'use strict';

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

/**
 * Licensed Materials - Property of IBM
 * IBM Cognos Products: Dashboard
 * (C) Copyright IBM Corp. 2018, 2020
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 *
 */
define(['underscore', './SummaryTypes', './SummaryQueryResult', '../../../widgets/livewidget/nls/StringResources', '../../../filters/FilterSpecHelper'], function (_, SummaryTypes, SummaryQueryResult, StringResources, FilterSpecHelper) {
	'use strict';

	var OVERALL_SUMMARY_QUERY_KEY = '_overallSummaryQueryKey';

	/**
  * The current implementation requires a summary query for each summary set which may introduce performance issues.
  * Add limit to restrict number of queries until we can send the summary queries together
  */
	var NESTED_ITEM_LIMIT = 12;

	/**
  * @class SummaryFeature
  * Summary feature to run query for a visualization,
  * based on different combination of projections and query context.
  */

	var SummaryFeature = function () {
		function SummaryFeature(_ref) {
			var content = _ref.content,
			    features = _ref.features;

			_classCallCheck(this, SummaryFeature);

			// Local object to store category and measure data item unique ids.
			// Used to build summary query projections and query UIs to get summary result.
			this._oQueryProjectionObj = {};

			// Object to store summary query result and is accessible by projected category unique ids.
			this._oQueriesResult = {};

			this.logger = features['Dashboard.Logger'];
			this.visualization = features['Visualization'];
			this.renderSequence = features['RenderSequence'];
			this.renderSequence.registerRenderStepProvider(this);
			this.content = content;
			this._api = {
				getSummary: this._getSummary.bind(this),
				isNotSupported: this.isNotSupported.bind(this)
			};
		}

		/**
   * @override
   * @public
   * @function getAPI
   * Get the Summary feature API
   * @returns the public api of the summary feature that is accessible by clients.
   */


		SummaryFeature.prototype.getAPI = function getAPI() {
			return this._api;
		};

		/**
   * Load the feature if a data slot has "summaries" in slot definition,
   * and "summaryValues" in the same (table) or another (e.g. crossTab) slot definition with data items
   * of aggregation type belongs to any of the following:
   * [
  	'none',
  	'countdistinct',
  	'avg',
  	'calculated',
  	'automatic'
  	]
   */


		SummaryFeature.prototype.isEnabled = function isEnabled() {
			return _.find(this.visualization.getSlots().getSlotList(), function (slot) {
				return slot.getDefinition().getProperty('summaries') || slot.getDefinition().getProperty('summaryValues');
			});
		};

		/**
   * Check unsupported conditions:
   * 1) If crossjoin of data items set is greater than limit
   * 2) no value filters in the widget (we can try to allow this in relational)
   * 3) no OLAP
   */


		SummaryFeature.prototype.isNotSupported = function isNotSupported() {
			// 1. Not supported when number of nesting is greater than limit.
			var numberOfNest = 1;
			var slotAPIs = this.visualization.getSlots().getMappedSlotList();
			_.each(slotAPIs, function (slotAPI) {
				numberOfNest = slotAPI.getDefinition().getProperty('summaries') ? numberOfNest * slotAPI.getDataItemList().length : numberOfNest;
			});
			var isNotSupported = numberOfNest > NESTED_ITEM_LIMIT;
			if (isNotSupported) {
				return isNotSupported;
			}

			// 2. Not supported when there is post fact filter.
			var localFilters = this.visualization.getLocalFilters().getFilterList();
			isNotSupported = _.find(localFilters, function (entry) {
				return entry.aggregationType && entry.preOrPost === 'post' && FilterSpecHelper.isRange(entry);
			}) !== undefined;
			if (isNotSupported) {
				return isNotSupported;
			}

			// 3. Not supported when is OLAP
			// Just check one dataItem since data items are from all the same data source
			var dataItemAPIs = slotAPIs && slotAPIs.length && slotAPIs[0].getDataItemList();
			isNotSupported = !dataItemAPIs || dataItemAPIs.length === 0 || !dataItemAPIs[0].getMetadataColumn() || dataItemAPIs[0].getMetadataColumn().isOlapColumn();
			if (isNotSupported) {
				return isNotSupported;
			}

			var topBottoms = {};

			slotAPIs.forEach(function (slot) {
				var dataItems = slot.getDataItemList();
				dataItems.forEach(function (dataItem) {
					if (dataItem.getTopBottom()) {
						// 4. Not supported when there is a topBottom defined on a fact data item and is in summaryValues slot (RTC#250663)
						if (slot.getDefinition().getProperty('summaryValues') && dataItem.getType() === 'fact') {
							isNotSupported = true;
						}
						// Map of topBottoms per slot
						if (!topBottoms[slot.getId()]) {
							topBottoms[slot.getId()] = [];
						}
						topBottoms[slot.getId()].push(dataItem);
					}
				});
			});

			if (isNotSupported) {
				return isNotSupported;
			}

			// 5. Not supported when there are top/bottom on different slots (RTC#243655)
			return _.size(topBottoms) > 1;
		};

