/**
 * Handle: init_admin_calendar
 * Version: 1.0
 * Deps: jQuery
 * Enqueue: true
 */

jQuery(document).ready(function ($) {
	var filter = function (active) {
			$('#aec-filter li').next().fadeTo(0, 0.5).removeClass('active');
			$(active).parent().fadeTo(250, 1).addClass('active');
			calendar.fullCalendar('rerenderEvents');
		},
		toUnixDate = function (date) {
			return $.fullCalendar.formatDate(date, 'yyyy-MM-dd HH:mm:ss'); // unix datetime
		},
		eventHandlers = function () {
			if (isFilter) {
				$('#aec-filter li a').click(function () {
					filter(this);
				});
			}

			// quick navigation
			if ($('#aec-quickselect').length === 0) {
				$('.fc-button-prev', '.fc-header').after('<div id="aec-quickselect"></div>');
			}
			$.datepicker.setDefaults($.datepicker.regional[custom.locale]);
			var quickSelect = $('#aec-quickselect').datepicker({
				changeMonth: true,
				changeYear: true,
				onChangeMonthYear: function (year, month, inst) {
					if (inst.selectedMonth !== inst.currentMonth || inst.selectedYear !== inst.currentYear) {
						calendar.fullCalendar('gotoDate', year, month - 1);
					}
				}
			});
			$('.fc-button-prev, .fc-button-next, .fc-button-today', '.fc-header').click(function (e) {
				var date = calendar.fullCalendar('getDate');
				quickSelect.datepicker("setDate", date);
			});

			// mousewheel navigation
			if (custom.scroll == 1) {
				$('#aec-calendar').mousewheel(function (e, delta) {
					var scroll = (delta > 0) ? -1 : 1,
						view = calendar.fullCalendar('getView');
					switch (view.name) {
					case 'month':
						calendar.fullCalendar('incrementDate', 0, scroll, 0);
						break;
					case 'basicWeek':
						calendar.fullCalendar('incrementDate', 0, 0, scroll * 7);
						break;
					case 'basicDay':
						calendar.fullCalendar('incrementDate', 0, 0, scroll);
						break;
					case 'agendaDay':
					case 'agendaWeek':
						return;
					}
					quickSelect.datepicker("setDate", calendar.fullCalendar('getDate'));
					return false;
				 m });
			}
		},
		renderEvent = function (data) {
			$.each(data, function (index, d) {
				$('#aec-calendar').fullCalendar('renderEvent', {
					id:			d.id,
					title:		d.title,
					allDay:		d.allDay,
					start:		d.start,
					end:		d.end,
					className:	d.className
				}, false);
			});
			return data[0].title;
		},
		updateEvent = function (e, data) {
			calendar.fullCalendar("removeEvents", data[0].id);
			return renderEvent(data);
		},
		// dragged/resized events
		moveEvent = function (e, theaction) {
			$.post(ajaxurl, { action: 'move_event', 'event': e }, function (data) {
				if (data) {
					data.start = toUnixDate(e.start);
					data.end = toUnixDate(e.end);
					updateEvent(e, data);
					$.jGrowl('<strong>' + e.title + '</strong> ' + custom.has_been_modified, { header: custom.success });
				}
			});
		},
		checkAllDay = function () {
			var	allDay = ($('#allDay').attr('checked')) ? 1 : 0;
			if (allDay) {
				$.timePicker("#start_time").setTime(new Date(0, 0, 0, 0, 0, 0));
				$.timePicker("#end_time").setTime(new Date(0, 0, 0, 0, 0, 0));
			} else {
				$.timePicker("#start_time").setTime(new Date(0, 0, 0, 8, 0, 0));
				$.timePicker("#end_time").setTime(new Date(0, 0, 0, 10, 0, 0));
			}
		},
		checkRepeat = function () {
			var repeat = $('#repeat_freq').val();
			if (repeat > 0) {
				$('#repeat_int, #repeat_label, #repeat_end').fadeIn(250);
			} else {
				$('#repeat_int, #repeat_label, #repeat_end').fadeOut(250);
			}
		},
		validateForm = function (err) {
			if (undefined === err) { 
				err = false;
			}
			var	required = custom.required_fields.split(",");	// convert required fields string into array
			
