import * as Effect from "effect/Effect";

// Start the import at module evaluation (legal since workerd's 2025-03
// importable-env change) so the isolate-lifetime layer build that awaits it
// only ever sees an already-settled promise. This keeps the first event's
// build free of I/O-backed awaits: everything after this is pure layer
// assembly plus scheduler microtasks. Outside workerd (deploy/plan in Node,
// vitest) the import rejects and the fallback stub is used; the `.catch` is
// attached immediately so the rejection is always handled.
const modulePromise: Promise<typeof import("cloudflare:workers")> =
  import("cloudflare:workers").catch(
    () =>
      ({
        env: {},
        DurableObject: class {},
        WorkflowEntrypoint: class {
          async run() {}
        },
      }) as any,
  );

const cloudflare_workers: Effect.Effect<typeof import("cloudflare:workers")> =
  Effect.promise(() => modulePromise);

export default cloudflare_workers;