import { shallowRef, watch, toRaw, watchEffect } from 'vue';
import { convertChildrenToData } from '../utils/legacyUtil.mjs';

function useOptions(options, children, fieldNames) {
  const mergedOptions = shallowRef();
  const valueOptions = shallowRef();
  const labelOptions = shallowRef();
  const tempMergedOptions = shallowRef([]);
  watch(
    [options, children],
    () => {
      if (options.value)
        tempMergedOptions.value = toRaw(options.value).slice();
      else
        tempMergedOptions.value = convertChildrenToData(children.value);
    },
    { immediate: true, deep: true }
  );
  watchEffect(() => {
    const newOptions = tempMergedOptions.value;
    const newValueOptions = /* @__PURE__ */ new Map();
    const newLabelOptions = /* @__PURE__ */ new Map();
    const fieldNamesValue = fieldNames.value;
    function dig(optionList, isChildren = false) {
      for (let i = 0; i < optionList.length; i += 1) {
        const option = optionList[i];
        if (!option[fieldNamesValue.options] || isChildren) {
          newValueOptions.set(option[fieldNamesValue.value], option);
          newLabelOptions.set(option[fieldNamesValue.label], option);
        } else {
          dig(option[fieldNamesValue.options], true);
        }
      }
    }
    dig(newOptions);
    mergedOptions.value = newOptions;
    valueOptions.value = newValueOptions;
    labelOptions.value = newLabelOptions;
  });
  return {
    options: mergedOptions,
    valueOptions,
    labelOptions
  };
}

export { useOptions as default };
//# sourceMappingURL=useOptions.mjs.map
