'use strict';

/*
 *+------------------------------------------------------------------------+
 *| Licensed Materials - Property of IBM
 *| IBM Cognos Products: Dashboard
 *| (C) Copyright IBM Corp. 2013, 2020
 *|
 *| US Government Users Restricted Rights - Use, duplication or disclosure
 *| restricted by GSA ADP Schedule Contract with IBM Corp.
 *+------------------------------------------------------------------------+
 */
// The VisQueryExecution object manages a set of queries that are needed to provide the data for a visualization.
define(['jquery', 'underscore', './VisQueryBuilder', '../../../lib/@waca/core-client/js/core-client/ui/core/Class', './CommonQueryBuilder', './legacy/QueryManager', '../../../widgets/livewidget/nls/StringResources', '../../../dataSources/utils/DatasourceUtil', './postprocess/VisQueryPostProcessHelper'], function ($, _, VisQueryBuilder, Class, CommonQueryBuilder, QueryManager, StringResources, DatasourceUtil, PostProcessHelper) {

	'use strict';

	var VisQueryExecution = null; // class declaration

	VisQueryExecution = Class.extend({

		init: function init(options) {
			console.debug('visQueryExecution (lw) init');
			VisQueryExecution.inherited('init', this, arguments);

			options = options || {};
			this.queryService = options.queryService;
			this.ownerWidget = options.ownerWidget;
			this.metadataAPI = options.metadataAPI;
			this.pageContext = options.pageContext;
			this.visAPI = options.visAPI;
			this._commonQueryHelper = options.queryHelper;

			//Optionally, override this function to perform operations on the data prior to post processing.
			this._callUnprocessedResultDataHandlers = options.callUnprocessedResultDataHandlers || this._callUnprocessedResultDataHandlers;

			this._queryManager = new QueryManager({
				'queryService': this.queryService,
				'visAPI': this.visAPI,
				'dashboardAPI': this.ownerWidget && this.ownerWidget.getDashboardApi && this.ownerWidget.getDashboardApi(),
				'postProcessCallback': this.postProcess.bind(this),
				'_callUnprocessedResultDataHandlers': this._callUnprocessedResultDataHandlers.bind(this)
			});

			if (!this.visQueryBuilder) {
				var cbGetNLT = this.ownerWidget && this.ownerWidget.getFeature && this.ownerWidget.getFeature.bind(this.ownerWidget, 'vis-chart-insights');
				this.visQueryBuilder = new VisQueryBuilder({
					'visAPI': this.visAPI,
					'getNLT': cbGetNLT
				});
			}

			//The _queryChangedCompareString is used to avoid querying in cases where a spec change has no impact on the query definition (or result)
			this._queryChangedCompareString = null;
		},

		/**
   * Ensure that the slots are up-to-date and prepare the data (if necessary).
   * @param localFiltersOnly (optional) if set, only local filters will be passed to the queryDefinition. If not set, both local and cross-widget filters are passed.
   * @returns a promise.
   */
		execute: function execute(queryContext) {
			if (queryContext.isInvalidReason) {
				queryContext.cbQueryFailed({
					reason: queryContext.isInvalidReason
				});
				return Promise.reject();
			}

			return this.getQueryOptionsArray(queryContext).then(function (result) {
				result = result || {};

				// Compare with the main data query.
				// Auxiliary queries (ie. summaries) can be ignored.
				var aQueryOptionsArray = result.aQueryOptionsArray;
				if (!queryContext.auxQuery) {
					this._queryChangedCompareString = this._buildQueryChangedCompareString(aQueryOptionsArray);
				}

				return this._doExecute(queryContext, aQueryOptionsArray).then(function (resultData) {
					if (resultData) {
						resultData.synchDataFilterEntries = result.synchDataFilterEntries;
					}
					return resultData;
				});
			}.bind(this));
		},

		//This function can be overridden in constructor options to perform tasks on un-postprocessed data.
		_callUnprocessedResultDataHandlers: function _callUnprocessedResultDataHandlers() {},

		postProcess: function postProcess(resultDataEntry) {
			PostProcessHelper.postProcessMeasuresAsSeries(resultDataEntry, this);
			PostProcessHelper.postProcessAggregatedSort(resultDataEntry, this);
			PostProcessHelper.postProcessCustomSort(resultDataEntry, this);
			PostProcessHelper.postProcessAutobinningAxisLabels(resultDataEntry, this);
		},


