/**
 * Sub-Store 节点名称属性注入脚本 (全自动配置驱动版)
 * 核心架构：动态按长度排序编译正则 + 智能边界识别 + O(1) 映射提取
 * 维护说明：仅需修改 featureMap 字典即可，底部逻辑永远无需改动。
 */
function operator(proxies) {
    // ================= 唯一配置区 =================
    // 在这里新增或修改关键词。格式："节点关键词": "想要注入的标签"
    // 支持大小写混合，支持包含空格或特殊符号。
    const featureMap = {
        "GTM 0.5x": "三网",
        "GTM":      "三网",
        "S1":       "广移",
        "S2":       "广电",
        "S3":       "广移",
        "S4":       "广联",
        "BGP":      "cn2",
        "Anytls":   "直连"  // 日后如果要加 IEPL，只需在这里写 "IEPL": "专线"
    };
    // ==============================================


    // ================= 核心逻辑区 (无需修改) =================

    // 1. 初始化预处理：生成稳定的查找字典 (全大写+去空格)
    // 目的：无论节点名叫 "gtm 0.5x" 还是 "GTM0.5X"，都能稳定映射
    const normalizedFeatureMap = {};
    const featureKeywords = Object.keys(featureMap);
    const normalizeFeatureKeyword = keyword => keyword.toUpperCase().replace(/\s+/g, '');
    const escapeRegexKeyword = keyword => keyword.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
    for (const featureKeyword of featureKeywords) {
        normalizedFeatureMap[normalizeFeatureKeyword(featureKeyword)] = featureMap[featureKeyword];
    }

    // 2. 动态构建复合正则表达式 (核心引擎)
    // 按字符串长度降序排序，彻底解决 "短路匹配" (Short-Circuit) 问题
    const sortedFeatureKeywords = [...featureKeywords].sort(
        (firstFeatureKeyword, secondFeatureKeyword) => secondFeatureKeyword.length - firstFeatureKeyword.length
    );

    const featureRegexParts = sortedFeatureKeywords.map(featureKeyword => {
        // 自动转义正则特殊字符 (防注入报错)
        const escapedKeywordPattern = featureKeyword.trim().split(/\s+/).filter(Boolean).map(escapeRegexKeyword).join('\\s*');

        // 智能边界处理：如果关键词首尾都是字母或数字，就追加 \b 边界
        // 这样能防止配置的 "S1" 错误匹配到 "US1" 或 "TLS1.3"
        const trimmedFeatureKeyword = featureKeyword.trim();
        if (/^[A-Za-z0-9]/.test(trimmedFeatureKeyword) && /[A-Za-z0-9]$/.test(trimmedFeatureKeyword)) {
            return `\\b${escapedKeywordPattern}\\b`;
        }
        return escapedKeywordPattern;
    });

    // 动态拼接出类似: /(GTM\s*0\.5x|\bAnytls\b|\bBGP\b|...)/i
    const featureRegex = new RegExp(`(${featureRegexParts.join('|')})`, 'i');

    // 缓存后缀匹配正则，避免循环内重复创建
    const suffixRegex = /(\s*-\s*SNTP.*)$/i;

    // 3. 执行节点遍历与注入
    return proxies.map(proxy => {
        const proxyName = proxy.name;
        if (typeof proxyName !== 'string') return proxy;

        // 单次复合正则扫描提取
        const featureMatch = proxyName.match(featureRegex);
        if (!featureMatch) return proxy; // 未命中配置库，直接放行

        // 清洗提取到的特征词，并去 O(1) 字典中取值
        const normalizedMatchedKeyword = normalizeFeatureKeyword(featureMatch[1]);
        const injectedFeatureLabel = normalizedFeatureMap[normalizedMatchedKeyword];

        if (!injectedFeatureLabel) return proxy; // 兜底安全校验

        // 格式化组装与幂等校验 (防重复注入 Bug)
        const formattedFeatureLabel = ` [${injectedFeatureLabel}]`;
        if (proxyName.includes(formattedFeatureLabel)) {
            return proxy;
        }

        // 实施中缀注入 (Infix Injection)
        if (suffixRegex.test(proxyName)) {
            proxy.name = proxyName.replace(suffixRegex, `${formattedFeatureLabel}$1`);
        } else {
            // 纯净节点无后缀时，直接挂载在末尾
            proxy.name = proxyName + formattedFeatureLabel;
        }

        return proxy;
    });
}