/*
* tablesaw: A set of plugins for responsive tables
* Stack: switches from column layout to rows with inline labels
* Copyright (c) 2013 Filament Group, Inc.
* MIT License
*/

(function() {
	var classes = {
		stackTable: "tablesaw-stack",
		cellLabels: "tablesaw-cell-label",
		cellContentLabels: "tablesaw-cell-content"
	};

	var data = {
		key: "tablesaw-stack"
	};

	var attrs = {
		labelless: "data-tablesaw-no-labels",
		hideempty: "data-tablesaw-hide-empty"
	};

	var Stack = function(element, tablesaw) {
		this.tablesaw = tablesaw;
		this.$table = $(element);

		this.labelless = this.$table.is("[" + attrs.labelless + "]");
		this.hideempty = this.$table.is("[" + attrs.hideempty + "]");

		this.$table.data(data.key, this);
	};

	Stack.prototype.init = function() {
		this.$table.addClass(classes.stackTable);

		if (this.labelless) {
			return;
		}

		var self = this;

		this.$table
			.find("th, td")
			.filter(function() {
				return !$(this).closest("thead").length;
			})
			.filter(function() {
				return (
					!$(this)
						.closest("tr")
						.is("[" + attrs.labelless + "]") &&
					(!self.hideempty || !!$(this).html())
				);
			})
			.each(function() {
				var $newHeader = $(document.createElement("b")).addClass(classes.cellLabels);
				var $cell = $(this);

				$(self.tablesaw._findPrimaryHeadersForCell(this)).each(function(index) {
					var $header = $(this.cloneNode(true));
					// TODO decouple from sortable better
					// Changed from .text() in https://github.com/filamentgroup/tablesaw/commit/b9c12a8f893ec192830ec3ba2d75f062642f935b
					// to preserve structural html in headers, like <a>
					var $sortableButton = $header.find(".tablesaw-sortable-btn");
					$header.find(".tablesaw-sortable-arrow").remove();

					// TODO decouple from checkall better
					var $checkall = $header.find("[data-tablesaw-checkall]");
					$checkall.closest("label").remove();
					if ($checkall.length) {
						$newHeader = $([]);
						return;
					}

					if (index > 0) {
						$newHeader.append(document.createTextNode(", "));
					}
					$newHeader.append(
						$sortableButton.length ? $sortableButton[0].childNodes : $header[0].childNodes
					);
				});

				if ($newHeader.length && !$cell.find("." + classes.cellContentLabels).length) {
					$cell.wrapInner("<span class='" + classes.cellContentLabels + "'></span>");
				}

				// Update if already exists.
				var $label = $cell.find("." + classes.cellLabels);
				if (!$label.length) {
					$cell.prepend($newHeader);
				} else {
					// only if changed
					$label.replaceWith($newHeader);
				}
			});
	};

	Stack.prototype.destroy = function() {
		this.$table.removeClass(classes.stackTable);
		this.$table.find("." + classes.cellLabels).remove();
		this.$table.find("." + classes.cellContentLabels).each(function() {
			$(this).replaceWith(this.childNodes);
		});
	};

	// on tablecreate, init
	$(document)
		.on(Tablesaw.events.create, function(e, tablesaw) {
			if (tablesaw.mode === "stack") {
				var table = new Stack(tablesaw.table, tablesaw);
				table.init();
			}
		})
		.on(Tablesaw.events.refresh, function(e, tablesaw) {
			if (tablesaw.mode === "stack") {
				$(tablesaw.table)
					.data(data.key)
					.init();
			}
		})
		.on(Tablesaw.events.destroy, function(e, tablesaw) {
			if (tablesaw.mode === "stack") {
				$(tablesaw.table)
					.data(data.key)
					.destroy();
			}
		});

	Tablesaw.Stack = Stack;
})();