		_doExecute: function _doExecute(queryContext, queryOptions) {
			var _this = this;

			return this.getQueryManager().whenQueryResultsReady(queryContext.renderContext, queryOptions, queryContext.sender, queryContext.useAPI, queryContext.auxQuery).catch(function (jqXHR) {
				return Promise.reject(_this._queryFailed(jqXHR));
			});
		},

		getQueryOptionsArray: function getQueryOptionsArray(queryContext) {
			//lat/long TODO, This is array of query definition
			//Lat/Long new query Definition Object
			return this._createQueryDefinition(queryContext).then(function (result) {
				result = result || {};
				var visQueryDefinition = result.visQueryDefinition;

				var aQueryOptionsArray = [];
				var oSpecsForQueryDefinition = visQueryDefinition.getQueryDefinitions(); // hand back

				_.each(oSpecsForQueryDefinition, function (oDef) {
					var oQueryDefObj = this.getQueryDefinition();
					oQueryDefObj.setQueryDataItems(oDef.getDataItems());
					oQueryDefObj.setQueryProjections(oDef.getProjections());

					//TopBottom queries need to be 'scoped' to items on the current page (tab)
					oQueryDefObj.setTopBottomQueryPageScope(queryContext.scope);

					var initialQueryOptions = queryContext.queryOptions ? _.clone(queryContext.queryOptions) : {};
					var queryOptions = _.extend(initialQueryOptions, oQueryDefObj.build(initialQueryOptions, this.ownerWidget.visAPI));

					// Set filters to query spec
					var filters = oDef.getFilters();
					if (filters && filters.length) {
						queryOptions.querySpec.filters = filters;
					}

					queryOptions.sourceIdOrModule = this.metadataAPI.getModule();

					if (queryOptions.querySpec.queryHints) {
						_.extend(queryOptions.querySpec.queryHints, oDef.getQueryHints());
					} else {
						queryOptions.querySpec.queryHints = oDef.getQueryHints();
					}

					if (queryContext.queryOptions && queryContext.queryOptions.needsUnaggregatedForm) {
						queryOptions.querySpec.type = 'detail';
					}
					// Pass the functions to handle prompt fault.
					queryOptions.promptControlFunctions = {
						'preparePromptSpec': this.preparePromptSpec.bind(this),
						'whenSingleItemQueryReady': this._commonQueryHelper.whenSingleItemQueryReady.bind(this._commonQueryHelper, queryOptions.sourceIdOrModule),
						'whenColumnsMinMaxQueryReady': this._commonQueryHelper.whenColumnsMinMaxQueryReady.bind(this._commonQueryHelper, queryOptions.sourceIdOrModule),
						'getPromptSpec': this.getPromptSpec.bind(this),
						'savePromptSpec': this.savePromptSpec.bind(this),
						'updatePromptSpecCache': this.updatePromptSpecCache.bind(this),
						'onCancelPromptDialog': this.onCancelPromptDialog.bind(this),
						'onUnSupportedPromptType': this.ownerWidget.onUnSupportedPrompt.bind(this, StringResources.get('unSupportedPromptType'))
					};

					queryOptions.layerId = oDef.getLayerId();
					if (this.ownerWidget && this.ownerWidget.isPreview) {
						queryOptions.isPreview = true;
					}

					aQueryOptionsArray.push(queryOptions);
				}, this);

				return { aQueryOptionsArray: aQueryOptionsArray, synchDataFilterEntries: result.synchDataFilterEntries };
			}.bind(this));
		},

		_buildQueryChangedCompareString: function _buildQueryChangedCompareString(results) {
			var queryChangedCompareString = '';
			_.each(results, function (result) {
				queryChangedCompareString += JSON.stringify(result.querySpec);
			});
			return queryChangedCompareString;
		},

		queryChanged: function queryChanged(queryContext) {
			return this.getQueryOptionsArray(queryContext).then(function (result) {
				var queryUrl = this._buildQueryChangedCompareString(result.aQueryOptionsArray);
				return {
					isRenderNeeded: this._queryChangedCompareString !== queryUrl,
					synchDataFilterEntries: result.synchDataFilterEntries
				};
			}.bind(this));
		},

