import fs from 'node:fs/promises';
import path from 'node:path';

const args = process.argv.slice(2);
const discordRoot = args.includes('--discord-root')
  ? args[args.indexOf('--discord-root') + 1]
  : path.join(process.cwd(), 'node_modules', 'discord.js');
const out = args.includes('--out') ? args[args.indexOf('--out') + 1] : path.join(process.cwd(), 'patches');

if (!discordRoot || !out) {
  console.error('Usage: node scripts/generate-patches.mjs [--discord-root <path>] [--out <path>]');
  process.exit(1);
}

const manifest = {
  generatedAt: new Date().toISOString(),
  discordRoot,
  patches: [
    {
      id: 'runtime-loader-hook',
      description: 'Placeholder patch for injected runtime websocket/fetch adapters.',
      target: 'packages/ws/src/ws/WebSocketShard.ts',
      strategy: 'future-overlay'
    },
    {
      id: 'rest-transport-bridge',
      description: 'Placeholder patch for undici/Bare transport bridge if needed.',
      target: 'packages/rest/src/index.ts',
      strategy: 'future-overlay'
    }
  ]
};

await fs.mkdir(out, { recursive: true });
await fs.writeFile(path.join(out, 'patch-manifest.json'), JSON.stringify(manifest, null, 2));
console.log('Generated patch manifest at', path.join(out, 'patch-manifest.json'));