// Demo-grade host bootstrap. Real auth would replace this entirely; for now
// we upsert by email and stash the host id in localStorage.
interface User {
  id: string
  email: string
  name: string
}

const STORAGE_KEY = 'gg.host'

export function useHost() {
  const host = useState<User | null>('gg-host', () => null)

  if (import.meta.client && !host.value) {
    const raw = window.localStorage.getItem(STORAGE_KEY)
    if (raw) {
      try {
        host.value = JSON.parse(raw)
      } catch {
        window.localStorage.removeItem(STORAGE_KEY)
      }
    }
  }

  async function bootstrap(email: string, name: string) {
    const u = await useApi<User>('/users', {
      method: 'POST',
      body: { email, name },
    })
    host.value = u
    if (import.meta.client) {
      window.localStorage.setItem(STORAGE_KEY, JSON.stringify(u))
    }
    return u
  }

  function clear() {
    host.value = null
    if (import.meta.client) window.localStorage.removeItem(STORAGE_KEY)
  }

  return { host, bootstrap, clear }
}