var phpbb = {};
phpbb.alertTime = 100;

(function($) {  // Avoid conflicts with other libraries

"use strict";

// define a couple constants for keydown functions.
var keymap = {
	ENTER: 13,
	ESC: 27
};

var dark = $('#darkenwrapper');
var loadingAlert = $('#loadingalert');
var phpbbAlertTimer = null;


/**
 * Display a loading screen
 *
 * @returns object Returns loadingAlert.
 */
phpbb.loadingAlert = function() {
	if (dark.is(':visible')) {
		loadingAlert.fadeIn(phpbb.alertTime);
	} else {
		loadingAlert.show();
		dark.fadeIn(phpbb.alertTime, function() {
			// Wait five seconds and display an error if nothing has been returned by then.
			phpbbAlertTimer = setTimeout(function() {
				if (loadingAlert.is(':visible')) {
					phpbb.alert($('#phpbb_alert').attr('data-l-err'), $('#phpbb_alert').attr('data-l-timeout-processing-req'));
				}
			}, 5000);
		});
	}

	return loadingAlert;
};

/**
 * Clear loading alert timeout
*/
phpbb.clearLoadingTimeout = function() {
	if (phpbbAlertTimer !== null) {
		clearTimeout(phpbbAlertTimer);
		phpbbAlertTimer = null;
	}
};

/**
 * Display a simple alert similar to JSs native alert().
 *
 * You can only call one alert or confirm box at any one time.
 *
 * @param string title Title of the message, eg "Information" (HTML).
 * @param string msg Message to display (HTML).
 * @param bool fadedark Remove the dark background when done? Defaults
 *     to yes.
 *
 * @returns object Returns the div created.
 */
phpbb.alert = function(title, msg, fadedark) {
	var div = $('#phpbb_alert');
	div.find('.alert_title').html(title);
	div.find('.alert_text').html(msg);

	div.bind('click', function(e) {
		e.stopPropagation();
	});
	dark.one('click', function(e) {
		var fade;

		div.find('.alert_close').unbind('click');
		fade = (typeof fadedark !== 'undefined' && !fadedark) ? div : dark;
		fade.fadeOut(phpbb.alertTime, function() {
			div.hide();
		});

		e.preventDefault();
		e.stopPropagation();
	});

	$(document).bind('keydown', function(e) {
		if (e.keyCode === keymap.ENTER || e.keyCode === keymap.ESC) {
			dark.trigger('click');

			e.preventDefault();
			e.stopPropagation();
		}
	});

	div.find('.alert_close').one('click', function(e) {
		dark.trigger('click');

		e.preventDefault();
	});

	if (loadingAlert.is(':visible')) {
		loadingAlert.fadeOut(phpbb.alertTime, function() {
			dark.append(div);
			div.fadeIn(phpbb.alertTime);
		});
	} else if (dark.is(':visible')) {
		dark.append(div);
		div.fadeIn(phpbb.alertTime);
	} else {
		dark.append(div);
		div.show();
		dark.fadeIn(phpbb.alertTime);
	}

	return div;
};

/**
 * Display a simple yes / no box to the user.
 *
 * You can only call one alert or confirm box at any one time.
 *
 * @param string msg Message to display (HTML).
 * @param function callback Callback. Bool param, whether the user pressed
 *     yes or no (or whatever their language is).
 * @param bool fadedark Remove the dark background when done? Defaults
 *     to yes.
 *
 * @returns object Returns the div created.
 */
phpbb.confirm = function(msg, callback, fadedark) {
	var div = $('#phpbb_confirm');
	div.find('.alert_text').html(msg);

	div.bind('click', function(e) {
		e.stopPropagation();
	});

	var clickHandler = function(e) {
		var res = this.className === 'button1';
		var fade = (typeof fadedark !== 'undefined' && !fadedark && res) ? div : dark;
		fade.fadeOut(phpbb.alertTime, function() {
			div.hide();
		});
		div.find('input[type="button"]').unbind('click', clickHandler);
		callback(res);

		if (e) {
			e.preventDefault();
			e.stopPropagation();
		}
	};
	div.find('input[type="button"]').one('click', clickHandler);

	dark.one('click', function(e) {
		div.find('.alert_close').unbind('click');
		dark.fadeOut(phpbb.alertTime, function() {
			div.hide();
		});
		callback(false);

		e.preventDefault();
		e.stopPropagation();
	});

