// Hand-written mirror of arr-api's /api/health schema. `just gen-client`
// output (src/api/) is uncommitted, so CI's tsc cannot see it — this one
// endpoint stays hand-typed until the generated client is wired in.

export type CheckStatus = "ok" | "unreachable" | "unconfigured";

export interface Check {
  status: CheckStatus;
  detail?: string;
}

export interface HealthReport {
  status: "ok" | "degraded";
  version: string;
  prowlarr: Check;
  transmission: Check;
  tmdb: Check;
}

export type Probe =
  | { kind: "report"; report: HealthReport; roundtripMs: number }
  | { kind: "unreachable"; detail: string };

/** One probe of the daemon. The endpoint always answers 200 with a verdict in
 * the body; anything else means the daemon itself is the outage. */
export async function probeHealth(): Promise<Probe> {
  const started = performance.now();
  try {
    const response = await fetch("/api/health");
    if (!response.ok) {
      return { kind: "unreachable", detail: `http ${response.status}` };
    }
    const report = (await response.json()) as HealthReport;
    return {
      kind: "report",
      report,
      roundtripMs: Math.round(performance.now() - started),
    };
  } catch {
    return { kind: "unreachable", detail: "no response" };
  }
}