// ---------------------------------------------------------------------------
// settings / platformAdminApi.ts — the Loopable admin plane's client half
// (wave 19, owner item 13 / R3+R4, contract C2).
//
// ⛔ THE CLIENT HIDES; THE SERVER FORBIDS. Every route here is walled by
// `core.platform_admin.is_platform_admin` — a double lock (the record flag AND
// the `loopable` tenant), fail-closed, proven by `verify_api.py` enumerating the
// router and having a tenant admin try every path. The `platformAdmin` flag on
// `GET /settings` exists so the rail does not paint a door that would 403; it is
// never the permission ([[aios-permissioning]]).
//
// SELF-CONTAINED BY CONTRACT (C2). This module and `AdminPane.tsx` are the only
// two files the admin plane owns on the client, and they import nothing from the
// rest of `settings/` — the pane fetches its own data, so mounting it is one line
// in the rail and one line in the pane switch.
//
// ⚠ NULL IS A REAL VALUE HERE, AND IT IS NOT ZERO. Any per-tenant count can come
// back `null`, meaning "that subsystem could not be read for this customer" — a
// suspended tenant record, a locked keychain, an HF repo that did not answer.
// Rendering it as 0 would tell an operator a customer has no databases when the
// truth is that we did not look. The types say `number | null` for exactly that
// reason and the pane renders the difference.
// ---------------------------------------------------------------------------

import { API_V1, CREDENTIALS } from "../apiContract";

export type ApiResult<T> = { ok: true; data: T } | { ok: false; status: number; message: string };

async function call<T>(path: string): Promise<ApiResult<T>> {
  try {
    const res = await fetch(`${API_V1}/platform-admin${path}`, { credentials: CREDENTIALS });
    let body: unknown = null;
    try {
      body = await res.json();
    } catch {
      /* an unreadable body is handled below, never thrown at the pane */
    }
    if (!res.ok) {
      const err = (body as { error?: { message?: string } } | null)?.error;
      const message =
        res.status >= 500
          ? "Something went wrong on our side. Try again in a moment."
          : err?.message ||
            (res.status === 403
              ? "This surface is not available to your account."
              : "That could not be loaded.");
      return { ok: false, status: res.status, message };
    }
    return { ok: true, data: body as T };
  } catch {
    return { ok: false, status: 0, message: "The server could not be reached." };
  }
}

/** One customer. `error` / `errors` carry the honest reason a count is null. */
export interface TenantRow {
  slug: string;
  name: string;
  /** `record` = provisioned into the control-plane bucket; `compiled` = tenant #0. */
  source: string;
  status: string;
  domains: string[];
  modules: string[] | "all";
  /** R2: a dedicated dataset repo, or the shared repo. The isolation shape. */
  storeRepo: string;
  storePrefix: string;
  error: string;
  users: number;
  admins: number;
  databases: number | null;
  rows: number | null;
  connectors: number | null;
  connectorsPaused?: number | null;
  automations: number | null;
  automationsEnabled?: number | null;
  keychainLocked?: boolean | null;
  errors?: string[];
}

export interface Overview {
  tenants: TenantRow[];
  totals: {
    tenants: number;
    users: number;
    orphanUsers: number;
    databases: number;
    rows: number;
    automations: number;
    unknownTenants: number;
  };
  storeAvailable: boolean;
  generatedAt: string;
  tookMs: number;
}

export interface PlatformUser {
  username: string;
  name: string;
  email: string;
  tenant: string;
  role: string;
  active: boolean;
  /** R4 — absent means never, and the pane says "never" rather than inventing a date. */
  lastLogin: string;
  lastActive: string;
  platformAdmin: boolean;
}

export interface DatabaseRow {
  tenant: string;
  key: string;
  label: string;
  source: string;
  createdBy: string;
  created: string;
  fields: number;
  rowCount: number;
}

export interface ConnectorRow {
  tenant: string;
  key: string;
  label: string;
  type: string;
  source: string;
  active: boolean;
  paused: boolean;
}

export interface AutomationRow {
  tenant: string;
  id: string;
  name: string;
  kind: string;
  enabled: boolean;
  cron: string;
  /** null = a cadence the server would not parse; shown as "custom", never as a number. */
  runsPerDay: number | null;
  state: string;
  lastRunAt: string;
  lastSummary: string;
  runsRetained: number;
  failedRetained: number;
  createdBy: string;
  created: string;
}

export interface FleetCost {
  cadence: string;
  invocationsPerMonth: number;
  freeRequestsPct: number;
  freeSchedulerPct: number;
  lambdaMb: number;
  usd: number;
  fleetRunsPerDay: number;
  unknownCadence: number;
  basis: string;
}

export interface AwsReport {
  available: boolean;
  text: string;
  note: string;
}

export function getOverview(): Promise<ApiResult<Overview>> {
  return call<Overview>("/overview");
}

/** `tenant` narrows every drill; omitted, they answer for the whole platform. */
const q = (tenant?: string) => (tenant ? `?tenant=${encodeURIComponent(tenant)}` : "");

export function getUsers(
  tenant?: string
): Promise<ApiResult<{ users: PlatformUser[]; count: number; stampsNote: string }>> {
  return call(`/users${q(tenant)}`);
}

export function getDatabases(
  tenant?: string
): Promise<
  ApiResult<{
    databases: DatabaseRow[];
    count: number;
    rows: number;
    errors: Record<string, string>;
  }>
> {
  return call(`/databases${q(tenant)}`);
}

export function getConnectors(
  tenant?: string
): Promise<
  ApiResult<{
    connectors: ConnectorRow[];
    count: number;
    keychainLocked: Record<string, boolean>;
    errors: Record<string, string>;
    note: string;
  }>
> {
  return call(`/connectors${q(tenant)}`);
}

export function getAutomations(
  tenant?: string
): Promise<
  ApiResult<{
    automations: AutomationRow[];
    count: number;
    enabled: number;
    historyRetained: number;
    cost: FleetCost;
    errors: Record<string, string>;
    tickEnabled: boolean;
  }>
> {
  return call(`/automations${q(tenant)}`);
}

export function getAws(days = 7): Promise<ApiResult<{ days: number; report: AwsReport }>> {
  return call(`/aws?days=${encodeURIComponent(String(days))}`);
}

// ── Wave 20 (owner item 12 / R6): RELEASES ──────────────────────────────────
// Read-only by ruling. The operator SEES what is running where and what could be
// gone back to; promoting stays `deploy_web.py --promote=vN`, so no web session
// can move production. `promote` carries that command in the payload because the
// person reading this panel is exactly the person who needs it.

/** One environment. `version` is what the SPACE says about itself (its own
 *  `VERSION` file) — never inferred from a timestamp, because `last_modified`
 *  moves when a SECRET is pushed and would report a deploy that never happened. */
export interface ReleaseEnv {
  env: string;
  space: string;
  /** null + a `note` = we could not read it. NOT "nothing is deployed". */
  version: string | null;
  note: string | null;
  /** HF runtime stage (`RUNNING`, `BUILDING`, …), or null when unreadable. */
  stage: string | null;
}

export interface ReleaseTag {
  version: string;
  sha: string;
  date: string;
  subject: string;
}

export interface ReleasesPayload {
  /** The version THIS container is running (`AIOS_VERSION`), for the "you are here" case. */
  here: string;
  environments: ReleaseEnv[];
  releases: ReleaseTag[];
  /** The CLI that moves a version. In the payload because the panel is read-only by ruling. */
  promote: string;
}

export function getReleases(): Promise<ApiResult<ReleasesPayload>> {
  return call("/releases");
}