	$(document).bind('keydown', function(e) {
		if (e.keyCode === keymap.ENTER) {
			$('input[type="button"].button1').trigger('click');
			e.preventDefault();
			e.stopPropagation();
		} else if (e.keyCode === keymap.ESC) {
			$('input[type="button"].button2').trigger('click');
			e.preventDefault();
			e.stopPropagation();
		}
	});

	div.find('.alert_close').one('click', function(e) {
		var fade = (typeof fadedark !== 'undefined' && fadedark) ? div : dark;
		fade.fadeOut(phpbb.alertTime, function() {
			div.hide();
		});
		callback(false);

		e.preventDefault();
	});

	if (loadingAlert.is(':visible')) {
		loadingAlert.fadeOut(phpbb.alertTime, function() {
			dark.append(div);
			div.fadeIn(phpbb.alertTime);
		});
	} else if (dark.is(':visible')) {
		dark.append(div);
		div.fadeIn(phpbb.alertTime);
	} else {
		dark.append(div);
		div.show();
		dark.fadeIn(phpbb.alertTime);
	}

	return div;
};

/**
 * Turn a querystring into an array.
 *
 * @argument string string The querystring to parse.
 * @returns object The object created.
 */
phpbb.parseQuerystring = function(string) {
	var params = {}, i, split;

	string = string.split('&');
	for (i = 0; i < string.length; i++) {
		split = string[i].split('=');
		params[split[0]] = decodeURIComponent(split[1]);
	}
	return params;
};


/**
 * Makes a link use AJAX instead of loading an entire page.
 *
 * This function will work for links (both standard links and links which
 * invoke confirm_box) and forms. It will be called automatically for links
 * and forms with the data-ajax attribute set, and will call the necessary
 * callback.
 *
 * For more info, view the following page on the phpBB wiki:
 * http://wiki.phpbb.com/JavaScript_Function.phpbb.ajaxify
 *
 * @param object options Options.
 * @param bool/function refresh If we are sent back a refresh, should it be
 *     acted upon? This can either be true / false / a function.
 * @param function callback Callback to call on completion of event. Has
 *     three parameters: the element that the event was evoked from, the JSON
 *     that was returned and (if it is a form) the form action.
 */
phpbb.ajaxify = function(options) {
	var elements = $(options.selector),
		refresh = options.refresh,
		callback = options.callback,
		overlay = (typeof options.overlay !== 'undefined') ? options.overlay : true,
		isForm = elements.is('form'),
		eventName = isForm ? 'submit' : 'click';

	elements.bind(eventName, function(event) {
		var action, method, data, submit, that = this, $this = $(this);

		if ($this.find('input[type="submit"][data-clicked]').attr('data-ajax') === 'false') {
			return;
		}

		function errorHandler() {
			phpbb.clearLoadingTimeout();
			phpbb.alert(dark.attr('data-ajax-error-title'), dark.attr('data-ajax-error-text'));
		}

		/**
		 * This is a private function used to handle the callbacks, refreshes
		 * and alert. It calls the callback, refreshes the page if necessary, and
		 * displays an alert to the user and removes it after an amount of time.
		 *
		 * It cannot be called from outside this function, and is purely here to
		 * avoid repetition of code.
		 *
		 * @param object res The object sent back by the server.
		 */
		function returnHandler(res) {
			var alert;

			phpbb.clearLoadingTimeout();

