/**
 * jQuery TOOLS plugin :: scrollable.navigator 1.0.2
 *
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/scrollable.html#navigator
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : September 2009
 * Date: ${date}
 * Revision: ${revision}
 */
(function($) {

	var t = $.tools.scrollable;
	t.plugins = t.plugins || {};

	t.plugins.navigator = {
		version: '1.0.2',

		conf: {
			navi: '.navi',
			naviItem: null,
			activeClass: 'active',
			indexed: false,
			api: false,
			idPrefix: null
		}
	};

	// jQuery plugin implementation
	$.fn.navigator = function(conf) {

		var globals = $.extend({}, t.plugins.navigator.conf), ret;
		if (typeof conf == 'string') { conf = {navi: conf}; }

		conf = $.extend(globals, conf);

		this.each(function() {

			var api = $(this).scrollable(),
				 root = api.getRoot(),
				 navi = root.data("finder").call(null, conf.navi),
				 els = null,
				 buttons = api.getNaviButtons();

			if (api) { ret = api; }

			api.getNaviButtons = function() {
				return buttons.add(navi);
			};

			// generate new entries
			function reload() {


				if (!navi.children().length || navi.data("navi") == api) {

					navi.empty();
					navi.data("navi", api);

					for (var i = 0; i < api.getPageAmount(); i++) {
						navi.append($("<" + (conf.naviItem || 'a') + "/>"));
					}

					els = navi.children().each(function(i) {
						var el = $(this);
						el.click(function(e) {
							api.setPage(i);
							return e.preventDefault();
						});

						// possible index number
						if (conf.indexed)  { el.text(i); }
						if (conf.idPrefix) { el.attr("id", conf.idPrefix + i); }
					});


				// assign onClick events to existing entries
				} else {

					// find a entries first -> syntaxically correct
					els = conf.naviItem ? navi.find(conf.naviItem) : navi.children();

					els.each(function(i)  {
						var el = $(this);

						el.click(function(evt) {
							api.setPage(i);
							return evt.preventDefault();
						});

					});
				}

				// activate first entry
				els.eq(0).addClass(conf.activeClass);

			}

			// activate correct entry
			api.onStart(function(e, index) {
				var cls = conf.activeClass;
				els.removeClass(cls).eq(api.getPageIndex()).addClass(cls);
			});

			api.onReload(function() {
				reload();
			});

			reload();

			// look for correct navi item from location.hash
			var el = els.filter("[href=" + location.hash + "]");
			if (el.length) { api.move(els.index(el)); }


		});

		return conf.api ? ret : this;

	};

})(jQuery);