/*const COOKIE_EXPIRES_DAYS = 7;

export const getNativeCookie = (name: string): string | null => {
  if (typeof document === "undefined") return null;

  const cookies = document.cookie.split("; ").map((c) => c.trim());
  const found = cookies.find((c) => c.startsWith(name + "="));
  return found ? decodeURIComponent(found.split("=")[1]) : null;
};

export const getCookie = (name: string): string | null => {
  if (typeof document === "undefined") return null;

  const match = document.cookie.match(new RegExp("(^| )" + name + "=([^;]+)"));
  return match ? decodeURIComponent(match[2]) : null;
};

export const setCookie = (
    name: string, 
    value: string | number, 
    { days = COOKIE_EXPIRES_DAYS, isEncode = false }: { days?: number; isEncode?: boolean } = {}
) => {
  if (typeof document === "undefined") return;
  const d = new Date();
  d.setTime(d.getTime() + days * 24 * 60 * 60 * 1000);
  // const expires = new Date(Date.now() + days * 864e5).toUTCString();
  const expires = d.toUTCString();
  const val = isEncode ? encodeURIComponent(String(value)) : value;
  document.cookie = `${name}=${val}; expires=${expires}; path=/`;
};

export const deleteCookie = (name: string) => {
  if (typeof document === "undefined") return;
  document.cookie = `${name}=; Max-Age=0; path=/`;
};
*/
import {GUEST_COOKIE_OPTION} from "@/utils/constants";
// cookie.ts

export interface CookieOptions {
  /** 过期天数（从当前时间起算），默认 7 天 */
  maxAge?: number;
  /** 是否需要对值进行编码（encodeURIComponent），默认 false */
  encode?: boolean;
  /** Cookie 路径，默认 '/' */
  path?: string;
  /** Cookie 域名 */
  domain?: string;
  /** 是否仅 HTTPS 传输 */
  secure?: boolean;
  /** SameSite 属性 */
  sameSite?: 'Strict' | 'Lax' | 'None';
}

// 对正则特殊字符进行转义，避免名称中的特殊字符导致匹配错误
function escapeRegExp(string: string): string {
  return string.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
}

/**
 * 获取指定名称的 cookie 值
 * 解决了值中包含等号的问题，并对名称中的正则特殊字符做了转义
 */
export function getCookie(name: string): string | null {
  if (typeof document === 'undefined') return null;

  const escapedName = escapeRegExp(name);
  // 在 document.cookie 开头或分号后的空格之后匹配名称，值部分匹配到下一个分号或结束
  const regex = new RegExp(`(?:^|;\\s*)${escapedName}=([^;]*)`);
  const match = document.cookie.match(regex);
  
  return match ? decodeURIComponent(match[1]) : null;
}

/**
 * 设置 cookie
 * 默认对值进行编码以保证安全存储，可通过 options.encode = false 关闭
 */
export function setCookie(
  name: string,
  value: string | number | boolean,
  options: CookieOptions = {}
): void {
  if (typeof document === 'undefined') return;
  const setOption = Object.assign({},GUEST_COOKIE_OPTION,options);
  const {
    maxAge,
    encode,          // 默认编码，更加安全
    path,
    domain,
    secure,
    sameSite,
  } = setOption;

  // 处理过期时间
  const expires = new Date(Date.now() + maxAge * 1000).toUTCString();

  // 处理值：编码或直接转换
  const val = encode
    ? encodeURIComponent(String(value))
    : String(value);

  // 构建 cookie 字符串
  let cookie = `${name}=${val}; expires=${expires}; path=${path}`;
  if (domain) cookie += `; domain=${domain}`;
  if (secure) cookie += '; secure';
  if (sameSite) cookie += `; samesite=${sameSite}`;

  document.cookie = cookie;
}

/**
 * 删除指定名称的 cookie
 * 通过设置 Max-Age=0 并匹配 path/domain 等属性来确保删除
 */
export function deleteCookie(
  name: string,
  options: Pick<CookieOptions, 'path' | 'domain' | 'secure'> = {}
): void {
  if (typeof document === 'undefined') return;
  const {
    path: defaultPath,
    secure: defaultSecure
  } = GUEST_COOKIE_OPTION;
  const { domain } = options;

  const path = options.path || defaultPath;
  const secure = options.secure || defaultSecure;

  // 若删除时指定了 domain 或 secure，需要与设置时一致才能删除成功
  let cookie = `${name}=; Max-Age=0; path=${path}`;
  if (domain) cookie += `; domain=${domain}`;
  if (secure) cookie += '; secure';

  document.cookie = cookie;
}