import { redirect } from 'next/navigation'
import { canAccess, getAdminContext, PERMS } from '@/lib/permissions'
import { prisma } from '@/lib/prisma'
import { siteSettings } from '@/lib/services/site-settings'
import { DEFAULT_SOUNDTRACK_BASE_URL, parseTrackSamples } from '@/lib/services/soundtracks'
import { SoundsClient } from './sounds-client'

export default async function SoundsPage() {
  const { session, permissions } = await getAdminContext()

  if (!canAccess(permissions, PERMS.CATALOG_VIEW, session.user.rank)) {
    redirect('/admin')
  }

  const canEdit = canAccess(permissions, PERMS.CATALOG_EDIT, session.user.rank)

  const [rows, usage, baseUrlSetting] = await Promise.all([
    prisma.soundtracks.findMany({
      orderBy: { id: 'asc' },
      select: {
        id: true,
        code: true,
        name: true,
        author: true,
        length: true,
        track: true,
      },
    }),
    prisma.catalogItem.groupBy({
      by: ['songId'],
      where: { songId: { gt: 0 } },
      _count: { _all: true },
    }),
    siteSettings.get('soundtrack_base_url', DEFAULT_SOUNDTRACK_BASE_URL),
  ])

  const usageMap: Record<number, number> = {}
  for (const row of usage) {
    if (row.songId != null) usageMap[row.songId] = row._count._all
  }

  const soundtracks = rows.map((r) => {
    const samples = parseTrackSamples(r.track)
    return {
      id: r.id,
      code: r.code,
      name: r.name,
      author: r.author,
      length: r.length,
      track: r.track,
      samples,
      kind: (samples.length > 0 ? 'composition' : 'single') as 'composition' | 'single',
      usedBy: usageMap[r.id] ?? 0,
    }
  })

  // Normalize: ensure trailing slash so ${base}${code}.mp3 yields a valid URL.
  const baseUrl = baseUrlSetting.endsWith('/') ? baseUrlSetting : `${baseUrlSetting}/`

  return (
    <div className="space-y-6">
      <div>
        <h1 className="text-3xl font-bold tracking-tight">Song Disks</h1>
        <p className="text-muted-foreground">
          Carica e gestisci i file MP3 dei song disk riprodotti dai jukebox in-game. I file sono
          serviti da <code>{baseUrl}</code> (configurabile in{' '}
          <a href="/admin/settings/cms" className="underline">
            Impostazioni &gt; CMS
          </a>
          ).
        </p>
      </div>
      <SoundsClient soundtracks={soundtracks} canEdit={canEdit} baseUrl={baseUrl} />
    </div>
  )
}