			// Is a confirmation required?
			if (typeof res.S_CONFIRM_ACTION === 'undefined') {
				// If a confirmation is not required, display an alert and call the
				// callbacks.
				if (typeof res.MESSAGE_TITLE !== 'undefined') {
					alert = phpbb.alert(res.MESSAGE_TITLE, res.MESSAGE_TEXT);
				} else {
					dark.fadeOut(phpbb.alertTime);
				}

				if (typeof phpbb.ajaxCallbacks[callback] === 'function') {
					phpbb.ajaxCallbacks[callback].call(that, res);
				}

				// If the server says to refresh the page, check whether the page should
				// be refreshed and refresh page after specified time if required.
				if (res.REFRESH_DATA) {
					if (typeof refresh === 'function') {
						refresh = refresh(res.REFRESH_DATA.url);
					} else if (typeof refresh !== 'boolean') {
						refresh = false;
					}

					setTimeout(function() {
						if (refresh) {
							window.location = res.REFRESH_DATA.url;
						}

						// Hide the alert even if we refresh the page, in case the user
						// presses the back button.
						dark.fadeOut(phpbb.alertTime, function() {
							alert.hide();
						});
					}, res.REFRESH_DATA.time * 1000); // Server specifies time in seconds
				}
			} else {
				// If confirmation is required, display a dialog to the user.
				phpbb.confirm(res.MESSAGE_BODY, function(del) {
					if (del) {
						phpbb.loadingAlert();
						data =  $('<form>' + res.S_HIDDEN_FIELDS + '</form>').serialize();
						$.ajax({
							url: res.S_CONFIRM_ACTION,
							type: 'POST',
							data: data + '&confirm=' + res.YES_VALUE,
							success: returnHandler,
							error: errorHandler
						});
					}
				}, false);
			}
		}

		// If the element is a form, POST must be used and some extra data must
		// be taken from the form.
		var runFilter = (typeof options.filter === 'function');

		if (isForm) {
			action = $this.attr('action').replace('&amp;', '&');
			data = $this.serializeArray();
			method = $this.attr('method') || 'GET';

			if ($this.find('input[type="submit"][data-clicked]')) {
				submit = $this.find('input[type="submit"][data-clicked]');
				data.push({
					name: submit.attr('name'),
					value: submit.val()
				});
			}
		} else {
			action = this.href;
			data = null;
			method = 'GET';
		}

		// If filter function returns false, cancel the AJAX functionality,
		// and return true (meaning that the HTTP request will be sent normally).
		if (runFilter && !options.filter.call(this, data)) {
			return;
		}

		if (overlay && (typeof $this.attr('data-overlay') === 'undefined' || $this.attr('data-overlay') === 'true')) {
			phpbb.loadingAlert();
		}

		$.ajax({
			url: action,
			type: method,
			data: data,
			success: returnHandler,
			error: errorHandler
		});

		event.preventDefault();
	});

	if (isForm) {
		elements.find('input:submit').click(function () {
			var $this = $(this);

			$this.siblings('[data-clicked]').removeAttr('data-clicked');
			$this.attr('data-clicked', 'true');
		});
	}

	return this;
};

/**
* Hide the optgroups that are not the selected timezone
*
* @param	bool	keepSelection		Shall we keep the value selected, or shall the user be forced to repick one.
*/
phpbb.timezoneSwitchDate = function(keepSelection) {
	if ($('#timezone_copy').length === 0) {
		// We make a backup of the original dropdown, so we can remove optgroups
		// instead of setting display to none, because IE and chrome will not
		// hide options inside of optgroups and selects via css
		$('#timezone').clone().attr('id', 'timezone_copy').css('display', 'none').attr('name', 'tz_copy').insertAfter('#timezone');
	} else {
		// Copy the content of our backup, so we can remove all unneeded options
		$('#timezone').replaceWith($('#timezone_copy').clone().attr('id', 'timezone').css('display', 'block').attr('name', 'tz'));
	}

	if ($('#tz_date').val() !== '') {
		$('#timezone > optgroup').remove(":not([label='" + $('#tz_date').val() + "'])");
	}

