// GET /api/clinics/by-domain?domain=helios-gesundheit.de   (or ?email=a.b@helios-gesundheit.de)
//
// Hospital groups share ONE registrable domain across many Standorte
// (helios-gesundheit.de: 78, asklepios.com: 45, sana.de: 41 …), so a domain can never
// identify a single hospital. This route returns the whole set and lets the user pick
// their own Standort.
export default defineEventHandler((event) => {
  const query = getQuery(event)
  const input = String(query.domain ?? '').trim() || String(query.email ?? '').trim()
  const domain = input.includes('@') ? domainFromEmail(input) : registrableDomain(input)

  if (!domain) return { status: 200, domain: '', freemail: false, count: 0, results: [] }
  if (isFreemailDomain(domain)) {
    return { status: 200, domain, freemail: true, count: 0, results: [] }
  }

  const results = clinicsByDomain(domain).map((c) => publicClinic(c))
  return { status: 200, domain, freemail: false, count: results.length, results }
})