/* Copyright (c) 2008 Kean Loong Tan http://www.gimiti.com/kltan
 * Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * Copyright notice and license must remain intact for legal use
 * jSuggest
 * Version: 1.0 (May 26, 2008)
 * Requires: jQuery 1.2.6+
 *
 * Modified by Peter McNeil to
 * - only ask for suggestions after no suggestions returned when the query string doesn't start with the last unsuccessful query
 * - add an onclick function option click: function(){blah}
 *
 */
(function($) {
		  
    $.fn.jSuggest = function(options) {
        // merge users option with default options
        var opts = $.extend({}, $.fn.jSuggest.defaults, options);
        var jH = ".jSuggestHover";
        var jsH = "jSuggestHover";
        var iniVal = this.value;
        var textBox = this;
        var textVal = this.value;
        var jC = "#jSuggestContainer";
        var defaultData = opts.data;
        var unsuccessful = null;

        $("body").append('<div id="jSuggestContainer"></div>');
        $(jC).hide();
        $(this).bind("keyup click", function(e){
            textBox = this;
            textVal = this.value;
            if (this.value.length >= opts.minchar && $.trim(this.value)!="Search Terms") {
                var offSet = $(this).offset();
				
                $(jC).css({
                    position: "absolute",
                    top: offSet.top + $(this).outerHeight() + "px",
                    left: offSet.left,
                    width: $(this).outerWidth()-2 + "px",
                    opacity: opts.opacity,
                    zIndex: opts.zindex
                }).show();
				
                // if escape key
                if (e.keyCode == 27 ) {
                    $(jC).hide();
                }
				
                // if enter key
                else if (e.keyCode == 13 ) {
                    if ($(jH).length == 1)
                        $(textBox).val($(jH).text());
                    $(jC).hide();
                    iniVal = textBox.value;
                }
                // if down arrow
                else if (e.keyCode == 40) {
                    // if any suggestion is highlighted
                    if ($(jH).length == 1) {
                        if (!$(jH).next().length == 0) {
                            $(jH).next().addClass(jsH);
                            $(".jSuggestHover:eq(0)").removeClass(jsH);
                            if (opts.autoChange)
                                $(textBox).val($(jH).text());
                        }
                    }
                    else {
                        $("#jSuggestContainer ul li:first-child").addClass(jsH);
                        if (opts.autoChange)
                            $(textBox).val($(jH).text());
                    }
					
                }
				
                // if up arrow
                else if (e.keyCode == 38) {
                    // if any suggestion is highlighted
                    if ($(jH).length == 1 ) {
                        if (!$(jH).prev().length == 0) {
                            $(jH).prev().addClass(jsH);
                            $(".jSuggestHover:eq(1)").removeClass(jsH);
                            if (opts.autoChange)
                                $(textBox).val($(jH).text());
                        }
                        // if is first child
                        else {
                            $(jH).removeClass(jsH);
                            $(textBox).val(iniVal);
                        }
                    }
                }
                // new query detected
                else if (textBox.value != iniVal && (!unsuccessful || !textBox.value.match("^"+unsuccessful))){
                    iniVal = textBox.value;
                    if ($(".jSuggestLoading").length==0)
                        $('<div class="jSuggestLoading"><img src="'+opts.loadingImg+'" align="bottom" /> '+ opts.loadingText+'</div>').prependTo("#jSuggestContainer");
					
                    $(".jSuggestLoading").show();
                    $(jC).find('ul').remove();
					
                    if (opts.data == '')
                        opts.data = $(this).serialize();
                    else
                        opts.data = defaultData + "=" + $(this).val();
                    // optimize server performance by loading at intervals
                    setTimeout(function () {
                        $.ajax({
                            type: opts.type,
                            url: opts.url,
                            data: opts.data,
                            success: function(msg){
                                if(msg.length > 0){
                                    unsuccessful = null;
                                    $(jC).find('ul').remove();
                                    $(jC).append(msg);
                                    $("#jSuggestContainer ul li").bind("mouseover",	function(){
                                        $(jH).removeClass(jsH);
                                        $(this).addClass(jsH);
                                        textVal = $(this).text();
                                        if (opts.autoChange)
                                            $(textBox).val($(jH).text());
                                    });
                                    $("#jSuggestContainer ul li").click(function(){
                                        $(this).addClass(jsH);
                                        $(textBox).val(textVal);
                                        if(opts.click){
                                            opts.click(textVal);
                                        }
                                    });
                                    $(".jSuggestLoading").hide();
                                } else {
                                    unsuccessful = iniVal;
                                    $(".jSuggestLoading").hide();
                                }
                            }
                        });
                    }, opts.delay);
                }
            }
            // if text is too short do nothing and hide everything
            else {
                $(jH).removeClass(jsH);
                $(jC).hide();
            }
			
            // no bubbling, click is binded to textBox to prevent document bind from firing
            return false;
        });
		
        // why no use $(this).blur ?, because jSuggest box is hidden before click fires so this is the only way to do it
        // alternate way is to say that text blur will fire before$("#jSuggestContainer ul li") click.
        $(document).bind("click", function(){
            $(jC).hide();
            iniVal = textBox.value;
        });

    };
	
    $.fn.jSuggest.defaults = {
        minchar: 3,
        opacity: 1.0,
        zindex: 20000,
        delay: 2500,
        loadingImg: 'ajax-loader.gif',
        loadingText: 'Loading...',
        autoChange: false,
        url: "",
        type: "GET",
        data: ""
    };
		
	
		  

})(jQuery);