/*!
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 *
 * Licensed 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 {
    actionTypes,
    relationTypes,
    NEW_RULE_TEMP_ID
} from './SoftwareProductDependenciesConstants.js';
import { checkCyclesAndMarkDependencies } from './SoftwareProductDependenciesUtils.js';

let newRowObject = {
    id: NEW_RULE_TEMP_ID,
    targetId: null,
    sourceId: null,
    relationType: relationTypes.DEPENDS_ON
};

export default (state = [Object.assign({}, newRowObject)], action) => {
    switch (action.type) {
        case actionTypes.SOFTWARE_PRODUCT_DEPENDENCIES_LIST_UPDATE:
            // copying the entity with the data for the row that is in the 'add' mode
            let newDependency = state.find(
                dependency => dependency.id === NEW_RULE_TEMP_ID
            );
            action.dependenciesList.push(newDependency);
            // returning list from the server with our 'new entity' row
            return checkCyclesAndMarkDependencies(action.dependenciesList);
        case actionTypes.ADD_SOFTWARE_PRODUCT_DEPENDENCY:
            // resetting the entity with the data for the 'add' mode for a new entity
            let newArray = state.filter(
                dependency => dependency.id !== NEW_RULE_TEMP_ID
            );
            newArray.push(Object.assign({}, newRowObject));
            return newArray;
        case actionTypes.UPDATE_NEW_SOFTWARE_PRODUCT_DEPENDENCY:
            // we really only need this for the 'new' row since we need to change the state to get
            // everything updated
            let updateArrayIndex = state.findIndex(
                dependency => dependency.id === NEW_RULE_TEMP_ID
            );
            let updateArray = state.slice();
            updateArray.splice(updateArrayIndex, 1, action.item);
            return checkCyclesAndMarkDependencies(updateArray);
        default:
            return state;
    }
};