	if ($('#tz_date').val() === $('#tz_select_date_suggest').attr('data-suggested-tz')) {
		$('#tz_select_date_suggest').css('display', 'none');
	} else {
		$('#tz_select_date_suggest').css('display', 'inline');
	}

	if ($("#timezone > optgroup[label='" + $('#tz_date').val() + "'] > option").size() === 1) {
		// If there is only one timezone for the selected date, we just select that automatically.
		$("#timezone > optgroup[label='" + $('#tz_date').val() + "'] > option:first").attr('selected', true);
		keepSelection = true;
	}

	if (typeof keepSelection !== 'undefined' && !keepSelection) {
		var timezoneOptions = $('#timezone > optgroup option');
		if (timezoneOptions.filter(':selected').length <= 0) {
			timezoneOptions.filter(':first').attr('selected', true);
		}
	}
};

/**
* Display the date/time select
*/
phpbb.timezoneEnableDateSelection = function() {
	$('#tz_select_date').css('display', 'block');
};

/**
* Preselect a date/time or suggest one, if it is not picked.
*
* @param	bool	forceSelector		Shall we select the suggestion?
*/
phpbb.timezonePreselectSelect = function(forceSelector) {

	// The offset returned here is in minutes and negated.
	// http://www.w3schools.com/jsref/jsref_getTimezoneOffset.asp
	var offset = (new Date()).getTimezoneOffset();
	var sign = '-';

	if (offset < 0) {
		sign = '+';
		offset = -offset;
	}

	var minutes = offset % 60;
	var hours = (offset - minutes) / 60;

	if (hours < 10) {
		hours = '0' + hours.toString();
	} else {
		hours = hours.toString();
	}

	if (minutes < 10) {
		minutes = '0' + minutes.toString();
	} else {
		minutes = minutes.toString();
	}

	var prefix = 'GMT' + sign + hours + ':' + minutes;
	var prefixLength = prefix.length;
	var selectorOptions = $('#tz_date > option');
	var i;

	for (i = 0; i < selectorOptions.length; ++i) {
		var option = selectorOptions[i];

		if (option.value.substring(0, prefixLength) === prefix) {
			if ($('#tz_date').val() !== option.value && !forceSelector) {
				// We do not select the option for the user, but notify him,
				// that we would suggest a different setting.
				phpbb.timezoneSwitchDate(true);
				$('#tz_select_date_suggest').css('display', 'inline');
			} else {
				option.selected = true;
				phpbb.timezoneSwitchDate(!forceSelector);
				$('#tz_select_date_suggest').css('display', 'none');
			}

			$('#tz_select_date_suggest').attr('title', $('#tz_select_date_suggest').attr('data-l-suggestion').replace("%s", option.innerHTML));
			$('#tz_select_date_suggest').attr('value', $('#tz_select_date_suggest').attr('data-l-suggestion').replace("%s", option.innerHTML.substring(0, 9)));
			$('#tz_select_date_suggest').attr('data-suggested-tz', option.innerHTML);

			// Found the suggestion, there cannot be more, so return from here.
			return;
		}
	}
};

// Toggle notification list
$('#notification_list_button').click(function(e) {
	$('#notification_list').toggle();
	e.preventDefault();
});
$('#phpbb').click(function(e) {
    var target = $(e.target);

    if (!target.is('#notification_list') && !target.is('#notification_list_button') && !target.parents().is('#notification_list')) {
        $('#notification_list').hide();
    }
});

phpbb.ajaxCallbacks = {};

/**
 * Adds an AJAX callback to be used by phpbb.ajaxify.
 *
 * See the phpbb.ajaxify comments for information on stuff like parameters.
 *
 * @param string id The name of the callback.
 * @param function callback The callback to be called.
 */
phpbb.addAjaxCallback = function(id, callback) {
	if (typeof callback === 'function') {
		phpbb.ajaxCallbacks[id] = callback;
	}
	return this;
};


