/*
 * 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 { QuestionnaireItemAnswerOption, QuestionnaireResponseItemAnswer } from 'fhir/r4';
import { getRelevantCodingProperties } from './codingProperties';

/**
 * Find and return corresponding answerOption based on selected answer in form.
 * Matches by code, display, string, or integer value.
 *
 * @author Sean Fong
 */
export function findInAnswerOptions(
  options: QuestionnaireItemAnswerOption[],
  str: string
): QuestionnaireResponseItemAnswer | undefined {
  for (const option of options) {
    if (option.valueCoding) {
      if (str === option.valueCoding.code) {
        return {
          valueCoding: getRelevantCodingProperties(option.valueCoding)
        };
      }

      // handle case where valueCoding.code is not present
      if (str === option.valueCoding.display) {
        return {
          valueCoding: getRelevantCodingProperties(option.valueCoding)
        };
      }
    }

    if (option.valueString) {
      if (str === option.valueString) {
        return {
          valueString: option.valueString
        };
      }
    }

    if (option.valueInteger) {
      if (str === option.valueInteger.toString()) {
        return {
          valueInteger: option.valueInteger
        };
      }
    }
  }

  return;
}