;(function($) {
  $.fn.quicksearch = function(options) {

    options = jQuery.extend({
      position: 'prepend',
      attached: 'body',
      formId: 'quicksearch',
      labelText: 'Quick Search',
      labelClass: 'qs_label',
      inputText: null,
      inputClass: 'qs_input',
      loaderId: 'loader',
      loaderClass: 'loader',
      loaderImg: null,
      loaderText: 'Loading...',
      stripeRowClass: null,
      hideElement: null,
      delay: 500,
      focusOnLoad: false,
      onBefore: null,
      onAfter: null,
      filter: null,
      randomElement: 'qs' + Math.floor(Math.random() * 1000000)
    }, options);

    var timeout;
    var cache;
    var score = {};
    var el = this;
    var stripeRowLength = (!is_empty(options.stripeRowClass)) ? options.stripeRowClass.length : 0;
    var doStripe = (stripeRowLength > 0) ? true : false;

    function is_empty(i) {
      return (i == null || i == undefined || i == false) ? true : false;
    }

    function get_cache(el) {
      cache = $(el).not('.' + options.noResultsClass).map(function() {
        return strip_html(normalise(this.innerHTML));
      });
    }

    function normalise(i) {
      return $.trim(i.toLowerCase().replace(/\n/, '').replace(/\s{2,}/, ' '));
    }

    function get_key() {
      var input = strip_html(normalise($('input[rel="' + options.randomElement + '"]').val()));

      if (typeof options.filter == "function") { input = options.filter(input); }

      if (input.indexOf(' ') == -1) {
        return input;
      }
      else {
        return input.split(" ");
      }
    }

    function test_key(k, value, type) {
      if (type == "string") {
        return test_key_string(k, value);
      }
      else {
        return test_key_arr(k, value);
      }
    }

    function test_key_string(k, value) {
      return (value.indexOf(k) > -1);
    }

    function test_key_arr(k, value) {
      for (var i = 0; i < k.length; i++) {
        var test = value.indexOf(k[i]);
        if (test == -1) {
          return false;
        }
      }
      return true;
    }

    function strip_html(input) {
      var regexp = new RegExp(/\<[^\<]+\>/g);
      var output = input.replace(regexp, "");
      output = output.toLowerCase();
      return output;
    }

    function select_element(el) {
      if (options.hideElement == "grandparent") {
        return $(el).parent().parent();
      }
      else if (options.hideElement == "parent") {
        return $(el).parent();
      }
      else {
        return $(el);
      }
    }

    function stripe(el) {
      if (doStripe) {
        var i = 0;
        select_element(el).filter(':visible').each(function() {

          for (var j = 0; j < stripeRowLength; j++) {
            if (i == j) {
              $(this).addClass(options.stripeRowClass[i]);

            }
            else {
              $(this).removeClass(options.stripeRowClass[j]);
            }
          }
          i = (i + 1) % stripeRowLength;
        });
      }
    }

    function loader(o) {
      if (options.loaderId) {
        var l = $('input[rel="' + options.randomElement + '"]').parent().find('.loader');
        if (o == 'hide') {
          l.hide();
        }
        else {
          l.show();
        }
      }
    }

    function place_form() {
      var formPosition = options.position;
      var formAttached = options.attached;

      if (formPosition == 'before') {
        $(formAttached).before(make_form());
      } else if (formPosition == 'prepend') {
        $(formAttached).prepend(make_form());
      } else if (formPosition == 'append') {
        $(formAttached).append(make_form());
      } else {
        $(formAttached).after(make_form());
      }
    }

    function make_form() {
      return '<div ' + 'id="' + options.formId + '" ' + 'class="quicksearch">' +
						make_form_label() + make_form_input() + make_form_loader() +
					'</div>';
    }

    function make_form_label() {
      if (!is_empty(options.labelText)) {
        return '<label for="' + options.randomElement + '" ' +
							'class="' + options.labelClass + '">'
							+ options.labelText
							+ '</label> ';
      }
      return '';
    }

    function make_form_input() {
      var val = (!is_empty(options.inputText)) ? options.inputText : ""
      return '<input type="text" value="' + val + '" rel="' + options.randomElement + '" class="' + options.inputClass + '" id="' + options.randomElement + '" /> ';
    }

    function make_form_loader() {
      if (!is_empty(options.loaderImg)) {
        return '<img src="' + options.loaderImg + '" alt="Loading" id="' + options.loaderId + '" class="' + options.loaderClass + '" />';
      } else {
        return '<span id="' + options.loaderId + '" class="' + options.loaderClass + '">' + options.loaderText + '</span>';
      }
    }

    function focus_on_load() {
      $('input[rel="' + options.randomElement + '"]').get(0).focus();
    }

    function toggle_text() {
      $('input[rel="' + options.randomElement + '"]').focus(function() {
        if ($(this).val() == options.inputText) {
          $(this).val('');
        }
      }),
			$('input[rel="' + options.randomElement + '"]').blur(function() {
			  if ($(this).val() == "") {
			    $(this).val(options.inputText);
			  }
			})
    };

    function init() {
      place_form();
      if (options.focusOnLoad) {
        focus_on_load();
      }
      if (options.inputText != "" && options.inputText != null) {
        toggle_text();
      }
      get_cache(el);
      stripe(el);
      loader('hide');
    }

    function qs() {
      clearTimeout(timeout);
      timeout = setTimeout(function() {

        if (typeof options.onBefore == "function") { options.onBefore(); }

        loader('show');

        setTimeout(function() {
          var k = get_key();
          var k_type = (typeof k);
          var i = 0;

          if (k != "") {
            if (typeof score[k] == "undefined") {
              score[k] = new Array();
              cache.each(function(i) {
                if (test_key(k, cache[i], k_type)) {
                  score[k][i] = true;
                }
              });
            }

            if (score[k].length == 0) {
              select_element(el).hide();
            }
            else {
              $(el).not('.' + options.noResultsClass).each(function(i) {
                if (score[k][i]) {
                  select_element(this).show();
                }
                else {
                  select_element(this).hide();
                }
              });

            }
          }
          else {
            select_element(el).show();
          }

          stripe(el);

        }, options.delay / 2);

        setTimeout(function() {

          loader('hide');

          if (typeof options.onAfter == "function") { options.onAfter(); }

        }, options.delay / 2);

      }, options.delay / 2);
    }

    init();

    $('input[rel="' + options.randomElement + '"]').keydown(function(e) {
      var keycode = e.keyCode;
      if (!(keycode == 9 || keycode == 13 || keycode == 16 || keycode == 17 || keycode == 18 || keycode == 38 || keycode == 40 || keycode == 224))
        qs();

      if (keycode == 13)
        e.preventDefault();
    });

    return this;
  }
})(jQuery);
