/*
 * jQuery The Final Countdown plugin v1.0.0 beta
 * http://github.com/hilios/jquery.countdown
 *
 * Copyright (c) 2011 Edson Hilios
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
(function ($) {

	$.fn.countdown = function (toDate, callback) {
		var handlers = ['seconds', 'minutes', 'hours', 'days', 'weeks', 'daysLeft'];

		function delegate(scope, method) {
			return function () {
				return method.call(scope)
			}
		}

		return this.each(function () {
			// Convert
			if (!(toDate instanceof Date)) {
				if (String(toDate).match(/^[0-9]*$/)) {
					toDate = new Date(toDate);
				} else if (toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]{2})/) ||
					toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})\s([0-9]{1,2})\:([0-9]{2})\:([0-9]{2})/)
				) {
					toDate = new Date(toDate);
				} else if (toDate.match(/([0-9]{1,2})\/([0-9]{1,2})\/([0-9]{2,4})/) ||
					toDate.match(/([0-9]{2,4})\/([0-9]{1,2})\/([0-9]{1,2})/)
				) {
					toDate = new Date(toDate)
				} else {
					throw new Error("Doesn't seen to be a valid date object or string")
				}
			}

			var $this = $(this),
				values = {},
				lasting = {},
				interval = $this.data('countdownInterval'),
				currentDate = new Date(),
				secondsLeft = Math.floor((toDate.valueOf() - currentDate.valueOf()) / 1000);

			function triggerEvents() {
				// Evaluate if this node is included in the html
				if ($this.closest('html').length === 0) {
					stop(); // Release the memory
					dispatchEvent('removed');
					return;
				}
				// Calculate the time offset
				secondsLeft--;
				if (secondsLeft < 0) {
					secondsLeft = 0;
				}
				lasting = {
					seconds: secondsLeft % 60,
					minutes: Math.floor(secondsLeft / 60) % 60,
					hours: Math.floor(secondsLeft / 60 / 60) % 24,
					days: Math.floor(secondsLeft / 60 / 60 / 24),
					weeks: Math.floor(secondsLeft / 60 / 60 / 24 / 7),
					daysLeft: Math.floor(secondsLeft / 60 / 60 / 24) % 7
				};
				for (var i = 0; i < handlers.length; i++) {
					var eventName = handlers[i];
					if (values[eventName] != lasting[eventName]) {
						values[eventName] = lasting[eventName];
						dispatchEvent(eventName);
					}
				}
				if (secondsLeft == 0) {
					stop();
					dispatchEvent('finished');
				}
			}

			triggerEvents();

			function dispatchEvent(eventName) {
				var event = $.Event(eventName);
				event.date = new Date(new Date().valueOf() + secondsLeft);
				event.value = values[eventName] || "0";
				event.toDate = toDate;
				event.lasting = lasting;
				switch (eventName) {
					case "seconds":
					case "minutes":
					case "hours":
						event.value = event.value < 10 ? '0' + event.value.toString() : event.value.toString();
						break;
					default:
						if (event.value) {
							event.value = event.value.toString();
						}
						break;
				}
				callback.call($this, event);
			}

			function stop() {
				clearInterval(interval);
			}

			function start() {
				$this.data('countdownInterval', setInterval(delegate($this, triggerEvents), 1000));
				interval = $this.data('countdownInterval');
			}

			if (interval) stop();
			start();
		});
	}
})(jQuery);