import { readdirSync, existsSync, mkdirSync, cpSync } from 'node:fs';
import { join } from 'node:path';
import { SEED_PATH, DATA_PATH } from './data-path';

const SEED_EXTENSIONS_DIR = join(SEED_PATH, 'extensions');
const GLOBAL_EXTENSIONS_DIR = join(DATA_PATH, 'extensions');

export function syncSeedExtensions(): void {
  if (!existsSync(SEED_EXTENSIONS_DIR)) return;

  mkdirSync(GLOBAL_EXTENSIONS_DIR, { recursive: true });

  const seedEntries = readdirSync(SEED_EXTENSIONS_DIR, { withFileTypes: true });

  for (const entry of seedEntries) {
    if (!entry.isDirectory()) continue;

    const seedExtensionDir = join(SEED_EXTENSIONS_DIR, entry.name);
    const entryFile = join(seedExtensionDir, 'index.ts');
    if (!existsSync(entryFile)) continue;

    const targetDir = join(GLOBAL_EXTENSIONS_DIR, entry.name);

    if (existsSync(targetDir)) {
      // Extension already exists in DATA_PATH — always overwrite (managed by us, not the user)
      cpSync(seedExtensionDir, targetDir, { recursive: true });
      continue;
    }

    cpSync(seedExtensionDir, targetDir, { recursive: true });
    console.log(`[extensions] Synced seed extension: ${entry.name}`);
  }
}