		_createQueryDefinition: function _createQueryDefinition() {
			var _this2 = this;

			var queryContext = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

			queryContext.queryOptions = queryContext.queryOptions || {};
			queryContext.queryOptions.addExtraQueryDataItem = CommonQueryBuilder.addExtraQueryDataItem.bind(this, this.ownerWidget.model.getDataItemIdsMap(), queryContext.queryOptions);
			var visQueryDefinition = this.visQueryBuilder.create(queryContext);
			queryContext.metadataAPI = this.metadataAPI;
			var netPageContext = this._getNetPageContext(this.ownerWidget.visAPI.getDefinition().reactToExternalBrushing);

			var binningInfos = [];
			var aFilters = CommonQueryBuilder.buildFilterFromPageContext(netPageContext, queryContext, binningInfos);
			var extraQueryDataItems = queryContext.queryOptions.extraDataItems && queryContext.queryOptions.extraDataItems.length ? queryContext.queryOptions.extraDataItems : null;
			_.each(visQueryDefinition.getQueryDefinitions(), function (queryDefinition) {
				_this2._addBinningDataItemSpecIfNeedit(queryDefinition._dataItems, binningInfos);
				// Add extra query data items required by filter expression, if not already added
				if (extraQueryDataItems) {
					queryDefinition._dataItems = _.uniq(queryDefinition._dataItems.concat(extraQueryDataItems), false, function (dataItem) {
						return dataItem.id;
					});
				}
				queryDefinition.addFilters(aFilters);
			});

			return Promise.resolve({ visQueryDefinition: visQueryDefinition, synchDataFilterEntries: null });
		},

		_addBinningDataItemSpecIfNeedit: function _addBinningDataItemSpecIfNeedit(dataItems, binningInfos) {
			if (binningInfos) {
				CommonQueryBuilder.addBinningDataItemIfNeedit(dataItems, binningInfos);
			}
		},


		_isDifferentModule: function _isDifferentModule(queryContext) {
			queryContext = queryContext || {};
			if (!queryContext.sourceIds && !queryContext.assetIds) {
				return false;
			} else {
				return this.ownerWidget.idsNotInModule(queryContext.sourceIds, queryContext.assetIds);
			}
		},

		_getTableRef: function _getTableRef() {
			var tableRef = null;
			var visualization = this.ownerWidget.content.getFeature('Visualization');
			var datasource = visualization.getDataSource();
			if (datasource) {
				var slots = visualization.getSlots();
				var dataItems = slots.getDataItemList();
				tableRef = DatasourceUtil.getTableRef(datasource, dataItems.map(function (dataItem) {
					return dataItem.getColumnId();
				}));
			}
			return tableRef;
		},

		_getNetPageContext: function _getNetPageContext(reactToExternalBrushing) {
			var _this3 = this;

			var param = {
				scope: this.ownerWidget.getContainerPageId(),
				eventGroupId: this.ownerWidget.getEventGroupId(),
				sourceId: this.metadataAPI.getModule().getSourceId()
			};

			if (reactToExternalBrushing === false) {
				param.origin = 'filter';
			}

			var netPageContext = this.pageContext && this.pageContext.getNetPageContext(param) || [];

			// Longer term - this filtering should be removed. The query service will ignore filters that don't apply
			// (instead of throwing an error) and return messages indicating that certain filters are being ignored.
			// Shorter term - we may need to compare table references to avoid errors but if there is no table ref,
			// just let it pass through (e.g. for a global calculation) and let the query service handle it.
			var tableRef = this._getTableRef();
			var isEmptyTableRef = function isEmptyTableRef(aTableRef) {
				return !aTableRef || _.every(aTableRef, function (ref) {
					return _.isEmpty(ref);
				});
			};
			var haveTableJoin = function haveTableJoin(pageContext) {
				if (isEmptyTableRef(tableRef)) {
					return true;
				}
				var pageContextTableRef = DatasourceUtil.getPageContextItemTableRef(_this3.metadataAPI.getModule(), pageContext);
				return isEmptyTableRef(pageContextTableRef) || DatasourceUtil.haveTableJoinsInSameDataSource(_this3.metadataAPI.getModule(), pageContextTableRef, tableRef);
			};
			netPageContext = netPageContext.filter(function (pageContext) {
				// Don't send anything page context entries that tables are no joined, otherwise get error from such as:
				// "code": "XQE-MSR-0008",
				// "details": "XQE-MSR-0008 In module \"newModel\", the following query subjects are not joined: \"Page_1\", \"Page_2\", \"Synch Source 2.xlsx\".\r\n\t

