/**
 * MIME type detection based on file extension
 */

const MIME_TYPES: Record<string, string> = {
  // Text
  '.html': 'text/html; charset=utf-8',
  '.htm': 'text/html; charset=utf-8',
  '.css': 'text/css; charset=utf-8',
  '.js': 'text/javascript; charset=utf-8',
  '.mjs': 'text/javascript; charset=utf-8',
  '.json': 'application/json; charset=utf-8',
  '.xml': 'application/xml; charset=utf-8',
  '.txt': 'text/plain; charset=utf-8',
  '.md': 'text/markdown; charset=utf-8',
  '.csv': 'text/csv; charset=utf-8',
  '.yaml': 'text/yaml; charset=utf-8',
  '.yml': 'text/yaml; charset=utf-8',

  // Images
  '.png': 'image/png',
  '.jpg': 'image/jpeg',
  '.jpeg': 'image/jpeg',
  '.gif': 'image/gif',
  '.webp': 'image/webp',
  '.svg': 'image/svg+xml',
  '.ico': 'image/x-icon',
  '.bmp': 'image/bmp',
  '.avif': 'image/avif',

  // Fonts
  '.woff': 'font/woff',
  '.woff2': 'font/woff2',
  '.ttf': 'font/ttf',
  '.otf': 'font/otf',
  '.eot': 'application/vnd.ms-fontobject',

  // Audio
  '.mp3': 'audio/mpeg',
  '.wav': 'audio/wav',
  '.ogg': 'audio/ogg',
  '.m4a': 'audio/mp4',
  '.flac': 'audio/flac',
  '.aac': 'audio/aac',

  // Video
  '.mp4': 'video/mp4',
  '.webm': 'video/webm',
  '.ogv': 'video/ogg',
  '.avi': 'video/x-msvideo',
  '.mov': 'video/quicktime',
  '.mkv': 'video/x-matroska',

  // Documents
  '.pdf': 'application/pdf',
  '.doc': 'application/msword',
  '.docx': 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
  '.xls': 'application/vnd.ms-excel',
  '.xlsx': 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
  '.ppt': 'application/vnd.ms-powerpoint',
  '.pptx': 'application/vnd.openxmlformats-officedocument.presentationml.presentation',

  // Archives
  '.zip': 'application/zip',
  '.tar': 'application/x-tar',
  '.gz': 'application/gzip',
  '.rar': 'application/vnd.rar',
  '.7z': 'application/x-7z-compressed',

  // Source maps
  '.map': 'application/json',

  // TypeScript
  '.ts': 'text/typescript; charset=utf-8',
  '.tsx': 'text/typescript; charset=utf-8',
  '.d.ts': 'text/typescript; charset=utf-8',

  // WebAssembly
  '.wasm': 'application/wasm',

  // Manifest
  '.webmanifest': 'application/manifest+json',
};

/**
 * Get MIME type for a file path
 */
export function getMimeType(filePath: string): string {
  const ext = filePath.toLowerCase().match(/\.[^.]+$/)?.[0] ?? '';
  return MIME_TYPES[ext] ?? 'application/octet-stream';
}

/**
 * Check if MIME type is text-based
 */
export function isTextMimeType(mimeType: string): boolean {
  return mimeType.startsWith('text/') ||
    mimeType.includes('json') ||
    mimeType.includes('xml') ||
    mimeType.includes('javascript');
}