import { desc, eq } from 'drizzle-orm'
import { uploads, users } from '../../../db/schema'

// Upload-Liste eines Nutzers mit Viewport-Pagination (wie /api/uploads).
// thumbUrl wird hier serverseitig mitgeliefert — kein separater Meta-Call.
export default defineEventHandler(async (event) => {
  const idParam = getRouterParam(event, 'id') ?? ''
  if (!/^\d+$/.test(idParam)) {
    throw createError({ statusCode: 400, statusMessage: 'Ungültige Nutzer-ID' })
  }
  const userId = Number(idParam)

  const q = getQuery(event)
  const { page, cells, cols, uniform } = getGridPageParams(q)

  const db = useDb()
  const rows = await db
    .select({
      id: uploads.id,
      type: uploads.type,
      fileName: uploads.fileName,
      externalUrl: uploads.externalUrl,
      previewImage: uploads.previewImage,
      commentCount: uploads.commentCount,
      createdAt: uploads.createdAt,
      userName: users.name,
      userColor: users.color,
      userAvatar: users.avatar,
    })
    .from(uploads)
    .innerJoin(users, eq(uploads.userId, users.id))
    .where(eq(uploads.userId, userId))
    .orderBy(desc(uploads.createdAt))

  const pages = paginateGrid(rows, r => gridTileDims(r.commentCount, uniform, cols), cells, cols)

  const items = (pages[page - 1] ?? []).map((row) => {
    const url = row.externalUrl ?? `/uploads/${row.fileName}`
    const embedId = row.type === 'youtube' && row.externalUrl ? getYoutubeId(row.externalUrl) : null
    const thumbUrl = row.previewImage
      ?? (row.type === 'youtube' && embedId ? youtubeThumbUrl(embedId) : row.type === 'image' ? url : null)
    return { ...row, url, thumbUrl, userAvatarUrl: avatarUrl(row.userAvatar) }
  })

  return { items, total: rows.length, pageCount: pages.length }
})