// The run loop primes lifecycle.runtime.ts before the HTTP listener binds, so the
// hub's re-exports decide how much module graph loads during gateway cold start.
import { readFileSync } from "node:fs";
import path from "node:path";
import { describe, expect, it } from "vitest";

const repoRoot = path.resolve(import.meta.dirname, "../../..");

function readSource(relativePath: string): string {
  return readFileSync(path.join(repoRoot, relativePath), "utf8");
}

describe("gateway lifecycle hub import boundaries", () => {
  it("re-exports primed symbols from their defining modules instead of facades", () => {
    const hub = readSource("src/cli/gateway-cli/lifecycle.runtime.ts");

    // The generation owner must not pull hot-reload or managed-reloader graphs
    // into the lifecycle hub before the gateway can accept a connection.
    expect(hub).toContain('from "../../gateway/server-reload-generation.js"');
    expect(hub).not.toContain('from "../../gateway/server-reload-hot.js"');
    expect(hub).not.toContain('from "../../gateway/server-reload-managed.js"');

    // Restart marking belongs to server close, after the drain identifies the
    // exact runs that still need abort. The primed run-loop hub must not regain
    // the earlier duplicate owner.
    expect(hub).not.toContain("main-session-restart-recovery");
    expect(hub).not.toContain(
      'from "../../agents/main-session-recovery/main-session-restart-recovery.js"',
    );
  });

  it("still primes the hub eagerly so signal handlers survive dist chunk rotation", () => {
    const runLoop = readSource("src/cli/gateway-cli/run-loop.ts");
    const eagerPrime = runLoop.indexOf("await loadGatewayLifecycleRuntimeModule()");
    const signalInstall = runLoop.indexOf("process.on(");

    expect(eagerPrime).toBeGreaterThan(-1);
    expect(signalInstall).toBeGreaterThan(eagerPrime);
  });
});