/*
  Dimension by HTML5 UP
  html5up.net | @ajlkn
  Free for personal and commercial use under the CCA 3.0 license (html5up.net/license)
*/

(function($) {

  skel.breakpoints({
    xlarge:   '(max-width: 1680px)',
    large:    '(max-width: 1280px)',
    medium:   '(max-width: 980px)',
    small:    '(max-width: 736px)',
    xsmall:   '(max-width: 480px)',
    xxsmall:  '(max-width: 360px)'
  });

  $(function() {

    var $window = $(window),
      $body = $('body'),
      $wrapper = $('#wrapper'),
      $header = $('#header'),
      $footer = $('#footer'),
      $languages = $('#languages'),
      $main = $('#main'),
      $main_articles = $main.children('article');

    // Disable animations/transitions until the page has loaded.
      $body.addClass('is-loading');

      $window.on('load', function() {
        window.setTimeout(function() {
          $body.removeClass('is-loading');
        }, 100);
      });

    // Fix: Placeholder polyfill.
      $('form').placeholder();

    // Fix: Flexbox min-height bug on IE.
      if (skel.vars.IEVersion < 12) {

        var flexboxFixTimeoutId;

        $window.on('resize.flexbox-fix', function() {

          clearTimeout(flexboxFixTimeoutId);

          flexboxFixTimeoutId = setTimeout(function() {

            if ($wrapper.prop('scrollHeight') > $window.height())
              $wrapper.css('height', 'auto');
            else
              $wrapper.css('height', '100vh');

          }, 250);

        }).triggerHandler('resize.flexbox-fix');

      }

    // Nav.
      var $nav = $header.children('nav'),
        $nav_li = $nav.find('li');

      // Add "middle" alignment classes if we're dealing with an even number of items.
        if ($nav_li.length % 2 == 0) {

          $nav.addClass('use-middle');
          $nav_li.eq( ($nav_li.length / 2) ).addClass('is-middle');

        }

    // Main.
      var delay = 325,
        locked = false;

      // Methods.
        $main._show = function(id, initial) {

          var $article = $main_articles.filter('#' + id);

          // No such article? Bail.
            if ($article.length == 0)
              return;

          // Handle lock.

            // Already locked? Speed through "show" steps w/o delays.
              if (locked || (typeof initial != 'undefined' && initial === true)) {

                // Mark as switching.
                  $body.addClass('is-switching');

                // Mark as visible.
                  $body.addClass('is-article-visible');

                // Deactivate all articles (just in case one's already active).
                  $main_articles.removeClass('active');

                // Hide header, footer, languages.
                  $header.hide();
                  $footer.hide();
                  $languages.hide();

                // Show main, article.
                  $main.show();
                  $article.show();

                // Activate article.
                  $article.addClass('active');

                // Unlock.
                  locked = false;

                // Unmark as switching.
                  setTimeout(function() {
                    $body.removeClass('is-switching');
                  }, (initial ? 1000 : 0));

                return;

              }

            // Lock.
              locked = true;

          // Article already visible? Just swap articles.
            if ($body.hasClass('is-article-visible')) {

              // Deactivate current article.
                var $currentArticle = $main_articles.filter('.active');

                $currentArticle.removeClass('active');

              // Show article.
                setTimeout(function() {

                  // Hide current article.
                    $currentArticle.hide();

                  // Show article.
                    $article.show();

                  // Activate article.
                    setTimeout(function() {

                      $article.addClass('active');

                      // Window stuff.
                        $window
                          .scrollTop(0)
                          .triggerHandler('resize.flexbox-fix');

                      // Unlock.
                        setTimeout(function() {
                          locked = false;
                        }, delay);

                    }, 25);

                }, delay);

            }

          // Otherwise, handle as normal.
            else {

              // Mark as visible.
                $body
                  .addClass('is-article-visible');

              // Show article.
                setTimeout(function() {

                  // Hide header, footer, languages.
                    $header.hide();
                    $footer.hide();
                    $languages.hide();

                  // Show main, article.
                    $main.show();
                    $article.show();

