import { NextRequest, NextResponse } from 'next/server'
import { getLibraries, addLibrary } from '@/lib/libraries'
import { getLibrariesForUser } from '@/lib/users'
import { requireAuth, requireAdmin } from '@/lib/auth'
import type { LibraryType } from '@/types'

export async function GET(request: NextRequest) {
  const auth = await requireAuth(request)
  if (auth instanceof NextResponse) return auth
  const { session } = auth

  try {
    const libraries =
      session.role === 'admin'
        ? getLibraries().map((l) => ({ ...l, accessLevel: 'admin' }))
        : getLibrariesForUser(session.userId, session.role)
    return NextResponse.json(libraries)
  } catch (err) {
    console.error('Failed to read libraries', err)
    return NextResponse.json({ error: 'Failed to load libraries' }, { status: 500 })
  }
}

export async function POST(request: NextRequest) {
  const auth = await requireAdmin(request)
  if (auth instanceof NextResponse) return auth

  let body: { name?: string; path?: string; type?: string }
  try {
    body = await request.json()
  } catch {
    return NextResponse.json({ error: 'Invalid JSON body' }, { status: 400 })
  }

  const { name, path, type } = body

  if (!name || !path || !type) {
    return NextResponse.json({ error: 'name, path, and type are required' }, { status: 400 })
  }

  const validTypes: LibraryType[] = ['comics', 'games', 'mixed', 'movies', 'tv']
  if (!validTypes.includes(type as LibraryType)) {
    return NextResponse.json({ error: `type must be one of: ${validTypes.join(', ')}` }, { status: 400 })
  }

  try {
    const library = addLibrary(name, path, type as LibraryType)
    return NextResponse.json(library, { status: 201 })
  } catch (err) {
    const message = err instanceof Error ? err.message : 'Failed to add library'
    return NextResponse.json({ error: message }, { status: 400 })
  }
}