'use strict';

/*
 *+------------------------------------------------------------------------+
 *| Licensed Materials - Property of IBM
 *| IBM Cognos Products: Dashboard
 *| (C) Copyright IBM Corp. 2017, 2020
 *|
 *| US Government Users Restricted Rights - Use, duplication or disclosure
 *| restricted by GSA ADP Schedule Contract with IBM Corp.
 *+------------------------------------------------------------------------+
 */

define(['./SmartsRecommenderService', './SmartsRecommenderError'], function (BaseService, SmartsError) {
	'use strict';

	var SMARTS_ROOT = 'v1/smarts';
	var CHART_INFO = SMARTS_ROOT + '/visualization-recommender/chartInfo';
	var ALTERNATE_VISUALIZATION_URL = SMARTS_ROOT + '/visualization-recommender/recommend';
	var RELATED_VISUALIZATION_URL = SMARTS_ROOT + '/insights/related-visualizations';
	// This Smarts API will return first vis as the best vis for target fields, and other vis for related fields
	// of the target fields
	var RECOMMENDER_RELATED_VISUALIZATION_URL = SMARTS_ROOT + '/explore/related-visualizations';

	var RECOMMENDER_COMPARE_VISUALIZATION_URL = SMARTS_ROOT + '/content-recommender/comparison';

	var SmartsVisRecommenderService = BaseService.extend({

		init: function init(options) {
			SmartsVisRecommenderService.inherited('init', this, arguments);
			this.ajaxSvc = options.ajaxSvc;
			this.logger = options.logger;
		},

		/**
   * Get result from chartInfo endpoint
   */
		getChartInfo: function getChartInfo(requestParams) {
			this.logger.debug('getRecommendInfo');

			return this._executeRequest(requestParams, CHART_INFO).catch(this._handleError.bind(this)).then(function (_ref) {
				var data = _ref.data;

				if (data.smartsStatus !== SmartsError.STATUS.OK) {
					throw new SmartsError(data.smartsStatus, data.details);
				}

				// Recommender may return more than one answer that matches the same slot mappings.
				// In some cases it may return those mappings plus unmapped slots with the 'mandatorySlotMissing' Flag set.
				// Give preference to the first complete one as the title source (unless no complete ones are returned).
				var chartInfo = data;
				if (data.recommendations) {
					var completeRecommendations = data.recommendations.filter(function (recommendation) {
						return !recommendation.mandatorySlotsMissing;
					});
					chartInfo = completeRecommendations && completeRecommendations.length ? completeRecommendations[0] : data.recommendations[0];
				}
				return {
					title: chartInfo.title,
					label: chartInfo.label,
					description: chartInfo.description,
					mandatorySlotsMissing: chartInfo.mandatorySlotsMissing
				};
			});
		},

		recommendAlternateVisualizationsOrBindings: function recommendAlternateVisualizationsOrBindings(requestParams) {
			this.logger.debug('recommendAlternateVisualizationsOrBindings');

			return this._executeRequest(requestParams, ALTERNATE_VISUALIZATION_URL).catch(this._handleError.bind(this)).then(this._processResponse.bind(this));
		},

		recommendRelatedVisualizations: function recommendRelatedVisualizations(requestParams) {
			var url = RELATED_VISUALIZATION_URL;
			if (requestParams.includeBestVisForTargetFields) {
				url = RECOMMENDER_RELATED_VISUALIZATION_URL;
			}
			this.logger.debug('recommendRelatedVisualizations');

			return this._executeRequest(requestParams, url).catch(this._handleError.bind(this)).then(this._processResponse.bind(this));
		},

		recommendCompareVisualizations: function recommendCompareVisualizations(requestParams) {
			var url = RECOMMENDER_COMPARE_VISUALIZATION_URL;

			this.logger.debug('recommendCompareVisualizations');

			return this._executeRequest(requestParams, url).catch(this._handleError.bind(this)).then(this._processCompareResponse.bind(this));
		},

		_processResponse: function _processResponse(ajaxResponse) {
			var recommenderResponse = ajaxResponse.data;
			if (recommenderResponse.smartsStatus === SmartsError.STATUS.OK) {
				return recommenderResponse.recommendations;
			} else {
				throw new SmartsError(recommenderResponse.smartsStatus, recommenderResponse.details);
			}
		},

		_processCompareResponse: function _processCompareResponse(ajaxResponse) {
			var recommenderResponse = ajaxResponse.data;
			if (recommenderResponse.status.code === SmartsError.STATUS.OK) {
				return recommenderResponse.ircontent;
			} else {
				throw new SmartsError(recommenderResponse.smartsStatus, recommenderResponse.details);
			}
		},

		_handleError: function _handleError(ajaxError) {
			var responseJSON = ajaxError.jqXHR.responseJSON;
			this.logger.debug(responseJSON);
			if (responseJSON) {
				throw new SmartsError(responseJSON.smartsStatus, responseJSON.details);
			} else {
				throw new SmartsError(ajaxError.jqXHR.fail().status, ajaxError.jqXHR.fail().responseText);
			}
		}

	});

	return SmartsVisRecommenderService;
});
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