(function($) {

	$.fn.actions = function(opts) {

		var options = $.extend({}, $.fn.actions.defaults, opts);

		var actionCheckboxes = $(this);

		var list_editable_changed = false;

		checker = function(checked) {

			if (checked) {

				showQuestion();

			} else {

				reset();

			}

			$(actionCheckboxes).attr("checked", checked)

				.parent().parent().toggleClass(options.selectedClass, checked);

		}

		updateCounter = function() {

			var sel = $(actionCheckboxes).filter(":checked").length;

			$(options.counterContainer).html(interpolate(

			ngettext('%(sel)s of %(cnt)s selected', '%(sel)s of %(cnt)s selected', sel), {

				sel: sel,

				cnt: _actions_icnt

			}, true));

			$(options.allToggle).attr("checked", function() {

				if (sel == actionCheckboxes.length) {

					value = true;

					showQuestion();

				} else {

					value = false;

					clearAcross();

				}

				return value;

			});

		}

		showQuestion = function() {

			$(options.acrossClears).hide();

			$(options.acrossQuestions).show();

			$(options.allContainer).hide();

		}

		showClear = function() {

			$(options.acrossClears).show();

			$(options.acrossQuestions).hide();

			$(options.actionContainer).toggleClass(options.selectedClass);

			$(options.allContainer).show();

			$(options.counterContainer).hide();

		}

		reset = function() {

			$(options.acrossClears).hide();

			$(options.acrossQuestions).hide();

			$(options.allContainer).hide();

			$(options.counterContainer).show();

		}

		clearAcross = function() {

			reset();

			$(options.acrossInput).val(0);

			$(options.actionContainer).removeClass(options.selectedClass);

		}

		// Show counter by default

		$(options.counterContainer).show();

		// Check state of checkboxes and reinit state if needed

		$(this).filter(":checked").each(function(i) {

			$(this).parent().parent().toggleClass(options.selectedClass);

			updateCounter();

			if ($(options.acrossInput).val() == 1) {

				showClear();

			}

		});

		$(options.allToggle).show().click(function() {

			checker($(this).attr("checked"));

			updateCounter();

		});

		$("div.actions span.question a").click(function(event) {

			event.preventDefault();

			$(options.acrossInput).val(1);

			showClear();

		});

		$("div.actions span.clear a").click(function(event) {

			event.preventDefault();

			$(options.allToggle).attr("checked", false);

			clearAcross();

			checker(0);

			updateCounter();

		});

		lastChecked = null;

		$(actionCheckboxes).click(function(event) {

			if (!event) { var event = window.event; }

			var target = event.target ? event.target : event.srcElement;

			if (lastChecked && $.data(lastChecked) != $.data(target) && event.shiftKey == true) {

				var inrange = false;

				$(lastChecked).attr("checked", target.checked)

					.parent().parent().toggleClass(options.selectedClass, target.checked);

				$(actionCheckboxes).each(function() {

					if ($.data(this) == $.data(lastChecked) || $.data(this) == $.data(target)) {

						inrange = (inrange) ? false : true;

					}

					if (inrange) {

						$(this).attr("checked", target.checked)

							.parent().parent().toggleClass(options.selectedClass, target.checked);

					}

				});

			}

			$(target).parent().parent().toggleClass(options.selectedClass, target.checked);

			lastChecked = target;

			updateCounter();

		});

		$('form#changelist-form table#result_list tr').find('td:gt(0) :input').change(function() {

			list_editable_changed = true;

		});

		$('form#changelist-form button[name="index"]').click(function(event) {

			if (list_editable_changed) {

				return confirm(gettext("You have unsaved changes on individual editable fields. If you run an action, your unsaved changes will be lost."));

			}

		});

		$('form#changelist-form input[name="_save"]').click(function(event) {

			var action_changed = false;

			$('div.actions select option:selected').each(function() {

				if ($(this).val()) {

					action_changed = true;

				}

			});

			if (action_changed) {

				if (list_editable_changed) {

					return confirm(gettext("You have selected an action, but you haven't saved your changes to individual fields yet. Please click OK to save. You'll need to re-run the action."));

				} else {

					return confirm(gettext("You have selected an action, and you haven't made any changes on individual fields. You're probably looking for the Go button rather than the Save button."));

				}

			}

		});

	}

	/* Setup plugin defaults */

	$.fn.actions.defaults = {

		actionContainer: "div.actions",

		counterContainer: "span.action-counter",

		allContainer: "div.actions span.all",

		acrossInput: "div.actions input.select-across",

		acrossQuestions: "div.actions span.question",

		acrossClears: "div.actions span.clear",

		allToggle: "#action-toggle",

		selectedClass: "selected"

	}

})(django.jQuery);