'use strict';

/*
 *+------------------------------------------------------------------------+
 *| Licensed Materials - Property of IBM
 *| IBM Cognos Products: BI Dashboard
 *| (C) Copyright IBM Corp. 2016, 2017
 *|
 *| US Government Users Restricted Rights - Use, duplication or disclosure
 *| restricted by GSA ADP Schedule Contract with IBM Corp.
 *+------------------------------------------------------------------------+
 */

define(['jquery', 'underscore', '../../../lib/@waca/core-client/js/core-client/ui/core/Class', '../../../lib/@waca/upgrades/UpgradeBase'], function ($, _, Class, UpgradeBase) {

	var Upgrade = Class.extend([UpgradeBase], {
		init: function init() {
			this.VERSION = 9;
		},

		/**
   * Perform upgrade
   *
   * @param {object} spec - spec to perform upgrade on
   *
   * @return {Promise} Promise to be resolved when upgrade performed
   */
		up: function up(spec) {
			if (!spec) {
				return Promise.resolve(spec);
			}

			this.moveTransparencyToLayoutModel(spec);
			this.fixTextAutosize(spec);
			return Promise.resolve(spec);
		},

		moveTransparencyToLayoutModel: function moveTransparencyToLayoutModel(boardSpec) {
			if (boardSpec && boardSpec.widgets) {
				var widgetIds = _.keys(boardSpec.widgets);
				_.each(widgetIds, function (widgetId) {
					var layoutSpec = this._findLayoutSpecById(boardSpec.layout, widgetId);
					var widget = boardSpec.widgets[widgetId];
					if (layoutSpec && typeof widget.transparency !== 'undefined') {
						if (!layoutSpec.style) {
							layoutSpec.style = {};
						}
						if (typeof layoutSpec.style.opacity === 'undefined') {
							layoutSpec.style.opacity = widget.transparency;
						}
						delete widget.transparency;
					}
					// transparency now stored on a different node, remove it from existing dashboards/stories on load.
					if (widget && widget.content) {
						widget.content = this._removeOpacity(widget.content);
					}
				}.bind(this));
			}
		},

		_findLayoutSpecById: function _findLayoutSpecById(layoutSpec, id) {
			var spec;
			if (layoutSpec.id === id) {
				spec = layoutSpec;
			}
			if (!spec && layoutSpec.items) {
				for (var i = 0; !spec && i < layoutSpec.items.length; i++) {
					spec = this._findLayoutSpecById(layoutSpec.items[i], id);
				}
			}
			return spec;
		},

		_removeOpacity: function _removeOpacity(content) {
			var contentWithoutOpacity = content.replace(RegExp('[ ]*opacity:[ ]*[0-9.]+[ ]*;?[ ]*'), '');
			// remove empty style attributes
			contentWithoutOpacity = contentWithoutOpacity.replace(RegExp('[ ]?style=""'), '');
			return contentWithoutOpacity;
		},

		fixTextAutosize: function fixTextAutosize(boardSpec) {
			if (boardSpec && boardSpec.widgets) {
				_.each(boardSpec.widgets, function (widget) {
					// remove any font-size styles if isResponsive is true
					if (widget && widget.content && widget.type === 'text' && widget.isResponsive) {
						var $content = $(widget.content);
						$content.find('[style*="font-size"]').css('font-size', '');
						widget.content = $content[0].outerHTML;
					}
				});
			}
		},

		down: function down(spec) {
			// no downgrade at this time; return as is
			return Promise.resolve(spec);
		}
	});

	return new Upgrade();
});
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