function events_calendar() {
	$("#calendar .month").attr("tabindex", "-1").removeClass("found").removeClass("on").attr('aria-disabled', true);

	if ($("#directory .event.on").length) {
		$("#calendar .month").each(function () {
			var match = $(this);
			var month = $(this).data("month");

			$("#directory .event.on").each(function () {
				if ($(this).data("date") && $(this).data("date").trim().substring(5, 7) == month) {
					$(match).attr("tabindex", "0").addClass("found").attr('aria-disabled', false);

					return false;
				}
			});
		});
	}
}

function events_count() {
	$("#options [role='checkbox']").attr("aria-checked", false);
	$("#options [role='checkbox'].on").attr("aria-checked", true);

	var match = $("#directory .event.on:not(.hidden)").length;

	if (match === 0) {
		$("#info .count-plural").show();
	}
	else if (match === 1) {
		$("#info .count-plural").hide();
	}
	else {
		$("#info .count-plural").show();
	}

	$("#info .count-found").html(match);
	$("#info .count-possible").html($("#directory .event").length);
}

function events_filter() {
	if ($("#options .button.on").length) {
		$("#info .button.clear").show();
		$("#info .button.filter").addClass("on");

		$("#directory .event").removeClass("on").removeClass("hidden").each(function () {
			var flow = [];
			var tags = $(this).find(".meta-tags p").text().replace(/, /g, ",").split(",");

			$("#options .buttons").each(function () {
				var mode = -1;

				$(this).find(".button.on").each(function () {
					mode = 0;

					if ($.inArray($(this).text(), tags) !== -1) {
						mode = 1;

						return false;
					}
				});

				flow.push(mode);
			});

			if ($.inArray(0, flow) === -1) {
				$(this).addClass("on");
			}
		});

		$("#applied span").text($("#options .button.on").map(function () {
			return $(this).text();
		}).get().join(", "));
	}
	else {
		$("#info .button.clear").hide();
		$("#info .button.filter").removeClass("on");
		$("#directory .event").addClass("on").removeClass("hidden");
		$("#applied span").text("None");
	}

	events_calendar();
	events_count();
}

function events_hash() {
	var hash = "#";

	$("#options .button.on").each(function (index) {
		if (index) {
			hash += "+";
		}

		hash += $(this).text().replace(/ /g, "_");
	});

	if (history.pushState) {
		if (hash === "#") {
			hash = ".";
		}

		history.pushState(null, null, hash);
	}
	else {
		window.location.hash = hash;
	}

	events_filter();
}

function events_load() {
	if (window.location.hash) {
		var hash = window.location.hash.replace("#", "").replace(/_/g, " ").split("+");

		for (var button in hash) {
			$("#options .button").filter(function () {
				return $(this).text() === hash[button];
			})
				.addClass("on");
		}
	}

	events_filter();
	events_sort();
}

function events_month() {
	if ($("#calendar .month.on").length) {
		var month = $("#calendar .month.on").data("month");

		$("#directory .event.on").removeClass("hidden").each(function () {
			if (!$(this).data("date") || $(this).data("date").trim().substring(5, 7) != month) {
				$(this).addClass("hidden");
			}
		});
	}
	else {
		$("#directory .event.on").removeClass("hidden");
	}

	events_count();

	setTimeout(function () { $("#info .message").focus(); }, 300);
}

function events_sort() {
	function date(sort, direction) {
		$(sort).sort(function (a, b) {
			if (direction === "asc") {
				return $(a).data("date") > $(b).data("date") ? 1 : -1;
			}
			else {
				return $(a).data("date") < $(b).data("date") ? 1 : -1;
			}
		})
			.appendTo($("#directory"));
	}

	function name(sort, direction) {
		$(sort).sort(function (a, b) {
			if (direction === "asc") {
				return $(a).find("h3").text() > $(b).find("h3").text() ? 1 : -1;
			}
			else {
				return $(a).find("h3").text() < $(b).find("h3").text() ? 1 : -1;
			}
		})
			.appendTo($("#directory"));
	}

	var direction = $("#options .dropdown .option.on").data("direction");

	if ($("#options .dropdown .option.on").data("sort") === "date") {
		date($("#directory .event.pin[data-date]"), direction);
		name($("#directory .event.pin:not([data-date])"), direction);
		date($("#directory .event:not(.pin)[data-date]"), direction);
		name($("#directory .event:not(.pin):not([data-date])"), direction);
	}
	else {
		name($("#directory .event.pin"), direction);
		name($("#directory .event:not(.pin)"), direction);
	}
}

$(document).ready(function () {
	$(this).on("click", "#calendar .month.found", function () {
		$(this).toggleClass("on").siblings().removeClass("on");

		events_month();
	});

	$(this).on("click", "#directory .event a[aria-disabled]", function () {
		return false;
	});

	$(this).on("click", "#directory .event", function () {
		window.open($(this).find("a").attr("href"), "_blank");
	});

	$(this).on("click", "#info .button.clear", function () {
		if (history.pushState) {
			history.pushState(null, null, ".");
		}
		else {
			window.location.hash = events_hash;
		}

		$("#options .button").removeClass("on");

		events_filter();

		setTimeout(function () { $("#mainContent").focus(); }, 300);
	});

	$(this).on("click", "#info .button.filter", function () {
		$("#options").stop().slideToggle(300);
	});

	$(this).on("click", "#options .button", function () {
		$(this).toggleClass("on");

		events_hash();

		setTimeout(function () { $("#info .message").focus(); }, 300);
	});

	$(this).on("click", "#options .dropdown .name", function () {
		$(this).parent().toggleClass("on").find(".options").stop().slideToggle(300);
	});

	$(this).on("click", "#options .dropdown .option:not(.on)", function () {
		$(this).addClass("on").siblings().removeClass("on");
		$(this).parent().siblings(".name").click().text($(this).text());

		events_sort();

		setTimeout(function () { $("#dateFilter").focus(); }, 300);
	});

	$(this).on("keypress", "[tabindex]", function (event) {
		if (event.which === 13 || event.which === 32) {
			$(this).click();
		}
	});

	events_load();
});