/**
 * Sub-Store operator: Normalize + tag + country detect + per-country numbering
 *
 * Output format (default):
 *   🇺🇸 USA-01 🔒 📺 ❻ ▫️ws/vless/443
 *
 * Notes:
 * - Numbering is computed per-country AFTER grouping the full list.
 * - Tags (icons) do NOT affect numbering order.
 * - GeoIP is optional and only used when server is an IP and utils.geoip.lookup exists.
 */

///////////////////////
// CONFIG (EDIT ME)
///////////////////////

// 1) Remove these patterns (marketing noise, brackets, separators, etc.)
const NOISE_PATTERNS = [
  /\[[^\]]*]/g,          // [ ... ]
  /\([^)]*\)/g,          // ( ... )
  /\{[^}]*}/g,           // { ... }
  /\btraffic\b/gi,
  /\bfree\b/gi,
  /\bwebsite\b/gi,
  /\bexpire\b/gi,
  /\blow\s*ping\b/gi,
  /\bai\s*studio\b/gi,
  /\bno\s*p2p\b/gi,
  /\b10\s*gbit\b/gi,
  /\bvless\b/gi,         // you said you don't want it in the visible name
  /\bvmess\b/gi,
  /\bssr?\b/gi,
  /\btrojan\b/gi,
  /\bhysteria2?\b/gi,
  /\btuic\b/gi,
  /[|]/g,
  /[_]+/g,
  /[-]{2,}/g
];

// 2) Keyword -> icon tags (if found in original name, icon is added; the keyword is removed from base name)
const ICON_RULES = [
  { regex: /\bYT\b/gi, icon: "📺" },
  { regex: /\bIPv6\b/gi, icon: "❻" },
  { regex: /\bNetflix\b|\bNF\b/gi, icon: "🎬" },
  { regex: /\bDisney\+?\b|\bDSNY\b/gi, icon: "🏰" },
  { regex: /\bHBO\b/gi, icon: "📼" },
  { regex: /\bPrime\b|\bAmazon\b/gi, icon: "📦" },
  { regex: /\bChatGPT\b|\bOpenAI\b/gi, icon: "🤖" },
  { regex: /\bSteam\b/gi, icon: "🎮" },
];

// 3) Optional “network” tag rules based on NAME text (not $server.network)
// (Useful if providers shove "BGP/IPLC" into the node name)
const NAME_NETWORK_TAGS = [
  { regex: /\bIPLC\b/gi, tag: "🛰️" },
  { regex: /\bBGP\b/gi, tag: "🧭" },
  { regex: /\bAnycast\b/gi, tag: "🌍" }
];

// 4) Country detection rules by NAME (regex). First match wins (priority = lower is earlier)
const COUNTRY_RULES = [
  // USA
  { regex: /\b(USA|US|UNITED\s*STATES|AMERICA|NEW\s*YORK|NYC|LOS\s*ANGELES|LA|DALLAS|CHI(CAGO)?)\b/i, iso3: "USA", flag: "🇺🇸", priority: 10 },

  // Germany
  { regex: /\b(DE|DEU|GER(MANY)?|FRANKFURT|BERLIN|MUNICH|MÜNCHEN)\b/i, iso3: "DEU", flag: "🇩🇪", priority: 20 },

  // Netherlands
  { regex: /\b(NL|NLD|NETHERLANDS|HOLLAND|AMSTERDAM)\b/i, iso3: "NLD", flag: "🇳🇱", priority: 30 },

  // UK
  { regex: /\b(UK|GB|GBR|UNITED\s*KINGDOM|LONDON|MANCHESTER)\b/i, iso3: "GBR", flag: "🇬🇧", priority: 40 },

  // France
  { regex: /\b(FR|FRA|FRANCE|PARIS|MARSEILLE)\b/i, iso3: "FRA", flag: "🇫🇷", priority: 50 },

  // Poland
  { regex: /\b(PL|POL|POLAND|WARSAW|WARSZAWA)\b/i, iso3: "POL", flag: "🇵🇱", priority: 60 },

  // Finland
  { regex: /\b(FI|FIN|FINLAND|HELSINKI)\b/i, iso3: "FIN", flag: "🇫🇮", priority: 70 },

  // Sweden
  { regex: /\b(SE|SWE|SWEDEN|STOCKHOLM)\b/i, iso3: "SWE", flag: "🇸🇪", priority: 80 },

  // Norway
  { regex: /\b(NO|NOR|NORWAY|OSLO)\b/i, iso3: "NOR", flag: "🇳🇴", priority: 90 },

  // Switzerland
  { regex: /\b(CH|CHE|SWITZERLAND|ZURICH|GENEVA)\b/i, iso3: "CHE", flag: "🇨🇭", priority: 100 },

