import { existsSync, readFileSync } from 'node:fs'

export default defineEventHandler((event) => {
  assertLibraryAccess(event)
  const id = String(getRouterParam(event, 'id') || '')
  const clip = getClip(id)
  if (clip.hideThumbnail) {
    throw createError({ statusCode: 404, statusMessage: 'Thumbnail hidden' })
  }
  const path = clipThumbPath(clip.id)
  if (!existsSync(path)) {
    throw createError({ statusCode: 404, statusMessage: 'Thumbnail not found' })
  }
  const buf = readFileSync(path)
  const png = buf[0] === 0x89 && buf[1] === 0x50
  setHeader(event, 'Content-Type', png ? 'image/png' : 'image/jpeg')
  setHeader(event, 'Cache-Control', 'private, max-age=3600')
  return buf
})