import mysql from "mysql2/promise";

// MariaDB 연결 풀 - 환경변수에서 로드
const dbPool = mysql.createPool({
  host: process.env.DB_HOST,
  user: process.env.DB_USER,
  password: process.env.DB_PASSWORD,
  database: process.env.DB_NAME,
  waitForConnections: true,
  connectionLimit: 10,
  queueLimit: 0,
});

// 캐시 데이터
let translationsCache = {};
let iconsCache = {}; // { "type:name": iconUrl } - 타입별로 구분
let gamerulesCache = {};

/**
 * 번역 및 아이콘 데이터 로드 (blocks, items, entities 테이블에서)
 */
async function loadTranslations() {
  try {
    const [blocks] = await dbPool.query(
      "SELECT name, name_ko, icon FROM blocks WHERE mod_id = 'minecraft'"
    );
    const [items] = await dbPool.query(
      "SELECT name, name_ko, icon FROM items WHERE mod_id = 'minecraft'"
    );
    const [entities] = await dbPool.query(
      "SELECT name, name_ko, icon FROM entities WHERE mod_id = 'minecraft'"
    );
    const [gamerules] = await dbPool.query(
      "SELECT name, name_ko, description_ko FROM gamerules WHERE mod_id = 'minecraft'"
    );

    // 캐시 초기화
    translationsCache = {};
    iconsCache = {};

    // blocks, items, entities를 캐시에 저장 (type:name 형식으로 구분)
    blocks.forEach((row) => {
      translationsCache[row.name] = row.name_ko;
      if (row.icon) iconsCache[`block:${row.name}`] = row.icon;
    });
    items.forEach((row) => {
      translationsCache[row.name] = row.name_ko;
      if (row.icon) iconsCache[`item:${row.name}`] = row.icon;
    });
    entities.forEach((row) => {
      translationsCache[row.name] = row.name_ko;
      if (row.icon) iconsCache[`entity:${row.name}`] = row.icon;
    });

    // gamerules 캐시
    gamerulesCache = {};
    gamerules.forEach((row) => {
      gamerulesCache[row.name] = {
        name: row.name_ko || row.name,
        description: row.description_ko || "",
      };
    });

    const iconCount = Object.keys(iconsCache).length;
    console.log(
      `[DB] 번역 데이터 로드 완료: blocks ${blocks.length}개, items ${items.length}개, entities ${entities.length}개, icons ${iconCount}개`
    );
  } catch (error) {
    console.error("[DB] 번역 데이터 로드 실패:", error.message);
  }
}

// 캐시 접근 함수
const getTranslations = () => translationsCache;
const getIcons = () => iconsCache;
const getGamerules = () => gamerulesCache;
const setIconCache = (key, value) => {
  iconsCache[key] = value;
};

/**
 * 모드팩 테이블 초기화
 */
async function initModpacksTable() {
  try {
    await dbPool.query(`
      CREATE TABLE IF NOT EXISTS modpacks (
        id INT AUTO_INCREMENT PRIMARY KEY,
        name VARCHAR(255) NOT NULL,
        version VARCHAR(50) NOT NULL,
        minecraft_version VARCHAR(20),
        mod_loader VARCHAR(50),
        changelog TEXT,
        file_key VARCHAR(500) NOT NULL,
        file_size BIGINT DEFAULT 0,
        original_filename VARCHAR(255),
        contents_json LONGTEXT,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
        UNIQUE KEY unique_version (name, version)
      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
    `);
    console.log("[DB] modpacks 테이블 초기화 완료");
  } catch (error) {
    console.error("[DB] modpacks 테이블 초기화 실패:", error.message);
  }
}

export {
  dbPool,
  dbPool as pool,
  loadTranslations,
  getTranslations,
  getIcons,
  getGamerules,
  setIconCache,
  initModpacksTable,
};