/**
 * Browser-native media formats safe for use in <video> and <img> elements.
 * Kept separate from the broader scanner extension sets (media-utils.ts, files.ts)
 * which include server-side-only formats like .mkv, .avi, .tiff, etc.
 */

export const BROWSER_VIDEO_EXTENSIONS = new Set(['.mp4', '.webm', '.mov', '.m4v'])
export const BROWSER_IMAGE_EXTENSIONS = new Set(['.jpg', '.jpeg', '.png', '.gif', '.webp', '.bmp'])

/**
 * Returns true if the file at `filename` (or path) has a browser-playable extension.
 * Uses lastIndexOf to avoid importing the Node `path` module in client components.
 */
export function isBrowserPlayable(filename: string): boolean {
  const dot = filename.lastIndexOf('.')
  if (dot === -1) return false
  const ext = filename.slice(dot).toLowerCase()
  return BROWSER_VIDEO_EXTENSIONS.has(ext) || BROWSER_IMAGE_EXTENSIONS.has(ext)
}