/*
* tablesaw: A set of plugins for responsive tables
* minimap: a set of dots to show which columns are currently visible.
* Copyright (c) 2013 Filament Group, Inc.
* MIT License
*/

(function() {
	var MiniMap = {
		attr: {
			init: "data-tablesaw-minimap"
		},
		show: function(table) {
			var mq = table.getAttribute(MiniMap.attr.init);

			if (mq === "") {
				// value-less but exists
				return true;
			} else if (mq && "matchMedia" in window) {
				// has a mq value
				return window.matchMedia(mq).matches;
			}

			return false;
		}
	};

	function createMiniMap($table) {
		var tblsaw = $table.data("tablesaw");
		var $btns = $('<div class="tablesaw-advance minimap">');
		var $dotNav = $('<ul class="tablesaw-advance-dots">').appendTo($btns);
		var hideDot = "tablesaw-advance-dots-hide";
		var $headerCells = $table.data("tablesaw")._getPrimaryHeaderCells();

		// populate dots
		$headerCells.each(function() {
			$dotNav.append("<li><i></i></li>");
		});

		$btns.appendTo(tblsaw.$toolbar);

		function showHideNav() {
			if (!MiniMap.show($table[0])) {
				$btns.css("display", "none");
				return;
			}
			$btns.css("display", "block");

			// show/hide dots
			var dots = $dotNav.find("li").removeClass(hideDot);
			$table.find("thead th").each(function(i) {
				if ($(this).css("display") === "none") {
					dots.eq(i).addClass(hideDot);
				}
			});
		}

		// run on init and resize
		showHideNav();
		$(window).on(Tablesaw.events.resize, showHideNav);

		$table
			.on("tablesawcolumns.minimap", function() {
				showHideNav();
			})
			.on(Tablesaw.events.destroy + ".minimap", function() {
				var $t = $(this);

				tblsaw.$toolbar.find(".tablesaw-advance").remove();
				$(window).off(Tablesaw.events.resize, showHideNav);

				$t.off(".minimap");
			});
	}

	// on tablecreate, init
	$(document).on(Tablesaw.events.create, function(e, tablesaw) {
		if (
			(tablesaw.mode === "swipe" || tablesaw.mode === "columntoggle") &&
			tablesaw.$table.is("[ " + MiniMap.attr.init + "]")
		) {
			createMiniMap(tablesaw.$table);
		}
	});

	// TODO OOP this better
	Tablesaw.MiniMap = MiniMap;
})();