app.js

require("dotenv").config();
const express = require("express");
const oauthRoutes = require("./routes/oauth-request-route");
const callbackRoutes = require("./routes/get-token-route");

const app = express();
const PORT = process.env.PORT || 8080;

// ミドルウェアの設定
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// CORS設定（必要に応じて）
app.use((req, res, next) => {
  res.header("Access-Control-Allow-Origin", "*");
  res.header(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept, Authorization"
  );
  res.header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
  if (req.method === "OPTIONS") {
    res.sendStatus(200);
  } else {
    next();
  }
});

// ルートの設定 - 各ルートファイルを独立してマウント
app.use("/api/oauth", oauthRoutes);
app.use("/api/oauth", callbackRoutes);

// ヘルスチェックエンドポイント
app.get("/health", (req, res) => {
  res.json({ status: "OK", message: "OAuth server is running" });
});

// 404ハンドラー
app.use("*", (req, res) => {
  res.status(404).json({ error: "Route not found" });
});

// エラーハンドラー
app.use((error, req, res, next) => {
  console.error("Unhandled error:", error);
  res.status(500).json({
    error: "Internal server error",
    message:
      process.env.NODE_ENV === "development"
        ? error.message
        : "Something went wrong",
  });
});

// サーバーの起動
app.listen(PORT, () => {
  console.log(`OAuth server is running on port ${PORT}`);
  console.log(
    `OAuth authorization endpoint: http://localhost:${PORT}/api/oauth/authorize`
  );
  console.log(
    `OAuth callback endpoint: http://localhost:${PORT}/api/oauth/get-token`
  );
});

module.exports = app;