                  // Activate article.
                    setTimeout(function() {

                      $article.addClass('active');

                      // Window stuff.
                        $window
                          .scrollTop(0)
                          .triggerHandler('resize.flexbox-fix');

                      // Unlock.
                        setTimeout(function() {
                          locked = false;
                        }, delay);

                    }, 25);

                }, delay);

            }

        };

        $main._hide = function(addState) {

          var $article = $main_articles.filter('.active');

          // Article not visible? Bail.
            if (!$body.hasClass('is-article-visible'))
              return;

          // Add state?
            if (typeof addState != 'undefined'
            &&  addState === true)
              history.pushState(null, null, '#');

          // Handle lock.

            // Already locked? Speed through "hide" steps w/o delays.
              if (locked) {

                // Mark as switching.
                  $body.addClass('is-switching');

                // Deactivate article.
                  $article.removeClass('active');

                // Hide article, main.
                  $article.hide();
                  $main.hide();

                // Show footer, header.
                  $footer.show();
                  $header.show();
                  $languages.show();

                // Unmark as visible.
                  $body.removeClass('is-article-visible');

                // Unlock.
                  locked = false;

                // Unmark as switching.
                  $body.removeClass('is-switching');

                // Window stuff.
                  $window
                    .scrollTop(0)
                    .triggerHandler('resize.flexbox-fix');

                return;

              }

            // Lock.
              locked = true;

          // Deactivate article.
            $article.removeClass('active');

          // Hide article.
            setTimeout(function() {

              // Hide article, main.
                $article.hide();
                $main.hide();

              // Show footer, header.
                $footer.show();
                $header.show();
                $languages.show();

              // Unmark as visible.
                setTimeout(function() {

                  $body.removeClass('is-article-visible');

                  // Window stuff.
                    $window
                      .scrollTop(0)
                      .triggerHandler('resize.flexbox-fix');

                  // Unlock.
                    setTimeout(function() {
                      locked = false;
                    }, delay);

                }, 25);

            }, delay);


        };

      // Articles.
        $main_articles.each(function() {

          var $this = $(this);

          // Close.
            $('<div class="close">Close</div>')
              .appendTo($this)
              .on('click', function() {
                location.hash = '';
              });

          // Prevent clicks from inside article from bubbling.
            $this.on('click', function(event) {
              event.stopPropagation();
            });

        });

      // Events.
        $body.on('click', function(event) {

          // Article visible? Hide.
            if ($body.hasClass('is-article-visible'))
              $main._hide(true);

        });

        $window.on('keyup', function(event) {

          switch (event.keyCode) {

            case 27:

              // Article visible? Hide.
                if ($body.hasClass('is-article-visible'))
                  $main._hide(true);

              break;

            default:
              break;

          }

        });

        $window.on('hashchange', function(event) {

          // Empty hash?
            if (location.hash == ''
            ||  location.hash == '#') {

              // Prevent default.
                event.preventDefault();
                event.stopPropagation();

              // Hide.
                $main._hide();

            }

          // Otherwise, check for a matching article.
            else if ($main_articles.filter(location.hash).length > 0) {

              // Prevent default.
                event.preventDefault();
                event.stopPropagation();

              // Show article.
                $main._show(location.hash.substr(1));

            }

        });

      // Scroll restoration.
      // This prevents the page from scrolling back to the top on a hashchange.
        if ('scrollRestoration' in history)
          history.scrollRestoration = 'manual';
        else {

          var oldScrollPos = 0,
            scrollPos = 0,
            $htmlbody = $('html,body');

          $window
            .on('scroll', function() {

              oldScrollPos = scrollPos;
              scrollPos = $htmlbody.scrollTop();

            })
            .on('hashchange', function() {
              $window.scrollTop(oldScrollPos);
            });

        }

      // Initialize.

        // Hide main, articles.
          $main.hide();
          $main_articles.hide();

        // Initial article.
          if (location.hash != ''
          &&  location.hash != '#')
            $window.on('load', function() {
              $main._show(location.hash.substr(1), true);
            });

  });

})(jQuery);