#!/usr/bin/env node

const fs = require('fs');
const https = require('https');
const { homedir } = require('os');
const { join } = require('path');

function httpsRequest(url, options = {}) {
  return new Promise((resolve, reject) => {
    const req = https.request(url, options, (res) => {
      let data = '';
      res.on('data', (chunk) => (data += chunk));
      res.on('end', () => {
        if (res.statusCode >= 400) {
          reject(new Error(`HTTP ${res.statusCode}: ${data}`));
        } else {
          resolve(JSON.parse(data));
        }
      });
    });
    req.on('error', reject);
    if (options.body) req.write(options.body);
    req.end();
  });
}

async function main() {
  const code = process.argv[2];
  
  if (!code) {
    console.error('❌ Usage: node exchange-code.cjs <authorization-code>');
    process.exit(1);
  }

  const credsPath = join(homedir(), '.openclaw/secrets/google-oauth.json');
  const creds = JSON.parse(fs.readFileSync(credsPath, 'utf8'));

  console.log('🔄 Exchanging authorization code for tokens...\n');

  const body = new URLSearchParams({
    client_id: creds.client_id,
    client_secret: creds.client_secret,
    code: code,
    redirect_uri: 'http://localhost:8080',
    grant_type: 'authorization_code',
  }).toString();

  const data = await httpsRequest('https://oauth2.googleapis.com/token', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/x-www-form-urlencoded',
      'Content-Length': Buffer.byteLength(body),
    },
    body,
  });

  console.log('✅ Tokens received!\n');

  // Update credentials file
  const newCreds = {
    client_id: creds.client_id,
    client_secret: creds.client_secret,
    refresh_token: data.refresh_token || creds.refresh_token,
    access_token: data.access_token,
    expiry_date: Date.now() + (data.expires_in * 1000),
  };

  fs.writeFileSync(credsPath, JSON.stringify(newCreds, null, 2));

  console.log('💾 Updated credentials saved to:');
  console.log(`   ${credsPath}\n`);
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  console.log('🎉 Google OAuth updated successfully!\n');
  console.log('Du har nu adgang til:');
  console.log('   ✅ Gmail (read + send)');
  console.log('   ✅ Google Sheets (readonly)');
  console.log('   ✅ Google Drive (readonly)\n');
}

main().catch((err) => {
  console.error('❌ Error:', err.message);
  process.exit(1);
});