			// no required fields
			if (!required.length) {
				return;
			}

			// process required fields
			$.each(required, function (index, value) {
				$('#' + value).parent().find('label').addClass('required');
				if ($('#' + this).val() === '') {
					$('#' + this).addClass('aec-error');
					err = true;
				} else {
					$('#' + this).removeClass('aec-error');
				}
			});

			if (err) {
				$('.button-primary').attr('disabled', 'disabled');
				return false;
			}
			$('.button-primary').removeAttr('disabled');
			return true;
		},
		// convert dates for duration processing
		convertDate = function (datetime) {
			dt		= datetime.split(' ');
			date	= dt[0];
			time	= dt[1];
			if (!custom.is24HrTime) {
				ampm	= dt[2];
			}
			// US date format
			if (date.indexOf('/') >= 0) {
				dateparts	= date.split('/');
				month		= dateparts[0];
				day			= dateparts[1];
			}
			// European date format
			if (date.indexOf('-') >= 0) {
				dateparts	= date.split('-');
				day			= dateparts[0];
				month		= dateparts[1];
			}
			year			= dateparts[2];
			if (undefined !== time) {
				hours	= time.substr(0, 2);
				minutes	= time.substr(3, 2);
				if (!custom.is24HrTime) {
					if (hours == 12) {
						hours = 0;
					}
					if (ampm == 'PM') {
						hours = 12 + parseInt(hours, 10);
					}
				}
				if (hours == 24) {
					hours = 0;
				}
				return month + '/' + day + '/' + year + ' ' + hours + ':' + minutes + ':' + '00';
			}
			return month + '/' + day + '/' + year;
		},
		js_n = function (arr, quantity, singular, plural, min) {	// javascript _n method
			if (undefined === min) {
				min = 0;
			}
			if (quantity > 0) {
				var out = [],
					output = [];
				if (quantity > min) {
					out.push(quantity);
				}
				out.push((quantity != 1) ? plural : singular);
				output = out.join(' ');
				arr.push(output);
			}
			return;
		},
		calcDuration = function (from, to, allDay) {
			from = convertDate(from);
			to = convertDate(to);
			var mills	= new Date(to).getTime() - new Date(from).getTime(),
				diff	= {},
				out		= [];
			diff.weeks = Math.floor(mills / 604800000);
			mills -= diff.weeks * 604800000;
			diff.days = Math.floor(mills / 86400000);
			mills -= diff.days * 86400000;
			diff.hours = Math.floor(mills / 3600000);
			mills -= diff.hours * 3600000;
			diff.minutes = Math.floor(mills / 60000);

			// format output
			if (allDay == 1) {
				diff.days += 1;
			}
			js_n(out, diff.weeks, custom.week, custom.weeks);
			js_n(out, diff.days, custom.day, custom.days);
			if (allDay == 0) {
				js_n(out, diff.hours, custom.hour, custom.hours);
				js_n(out, diff.minutes, custom.minute, custom.minutes);
			}
			return out.join(', ');
		},
		checkDuration = function () {
			var	allDay	= ($('#allDay').attr('checked')) ? 1 : 0,
				from	= $('#start_date').val(),
				to		= $('#end_date').val(),
				start	= $('#start_time').val(),
				end		= $('#end_time').val(),
				until	= $('#repeat_end').val();
			if (allDay) {
				$('#start_time, #end_time').fadeOut(250).attr("disabled", "disabled");
			} else {
				$('#start_time, #end_time').fadeIn(250).removeAttr("disabled");
				from = Date.parse(from);
				to = Date.parse(to);
				if (from > to) {
					$('#start_date, #end_date').addClass('aec-error');
					$('.duration').html(custom.error_invalid_duration);
					validateForm(true);
					return;
				} else if (to > until) {
					$('#repeat_end').addClass('aec-error');
					validateForm(true);
					return;
				} else if (from === to) {
					start	= $.timePicker('#start_time').getTime();
					end		= $.timePicker('#end_time').getTime();
					if (start >= end) {
						$('#start_time, #end_time').addClass('aec-error');
						$('.duration').html(custom.error_invalid_duration);
						validateForm(true);
						return;
					}
					$('#start_date, #end_date, #start_time, #end_time').removeClass('aec-error');
				}
				from	= $('#start_date').val() + ' ' + $('#start_time').val();
				to		= $('#end_date').val() + ' ' + $('#end_time').val();
				$('#start_time, #end_time').removeClass('aec-error');
				validateForm(false);
			}
			$('.duration').html(calcDuration(from, to, allDay));
		},
		roundUp = function (date) {
			var inc = 1800000; // 30 minutes
			return new Date(inc * Math.ceil(date / inc));
		},
		eventDialog = function (e, actionTitle) {
			var ev					= e,
				modal				= '<div id="aec-modal"><div class="aec-title"></div><div class="aec-content"></div></div>',
				wpadminbar			= $('#wpadminbar'),
				wpadminbar_height	= (wpadminbar.length > 0) ? wpadminbar.height() : '0';	// adjusts modal top for WordPress admin bar
			// check for modal, if not present add it to the DOM
			if ($('#aec-modal').length === 0) {
				$('body').prepend(modal);
			}

