import { NextRequest, NextResponse } from 'next/server'
import { getLibrary, resolveLibraryRoot } from '@/lib/libraries'
import { scanDirectory } from '@/lib/files'
import { requireLibraryAccess } from '@/lib/auth'

export async function GET(request: NextRequest) {
  const { searchParams } = request.nextUrl
  const libraryId = searchParams.get('libraryId')
  const subpath = searchParams.get('path') ?? ''

  if (!libraryId) {
    return NextResponse.json({ error: 'Missing libraryId' }, { status: 400 })
  }

  const auth = await requireLibraryAccess(request, libraryId)
  if (auth instanceof NextResponse) return auth

  const library = getLibrary(libraryId)
  if (!library) {
    return NextResponse.json({ error: 'Library not found' }, { status: 404 })
  }
  if (library.type !== 'mixed') {
    return NextResponse.json({ error: 'Library is not a mixed library' }, { status: 400 })
  }

  const root = resolveLibraryRoot(library)
  const listing = scanDirectory(root, libraryId, subpath)
  return NextResponse.json(listing)
}