const express = require('express');
const bodyParser = require('body-parser');
const axios = require('axios');
const { default: Axios } = require('axios');

const PORT = process.env.PORT || '5001';
const SPOTIFY_CLIENT_SECRET = process.env.SPOTIFY_CLIENT_SECRET;
const SPOTIFY_CLIENT_ID = process.env.SPOTIFY_CLIENT_ID;
if (!SPOTIFY_CLIENT_SECRET || !SPOTIFY_CLIENT_ID) {
  console.log("SPOTIFY_CLIENT_SECRET or SPOTIFY_CLIENT_ID environment variable is not set!");
  process.exit(1);
}

const app = express();
app.use(bodyParser.urlencoded({ extended: true }));

app.post('/swap', async (req, res) => {
  const { code } = req.body;

  const params = new URLSearchParams();
  params.append('grant_type', 'authorization_code');
  params.append('code', code);
  params.append('redirect_uri', 'http://localhost:5000/callback');
  params.append('client_secret', SPOTIFY_CLIENT_SECRET);
  params.append('client_id', SPOTIFY_CLIENT_ID);

  const { data } = await Axios.post('https://accounts.spotify.com/api/token', params);

  return res.send(data);
});

app.post('/refresh', async (req, res) => {
  const { refresh_token } = req.body;

  const params = new URLSearchParams();
  params.append('grant_type', 'refresh_token');
  params.append('refresh_token', refresh_token);
  params.append('client_secret', SPOTIFY_CLIENT_SECRET);
  params.append('client_id', SPOTIFY_CLIENT_ID);

  const { data } = await Axios.post('https://accounts.spotify.com/api/token', params);

  return res.send(data);
});

app.listen(PORT, () => {
  console.log(`Server listening on ${PORT} 🚀`);
});