/**
 * Search Worker
 * Offloads search operations to a background thread to avoid blocking the UI
 */

console.log('🔧 Search worker initialized');

// Listen for search requests from main thread
self.onmessage = event => {
  const { lines, searchTerm, id } = event.data;
  console.log('📨 Worker received message:', {
    linesCount: lines?.length,
    searchTerm,
    id
  });

  if (!searchTerm || !lines) {
    console.warn('⚠️ Invalid search data received');
    self.postMessage({ type: 'complete', id, results: [] });
    return;
  }

  try {
    console.log('🔍 Starting search for:', searchTerm);
    const results = [];
    const lowerSearchTerm = searchTerm.toLowerCase();
    const chunkSize = 1000; // Process in chunks and send updates

    // Process lines and find matches
    for (let i = 0; i < lines.length; i++) {
      if (lines[i].toLowerCase().includes(lowerSearchTerm)) {
        results.push(i);
      }

      // Send progress updates every chunk
      if ((i + 1) % chunkSize === 0) {
        const percent = ((i + 1) / lines.length) * 100;
        console.log(
          `📊 Progress: ${Math.round(percent)}% (${results.length} matches found)`
        );
        self.postMessage({
          type: 'progress',
          id,
          percent,
          foundSoFar: results.length
        });
      }
    }

    // Send final results
    console.log(`✅ Search complete: Found ${results.length} matches`);
    self.postMessage({
      type: 'complete',
      id,
      results,
      totalMatches: results.length
    });
  } catch (error) {
    console.error('❌ Worker error during search:', error);
    self.postMessage({
      type: 'error',
      id,
      error: error.message
    });
  }
};