import { createBrowserClient } from '@supabase/ssr'

// During Docker builds, NEXT_PUBLIC_* vars are placeholder sentinels
// (e.g. __NEXT_PUBLIC_SUPABASE_URL__) that get replaced at runtime by
// docker-entrypoint.sh. Provide a dummy URL so the client constructor
// doesn't throw during Next.js static page generation.
const url = process.env.NEXT_PUBLIC_SUPABASE_URL ?? ''
const key = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY ?? ''
const isBuildPlaceholder = !url || url.startsWith('__')

// Cookie encoding must match lib/supabase/server.ts (default
// `user-and-tokens`); see the note there before switching to `tokens-only`.
export function createClient() {
  return createBrowserClient(
    isBuildPlaceholder ? 'https://placeholder.supabase.co' : url,
    isBuildPlaceholder ? 'placeholder' : key
  )
}