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

// Listen for search requests from main thread
self.onmessage = (event) => {
  const { lines, searchTerm, id } = event.data;

  if (!searchTerm || !lines) {
    self.postMessage({ type: 'complete', id, results: [] });
    return;
  }

  try {
    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) {
        self.postMessage({
          type: 'progress',
          id,
          percent: ((i + 1) / lines.length) * 100,
          foundSoFar: results.length
        });
      }
    }

    // Send final results
    self.postMessage({
      type: 'complete',
      id,
      results,
      totalMatches: results.length
    });
  } catch (error) {
    self.postMessage({
      type: 'error',
      id,
      error: error.message
    });
  }
};