  // Estonia / Latvia / Lithuania
  { regex: /\b(EE|EST|ESTONIA|TALLINN)\b/i, iso3: "EST", flag: "🇪🇪", priority: 110 },
  { regex: /\b(LV|LVA|LATVIA|RIGA)\b/i, iso3: "LVA", flag: "🇱🇻", priority: 120 },
  { regex: /\b(LT|LTU|LITHUANIA|VILNIUS)\b/i, iso3: "LTU", flag: "🇱🇹", priority: 130 },

  // Turkey
  { regex: /\b(TR|TUR|TURKEY|ISTANBUL)\b/i, iso3: "TUR", flag: "🇹🇷", priority: 140 },

  // Singapore / Japan / Korea / Hong Kong
  { regex: /\b(SG|SGP|SINGAPORE)\b/i, iso3: "SGP", flag: "🇸🇬", priority: 200 },
  { regex: /\b(JP|JPN|JAPAN|TOKYO|OSAKA)\b/i, iso3: "JPN", flag: "🇯🇵", priority: 210 },
  { regex: /\b(KR|KOR|KOREA|SEOUL)\b/i, iso3: "KOR", flag: "🇰🇷", priority: 220 },
  { regex: /\b(HK|HKG|HONG\s*KONG)\b/i, iso3: "HKG", flag: "🇭🇰", priority: 230 },
];

// 5) GeoIP mapping (ISO2 -> ISO3 + flag) used only if utils.geoip.lookup(ip) returns ISO2
const ISO2_TO_ISO3 = {
  US: { iso3: "USA", flag: "🇺🇸" },
  DE: { iso3: "DEU", flag: "🇩🇪" },
  NL: { iso3: "NLD", flag: "🇳🇱" },
  GB: { iso3: "GBR", flag: "🇬🇧" },
  FR: { iso3: "FRA", flag: "🇫🇷" },
  PL: { iso3: "POL", flag: "🇵🇱" },
  FI: { iso3: "FIN", flag: "🇫🇮" },
  SE: { iso3: "SWE", flag: "🇸🇪" },
  NO: { iso3: "NOR", flag: "🇳🇴" },
  CH: { iso3: "CHE", flag: "🇨🇭" },
  EE: { iso3: "EST", flag: "🇪🇪" },
  LV: { iso3: "LVA", flag: "🇱🇻" },
  LT: { iso3: "LTU", flag: "🇱🇹" },
  TR: { iso3: "TUR", flag: "🇹🇷" },
  SG: { iso3: "SGP", flag: "🇸🇬" },
  JP: { iso3: "JPN", flag: "🇯🇵" },
  KR: { iso3: "KOR", flag: "🇰🇷" },
  HK: { iso3: "HKG", flag: "🇭🇰" },
};

// 6) Protocol icons (based on proxy.type)
const PROTOCOL_ICONS = {
  ss: "🔒",
  ssr: "☂️",
  vmess: "🪁",
  vless: "🌌",
  trojan: "🐎",
  http: "🌐",
  socks5: "🧦",
  snell: "🐌",
  wireguard: "🐲",
  hysteria: "🤪",
  hysteria2: "⚡",
  tuic: "🚅"
};

///////////////////////
// HELPERS
///////////////////////

function isIPv4(str) {
  if (typeof str !== "string") return false;
  const m = str.match(/^(\d{1,3})(\.\d{1,3}){3}$/);
  if (!m) return false;
  return str.split(".").every(oct => {
    const n = Number(oct);
    return n >= 0 && n <= 255 && String(n) === oct.replace(/^0+(\d)/, "$1"); // avoids "001" weirdness
  });
}

function uniq(arr) {
  return [...new Set(arr.filter(Boolean))];
}

function sanitizeBaseName(name) {
  let s = String(name || "");

  // Remove noise patterns
  for (const re of NOISE_PATTERNS) s = s.replace(re, " ");

  // Collapse spaces
  s = s.replace(/\s+/g, " ").trim();
  return s;
}

function extractIconTagsAndStrip(name) {
  let s = String(name || "");
  const tags = [];

  for (const r of ICON_RULES) {
    if (r.regex.test(s)) {
      tags.push(r.icon);
      s = s.replace(r.regex, " ");
    }
  }

  for (const t of NAME_NETWORK_TAGS) {
    if (t.regex.test(s)) {
      tags.push(t.tag);
      s = s.replace(t.regex, " ");
    }
  }

