/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 *
 * Any modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { IAggConfig } from 'src/plugins/data/public';

export enum AGGS_ACTION_KEYS {
  TOUCHED = 'aggsTouched',
  VALID = 'aggsValid',
}

interface AggsItem {
  touched: boolean;
  valid: boolean;
}

export interface AggsState {
  [aggId: string]: AggsItem;
}

export interface AggsAction {
  type: AGGS_ACTION_KEYS;
  payload: boolean;
  aggId: string;
  newState?: AggsState;
}

function aggGroupReducer(state: AggsState, action: AggsAction): AggsState {
  const aggState = state[action.aggId] || { touched: false, valid: true };
  switch (action.type) {
    case AGGS_ACTION_KEYS.TOUCHED:
      return { ...state, [action.aggId]: { ...aggState, touched: action.payload } };
    case AGGS_ACTION_KEYS.VALID:
      return { ...state, [action.aggId]: { ...aggState, valid: action.payload } };
    default:
      throw new Error();
  }
}

function initAggsState(group: IAggConfig[]): AggsState {
  return group.reduce((state, agg) => {
    state[agg.id] = { touched: false, valid: true };
    return state;
  }, {} as AggsState);
}

export { aggGroupReducer, initAggsState };