			// modal window controls
			$('#aec-modal').modal({
				overlayId: 'aec-modal-overlay',
				containerId: 'aec-modal-container',
				closeHTML: '<div class="close"><a href="#" class="simplemodal-close" title="' + custom.close_event_form + '">x</a></div>',
				minHeight: 35,
				opacity: 65,
				zIndex: 10000,
				position: [wpadminbar_height, ],
				overlayClose: true,
				onOpen: function (d) {
					var modal = this;
					modal.container = d.container[0];
					d.overlay.fadeIn(150, function () {
						$('#aec-modal', modal.container).show();
						var title		= $('div.aec-title', modal.container),
							content		= $('div.aec-content', modal.container),
							closebtn	= $('div.close', modal.container);
						title.html(custom.loading_event_form).show();
						d.container.slideDown(150, function () {
							content.load(ajaxurl, { action: 'admin_event', 'event': e }, function () {
								title.html(actionTitle);
								var h = content.height() + title.height() + 30;
								d.container.animate({ height: h }, 250, function () {
									closebtn.show();
									content.show();

									// execute modal window event handlers
									if ($('#start_time').length > 0) {
										var times = $('#start_time, #end_time').timePicker({
											step: parseInt(custom.step_interval, 10),
											show24Hours: custom.is24HrTime,
											separator: ':'
										});
										
										// toggle weekends
										if (custom.show_weekends === '0') {
											$.datepicker.setDefaults({'beforeShowDay': $.datepicker.noWeekends});
										}
										
										// localize datepicker
										$.datepicker.setDefaults($.datepicker.regional[custom.locale]);

										var repeat_end = $('#repeat_end').datepicker({
											changeMonth: true,
											changeYear: true,
											dateFormat: custom.datepicker_format,
											firstDay: custom.start_of_week,
											showButtonPanel: false,
											showOtherMonths: true,
											selectOtherMonths: true,
											beforeShow: function (selectedDate) {
												var min = $('#end_date').datepicker('getDate');
												repeat_end.datepicker('option', {minDate: min});
											}
										});
										
										var dates = $('#start_date, #end_date').datepicker({
											dateFormat: custom.datepicker_format,
											firstDay: custom.start_of_week,
											showButtonPanel: true,
											showOtherMonths: true,
											selectOtherMonths: true,
											onSelect: function (selectedDate) {
												var option		= (this.id === 'start_date') ? 'minDate' : 'maxDate',
													instance	= $(this).data('datepicker'),
													repeat		= repeat_end.datepicker('getDate'),
													end_date	= $('#end_date').datepicker('getDate'),
													date		= $.datepicker.parseDate(instance.settings.dateFormat ||
																$.datepicker._defaults.dateFormat, selectedDate, instance.settings);
												dates.not(this).datepicker('option', option, date);
												if (repeat < end_date) {
													repeat_end.datepicker('setDate', end_date);
													$('#repeat_freq').val(0);
													checkRepeat();
												}
												checkDuration();
											}
										});
										
										// toggle limit
										if (custom.limit === '1') {
											dates.datepicker("option", "minDate", "0");
											repeat_end.datepicker("option", "minDate", "0");
										}

										validateForm();
										checkRepeat();
										checkDuration();

										$('#allDay').change(function () {
											checkAllDay();
										});

										$('#repeat_freq').change(function () {
											checkRepeat();
										});

										$('#start_date, #end_date, #start_time, #end_time, #allDay').change(function () {
											checkDuration();
										});

										$('.required').parent().find('input, textarea').keyup(function () {
											validateForm();
										});

										$('#cancel_event').click(function (e) {
											e.preventDefault();
											$('.time-picker').remove();
											$.modal.close();
										});