  return { stripped: s.replace(/\s+/g, " ").trim(), tags: uniq(tags) };
}

function detectCountryByName(name) {
  const n = String(name || "");
  // Order by priority, then first match wins
  const sorted = COUNTRY_RULES.slice().sort((a, b) => a.priority - b.priority);
  for (const c of sorted) {
    if (c.regex.test(n)) return { iso3: c.iso3, flag: c.flag, priority: c.priority, source: "name" };
  }
  return null;
}

function detectCountryByGeoIP(server, utils) {
  if (!isIPv4(server)) return null;
  if (!utils || !utils.geoip || typeof utils.geoip.lookup !== "function") return null;

  try {
    const geo = utils.geoip.lookup(server);
    const iso2 = geo && (geo.country || geo.country_code || geo.iso_code);
    if (!iso2 || typeof iso2 !== "string") return null;

    const key = iso2.toUpperCase();
    const mapped = ISO2_TO_ISO3[key];
    if (mapped) return { iso3: mapped.iso3, flag: mapped.flag, priority: 900, source: "geoip" };

    // Unknown ISO2: keep something sane
    return { iso3: key, flag: "🏳️", priority: 950, source: "geoip" };
  } catch (e) {
    return null;
  }
}

function pad2(n) {
  const x = Number(n);
  return x < 10 ? `0${x}` : String(x);
}

function safeStr(v) {
  return (v === undefined || v === null) ? "" : String(v);
}

///////////////////////
// OPERATOR
///////////////////////

function operator(proxies, targetPlatform, utils) {
  // Sub-Store sometimes passes utils as global $utils; sometimes as 3rd arg; sometimes not at all.
  // We'll accept any of them without whining.
  const U = utils || (typeof $utils !== "undefined" ? $utils : null);

  const buckets = Object.create(null);

  for (const proxy of proxies) {
    const originalName = safeStr(proxy && proxy.name);

    // 1) Extract tags (icons) from ORIGINAL name, then strip those keywords out
    const iconStage = extractIconTagsAndStrip(originalName);

    // 2) Sanitize remaining base name (remove marketing trash, brackets, etc.)
    const cleanBase = sanitizeBaseName(iconStage.stripped);

    // 3) Detect country (name first, then GeoIP)
    const byName = detectCountryByName(originalName);
    const byGeo = detectCountryByGeoIP(proxy && proxy.server, U);
    const country = byName || byGeo || { iso3: "UNK", flag: "🏴‍☠️", priority: 9999, source: "fallback" };

    // 4) Protocol icon (based on type)
    const proto = PROTOCOL_ICONS[(proxy && proxy.type) || ""] || "🔌";

    // 5) Network/type/port tag (from proxy fields)
    const net = safeStr(proxy && proxy.network) || "net?";
    const typ = safeStr(proxy && proxy.type) || "type?";
    const port = safeStr(proxy && proxy.port) || "port?";
    const metaTag = `▫️${net}/${typ}/${port}`;

    // 6) Prepare bucket key
    const key = country.iso3;

    if (!buckets[key]) {
      buckets[key] = {
        country,
        list: []
      };
    }

    // Keep meta used for sorting and final formatting
    buckets[key].list.push({
      proxy,
      _meta: {
        cleanBase,
        iconTags: iconStage.tags,
        proto,
        metaTag
      }
    });
  }

  // 7) Sort buckets by priority
  const bucketKeys = Object.keys(buckets).sort((a, b) => {
    return (buckets[a].country.priority || 9999) - (buckets[b].country.priority || 9999);
  });

  // 8) Sort inside each country bucket and rename with per-country numbering
  const result = [];

  for (const key of bucketKeys) {
    const group = buckets[key];

    group.list.sort((A, B) => {
      // Tags do not affect numbering: sort only by sanitized base + server:port as tie-breaker
      const an = A._meta.cleanBase.toLowerCase();
      const bn = B._meta.cleanBase.toLowerCase();
      if (an !== bn) return an.localeCompare(bn);

      const as = `${safeStr(A.proxy.server)}:${safeStr(A.proxy.port)}`;
      const bs = `${safeStr(B.proxy.server)}:${safeStr(B.proxy.port)}`;
      return as.localeCompare(bs);
    });

    for (let i = 0; i < group.list.length; i++) {
      const item = group.list[i];
      const p = item.proxy;
      const num = pad2(i + 1);

      const tagStr = item._meta.iconTags.length ? ` ${item._meta.iconTags.join(" ")}` : "";
      // Final name format:
      // 🇩🇪 DEU-03 🌌 📺 ❻ ▫️ws/vless/443
      p.name = `${group.country.flag} ${group.country.iso3}-${num} ${item._meta.proto}${tagStr} ${item._meta.metaTag}`.replace(/\s+/g, " ").trim();

      result.push(p);
    }
  }

  return result;
}