buildNativeField function presentation exported ✓ 100.0%

export function buildNativeField(element: NativeElement): FormField {
  const labelResult = findLabelWithStrategy(element);

  // ── DOM metadata ────────────────────────────────────────────────────────────
  const inputType =
    element instanceof HTMLInputElement ? element.type : undefined;
  const pattern =
    element instanceof HTMLInputElement && element.pattern
      ? element.pattern
      : undefined;
  const maxLength =
    (element instanceof HTMLInputElement ||
      element instanceof HTMLTextAreaElement) &&
    element.maxLength > 0
      ? element.maxLength
      : undefined;
  const minLength =
    (element instanceof HTMLInputElement ||
      element instanceof HTMLTextAreaElement) &&
    element.minLength > 0
      ? element.minLength
      : undefined;

  // ── Select options ──────────────────────────────────────────────────────────
  const options =
    element instanceof HTMLSelectElement
      ? Array.from(element.options)
          .filter((o) => o.value !== "")
          .map((o) => ({ value: o.value, text: o.text.trim() }))
      : undefined;

  // ── Checkbox / Radio ────────────────────────────────────────────────────────
  const isCheckable =
    element instanceof HTMLInputElement &&
    (element.type === "checkbox" || element.type === "radio");
  const checkboxValue = isCheckable
    ? (element as HTMLInputElement).value || undefined
    : undefined;
  const checkboxChecked = isCheckable
    ? (element as HTMLInputElement).checked
    : undefined;

  const field: FormField = {
    element,
    selector: getUniqueSelector(element),
    category: "unknown",
    fieldType: "unknown",
    label: labelResult?.text,
    name: element.name || undefined,
    id: element.id || undefined,
    placeholder:
      ("placeholder" in element ? element.placeholder : undefined) || undefined,
    autocomplete: element.autocomplete || undefined,
    inputType,
    required: element.required,
    pattern,
    maxLength,
    minLength,
    options,
    checkboxValue,
    checkboxChecked,
  };
  field.contextSignals = buildSignals(field);
  return field;
}