/**

 * Javascript auto-completion for form fields. jQuery based in 1.1.5.

 * Different types of auto-completion fields can be defined (e.g. with different data sets). For each one, a schema

 * can be created describing how to draw each row.

 */

var autofill_schemas = window.autofill_schemas || {};

/**

 * SCHEMA - GENERIC

 */

autofill_schemas.generic = {

	init: function(element, fillclass, params)

	{

		$(element).autocomplete(makeUrlNS('Special', 'Autofill', 'type=' + fillclass) + '&userinput=', {

				minChars: 3

		});

	}

}

/**

 * SCHEMA - USERNAME

 */

autofill_schemas.username = {

	init: function(element, fillclass, params)

	{

		params = params || {};

		var allow_anon = params.allow_anon ? '1' : '0';

		$(element).autocomplete(makeUrlNS('Special', 'Autofill', 'type=' + fillclass + '&allow_anon=' + allow_anon) + '&userinput=', {

				minChars: 3,

				formatItem: function(row, _, __)

				{

					var html = row.name_highlight + ' – ';

					html += '<span style="' + row.rank_style + '">' + row.rank_title + '</span>';

					return html;

				},

				tableHeader: '<tr><th>' + $lang.get('user_autofill_heading_suggestions') + '</th></tr>',

				showWhenNoResults: true,

				noResultsHTML: '<tr><td class="row1" style="font-size: smaller;">' + $lang.get('user_autofill_msg_no_suggestions') + '</td></tr>'

		});

	}

}

autofill_schemas.page = {

	init: function(element, fillclass, params)

	{

		$(element).autocomplete(makeUrlNS('Special', 'Autofill', 'type=' + fillclass) + '&userinput=', {

				minChars: 3,

				formatItem: function(row, _, __)

				{

					var html = '<u>' + row.name_highlight + '</u>';

					html += ' – ' + row.pid_highlight;

					return html;

				},

				showWhenNoResults: true,

				noResultsHTML: '<tr><td class="row1" style="font-size: smaller;">' + $lang.get('user_autofill_msg_no_suggestions') + '</td></tr>'

		});

	}

}

window.autofill_init_element = function(element, params)

{

	if ( element.af_initted )

		return false;

	params = params || {};

	// assign an ID if it doesn't have one yet

	if ( !element.id )

	{

		element.id = 'autofill_' + Math.floor(Math.random() * 100000);

	}

	var id = element.id;

	// get the fill type

	var fillclass = element.className;

	fillclass = fillclass.split(' ');

	fillclass = fillclass[1];

	var schema = ( autofill_schemas[fillclass] ) ? autofill_schemas[fillclass] : autofill_schemas['generic'];

	if ( typeof(schema.init) != 'function' )

	{

		schema.init = autofill_schemas.generic.init;

	}

	schema.init(element, fillclass, params);

	element.af_initted = true;

}

window.AutofillUsername = function(el, allow_anon)

{

	el.onkeyup = null;

	el.className = 'autofill username';

	autofill_init_element(el, { allow_anon: allow_anon });

}

window.AutofillPage = function(el)

{

	el.onkeyup = null;

	el.className = 'autofill page';

	autofill_init_element(el, {});

}

// note: init, then onload (the latter is called automatically)

window.autofill_onload = function()

{

	if ( this.loaded )

	{

		return true;

	}

	var inputs = document.getElementsByClassName('input', 'autofill');

	if ( inputs.length > 0 )

	{

		// we have at least one input that needs to be made an autofill element.

		// is spry data loaded?

		load_component('l10n');

	}

	this.loaded = true;

	for ( var i = 0; i < inputs.length; i++ )

	{

		autofill_init_element(inputs[i]);

	}

}

window.autofill_init = function()

{

	load_component(['l10n', 'jquery', 'jquery-ui']);

	if ( !window.jQuery )

	{

		throw('jQuery didn\'t load properly. Aborting auto-complete init.');

	}

	jQuery.autocomplete = function(input, options) {

		// Create a link to self

		var me = this;

		// Create jQuery object for input element

		var $input = $(input).attr("autocomplete", "off");

		// Apply inputClass if necessary

		if (options.inputClass) {

			$input.addClass(options.inputClass);

		}

		// Create results

		var results = document.createElement("div");

		$(results).addClass('tblholder').css('z-index', getHighestZ() + 1).css('margin-top', 0);

		$(results).css('clip', 'rect(0px,auto,auto,0px)').css('overflow', 'auto').css('max-height', '300px');

