/**
*    Json key/value autocomplete for jQuery 
*    Provides a transparent way to have key/value autocomplete
*    Copyright (C) 2008 Ziadin Givan www.CodeAssembly.com  
*
*    This program is free software: you can redistribute it and/or modify
*    it under the terms of the GNU Lesser General Public License as published by
*    the Free Software Foundation, either version 3 of the License, or
*    (at your option) any later version.
*
*    This program is distributed in the hope that it will be useful,
*    but WITHOUT ANY WARRANTY; without even the implied warranty of
*    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
*    GNU General Public License for more details.
*
*    You should have received a copy of the GNU Lesser General Public License
*    along with this program.  If not, see http://www.gnu.org/licenses/
*    
*    Examples 
*	 $("input#example").autocomplete("autocomplete.php");//using default parameters
*	 $("input#example").autocomplete("autocomplete.php",{minChars:3,timeout:3000,validSelection:false,parameters:{'myparam':'myvalue'},before : function(input,text) {},after : function(input,text) {}});
*    minChars = Minimum characters the input must have for the ajax request to be made
*	 timeOut = Number of miliseconds passed after user entered text to make the ajax request   
*    validSelection = If set to true then will invalidate (set to empty) the value field if the text is not selected (or modified) from the list of items.
*    parameters = Custom parameters to be passed
*    after, before = a function that will be caled before/after the ajax request
*/
jQuery.fn.autocomplete = function(url, input, button, settings) {
    return this.each(function()//do it for each matched element
    {
        //this is the original input
        var textInput = $(this);
        //create a new hidden input that will be used for holding the return value when posting the form, then swap names with the original input
        //textInput.after('<input type=text name="' + textInput.attr("name") + '"/>').attr("name", textInput.attr("name") + "_text").attr("id", "txt_search_name");
        var valueInput = $('input#' + input);
        var goButton = $('input#' + button);

        //create the ul that will hold the text and values
        valueInput.after('<ul class="autocomplete"></ul>');
        var list = valueInput.next().css({
            top: 32 /*textInput.offset().top + textInput.outerHeight()*/,
            left: 32 /*textInput.offset().left*/,
            width: 299 /*textInput.width()*/
        });
        var oldText = '';
        var typingTimeout;
        var size = 0;
        var selected = 0;

        settings = jQuery.extend(//provide default settings
		{
		minChars: 1,
		timeout: 500,
		after: null,
		before: null,
		validSelection: true,
		parameters: { 'inputName': valueInput.attr('name'), 'inputId': textInput.attr('id') }
}, settings);

        function getData(text) {
            window.clearInterval(typingTimeout);
            if (text != oldText && (settings.minChars != null && text.length >= settings.minChars)) {
                clear();
                if (settings.before == "function") {
                    settings.before(textInput, text);
                }
                //textInput.addClass('autocomplete-loading');
                settings.parameters.text = text;
                $.getJSON(url, settings.parameters, function(data) {
                    var items = '';
                    if (data) {
                        size = data.length;
                        for (i = 0; i < data.length; i++)//iterate over all options
                        {
                            for (key in data[i])//get key => value
                            {
                                items += '<li rel="' + key + '">' + data[i][key].replace(new RegExp("(" + text + ")", "i"), "<strong>$1</strong>") + '</li>';
                            }
                            list.html(items);
                            //on mouse hover over elements set selected class and on click set the selected value and close list
                            list.show().children().
						        hover(function() { $(this).addClass("selected").siblings().removeClass("selected"); }, function() { $(this).removeClass("selected") }).
						        click(function() { valueInput.val($(this).attr('rel')); textInput.val($(this).text()); clear(); doSearch();  });
                            $('.search_container_adv').css({ visibility: 'hidden' });
                        }
                        if (settings.after == "function") {
                            settings.after(textInput, text);
                        }
                    }
                    textInput.removeClass('autocomplete-loading');
                });
                oldText = text;
            }
        }

        function clear() {
            list.hide();
            size = 0;
            selected = 0;
            $('.search_container_adv').css({ visibility: 'visible' });
        }

        goButton.click(function() {
            return doSearch();
        })

        function doSearch() {
            if (textInput.val() != '') {
                if (valueInput.val() != '') {
                    window.location = valueInput.val();
                }
                else {
                    window.location = '/results/?searchtext=' + textInput.val();
                }
            }
            return false;
        }

        textInput.blur(function(e) {
            if (jQuery('.autocomplete:has(.selected)').length == 0) { clear(); }
        })

        textInput.keydown(function(e) {
            window.clearInterval(typingTimeout);
            if (e.which == 27)//escape
            {
                clear();
            } else if (e.which == 46 || e.which == 8)//delete and backspace
            {
                clear();
                //invalidate previous selection
                if (settings.validSelection) valueInput.val('');
            }
            else if (e.which == 13)//enter
            {
                if (list.css("display") == "none")//if the list is not visible then make a new request, otherwise hide the list
                {
                    getData(textInput.val());
                } else {
                    clear();
                }
                e.preventDefault();
                return doSearch();
            }
            else if (e.which == 40 || e.which == 9 || e.which == 38)//move up, down 
            {
                switch (e.which) {
                    case 40:
                    case 9:
                        selected = selected >= size - 1 ? 0 : selected + 1; break;
                    case 38:
                        selected = selected <= 0 ? size - 1 : selected - 1; break;
                    default: break;
                }
                //set selected item and input values
                textInput.val(list.children().removeClass('selected').eq(selected).addClass('selected').text());
                valueInput.val(list.children().eq(selected).attr('rel'));
            } else {
                //invalidate previous selection
                if (settings.validSelection) valueInput.val('');
                typingTimeout = window.setTimeout(function() { getData(textInput.val()) }, settings.timeout);
            }
        });
    });
};

$(function() {
    $('input#txt_search').click(function() {
        if ($(this).val() == 'experience search')
            $(this).val('');
    });
});