										$('#add_event').click(function (e) {
											e.preventDefault();
											if (!validateForm()) {
												return;
											}
											var viewparams = '&view_start=' + encodeURIComponent(ev.viewStart) +
															 '&view_end=' + encodeURIComponent(ev.viewEnd),
												formfields = $('#event-form').serialize() + viewparams;
											$.post(ajaxurl, { action: 'add_event', 'event': formfields }, function (data) {
												if (data) {
													title = renderEvent(data);
													$.jGrowl('<strong>' + title + '</strong> ' + custom.has_been_created, { header: custom.success });
												}
											}, 'json');
											$('.time-picker').remove();
											$.modal.close();
										});
										
										$('#copy_event').click(function (e) {
											e.preventDefault();
											if (!validateForm()) {
												return;
											}
											var viewparams = '&view_start=' + encodeURIComponent(ev.viewStart) +
															 '&view_end=' + encodeURIComponent(ev.viewEnd),
												formfields = $('#event-form').serialize() + viewparams;
											$.post(ajaxurl, { action: 'copy_event', 'event': formfields }, function (data) {
												if (data) {
													title = renderEvent(data);
													$.jGrowl('<strong>' + title + '</strong> ' + custom.has_been_created, { header: custom.success });
												}
											}, 'json');
											$('.time-picker').remove();
											$.modal.close();
										});

										$('#update_event').click(function (e) {
											e.preventDefault();
											if (!validateForm()) { 
												return;
											}
											var viewparams = '&view_start=' + encodeURIComponent(ev.viewStart) +
															 '&view_end=' + encodeURIComponent(ev.viewEnd),
												formfields = $('#event-form').serialize() + viewparams;
											$.post(ajaxurl, { action: 'update_event', 'event': formfields }, function (data) {
												if (data) {
													var e	= $('#aec-calendar').fullCalendar('clientEvents', data.id)[0];
													title	= updateEvent(e, data);
													$.jGrowl('<strong>' + title + '</strong> ' + custom.has_been_modified, { header: custom.success });
												}
											}, 'json');
											$('.time-picker').remove();
											$.modal.close();
										});

