/**
 * 设置Cookie
 * @param {Object} cookieMap为要添加的对象
 * 格式为:
 * {
 *    name: '11',
 *    age: '1111'
 * }
 * @returns 返回当前cookie对象
 * @module Cookie
 */
const setCookie = (cookieMap: object) => {
  for (let key in cookieMap) {
    document.cookie = key + "=" + cookieMap[key];
  }
  return document.cookie;
};

/**
 *获取字段值
 * @param {String} name 要获取的字段
 * @returns 存在时，返回相应的值；不存在时，返回null
 * @module Cookie
 */
const getCookie = (name: string) => {
  const cookie = document.cookie;
  if (cookie.length > 0) {
    if (name) {
      const reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
      const result = cookie.match(reg);
      return result?.[2] || null;
    }
    return null;
  }

  return null;
};

/**
 * 删除某个cookie字段
 * @param {*} name 要删除的字段
 * @returns 删除成功，返回true；删除失败，返回false
 * @module Cookie
 */
const deleteCookie = (name: string) => {
  if (document.cookie.length > 0) {
    const exp = new Date();
    exp.setTime(exp.getTime() - 1);
    const cval = getCookie(name);
    if (cval != null)
      document.cookie = name + "=" + cval + ";expires=" + exp.toUTCString();
    return true;
  }
  return false;
};

/**
 *清除整个cookie
 * @returns 成功返回true，失败返回false
 * @module Cookie
 */
const clearCookie = () => {
  const keys = document.cookie.match(/[^ =;]+(?=\=)/g);
  if (keys) {
    keys.forEach((key) => deleteCookie(key));
    return true;
  }
  return false;
};
export { setCookie, getCookie, deleteCookie, clearCookie };