		// Create jQuery object for results

		// var $results = $(results);

		var $results = $(results).hide().addClass(options.resultsClass).css("position", "absolute");

		if( options.width > 0 ) {

			$results.css("width", options.width);

		}

		// Add to body element

		$("body").append(results);

		input.autocompleter = me;

		var timeout = null;

		var prev = "";

		var active = -1;

		var cache = {};

		var keyb = false;

		// hasFocus was false by default, see if making it true helps

		var hasFocus = true;

		var hasNoResults = false;

		var lastKeyPressCode = null;

		var mouseDownOnSelect = false;

		var hidingResults = false;

		// flush cache

		function flushCache(){

			cache = {};

			cache.data = {};

			cache.length = 0;

		};

		// flush cache

		flushCache();

		// if there is a data array supplied

		if( options.data != null ){

			var sFirstChar = "", stMatchSets = {}, row = [];

			// no url was specified, we need to adjust the cache length to make sure it fits the local data store

			if( typeof options.url != "string" ) {

				options.cacheLength = 1;

			}

			// loop through the array and create a lookup structure

			for( var i=0; i < options.data.length; i++ ){

				// if row is a string, make an array otherwise just reference the array

				row = ((typeof options.data[i] == "string") ? [options.data[i]] : options.data[i]);

				// if the length is zero, don't add to list

				if( row[0].length > 0 ){

					// get the first character

					sFirstChar = row[0].substring(0, 1).toLowerCase();

					// if no lookup array for this character exists, look it up now

					if( !stMatchSets[sFirstChar] ) stMatchSets[sFirstChar] = [];

					// if the match is a string

					stMatchSets[sFirstChar].push(row);

				}

			}

			// add the data items to the cache

			if ( options.cacheLength )

			{

				for( var k in stMatchSets ) {

					// increase the cache size

					options.cacheLength++;

					// add to the cache

					addToCache(k, stMatchSets[k]);

				}

			}

		}

		$input

		.keydown(function(e) {

			// track last key pressed

			lastKeyPressCode = e.keyCode;

			switch(e.keyCode) {

				case 38: // up

					e.preventDefault();

					moveSelect(-1);

					break;

				case 40: // down

					e.preventDefault();

					moveSelect(1);

					break;

				case 9:  // tab

				case 13: // return

					if( selectCurrent() ){

						// make sure to blur off the current field

						// (Enano edit - why do we want this, again?)

						// $input.get(0).blur();

						e.preventDefault();

					}

					break;

				default:

					active = -1;

					if (timeout) clearTimeout(timeout);

					timeout = setTimeout(function(){onChange();}, options.delay);

					break;

			}

		})

		.focus(function(){

			// track whether the field has focus, we shouldn't process any results if the field no longer has focus

			hasFocus = true;

		})

		.blur(function() {

			// track whether the field has focus

			hasFocus = false;

			if (!mouseDownOnSelect) {

				hideResults();

			}

		});

		hideResultsNow();

		function onChange() {

			// ignore if the following keys are pressed: [del] [shift] [capslock]

			if( lastKeyPressCode == 46 || (lastKeyPressCode > 8 && lastKeyPressCode < 32) ) return $results.hide();

			var v = $input.val();

			if (v == prev) return;

			prev = v;

			if (v.length >= options.minChars) {

				$input.addClass(options.loadingClass);

				requestData(v);

			} else {

				$input.removeClass(options.loadingClass);

				$results.hide();

			}

		};

		function moveSelect(step) {

			var lis = $("td", results);

			if (!lis || hasNoResults) return;

			active += step;

			if (active < 0) {

				active = 0;

			} else if (active >= lis.size()) {

				active = lis.size() - 1;

			}

			lis.removeClass("row2");

			$(lis[active]).addClass("row2");

			// scroll the results div

			// are we going up or down?

			var td_top = $dynano(lis[active]).Top() - $dynano(results).Top();

			var td_height = $dynano(lis[active]).Height();

			var td_bottom = td_top + td_height;

			var visibleTopBoundary = getScrollOffset(results);

			var results_height = $dynano(results).Height();

			var visibleBottomBoundary = visibleTopBoundary + results_height;

			var scrollTo = false;

			if ( td_top < visibleTopBoundary && step < 0 )

			{

				// going up: scroll the results div to just higher than the result we're trying to see

				scrollTo = td_top - 7;

			}

			else if ( td_bottom > visibleBottomBoundary && step > 0 )

