// Client for the arcadia-search admin sidecar (`/admin/*` on the
// search box, default :7801). Used by the Search route to manage
// tenants, corpora, and trigger rebuilds.
//
// Auth: static bearer token from VITE_ARCADIA_SEARCH_ADMIN_TOKEN,
// matched constant-time against ADMIN_TOKEN on the sidecar. The token
// ships in the client bundle — fine for an internal admin tool on a
// trusted network; in production, proxy through arcadia-core.

const BASE_URL =
  import.meta.env.VITE_ARCADIA_SEARCH_ADMIN_URL ?? "http://127.0.0.1:7801"
const TOKEN = import.meta.env.VITE_ARCADIA_SEARCH_ADMIN_TOKEN ?? ""

export class SearchAdminError extends Error {
  status: number
  constructor(message: string, status: number) {
    super(message)
    this.name = "SearchAdminError"
    this.status = status
  }
}

async function call<T>(
  method: "GET" | "POST" | "PUT" | "DELETE",
  path: string,
  body?: unknown,
): Promise<T> {
  const headers: Record<string, string> = {}
  if (TOKEN) headers["Authorization"] = `Bearer ${TOKEN}`
  if (body !== undefined) headers["Content-Type"] = "application/json"
  const res = await fetch(`${BASE_URL}${path}`, {
    method,
    headers,
    body: body === undefined ? undefined : JSON.stringify(body),
  })
  if (!res.ok) {
    const text = await res.text().catch(() => "")
    throw new SearchAdminError(
      text || `${res.status} ${res.statusText}`,
      res.status,
    )
  }
  if (res.status === 204) return undefined as T
  return (await res.json()) as T
}

export type TenantSummary = { id: string; corpus_count: number }
export type CorpusSummary = {
  tenant: string
  corpus: string
  indexed: boolean
  num_docs: number | null
  live_path: string | null
}
export type CorpusDetail = {
  config: Record<string, unknown>
  status: CorpusSummary
}
export type RebuildResult = {
  tenant: string
  corpus: string
  chunk_count: number
  live_path: string
  built_at: string
}

export const searchAdmin = {
  baseUrl: BASE_URL,
  hasToken: !!TOKEN,
  listTenants: () =>
    call<{ tenants: TenantSummary[] }>("GET", "/admin/tenants"),
  createTenant: (id: string) =>
    call<TenantSummary>("POST", "/admin/tenants", { id }),
  deleteTenant: (id: string) =>
    call<void>("DELETE", `/admin/tenants/${encodeURIComponent(id)}`),
  listCorpora: (tenant: string) =>
    call<{ corpora: CorpusSummary[] }>(
      "GET",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora`,
    ),
  createCorpus: (tenant: string, body: Record<string, unknown>) =>
    call<CorpusSummary>(
      "POST",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora`,
      body,
    ),
  getCorpus: (tenant: string, corpus: string) =>
    call<CorpusDetail>(
      "GET",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora/${encodeURIComponent(corpus)}`,
    ),
  updateCorpus: (
    tenant: string,
    corpus: string,
    body: Record<string, unknown>,
  ) =>
    call<CorpusSummary>(
      "PUT",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora/${encodeURIComponent(corpus)}`,
      body,
    ),
  deleteCorpus: (tenant: string, corpus: string) =>
    call<void>(
      "DELETE",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora/${encodeURIComponent(corpus)}`,
    ),
  rebuild: (tenant: string, corpus: string) =>
    call<RebuildResult>(
      "POST",
      `/admin/tenants/${encodeURIComponent(tenant)}/corpora/${encodeURIComponent(corpus)}/rebuild`,
    ),
  restart: () => call<void>("POST", "/admin/restart"),
}