import { createScopedLogger } from "./utils/logger.server";
import { subscribeSubscriptionCache } from "./utils/services/.server/subscriptionCache.server";
import { subscribeTenantCache } from "./utils/db/tenant-cache.server";
import { subscribeFeatureFlagCache } from "./utils/services/.server/featureFlagCache.server";
import { wireTenantPlanLookup } from "./utils/services/.server/tenantPlanLookup.server";

const log = createScopedLogger("cache-bootstrap");
let started = false;

function pubsubEnabled(): boolean {
  const raw = process.env.CACHE_INVALIDATION_ENABLED;
  if (raw === undefined || raw === null || raw === "") return true;
  return raw.toLowerCase() !== "false" && raw !== "0";
}

/**
 * Idempotent boot hook. Starts every cache-invalidation subscriber this
 * web replica needs to keep its in-process L1 caches consistent with the
 * SharedStore L2 (and with mutations originating in other apps such as
 * the Stripe webhook in apps/api).
 *
 * Safe to call multiple times — only the first invocation wires the
 * subscribers; subsequent calls are no-ops. Failures are logged but
 * intentionally swallowed: the L1 cache TTL is the safety net.
 */
export function startCacheSubscribers(): void {
  if (started) return;
  started = true;
  // Wire the BullMQ tenant-plan lookup unconditionally — it reads from the
  // subscription cache which still serves locally when pub/sub is off.
  wireTenantPlanLookup();
  if (!pubsubEnabled()) {
    log.warn(
      { component: "cache-bootstrap" },
      "CACHE_INVALIDATION_ENABLED=false — pub/sub subscribers will not start (L1 TTL is the only consistency mechanism)",
    );
    return;
  }
  void Promise.all([
    subscribeSubscriptionCache().catch((err: unknown) => {
      log.error({ err }, "subscription cache subscriber failed to start");
    }),
    subscribeTenantCache().catch((err: unknown) => {
      log.error({ err }, "tenant cache subscriber failed to start");
    }),
    subscribeFeatureFlagCache().catch((err: unknown) => {
      log.error({ err }, "feature-flag cache subscriber failed to start");
    }),
  ]).then(() => {
    log.info({ component: "cache-bootstrap" }, "cache subscribers started");
  });
}

/** Test seam: reset the started flag. */
export function __resetCacheBootstrapForTests(): void {
  started = false;
}