import { lunarisVersionSchema } from "@/lib/catalog/version";
import { discordWorkerHeartbeatKey, getRedisClient } from "@/lib/redis/client";

export async function checkSlip2Go(signal: AbortSignal): Promise<void> {
  const configuredUrl = process.env.SLIP2GO_VERIFY_URL;
  if (!configuredUrl || !process.env.SLIP2GO_API_SECRET) throw new Error("Slip2Go is not configured.");
  const url = new URL(configuredUrl);
  if (url.protocol !== "https:") throw new Error("Slip2Go URL must use HTTPS.");
  const response = await fetch(url, { method: "HEAD", cache: "no-store", signal });
  // The verification endpoint requires a real slip, so a rejected HEAD request can still prove reachability.
  if (!response.ok && ![400, 401, 403, 405, 415, 422].includes(response.status)) {
    throw new Error(`Slip2Go returned ${response.status}.`);
  }
}

export async function checkLunaris(signal: AbortSignal): Promise<void> {
  const response = await fetch("https://api.lunaris.moe/data/version.json", { cache: "no-store", signal });
  if (!response.ok) throw new Error(`Lunaris returned ${response.status}.`);
  const body: unknown = await response.json();
  if (typeof body !== "object" || body === null || !("version" in body)) {
    throw new Error("Invalid Lunaris version response.");
  }
  lunarisVersionSchema.parse(body.version);
}

export async function checkDiscordBot(): Promise<void> {
  const redis = await getRedisClient();
  if (!(await redis.exists(discordWorkerHeartbeatKey()))) {
    throw new Error("Discord worker heartbeat is missing.");
  }
}