										$('#delete_event').click(function (e) {
											e.preventDefault();
											var id		= $('#id').val(),
												title	= $('#title').val();
											if (confirm(custom.delete_event)) {
												$.post(ajaxurl, { action: 'delete_event', 'id': id }, function (data) {
													if (data) {
														$('#aec-calendar').fullCalendar('removeEvents', id);
														$.jGrowl('<strong>' + title + '</strong> ' + custom.has_been_deleted, { header: custom.success });
														$('.time-picker').remove();
														$.modal.close();
													}
												});
											}
										});
									}
								});
							}, 'json');
						});
					});
				},
				onClose: function (d) {
					var modal = this;
					d.container.animate({ top: '-' + (d.container.height() + 20) }, 350, function () {
						$('.time-picker').remove();
						modal.close();
					});
				}
			});
		},
		calendarInit = function () {
			var d			= new Date(),
				now			= d.getTime(),
				twoHours	= (7200000),	// milliseconds
				today		= new Date(d.getFullYear(), d.getMonth(), d.getDate());
			calendar	= $('#aec-calendar').fullCalendar({
				isRTL: (custom.is_rtl === '1') ? true : false,
				monthNames: [custom.january, custom.february, custom.march, custom.april, custom.may, custom.june, custom.july,
							 custom.august, custom.september, custom.october, custom.november, custom.december],
				monthNamesShort: [custom.jan, custom.feb, custom.mar, custom.apr, custom.may_short, custom.jun, custom.jul, custom.aug,
								custom.sep, custom.oct, custom.nov, custom.dec],
				dayNames: [custom.sunday, custom.monday, custom.tuesday, custom.wednesday, custom.thursday, custom.friday, custom.saturday],
				dayNamesShort: [custom.sun, custom.mon, custom.tue, custom.wed, custom.thu, custom.fri, custom.sat],
				buttonIcons: false,
				buttonText: {
					today: custom.today,
					month: custom.month,
					week: custom.week,
					day: custom.day,
					prev: '&nbsp;&#9668;&nbsp;',  // left triangle
					next: '&nbsp;&#9658;&nbsp;'  // right triangle
				},
				aspectRatio: 2,
				allDayText: custom.all_day,
				timeFormat: {
					agenda: custom.agenda_time_format,
					'': custom.other_time_format
				},
				columnFormat: {
					week: 'ddd d',
					month: 'ddd'
				},
				axisFormat: custom.axis_time_format,
				firstDay: custom.start_of_week,
				firstHour: 8,
				weekMode: 'liquid',
				weekends: (custom.show_weekends === '1') ? true : false,
				eventRender: function (e, element) {
					// check if filter is active
					if (isFilter) {
						var filter = $('#aec-filter li.active').children();
						// if filter is not "all", hide all category types other than the selected
						if (!filter.hasClass('all') && !filter.hasClass(e.className[0])) {
							element.hide();
						}
					}
				},
				events: {
					url: ajaxurl,
					data: { action: 'get_events' },
					type: 'POST'
				},
				header: {
					left: 'prev,next, today',
					center: 'title',
					right: 'month,agendaWeek'
				},
				editable: custom.editable,
				selectable: custom.editable,
				selectHelper: custom.editable,
				dragOpacity: 0.3,
				lazyFetching: false,
				loading: function (b) {
					if (b) { 
						$.jGrowl(custom.loading, {sticky: true});
					} else {
						$('#jGrowl').jGrowl('close');
					}
				},
				//eventMouseover: function(e, js, view){
				//},
				//viewDisplay: function(view){
				//},
				eventClick: function (e, js, view) {
					if ($(this).hasClass('fc-event-disabled')) {
						$.jGrowl(custom.error_no_rights, {header: custom.whoops});
						return;
					}
					eventtime = (e.end === null) ? e.start : e.end;
					if (custom.limit === '1' && custom.admin === '0' && eventtime < now) {
						$.jGrowl(custom.error_past_edit, {header: custom.whoops});
						return;
					}
					e.viewStart	= toUnixDate(view.visStart);
					e.viewEnd	= toUnixDate(view.visEnd);
					eventDialog(e, custom.edit_event);
				},
				select: function (start, end, allDay, js, view) {
					if (custom.limit === '1') {
						if (start < today || (start < now && view.name !== 'month')) {
							$.jGrowl(custom.error_past_create, { header: custom.whoops });
							return false;
						// create event that starts as much as 30 minutes from now, and ends two hours later
						} else if (start < now) {
							start	= roundUp(now);
							end		= roundUp(now + twoHours);
							allDay	= false;
						}
					}
					var e		= {};
					e.start		= toUnixDate(start);
					e.end		= toUnixDate(end);
					e.allDay	= (allDay) ? 1 : 0;
					e.viewStart	= toUnixDate(view.visStart);
					e.viewEnd	= toUnixDate(view.visEnd);
					eventDialog(e, custom.add_event);
				},
				eventResize: function (e, dayDelta, minuteDelta, revertFunc, js, ui, view) {
					eventtime	= (e.end === null) ? e.start : e.end;
					if (custom.limit === '1' && custom.admin === '0' && eventtime < now) {
						$.jGrowl(custom.error_past_resize, { header: custom.whoops });
						revertFunc();
						return false;
					}
					e.end			= (e.end === null) ? e.start : e.end;
					e.resize		= 1;
					e.dayDelta		= dayDelta;
					e.minuteDelta	= minuteDelta;
					e.view_start	= toUnixDate(view.visStart);
					e.view_end		= toUnixDate(view.visEnd);
					moveEvent(e);
				},
				eventDrop: function (e, dayDelta, minuteDelta, allDay, revertFunc, js, ui, view) {
					if (custom.limit === '1' && custom.admin === '0' && e.start < now) {
						$.jGrowl(custom.error_past_move, { header: custom.whoops });
						revertFunc();
						return;
					}
					e.allDay		= (allDay) ? 1 : 0;
					e.resize		= '';
					e.dayDelta		= dayDelta;
					e.minuteDelta	= minuteDelta;
					e.view_start	= toUnixDate(view.visStart);
					e.view_end		= toUnixDate(view.visEnd);
					moveEvent(e);
				}
			});
			// initialize filter: activate all
			if (isFilter) {
				filter($('#aec-filter .all'));
			}
		},
		aec_init = function () {
			$.jGrowl.defaults.closerTemplate = '<div>' + custom.hide_all_notifications + '</div>';
			$.jGrowl.defaults.position = (custom.is_rtl === '1') ? 'bottom-left' : 'bottom-right';

			isFilter = ($('#aec-filter li a').length > 0);
			calendarInit();
			eventHandlers();
		};

	aec_init();
});