import { status } from "minecraft-server-util";

const MOD_API_URL = process.env.MOD_API_URL || "http://minecraft-server:8080";

// 캐시된 데이터
let cachedStatus = null;
let cachedPlayers = [];

/**
 * 모드 API에서 상태 가져오기
 */
async function fetchModStatus() {
  try {
    const response = await fetch(`${MOD_API_URL}/status`);
    if (response.ok) return await response.json();
    return null;
  } catch (error) {
    console.error("[ModAPI] 상태 조회 실패:", error.message);
    return null;
  }
}

/**
 * MOTD 가져오기 (마인크래프트 프로토콜 사용)
 */
async function fetchMotd() {
  try {
    const result = await status("minecraft-server", 25565, { timeout: 5000 });
    return {
      motd: result.motd?.html || null,
      icon: result.favicon || null,
    };
  } catch (error) {
    return { motd: null, icon: null };
  }
}

/**
 * 클라이언트용 상태 포맷 변환
 */
function formatStatusForClient(modStatus, motdData) {
  if (!modStatus) {
    return {
      online: false,
      motd: null,
      players: { current: 0, max: 0, list: [] },
      version: "Unknown",
      icon: null,
      uptime: "오프라인",
      tps: 0,
      mspt: 0,
      memoryUsedMb: 0,
      memoryMaxMb: 0,
    };
  }

  const uptimeMinutes = modStatus.uptimeMinutes || 0;
  const days = Math.floor(uptimeMinutes / 1440);
  const hours = Math.floor((uptimeMinutes % 1440) / 60);
  const minutes = uptimeMinutes % 60;

  let uptime;
  if (days > 0) uptime = `${days}일 ${hours}시간`;
  else if (hours > 0) uptime = `${hours}시간 ${minutes}분`;
  else uptime = `${minutes}분`;

  return {
    online: modStatus.online,
    motd: motdData?.motd || null,
    icon: motdData?.icon || null,
    players: {
      current: modStatus.players?.current || 0,
      max: modStatus.players?.max || 20,
      list:
        modStatus.players?.online?.map((p) => ({
          name: p.name,
          uuid: p.uuid,
          id: p.uuid,
          isOp: p.isOp,
        })) || [],
    },
    version: modStatus.version || "Unknown",
    modLoader: modStatus.modLoader || null,
    uptime: modStatus.online ? uptime : "오프라인",
    difficulty: modStatus.difficulty || "알 수 없음",
    gameRules: modStatus.gameRules || {},
    mods: modStatus.mods || [],
    tps: modStatus.tps || 0,
    mspt: modStatus.mspt || 0,
    memoryUsedMb: modStatus.memoryUsedMb || 0,
    memoryMaxMb: modStatus.memoryMaxMb || 0,
  };
}

/**
 * 전체 플레이어 목록 조회
 */
async function fetchAllPlayers() {
  try {
    const response = await fetch(`${MOD_API_URL}/players`);
    if (response.ok) {
      const data = await response.json();
      return data.players || [];
    }
    return [];
  } catch (error) {
    console.error("[ModAPI] 플레이어 목록 조회 실패:", error.message);
    return [];
  }
}

/**
 * 특정 플레이어 정보 조회
 */
async function fetchPlayerDetail(uuid) {
  try {
    const response = await fetch(`${MOD_API_URL}/player/${uuid}`);
    if (response.ok) return await response.json();
    return null;
  } catch (error) {
    console.error("[ModAPI] 플레이어 조회 실패:", error.message);
    return null;
  }
}

/**
 * 주기적 데이터 갱신
 */
async function refreshData() {
  const [modStatus, motdData, players] = await Promise.all([
    fetchModStatus(),
    fetchMotd(),
    fetchAllPlayers(),
  ]);

  cachedStatus = formatStatusForClient(modStatus, motdData);
  cachedPlayers = players;

  return { cachedStatus, cachedPlayers };
}

const getCachedStatus = () => cachedStatus;
const getCachedPlayers = () => cachedPlayers;

export {
  MOD_API_URL,
  fetchModStatus,
  fetchMotd,
  formatStatusForClient,
  fetchAllPlayers,
  fetchPlayerDetail,
  refreshData,
  getCachedStatus,
  getCachedPlayers,
};