			{

				// going down is a little harder, we want the result to be at the bottom

				scrollTo = td_top - results_height + td_height + 7;

			}

			if ( scrollTo )

			{

				results.scrollTop = scrollTo;

			}

			// Weird behaviour in IE

			// if (lis[active] && lis[active].scrollIntoView) {

			// 	lis[active].scrollIntoView(false);

			// }

		};

		function selectCurrent() {

			var li = $("td.row2", results)[0];

			if (!li) {

				var $li = $("td", results);

				if (options.selectOnly) {

					if ($li.length == 1) li = $li[0];

				} else if (options.selectFirst) {

					li = $li[0];

				}

			}

			if (li) {

				selectItem(li);

				return true;

			} else {

				return false;

			}

		};

		function selectItem(li) {

			if (!li) {

				li = document.createElement("li");

				li.extra = [];

				li.selectValue = "";

			}

			var v = $.trim(li.selectValue ? li.selectValue : li.innerHTML);

			input.lastSelected = v;

			prev = v;

			$results.html("");

			$input.val(v);

			hideResultsNow();

			if (options.onItemSelect) {

				setTimeout(function() { options.onItemSelect(li) }, 1);

			}

		};

		// selects a portion of the input string

		function createSelection(start, end){

			// get a reference to the input element

			var field = $input.get(0);

			if( field.createTextRange ){

				var selRange = field.createTextRange();

				selRange.collapse(true);

				selRange.moveStart("character", start);

				selRange.moveEnd("character", end);

				selRange.select();

			} else if( field.setSelectionRange ){

				field.setSelectionRange(start, end);

			} else {

				if( field.selectionStart ){

					field.selectionStart = start;

					field.selectionEnd = end;

				}

			}

			field.focus();

		};

		// fills in the input box w/the first match (assumed to be the best match)

		function autoFill(sValue){

			// if the last user key pressed was backspace, don't autofill

			if( lastKeyPressCode != 8 ){

				// fill in the value (keep the case the user has typed)

				$input.val($input.val() + sValue.substring(prev.length));

				// select the portion of the value not typed by the user (so the next character will erase)

				createSelection(prev.length, sValue.length);

			}

		};

		function showResults() {

			// get the position of the input field right now (in case the DOM is shifted)

			var pos = findPos(input);

			// either use the specified width, or autocalculate based on form element

			var iWidth = (options.width > 0) ? options.width : $input.width();

			// reposition

			$results.css({

				width: parseInt(iWidth) + "px",

				top: (pos.y + input.offsetHeight) + "px",

				left: pos.x + "px"

			});

			if ( !$results.is(":visible") )

			{

				$results.show("blind", {}, 200);

			}

			else

			{

				$results.show();

			}

		};

		function hideResults() {

			if (timeout) clearTimeout(timeout);

			timeout = setTimeout(hideResultsNow, 200);

		};

		function hideResultsNow() {

			if (hidingResults) {

				return;

			}

			hidingResults = true;

			if (timeout) {

				clearTimeout(timeout);

			}

			var v = $input.removeClass(options.loadingClass).val();

			if ($results.is(":visible")) {

				$results.hide();

			}

			if (options.mustMatch) {

				if (!input.lastSelected || input.lastSelected != v) {

					selectItem(null);

				}

			}

			hidingResults = false;

		};

		function receiveData(q, data) {

			if (data) {

				$input.removeClass(options.loadingClass);

				results.innerHTML = "";

				// if the field no longer has focus or if there are no matches, do not display the drop down

				if( !hasFocus )

				{

					return hideResultsNow();

				}

				if ( data.length == 0 && !options.showWhenNoResults )

				{

					return hideResultsNow();

				}

				hasNoResults = false;

				if ($.browser.msie) {

					// we put a styled iframe behind the calendar so HTML SELECT elements don't show through

					$results.append(document.createElement('iframe'));

				}

				results.appendChild(dataToDom(data));

				// autofill in the complete box w/the first match as long as the user hasn't entered in more data

				if( options.autoFill && ($input.val().toLowerCase() == q.toLowerCase()) ) autoFill(data[0][0]);

				showResults();

			} else {

				hideResultsNow();

			}

		};

		function parseData(data) {

			if (!data) return null;

			var parsed = parseJSON(data);

			return parsed;

		};

		function dataToDom(data) {

			var ul = document.createElement("table");

			$(ul).attr("border", "0").attr("cellspacing", "1").attr("cellpadding", "3");

			var num = data.length;

			if ( options.tableHeader )

			{