#!/usr/bin/env node

/**
 * Inject build timestamp into service worker
 * This script replaces __BUILD_TIMESTAMP__ with the current timestamp
 * to force cache invalidation on new deployments
 */

import fs from 'fs';
import path from 'path';
import { execFileSync } from 'child_process';
import { fileURLToPath } from 'url';

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

const SW_SOURCE = path.join(__dirname, '..', 'public', 'sw.js');

try {
  // Read the service worker file
  let swContent = fs.readFileSync(SW_SOURCE, 'utf8');

  // Check if placeholder exists
  if (!swContent.includes('__BUILD_TIMESTAMP__')) {
    console.log('⚠️  Service worker appears to be already processed');
    process.exit(0);
  }

  // Generate version (use git commit hash if available, otherwise use timestamp)
  let version;

  try {
    // Try to get git commit hash using safe execFileSync
    version = execFileSync('git', ['rev-parse', '--short', 'HEAD'], {
      encoding: 'utf8',
      stdio: ['pipe', 'pipe', 'ignore']
    }).trim();
    console.log(`📦 Using git commit hash: ${version}`);
  } catch (error) {
    // Fallback to timestamp
    version = Date.now().toString();
    console.log(`📦 Using timestamp: ${version}`);
  }

  // Replace the placeholder with the version
  swContent = swContent.replace(/__BUILD_TIMESTAMP__/g, version);

  // Write the updated service worker
  fs.writeFileSync(SW_SOURCE, swContent);

  console.log(`✅ Service worker version injected: ${version}`);
  console.log(`📝 Updated: ${SW_SOURCE}`);
} catch (error) {
  console.error('❌ Error injecting service worker version:', error);
  process.exit(1);
}