		/**
   * @override
   * @public
   * @function getExtraRenderSequenceSteps
   * Get the extra render sequence task required for the summary feature
   * @returns {Object[]} Array of task definitions
   */


		SummaryFeature.prototype.getRenderStepList = function getRenderStepList() {
			return this.isEnabled() ? [{
				id: 'data-summary',
				dependencies: ['data'],
				modulePath: 'dashboard-analytics/extensions/client-summaries/content-features/SummaryTask',
				moduleOptions: {
					summaryFeature: this,
					visualization: this.visualization,
					content: this.content
				}
			}] : [];
		};
		/**
   * @private
   * @public
   * @function _getSummary
   * Get summary result by UIs
   * @param {string[]} categoryUIds - array of unique category data item ids to identify a summary query result
   * @param {string} measureUId - the unique id of the measure to get the summary
   * @param {string[]} tupleIds - array of unique tuple id to get a summary tuple cell
   * @returns {Promise} A promise which resolves the summary query result when the result is ready
   */


		SummaryFeature.prototype._getSummary = function _getSummary(categoryUIds, measureUId, tupleIds) {
			var _this = this;

			var originalCategoryUIds = categoryUIds.slice(0);
			var queryResultPromise = this._oQueriesResult[this._getCategoryQueryKey(categoryUIds)];
			if (queryResultPromise) {
				return queryResultPromise.then(function (summaryResult) {
					return summaryResult.getValue(originalCategoryUIds, measureUId, tupleIds);
				}).catch(function (error) {
					// return Promise.reject(this._buildErrorObj(error));
					return _this._buildErrorObj(error);
				});
			} else {
				return Promise.resolve(this._buildErrorObj());
			}
		};

		/**
   * @returns error object from different error case
   */


		SummaryFeature.prototype._buildErrorObj = function _buildErrorObj() {
			return {
				error: StringResources.get('errorCellWarning')
			};
		};

		/**
   * @returns {object} an object of an array of combination of category unique ids of the widget and an array of the measures with aggregation
   * types in SUMMARY_TYPES. If a widget has slot1 = [A, B, C], slot2 = [D, E, F], value slot = [G, H] where aggregate for G and H is avg.
   * @example result = {
   * 	aCategoryUIds: [[A],[AB],[ABC],[D],[DE],[EDF],[AD],[ADE],[ADEF],[ABD],[ABDE],[ABDEF],[ABCD],[ABCDE]],
   * 	aOrdinalUIds: [G, H]
   * }
   */


		SummaryFeature.prototype.getProjectionListObj = function getProjectionListObj() {
			this._oQueryProjectionObj = {};

			var aSummarySlotsDataItems = []; // An array of category slot dataItems array where the summary is corresponding to
			var aSummaryValuesDataItems = []; // An array of ordinal slot dataItems array where the summary is applied t
			var dataSlots = this.visualization.getSlots().getMappedSlotList();
			dataSlots.forEach(function (slotAPI) {
				if (slotAPI.getDefinition().getProperty('summaries')) {
					var categoryDataItems = _.filter(slotAPI.getDataItemList(), function (dataItem) {
						return dataItem.getType() === 'attribute';
					});
					if (categoryDataItems) {
						aSummarySlotsDataItems.push(categoryDataItems);
					}
				}
				if (slotAPI.getDefinition().getProperty('summaryValues')) {
					var ordinalDataItems = _.filter(slotAPI.getDataItemList(), function (dataItem) {
						return SummaryTypes.indexOf(dataItem.getAggregation()) !== -1 && dataItem.getType() === 'fact';
					});
					aSummaryValuesDataItems = aSummaryValuesDataItems.concat(ordinalDataItems);
				}
			});

			if (aSummarySlotsDataItems.length || aSummaryValuesDataItems.length) {
				if (aSummarySlotsDataItems.length) {
					// 1) Build unique id sets from all data items of all category slots. E.g. slot1 = [A, B, C], slot2 = [D, E, F]
					// aSlotDataItemUIdSets = [
					//  [A, AB, ABC],
					//  [D, DE, EDF]
					// ]
					var aSlotDataItemUIdSets = this._buildIdSetsFromSlotsDataItems(aSummarySlotsDataItems);

