// 示例：获取访问令牌
const axios = require('axios');
const qs = require('querystring');

const client_id = 'YOUR_CLIENT_ID';
const client_secret = 'YOUR_CLIENT_SECRET';

async function getAccessToken() {
  const authOptions = {
    method: 'post',
    url: 'https://accounts.spotify.com/api/token',
    headers: {
      'Authorization': 'Basic ' + Buffer.from(client_id + ':' + client_secret).toString('base64'),
      'Content-Type': 'application/x-www-form-urlencoded'
    },
    data: qs.stringify({
      grant_type: 'client_credentials'
    })
  };

  try {
    const response = await axios(authOptions);
    return response.data.access_token;
  } catch (error) {
    console.error('Error getting access token:', error);
    throw error;
  }
}

async function addTracksToPlaylist(accessToken, playlistId, trackUris) {
  const url = `https://api.spotify.com/v1/playlists/${playlistId}/tracks`;
  
  const options = {
    method: 'post',
    url: url,
    headers: {
      'Authorization': `Bearer ${accessToken}`,
      'Content-Type': 'application/json'
    },
    data: {
      uris: trackUris,
      position: 0
    }
  };

  try {
    const response = await axios(options);
    return response.data;
  } catch (error) {
    console.error('Error adding tracks:', error.response ? error.response.data : error);
    throw error;
  }
}

// 使用示例
(async () => {
  try {
    const accessToken = await getAccessToken();
    const playlistId = 'YOUR_PLAYLIST_ID';
    const trackUris = [
      'spotify:track:4iV5W9uYEdYUVa79Axb7Rh',
      'spotify:track:1301WleyT98MSxVHPZCA6M'
    ];
    
    const result = await addTracksToPlaylist(accessToken, playlistId, trackUris);
    console.log('Tracks added successfully:', result);
  } catch (error) {
    console.error('Failed to add tracks:', error);
  }
})();