				// TODO - livewidget_cleanup -- this code used the old slot API -- verifdy if this is this dead code ?
				return DatasourceUtil.mustVerifyJoinTablesInSameDataSource(_this3.metadataAPI.getModule(), pageContext, _this3.visAPI.getDataSlots()) ? haveTableJoin(pageContext) : true;
			});

			return netPageContext;
		},

		_getNetPageContextFromOtherModules: function _getNetPageContextFromOtherModules() {
			var _this4 = this;

			var netPageContext = [];
			if (this.pageContext) {
				var currentSourceId = this.metadataAPI.getModule().getSourceId();
				var tableRef = this._getTableRef();
				var options = {
					scope: this.ownerWidget.getContainerPageId(),
					eventGroupId: this.ownerWidget.getEventGroupId(),
					origin: 'filter'
				};
				var pageContext = this.pageContext.getNetPageContextItems(options);
				netPageContext = pageContext.filter(function (context) {
					var otherTableRef = DatasourceUtil.getPageContextItemTableRef(_this4.metadataAPI.getModule(), context.getPageContextSpec());
					return context.getSourceId() !== currentSourceId || !DatasourceUtil.haveTableJoinsInSameDataSource(_this4.metadataAPI.getModule(), otherTableRef, tableRef);
				});
			}
			return netPageContext;
		},

		_queryFailed: function _queryFailed(failure) {
			var knownFailures = ['unSupportedPromptType', 'cancelPromptDialog', 'promptingIsDisabled'];
			if (knownFailures.indexOf(failure.message) !== -1) {
				// this failure will be handled in Explore
				return failure;
			}
			var oDS = this.metadataAPI.getModule();
			var msg = 'dwErrorRunningQuery';
			var code = void 0;
			if (failure.reason === 'staleRequest') {
				msg = 'dwErrorStaleRequest';
			} else if (failure.reason === 'geoQueryFail') {
				msg = 'dwErrorGeoData';
			} else if (failure.reason === 'cancelPromptSignon') {
				msg = 'dwPromptSignonCancelWarning';
			} else if (failure.responseJSON && failure.responseJSON.errors) {
				var oErr = failure.responseJSON.errors[0];
				code = oErr && oErr.code;
				if (code === 'DSS-GEN-0002') {
					this._hasUnavailableMetadataColumns = true;
					//M31 FIXME?
					//this.trigger('hasUnavailableMetadataColumns');
					return;
				} else if (code === 'DSS-GEN-0001') {
					msg = StringResources.get('errorSourceNotFound', {
						sourceName: oDS.getSourceName() || oDS.getSourceId()
					});
				} else if (code === 'XQE-PLN-0226') {
					msg = StringResources.get('errorActionNotSupported', {
						sourceName: oDS.getSourceName() || oDS.getSourceId()
					});
				} else if (oErr && oErr.message) {
					msg = oErr.message;
				}
			}
			var oParam = {};
			if (oDS) {
				oParam = {
					'datasetName': oDS.getSourceName() || oDS.getSourceId()
				};
			}
			if (failure.reason !== 'staleRequest') {
				this.visAPI.setInvalidReason({
					msg: msg,
					code: code
				});
			}
			return _.extend(new Error(), {
				msg: msg,
				param: oParam,
				hasUnavailableMetadataColumns: this._hasUnavailableMetadataColumns,
				errorInfo: failure
			});
		},

		getQueryService: function getQueryService() {
			return this.queryService;
		},

		/**
   * @return the query manager object which owns the query definition and results of
   * this widget's query.
   */
		getQueryManager: function getQueryManager() {
			return this._queryManager;
		},

		/**
   * @returns the query definition object which defines fields for the query.
   */
		getQueryDefinition: function getQueryDefinition() {
			return this.getQueryManager().getQueryDefinition();
		},

