// Cookie工具类
const CookieUtils = {
    /**
     * 设置Cookie
     * @param {string} name Cookie名称
     * @param {string} value Cookie值
     * @param {number} days 过期天数，默认7天
     */
    set(name, value, days = 7) {
        const expires = new Date();
        expires.setTime(expires.getTime() + days * 24 * 60 * 60 * 1000);
        document.cookie = `${name}=${encodeURIComponent(value)};expires=${expires.toUTCString()};path=/`;
    },

    /**
     * 获取Cookie
     * @param {string} name Cookie名称
     * @returns {string|null} Cookie值，不存在返回null
     */
    get(name) {
        const nameEQ = name + "=";
        const ca = document.cookie.split(';');
        for (let i = 0; i < ca.length; i++) {
            let c = ca[i];
            while (c.charAt(0) === ' ') c = c.substring(1, c.length);
            if (c.indexOf(nameEQ) === 0) {
                return decodeURIComponent(c.substring(nameEQ.length, c.length));
            }
        }
        return null;
    },

    /**
     * 删除Cookie
     * @param {string} name Cookie名称
     */
    remove(name) {
        document.cookie = `${name}=;expires=Thu, 01 Jan 1970 00:00:00 UTC;path=/;`;
    },

    /**
     * 获取JSON格式的Cookie
     * @param {string} name Cookie名称
     * @returns {any|null} 解析后的JSON对象，不存在或解析失败返回null
     */
    getJSON(name) {
        const value = this.get(name);
        if (!value) return null;
        try {
            return JSON.parse(value);
        } catch (e) {
            console.error(`Failed to parse cookie ${name}:`, e);
            return null;
        }
    },

    /**
     * 设置JSON格式的Cookie
     * @param {string} name Cookie名称
     * @param {any} value 要存储的对象
     * @param {number} days 过期天数，默认7天
     */
    setJSON(name, value, days = 7) {
        try {
            this.set(name, JSON.stringify(value), days);
        } catch (e) {
            console.error(`Failed to stringify cookie ${name}:`, e);
        }
    }
};