					// 2) Build cross join set from direct unique id sets
					if (aSlotDataItemUIdSets.length) {
						aSlotDataItemUIdSets = this._crossJoinSlotUIdSets(aSlotDataItemUIdSets);
					}

					var aResultCategoryUIds = _.flatten(aSlotDataItemUIdSets, true);
					aResultCategoryUIds.pop(); // Remove the detail unique id combinations
					this._oQueryProjectionObj.aCategoryUIds = aResultCategoryUIds;
				} else {
					this._oQueryProjectionObj.aCategoryUIds = [];
				}

				if (aSummaryValuesDataItems.length) {
					// Array of summary values slots dataItems UIs.
					var aSummaryValuesUIds = _.map(aSummaryValuesDataItems, function (valueDataItem) {
						return valueDataItem.getId();
					});
					this._oQueryProjectionObj.aOrdinalUIds = aSummaryValuesUIds;
				} else {
					this._oQueryProjectionObj.aOrdinalUIds = [];
				}
			}

			return this._oQueryProjectionObj;
		};

		SummaryFeature.prototype._buildIdSetsFromSlotsDataItems = function _buildIdSetsFromSlotsDataItems(aSummarySlotsDataItems) {
			var aSlotDataItemUIdSets = [];
			aSummarySlotsDataItems.forEach(function (dataItems) {
				var currentUIds = [];
				var aUIdsPerSlot = [];
				dataItems.forEach(function (dataItem) {
					currentUIds = currentUIds.concat(dataItem.getId());
					aUIdsPerSlot.push(currentUIds);
				});
				aSlotDataItemUIdSets.push(aUIdsPerSlot);
			});
			return aSlotDataItemUIdSets;
		};

		SummaryFeature.prototype._crossJoinSlotUIdSets = function _crossJoinSlotUIdSets(aSlotDataItemUIdSets) {
			var crossjointUIds = [];
			for (var i = 0; i < aSlotDataItemUIdSets.length; i++) {
				var aSet1 = aSlotDataItemUIdSets[i];
				var j = i + 1;
				while (aSlotDataItemUIdSets[j] && aSlotDataItemUIdSets[j].length) {
					crossjointUIds.push(this._crossJoin(aSet1, aSlotDataItemUIdSets[j]));
					j++;
				}
			}
			return aSlotDataItemUIdSets.concat(crossjointUIds);
		};

		/**
   * Build a crossjoin set of 2 sets.
   * @example
   * set1 = [A, AB, ABC]
   * set2 = [D, DE, DEF]
   * result = [
   * 	AD,
   * 	ADE,
   *  ADEF,
   * 	ABD,
   *  ABDE,
   * 	ABDEF,
   * 	ABCD,
   * 	ABCDE,
   * 	ABCDEF // The last element generated is a detail row
   * ]
   *
   * @param {Array} aUIdSet1 first set which is an array of unique UIs
   * @param {Array} aUIdSet2 second set. An array of unique UIs
   * @returns a crossjoin set of aUIdSet1 and aUIdSet2
   */


		SummaryFeature.prototype._crossJoin = function _crossJoin(aUIdSet1, aUIdSet2) {
			var crossjointUIds = [];
			aUIdSet1.forEach(function (keySet1) {
				var jointKeys = [];
				aUIdSet2.forEach(function (keySet2) {
					jointKeys = keySet1.concat(keySet2);
					crossjointUIds.push(jointKeys);
				});
			});
			return crossjointUIds;
		};

		/**
   * @private
   * @public
   * Add a summary result to queries map.
   * The corresponding entry is the query promise.
   * @param {integer} idx the index of the aCategoryUIds
   * @param {Object} queryPromise the summary query promise
   */


		SummaryFeature.prototype.addSummaryQueryResult = function addSummaryQueryResult(idx, queryPromise) {
			var _this2 = this;

			this._oQueriesResult[this._getCategoryQueryKey(this._oQueryProjectionObj.aCategoryUIds[idx])] = queryPromise.then(function (queryResult) {
				return new SummaryQueryResult(queryResult.getResult(), _this2.logger);
			}).catch(function (error) {
				_this2.logger.error(error);
				return Promise.reject(error);
			});
		};

		/**
   * @private
   * @param {string []} aCategoryUId - an array of strings represent the category unique ids.
   * @returns string - unique summary query key
   */


		SummaryFeature.prototype._getCategoryQueryKey = function _getCategoryQueryKey(aCategoryUId) {
			// The key is built from all category data item unique ids.
			// The overall summary query doesn't have any category unique id.
			var uniqueIds = aCategoryUId && aCategoryUId.length ? aCategoryUId : [OVERALL_SUMMARY_QUERY_KEY];
			uniqueIds.sort();
			return uniqueIds.join();
		};

		return SummaryFeature;
	}();

	return SummaryFeature;
});
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