		/**
   * @returns the query results object which owns field values from the last executed query
   */
		getQueryResults: function getQueryResults() {
			return this.getQueryManager().getQueryResults();
		},

		savePromptSpec: function savePromptSpec(queryOptions) {
			this.ownerWidget.savePromptSpec(queryOptions);
		},

		getPromptSpec: function getPromptSpec(promptName) {
			return this.ownerWidget.getPromptSpec(promptName);
		},

		onCancelPromptDialog: function onCancelPromptDialog() {
			this.ownerWidget.onCancelPromptDialog();
		},

		updatePromptSpecCache: function updatePromptSpecCache(queryOptions) {
			var currPromptSpecs = queryOptions && queryOptions.querySpec ? queryOptions.querySpec.parameterValues : null;
			// When the query is nativeQuery, i.e. internally generated queries, we should not update saved prompts.
			// If UI knows which prompt is referenced by which data item, nativeQuery can be removed.
			if (!this.ownerWidget || queryOptions && queryOptions.nativeQuery) {
				return;
			}

			var savedSpecs = this.getPromptSpec();
			var newSpecs;
			if (savedSpecs) {
				if (currPromptSpecs && currPromptSpecs.length > 0) {
					var promptNames = _.pluck(currPromptSpecs, 'name');
					newSpecs = _.pick(savedSpecs, promptNames);
				}
				this.ownerWidget.setPromptSpecs(newSpecs);
			}
		},

		// this is called by reprompt.
		getPromptQueries: function getPromptQueries() {
			var module = this.metadataAPI.getModule();
			return {
				'whenSingleItemQueryReady': this._commonQueryHelper.whenSingleItemQueryReady.bind(this._commonQueryHelper, module),
				'whenColumnsMinMaxQueryReady': this._commonQueryHelper.whenColumnsMinMaxQueryReady.bind(this._commonQueryHelper, module),
				'savePromptSpec': this.savePromptSpec.bind(this),
				'updatePromptSpecCache': this.updatePromptSpecCache.bind(this)
			};
		},

		// TODO This function should be moved to PromptManager once we support OLAP prompts
		// and get rid of OLAP metadata checking (querySpecInvolvesOlapColumn).
		preparePromptSpec: function preparePromptSpec(jqXHR) {
			var errors = jqXHR.responseJSON.errors;
			var error = errors.length > 0 ? errors[0] : null;
			if (!error || !error.code) {
				return;
			}

			var params = error.parameters;
			if (!params || params.length === 0) {
				return;
			}

			var code = error.code;
			var aParamInfo = [];
			switch (code) {
				case 'QF-888':
					if (this.querySpecInvolvesOlapColumn()) {
						aParamInfo.push({
							involvesOlapColumn: true
						});
					} else {
						_.each(params, function (param) {
							param.value.name = param.name;
							param.value.errorCode = code;
							// TODO this part should be removed once the prompt fault has the query item ID refering the prompt.
							param.value.isMultiPrompt = params.length > 1;
							if (param.value.capabilities.optional) {
								// Do not prompt for optional prompt and save it with nil value so xqe will ignore this prompt.
								var optionalPrompt = _.extend(param.value, { values: [{ 'mun': 'nil' }] });
								this.ownerWidget.savePromptSpec(optionalPrompt);
							} else {
								aParamInfo.push(param.value);
							}
						}.bind(this));
					}
					break;

				default:
					break;
			}

			return aParamInfo;
		},

		querySpecInvolvesOlapColumn: function querySpecInvolvesOlapColumn() {
			var hasOlapColumn = false;
			var dataItemAPIs = this.ownerWidget.content.getFeature('Visualization').getSlots().getDataItemList();
			if (dataItemAPIs && dataItemAPIs.length > 0) {
				for (var i = 0; i < dataItemAPIs.length; ++i) {
					if (this._isOlapColumn(dataItemAPIs[i].getColumnId())) {
						hasOlapColumn = true;
						break;
					}
				}
			}
			return hasOlapColumn;
		},

		_isOlapColumn: function _isOlapColumn(columnId) {
			var metadataColumn = this.metadataAPI.getMetadataColumn(columnId);
			return metadataColumn && typeof metadataColumn.isOlapColumn === 'function' ? metadataColumn.isOlapColumn() : false;
		}

	});

	return VisQueryExecution;
});
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