server.js

import dotenv from "dotenv";
dotenv.config();
import express from "express";
import cors from "cors";
import cookieParser from "cookie-parser";
import connectDB from "./config/connectdb.js";
import passport from "passport";
import userRoutes from "./routes/userRoutes.js";
import "./config/passport-jwt-strategy.js";
import setTokensCookies from "./utils/setTokensCookies.js";
import "./config/google-strategy.js"; // Added for google auth
import postRouter from "./routes/postRouter.js";

const app = express();
const port = process.env.PORT;
const DATABASE_URL = process.env.DATABASE_URL;
// This will solve CORS Policy Error
const corsOptions = {
  // set origin to a specific origin.
  origin: process.env.FRONTEND_HOST,
  credentials: true,
  optionsSuccessStatus: 200,
};
app.use(cors(corsOptions));

// Database Connection
connectDB(DATABASE_URL);

// JSON
app.use(express.json());

// Passport Middleware
app.use(passport.initialize());

// Cookie Parser
app.use(cookieParser());

// Load Routes
app.get("/", (req, res) => {
  res.send({ success: true, message: "Hello World!" });
});
app.use("/api/user", userRoutes);
app.use("/api", postRouter);

// Google Auth Routes
app.get(
  "/auth/google",
  passport.authenticate("google", {
    session: false,
    scope: ["profile", "email"],
  })
);

app.get(
  "/auth/google/callback",
  passport.authenticate("google", {
    session: false,
    failureRedirect: `${process.env.FRONTEND_HOST}`,
  }),
  (req, res) => {
    // Access user object and tokens from req.user
    const { user, accessToken, refreshToken, accessTokenExp, refreshTokenExp } =
      req.user;
    setTokensCookies(
      res,
      accessToken,
      refreshToken,
      accessTokenExp,
      refreshTokenExp
    );

    // Successful authentication, redirect home.
    res.redirect(`${process.env.FRONTEND_HOST}`);
  }
);

app.listen(port, () => {
  console.log(`Server listening at http://localhost:${port}`);
});