/*
 * Copyright 2025 Commonwealth Scientific and Industrial Research
 * Organisation (CSIRO) ABN 41 687 119 230.
 *
 * 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 type { QuestionnaireResponseItem } from 'fhir/r4';
import type { RepeatGroupSingleModel } from '../interfaces/repeatGroup.interface';
import { useMemo } from 'react';
import { generateExistingRepeatId, generateNewRepeatId } from '../utils/repeatId';

function useInitialiseRepeatGroups(
  linkId: string,
  qrItems: QuestionnaireResponseItem[]
): RepeatGroupSingleModel[] {
  return useMemo(() => {
    if (qrItems.length === 0) {
      return [{ id: generateNewRepeatId(linkId), qrItem: null }];
    }

    return qrItems.map((qrItem, index) => {
      return {
        id: generateExistingRepeatId(linkId, index),
        qrItem
      };
    });
  }, [linkId, qrItems]);
}

export default useInitialiseRepeatGroups;