'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 Business Analytics (C) Copyright IBM Corp. 2019, 2020
 * US Government Users Restricted Rights - Use, duplication or disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
 */

/**
 * @class VisDnD
 * @hideconstructor
 *
 * @classdesc Handles drag and drop of metadata to create a visualization.
 */
define(['../../../../../lib/@waca/dashboard-common/dist/api/DnDProviderAPI', '../../../../../lib/@waca/dashboard-common/dist/core/APIFactory', 'underscore'], function (DnDProviderAPI, APIFactory, _) {

	var METADATA_TYPES = ['MODEL_ITEM', 'GRID_HEADER_ITEM'];

	return function () {
		function MetadataDnD() {
			var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

			_classCallCheck(this, MetadataDnD);

			this.features = options.features;
			var canvasDnD = this.features['CanvasDnD'];

			if (!canvasDnD) {
				throw new Error('MetadataDnD should depend on the CanvasDnD dashboard feature');
			}

			canvasDnD.registerProvider(this.getAPI());
		}

		MetadataDnD.prototype.getAPI = function getAPI() {
			if (!this.api) {
				this.api = APIFactory.createAPI(this, [DnDProviderAPI]);
			}
			return this.api;
		};

		MetadataDnD.prototype.destroy = function destroy() {
			this.api = null;
		};

		MetadataDnD.prototype.accepts = function accepts(payload, options) {
			return MetadataDnD.canAccepts(payload, options);
		};

		MetadataDnD.canAccepts = function canAccepts() {
			var payload = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
			var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};

			var isValid = payload.data && payload.data.utils && payload.data.utils.isValid(options);
			return isValid && METADATA_TYPES.indexOf(payload.type) !== -1 ? true : false;
		};

		MetadataDnD.prototype.onDrop = function onDrop() {
			var payload = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};

			if (!payload.data || !(METADATA_TYPES.indexOf(payload.type) !== -1)) {
				return null;
			}

			var dataItems = [];
			var localFilters = [];
			var droppedColumns = payload.data.columns ? payload.data.columns : [];
			var originalMetadataColumns = _.map(droppedColumns, function (column) {
				return column.original.metadataColumn;
			});
			var navPathIds = _.reduce(originalMetadataColumns, function (result, item) {
				var parent = item.getParent();
				var isDrillGroup = parent && parent.getObjectType() === 'DrillGroup';
				var navPathId = isDrillGroup && typeof parent.getIdentifier === 'function' ? parent.getId() : null;
				var itemId = item.getId();

				if (navPathId && itemId) {
					var currentNavPathID = {};
					currentNavPathID[itemId] = navPathId;
					return _.defaults(result, currentNavPathID);
				} else {
					return result;
				}
			}, {});

			var metadataColumns = _.map(droppedColumns, function (column) {
				return column.metadataColumn;
			});

			var columnIds = [];
			metadataColumns.forEach(function (metadataColumn) {
				if (metadataColumn.isFilter()) {
					localFilters.push({
						id: metadataColumn.getId(),
						columnId: metadataColumn.getId()
					});
				} else {
					columnIds.push(metadataColumn.getId());
					dataItems.push({
						itemId: metadataColumn.getId(),
						itemLabel: metadataColumn.getLabel()
					});
				}
			});

			//Now add selected members as local filters
			var columnsWithMembers = payload.data.utils.getColumnsWithMembers();

			metadataColumns.forEach(function (metadataColumn) {
				var useAsLocalFilters = columnsWithMembers[metadataColumn.getId()];
				if (useAsLocalFilters && useAsLocalFilters.length > 0) {
					var filter = {
						id: metadataColumn.getId(),
						columnId: metadataColumn.getId(),
						overrideHierarchyDefaultSelection: true,
						excludedValues: [],
						operator: 'in',
						type: null,
						binsLabel: metadataColumn.getLabel(),
						values: []
					};
					useAsLocalFilters.forEach(function (value) {
						filter.values.push({
							d: value.memberCaption,
							u: value.id
						});
					});

					localFilters.push(filter);
				}
			});

			var result = {
				type: 'live',
				data: {
					dataViews: [{
						modelRef: payload.data.sourceId,
						dataItems: dataItems
					}]
				}
			};

			if (localFilters.length > 0) {
				result.localFilters = localFilters;
			}

			// Go over the dataitems and insert the navpath id
			result.data.dataViews.forEach(function (dataView) {
				dataView.dataItems.forEach(function (dataItem) {
					dataItem.navigationPathId = navPathIds[dataItem.itemId] || null;
				});
			});

			return Promise.resolve(result);
		};

		return MetadataDnD;
	}();
});
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