').on('click', function() {
        $( this ).toggleClass("fa-angle-down fa-angle-right") ;
        $( this ).parent().parent().children('ul').toggle() ;
        return false;
    });


    jQuery('[data-clear-history-toggle]').on('click', function() {
        sessionStorage.clear();
        location.reload();
        return false;
    });

    var ajax;
    jQuery('[data-search-input]').on('input', function() {
        var input = jQuery(this),
            value = input.val(),
            items = jQuery('[data-nav-id]');
        items.removeClass('search-match');
        if (!value.length) {
            $('ul.topics').removeClass('searched');
            items.css('display', 'block');
            sessionStorage.removeItem('search-value');
            $(".highlightable").unhighlight({ element: 'mark' })
            return;
        }

        sessionStorage.setItem('search-value', value);
        $(".highlightable").unhighlight({ element: 'mark' }).highlight(value, { element: 'mark' });

        if (ajax && ajax.abort) ajax.abort();

        jQuery('[data-search-clear]').on('click', function() {
            jQuery('[data-search-input]').val('').trigger('input');
            sessionStorage.removeItem('search-input');
            $(".highlightable").unhighlight({ element: 'mark' })
        });
    });

    $.expr[":"].contains = $.expr.createPseudo(function(arg) {
        return function( elem ) {
            return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
        };
    });

    if (sessionStorage.getItem('search-value')) {
        var searchValue = sessionStorage.getItem('search-value')
        sessionStorage.removeItem('search-value');
        var searchedElem = $('article').find(':contains(' + searchValue + ')').get(0);
        searchedElem && searchedElem.scrollIntoView();
        $(".highlightable").highlight(searchValue, { element: 'mark' });
    }

    // clipboard
    var clipInit = false;
    $('code').each(function() {
        var code = $(this),
            text = code.text();

        if (text.length > 5) {
            if (!clipInit) {
                var text, clip = new Clipboard('.copy-to-clipboard', {
                    text: function(trigger) {
                        text = $(trigger).prev('code').text();
                        return text.replace(/^\$\s/gm, '');
                    }
                });

                var inPre;
                clip.on('success', function(e) {
                    e.clearSelection();
                    inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
                    $(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
                });

                clip.on('error', function(e) {
                    inPre = $(e.trigger).parent().prop('tagName') == 'PRE';
                    $(e.trigger).attr('aria-label', fallbackMessage(e.action)).addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
                    $(document).one('copy', function(){
                        $(e.trigger).attr('aria-label', 'Copied to clipboard!').addClass('tooltipped tooltipped-' + (inPre ? 'w' : 's'));
                    });
                });

                clipInit = true;
            }

            code.after('<span class="copy-to-clipboard" title="Copy to clipboard"><object class="clippy-icon" type="image/svg+xml" data="' + baseurl + '/images/clippy.svg"/></span>');
            code.next('.copy-to-clipboard').on('mouseleave', function() {
                $(this).attr('aria-label', null).removeClass('tooltipped tooltipped-s tooltipped-w');
            });
        }
    });

    // allow keyboard control for prev/next links
    jQuery(function() {
        jQuery('.nav-prev').click(function(){
            location.href = jQuery(this).attr('href');
        });
        jQuery('.nav-next').click(function() {
            location.href = jQuery(this).attr('href');
        });
    });

    jQuery(document).keydown(function(e) {
      // prev links - left arrow key
      if(e.which == '37') {
        jQuery('.nav.nav-prev').click();
      }

      // next links - right arrow key
      if(e.which == '39') {
        jQuery('.nav.nav-next').click();
      }
    });

    $('#top-bar a:not(:has(img)):not(.btn)').addClass('highlight');
    $('article a:not(:has(img)):not(.btn)').addClass('highlight');
});

jQuery(window).on('load', function() {
    // store this page in session
    sessionStorage.setItem(jQuery('body').data('url'), 1);

    // loop through the sessionStorage and see if something should be marked as visited
    for (var url in sessionStorage) {
        if (sessionStorage.getItem(url) == 1) jQuery('[data-nav-id="' + url + '"]').addClass('visited');
    }
});

$(function() {
    $('a[rel="lightbox"]').featherlight({
        root: 'section#body'
    });
});

jQuery.extend({
    highlight: function(node, re, nodeName, className) {
        if (node.nodeType === 3) {
            var match = node.data.match(re);
            if (match && !(node.parentNode.ownerSVGElement instanceof SVGElement)) {
                var highlight = document.createElement(nodeName || 'span');
                highlight.className = className || 'highlight';
                var wordNode = node.splitText(match.index);
                wordNode.splitText(match[0].length);
                var wordClone = wordNode.cloneNode(true);
                highlight.appendChild(wordClone);
                wordNode.parentNode.replaceChild(highlight, wordNode);
                return 1; //skip added node in parent
            }
        } else if ((node.nodeType === 1 && node.childNodes) && // only element nodes that have children
            !/(script|style)/i.test(node.tagName) && // ignore script and style nodes
            !(node.tagName === nodeName.toUpperCase() && node.className === className)) { // skip if already highlighted
            for (var i = 0; i < node.childNodes.length; i++) {
                i += jQuery.highlight(node.childNodes[i], re, nodeName, className);
            }
        }
        return 0;
    }
});

jQuery.fn.unhighlight = function(options) {
    var settings = {
        className: 'highlight',
        element: 'span'
    };
    jQuery.extend(settings, options);

    return this.find(settings.element + "." + settings.className).each(function() {
        var parent = this.parentNode;
        parent.replaceChild(this.firstChild, this);
        parent.normalize();
    }).end();
};

jQuery.fn.highlight = function(words, options) {
    var settings = {
        className: 'highlight',
        element: 'span',
        caseSensitive: false,
        wordsOnly: false
    };
    jQuery.extend(settings, options);

    if (!words) { return; }

    if (words.constructor === String) {
        words = [words];
    }
    words = jQuery.grep(words, function(word, i) {
        return word != '';
    });
    words = jQuery.map(words, function(word, i) {
        return word.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
    });
    if (words.length == 0) { return this; }
    ;

    var flag = settings.caseSensitive ? "" : "i";
    var pattern = "(" + words.join("|") + ")";
    if (settings.wordsOnly) {
        pattern = "\\b" + pattern + "\\b";
    }
    var re = new RegExp(pattern, flag);

    return this.each(function() {
        jQuery.highlight(this, re, settings.element, settings.className);
    });
};