const express = require("express");
const app = express();
const path = require("path");
const fetch = require("node-fetch");

app.use(express.static("public")); // public 폴더 내 정적 파일 제공
app.use(express.json()); // JSON 본문 파싱

app.get("/", (req, res) => {
  const clientId =
    "16435018183-9a880bertda0en85387ge8f8mgsves71.apps.googleusercontent.com"; // 반드시 수정
  const redirectUri = "https://google-oauth-access-token-whs.hako.li/callback";

  const authUrl =
    "https://accounts.google.com/o/oauth2/v2/auth?" +
    `client_id=${clientId}` +
    `&redirect_uri=${redirectUri}` +
    `&response_type=token` +
    `&scope=email%20profile`;
  res.redirect(authUrl);
});

// Access Token 수신용 엔드포인트
app.get("/token", async (req, res) => {
  const token = req.query.access_token;
  try {
    const response = await fetch(
      "https://www.googleapis.com/oauth2/v3/userinfo",
      {
        headers: {
          Authorization: `Bearer ${token}`,
        },
      }
    );
    const userInfo = await response.json();
    console.log("Email:", userInfo.email);
    console.log("Name:", userInfo.name);
    console.log("Access Token:", token);

    res.send({
      success: true,
      timestamp: new Date().toISOString(),
      user: {
        email: userInfo.email,
        name: userInfo.name,
        picture: userInfo.picture,
      },
      tokens: {
        accessToken: token,
      },
    });
  } catch (err) {
    console.error("❌ Error:", err);
    res.status(500).send("Error");
  }
});

app.get("/callback", (req, res) => {
  res.sendFile(path.join(__dirname, "callback.html"));
});

const PORT = 39090;
app.listen(PORT, () => {
  console.log(`✅ Server running at http://localhost:${PORT}`);
});