export default defineEventHandler(async (event) => {
  const query = getQuery(event)
  const filename = String(query.filename || '')
  if (!filename) {
    throw createError({ statusCode: 400, statusMessage: 'filename is required' })
  }
  const subfolder = String(query.subfolder || 'video')
  const type = String(query.type || 'output')
  const params = new URLSearchParams({ filename, subfolder, type })
  const res = await comfyFetch(`/view?${params.toString()}`)
  if (!res.ok) {
    throw createError({ statusCode: res.status, statusMessage: 'Failed to fetch video from ComfyUI' })
  }
  const buf = Buffer.from(await res.arrayBuffer())
  setHeader(event, 'Content-Type', res.headers.get('content-type') || 'video/mp4')
  setHeader(event, 'Content-Disposition', `inline; filename="${filename}"`)
  setHeader(event, 'Cache-Control', 'private, max-age=3600')
  return buf
})