/**
 * This callback alternates text - it replaces the current text with the text in
 * the alt-text data attribute, and replaces the text in the attribute with the
 * current text so that the process can be repeated.
 */
phpbb.addAjaxCallback('alt_text', function() {
	var el = $(this),
		altText;

	altText = el.attr('data-alt-text');
	el.attr('data-alt-text', el.text());
	el.attr('title', altText);
	el.text(altText);
});

/**
 * This callback is based on the alt_text callback.
 *
 * It replaces the current text with the text in the alt-text data attribute,
 * and replaces the text in the attribute with the current text so that the
 * process can be repeated.
 * Additionally it replaces the class of the link's parent
 * and changes the link itself.
 */
phpbb.addAjaxCallback('toggle_link', function() {
	var el = $(this),
		toggleText,
		toggleUrl,
		toggleClass;

	// Toggle link text

	toggleText = el.attr('data-toggle-text');
	el.attr('data-toggle-text', el.text());
	el.attr('title', toggleText);
	el.text(toggleText);

	// Toggle link url
	toggleUrl = el.attr('data-toggle-url');
	el.attr('data-toggle-url', el.attr('href'));
	el.attr('href', toggleUrl);

	// Toggle class of link parent
	toggleClass = el.attr('data-toggle-class');
	el.attr('data-toggle-class', el.parent().attr('class'));
	el.parent().attr('class', toggleClass);
});

/**
* Automatically resize textarea
*
* This function automatically resizes textarea elements when user
* types text.
*
* @param {jQuery} items jQuery object(s) to resize
* @param {object} options Optional parameter that adjusts default
* 	configuration. See configuration variable
*
* Optional parameters:
*	minWindowHeight {number} Minimum browser window height when textareas are resized. Default = 500
*	minHeight {number} Minimum height of textarea. Default = 200
*	maxHeight {number} Maximum height of textarea. Default = 500
*	heightDiff {number} Minimum difference between window and textarea height. Default = 200
*	resizeCallback {function} Function to call after resizing textarea
*	resetCallback {function} Function to call when resize has been canceled

*		Callback function format: function(item) {}
*			this points to DOM object
*			item is a jQuery object, same as this
*/
phpbb.resizeTextArea = function(items, options) {
	// Configuration
	var configuration = {
		minWindowHeight: 500,
		minHeight: 200,
		maxHeight: 500,
		heightDiff: 200,
		resizeCallback: function(item) { },
		resetCallback: function(item) { }
	};

	if (arguments.length > 1)
	{
		configuration = $.extend(configuration, options);
	}

	function resetAutoResize(item) 
	{
		var $item = $(item);
		if ($item.hasClass('auto-resized'))
		{
			$(item).css({height: '', resize: ''}).removeClass('auto-resized');
			configuration.resetCallback.call(item, $item);
		}
	}

	function autoResize(item) 
	{
		function setHeight(height)
		{
			$item.css({height: height + 'px', resize: 'none'}).addClass('auto-resized');
			configuration.resizeCallback.call(item, $item);
		}

		var windowHeight = $(window).height();

		if (windowHeight < configuration.minWindowHeight)
		{
			resetAutoResize(item);
			return;
		}

		var maxHeight = Math.min(Math.max(windowHeight - configuration.heightDiff, configuration.minHeight), configuration.maxHeight),
			$item = $(item),
			height = parseInt($item.height()),
			scrollHeight = (item.scrollHeight) ? item.scrollHeight : 0;

		if (height > maxHeight)
		{
			setHeight(maxHeight);
		}
		else if (scrollHeight > (height + 5))
		{
			setHeight(Math.min(maxHeight, scrollHeight));
		}
	}

	items.bind('focus change keyup', function() {
		$(this).each(function() {
			autoResize(this);
		});
	}).change();

	$(window).resize(function() {
		items.each(function() {
			if ($(this).hasClass('auto-resized'))
			{
				autoResize(this);
			}
		});
	});
};


})(jQuery); // Avoid conflicts with other libraries