/*
 * AUSU jQuery-Ajax Auto Suggest
 * http://www.oslund.ca/
 *
 * @version
 * 1.0.1 (Jan 28 2011)
 *
 * @copyright
 * Copyright (C) 2011 Isaac Oslund
 * Dual licensed under the MIT and GPL licenses.
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.opensource.org/licenses/gpl-license.php
 */

(function($) {
    $.fn.autosugguest = function(config) {

        var defaults = {
            className: 'suggest',
            methodType: 'POST',
            addParams: null,
            rtnIDs: false,
            dataFile: 'data.php',
            minChars:  4,
            fadeTime:  100,
            ignoreClass: 'ignoreListElement'
        };

        var config = $.extend(defaults, config);

        config.addParams = (config.addParams != '') ? '&' + config.addParams : '';

        $('<div class="ausu-suggestionsBox"><ul></ul></div>').appendTo('.' + config.className);
        $(".ausu-suggestionsBox > ul li").not('.' + config.ignoreClass).live('mouseover', function() {
            if ($(this).hasClass(config.ignoreClass)) return true;
            var sel = $(this).parent().find("li[class='selected']").removeClass('selected');
            $(this).addClass('selected');
        });

        $("." + config.className + " > input").keyup(function(event) {
            var fieldParent = $(this).parents('div.' + config.className);

            if (event.which != 39 && event.which != 37 && event.which != 38 && event.which != 40 && event.which != 13 && event.which != 9) {

                fieldVal = fieldParent.find('input:eq(0)').val();
                suggest(fieldVal, this.id);
            } else {

                var fieldChild = fieldParent.find('.ausu-suggestionsBox > ul');

                switch (event.which) {
                    case 40:
                    {
                        keyEvent(fieldChild, 'next');
                        break;
                    }
                    case 38:
                    {
                        keyEvent(fieldChild, 'prev');
                        break;
                    }
                    case 13:
                    {
                        var txtInput = fieldParent.children('input:eq(0)');
                        //txtInput.addClass('ausu-load');
                        if (config.rtnIDs == true) fieldParent.children('input:eq(1)').val($("li[class='selected']").attr("id"));
                        fieldParent.children('div.ausu-suggestionsBox').hide();
                        return false;
                        break;
                    }
                    case 9:
                    {
                        offFocus(this);
                        $("li").removeClass("selected");
                        break;
                    }
                }
            }
        });

        $("." + config.className).bind("keypress", function(event) {
            if (event.keyCode == 13) {
                var href = $('.ausu-suggestionsBox ul li.selected a').attr('href');
                var onClick = $('.ausu-suggestionsBox ul li.selected a').attr('onclick');
                if ($('.ausu-suggestionsBox ul li.selected a').hasClass('moreLink')) {
                    $('.ausu-suggestionsBox ul li.selected a').click();
                    return false;
                }
                if (!href && !onClick) {
                    return true;
                } else {
                    if (typeof href != 'undefined' && href != '#') {
                        window.location.href = href;
                    } else if (typeof onClick != 'undefined') {
                        $('.ausu-suggestionsBox ul li.selected a').click();
                    }
                    return false;
                }
            }
        });

        $("." + config.className + " > input").live("blur", function() {
            offFocus(this);
            $("li").removeClass("selected");
        });

        function suggest(dataInput, id) {
            if (dataInput.length < config.minChars) {
                $('#' + id).parent('.' + config.className).children('div.ausu-suggestionsBox').fadeOut();
            } else {
                $('#' + id + ":eq(0)").addClass('ausu-load');
                $.ajax({
                    type: config.methodType,
                    url: config.dataFile,
                    dataType: "html",
                    data: "data=" + dataInput + "&id=" + id + config.addParams,
                    success: function(data) {
                        if (data.length > 0) {
                            $('#' + id).parent('div.' + config.className).children('div.ausu-suggestionsBox').fadeIn();
                            $('#' + id).parent('div.' + config.className).find('.ausu-suggestionsBox > ul').html(data);
                        }
                        $('#' + id + ":eq(0)").removeClass('ausu-load');
                    }
                });
            }
        }

        function keyEvent(fieldChild, action) {
            yx = 0;
            fieldChild.find("li").each(function() {
                if ($(this).attr("class") == "selected")
                    yx = 1;
            });

            if (yx == 1) {
                var sel = fieldChild.find("li[class='selected']");
                sel.removeClass("selected");
                if (action == 'next') {
                    var nextElement = sel.next();
                    while (nextElement.hasClass(config.ignoreClass)) {
                        nextElement = nextElement.next();
                    }
                    nextElement.addClass("selected");
                } else {
                    var prevElement = sel.prev();
                    while (prevElement.hasClass(config.ignoreClass)) {
                        prevElement = prevElement.prev();
                    }
                    prevElement.addClass("selected");
                }
            }
            else {
                if (action == 'next') {
                    var firstElement = fieldChild.find("li:first");
                    while (firstElement.hasClass(config.ignoreClass)) {
                        firstElement = firstElement.next();
                    }
                    firstElement.addClass("selected");
                } else {
                    var lastElement = fieldChild.find("li:last")
                    while (lastElement.hasClass(config.ignoreClass)) {
                        lastElement = lastElement.prev();
                    }
                    lastElement.addClass("selected");
                }
            }
        }

        function offFocus(fieldChild) {
            var fieldParent = $(fieldChild).parents('div.' + config.className);
            fieldParent.children('div.ausu-suggestionsBox').delay(config.fadeTime).fadeOut();
        }

        $(".ausu-suggestionsBox > ul li").live("click", function() {
            var fieldParent = $(this).parents('div.' + config.className);
            if ($(this).hasClass(config.ignoreClass)) return false;
//            fieldParent.children('input:eq(0)').val($(this).text());
            if (config.rtnIDs == true) fieldParent.children('input:eq(1)').val($(this).attr("id"));
            fieldParent.children('div.ausu-suggestionsBox').hide();
        });

    };
})(jQuery);