import fs from 'fs';
import path from 'path';
import crypto from 'crypto';
import { fileURLToPath } from 'url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));

const generateProjectHash = () => {
  const hash = crypto.createHash('sha256');
  const walk = (dir) => {
    const files = fs.readdirSync(dir);
    files.forEach(file => {
      const filePath = path.join(dir, file);
      const stat = fs.statSync(filePath);
      if (stat.isDirectory()) {
        walk(filePath);
      } else {
        hash.update(fs.readFileSync(filePath));
      }
    });
  };

  walk(path.join(__dirname, '..'));
  return hash.digest('hex').substring(0, 7); // 使用前10个字符作为短哈希
};

const generateBuildId = () => {
  const projectHash = generateProjectHash();
  const envFilePath = path.join(__dirname, '..', '.env.local');
  
  if (fs.existsSync(envFilePath)) {
    fs.unlinkSync(envFilePath);
  }
  
  fs.writeFileSync(envFilePath, `NEXT_PUBLIC_BUILD_ID=${projectHash}`);
  console.log(`Build ID generated: ${projectHash}`);
};

generateBuildId();