(function (root, factory) {
  // 表单工具只处理跨页面通用转换，具体业务字段留在页面脚本中组织。
  if (typeof module === 'object' && module.exports) {
    module.exports = factory();
    return;
  }

  root.FormUtil = factory();
})(typeof globalThis !== 'undefined' ? globalThis : window, function () {
  'use strict';

  function trimOrUndefined(value) {
    if (value === undefined || value === null) return undefined;

    var text = String(value).trim();
    return text ? text : undefined;
  }

  function toNumberOrUndefined(value) {
    var text = trimOrUndefined(value);
    if (text === undefined) return undefined;

    var numberValue = Number(text);
    return Number.isNaN(numberValue) ? undefined : numberValue;
  }

  function toBoolean(value) {
    if (value === true || value === false) return value;

    var text = trimOrUndefined(value);
    if (text === undefined) return false;

    return !['0', 'false', 'off', 'no'].includes(text.toLowerCase());
  }

  function getControlValue(control) {
    if (!control || control.disabled || !control.name) return undefined;
    if (control.type === 'checkbox') return control.checked ? (control.value || 'on') : undefined;
    if (control.type === 'radio') return control.checked ? control.value : undefined;
    return control.value;
  }

  function getFormValues(form) {
    var values = {};
    if (!form || !form.elements) return values;

    Array.prototype.forEach.call(form.elements, function (control) {
      var value = getControlValue(control);
      if (value !== undefined) values[control.name] = value;
    });

    return values;
  }

  return {
    trimOrUndefined: trimOrUndefined,
    toNumberOrUndefined: toNumberOrUndefined,
    toBoolean: toBoolean,
    getFormValues: getFormValues
  };
});