import { FieldContextKey } from "vee-validate";
import { computed, inject } from "vue";
import { FORM_ITEM_INJECTION_KEY } from "./injectionKeys";

export function useFormField() {
  const fieldContext = inject(FieldContextKey);
  const fieldItemContext = inject(FORM_ITEM_INJECTION_KEY);

  if (!fieldContext)
    throw new Error("useFormField should be used within <FormField>");

  const { name, errorMessage: error, meta } = fieldContext;
  const id = fieldItemContext;

  const fieldState = {
    valid: computed(() => meta.valid),
    isDirty: computed(() => meta.dirty),
    isTouched: computed(() => meta.touched),
    error,
  };

  return {
    id,
    name,
    formItemId: `${id}-form-item`,
    formDescriptionId: `${id}-form-item-description`,
    formMessageId: `${id}-form-item-message`,
    ...fieldState,
  };
}