import "dotenv/config";
import express from "express";
import cors from "cors";
import helmet from "helmet";
import compression from "compression";
import rateLimit from "express-rate-limit";
import path from "path";
import config from "./config/environment";
import { logger } from "./utils/logger";
import { errorHandler } from "./middleware/errorHandler";

// 라우터 임포트
import authRoutes from "./routes/authRoutes";
import adminRoutes from "./routes/adminRoutes";
import multilangRoutes from "./routes/multilangRoutes";
import tableManagementRoutes from "./routes/tableManagementRoutes";
import entityJoinRoutes from "./routes/entityJoinRoutes";
import screenManagementRoutes from "./routes/screenManagementRoutes";
import commonCodeRoutes from "./routes/commonCodeRoutes";
import dynamicFormRoutes from "./routes/dynamicFormRoutes";
import fileRoutes from "./routes/fileRoutes";
import companyManagementRoutes from "./routes/companyManagementRoutes";
// import dataflowRoutes from "./routes/dataflowRoutes"; // 임시 주석
import dataflowDiagramRoutes from "./routes/dataflowDiagramRoutes";
import webTypeStandardRoutes from "./routes/webTypeStandardRoutes";
import buttonActionStandardRoutes from "./routes/buttonActionStandardRoutes";
import screenStandardRoutes from "./routes/screenStandardRoutes";
import templateStandardRoutes from "./routes/templateStandardRoutes";
import componentStandardRoutes from "./routes/componentStandardRoutes";
import layoutRoutes from "./routes/layoutRoutes";
import dataRoutes from "./routes/dataRoutes";
import testButtonDataflowRoutes from "./routes/testButtonDataflowRoutes";
import externalDbConnectionRoutes from "./routes/externalDbConnectionRoutes";
// import userRoutes from './routes/userRoutes';
// import menuRoutes from './routes/menuRoutes';

const app = express();

// 기본 미들웨어
app.use(helmet());
app.use(compression());
app.use(express.json({ limit: "10mb" }));
app.use(express.urlencoded({ extended: true, limit: "10mb" }));

// 정적 파일 서빙 (업로드된 파일들)
app.use(
  "/uploads",
  express.static(path.join(process.cwd(), "uploads"), {
    setHeaders: (res, path) => {
      // 파일 서빙 시 CORS 헤더 설정
      res.setHeader("Access-Control-Allow-Origin", "*");
      res.setHeader("Access-Control-Allow-Methods", "GET, OPTIONS");
      res.setHeader(
        "Access-Control-Allow-Headers",
        "Content-Type, Authorization"
      );
      res.setHeader("Cache-Control", "public, max-age=3600");
    },
  })
);

// CORS 설정 - environment.ts에서 이미 올바른 형태로 처리됨
app.use(
  cors({
    origin: config.cors.origin, // 이미 배열 또는 boolean으로 처리됨
    credentials: config.cors.credentials,
    methods: ["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
    allowedHeaders: [
      "Content-Type",
      "Authorization",
      "X-Requested-With",
      "Accept",
      "Origin",
      "Access-Control-Request-Method",
      "Access-Control-Request-Headers",
    ],
    preflightContinue: false,
    optionsSuccessStatus: 200,
  })
);

// Rate Limiting (개발 환경에서는 완화)
const limiter = rateLimit({
  windowMs: 1 * 60 * 1000, // 1분
  max: config.nodeEnv === "development" ? 1000 : 100, // 개발환경에서는 1000, 운영환경에서는 100
  message: {
    error: "너무 많은 요청이 발생했습니다. 잠시 후 다시 시도해주세요.",
  },
  skip: (req) => {
    // 헬스 체크는 Rate Limiting 제외
    return req.path === "/health";
  },
});
app.use("/api/", limiter);

// 헬스 체크 엔드포인트
app.get("/health", (req, res) => {
  res.status(200).json({
    status: "OK",
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    environment: config.nodeEnv,
  });
});

// API 라우터
app.use("/api/auth", authRoutes);
app.use("/api/admin", adminRoutes);
app.use("/api/multilang", multilangRoutes);
app.use("/api/table-management", tableManagementRoutes);
app.use("/api/table-management", entityJoinRoutes); // 🎯 Entity 조인 기능
app.use("/api/screen-management", screenManagementRoutes);
app.use("/api/common-codes", commonCodeRoutes);
app.use("/api/dynamic-form", dynamicFormRoutes);
app.use("/api/files", fileRoutes);
app.use("/api/company-management", companyManagementRoutes);
// app.use("/api/dataflow", dataflowRoutes); // 임시 주석
app.use("/api/dataflow-diagrams", dataflowDiagramRoutes);
app.use("/api/admin/web-types", webTypeStandardRoutes);
app.use("/api/admin/button-actions", buttonActionStandardRoutes);
app.use("/api/admin/template-standards", templateStandardRoutes);
app.use("/api/admin/component-standards", componentStandardRoutes);
app.use("/api/layouts", layoutRoutes);
app.use("/api/screen", screenStandardRoutes);
app.use("/api/data", dataRoutes);
app.use("/api/test-button-dataflow", testButtonDataflowRoutes);
app.use("/api/external-db-connections", externalDbConnectionRoutes);
// app.use('/api/users', userRoutes);
// app.use('/api/menus', menuRoutes);

// 404 핸들러
app.use("*", (req, res) => {
  res.status(404).json({
    success: false,
    message: "요청한 리소스를 찾을 수 없습니다.",
    path: req.originalUrl,
  });
});

// 에러 핸들러
app.use(errorHandler);

// 서버 시작
const PORT = config.port;
const HOST = config.host;

app.listen(PORT, HOST, () => {
  logger.info(`🚀 Server is running on ${HOST}:${PORT}`);
  logger.info(`📊 Environment: ${config.nodeEnv}`);
  logger.info(`🔗 Health check: http://${HOST}:${PORT}/health`);
  logger.info(`🌐 External access: http://39.117.244.52:${PORT}/health`);
});

export default app;