// src/app.js
const express = require("express");
const cors = require("cors");
const config = require("./config/config");
const { sequelize } = require("./models");
const logger = require("./config/logger");
const requestLogger = require("./middleware/requestLogger.middleware");
const errorHandler = require("./middleware/errorHandler.middleware");
const registerRoutes = require("./routes");

const app = express();

// Middleware 설정
app.use(cors(config.cors));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
app.use(requestLogger);

// 라우트 등록
registerRoutes(app);

// 에러 핸들링
app.use(errorHandler);

const waitForDatabase = async (retries = 5, interval = 2000) => {
  for (let i = 0; i < retries; i++) {
    try {
      await sequelize.authenticate();
      logger.info("Database connection established successfully.");
      return true;
    } catch (error) {
      logger.warn(`Database connection attempt ${i + 1} failed:`, error);
      if (i < retries - 1) {
        logger.info(`Retrying in ${interval / 1000} seconds...`);
        await new Promise((resolve) => setTimeout(resolve, interval));
      }
    }
  }
  throw new Error("Could not connect to database after multiple attempts");
};

const initializeServer = async () => {
  try {
    // 데이터베이스 연결 대기
    await waitForDatabase();

    // 개발 환경에서만 데이터베이스 동기화
    if (process.env.NODE_ENV !== "production") {
      await sequelize.sync({ alert: true });
      logger.info("Database synchronized.");
     //await require("./utils/createInitialAdmin")();
    }

    // 서버 시작
    const port = config.port;
    app.listen(port, () => {
      logger.info(`Server is running on port ${port}`);
    });
  } catch (error) {
    logger.error("Unable to start server:", error);
    process.exit(1);
  }
};

initializeServer();

module.exports = app;