import fs from "node:fs";

import os from "node:os";

import path from "node:path";

import { beforeAll, beforeEach, describe, expect, it, vi } from "vitest";

import { afterAll, beforeAll, beforeEach, describe, expect, it, vi } from "vitest";

import { createPerSenderSessionConfig } from "./test-helpers/session-config.js";

const callGatewayMock = vi.fn();

let addSubagentRunForTests: typeof import("./subagent-registry.js").addSubagentRunForTests;

let resetSubagentRegistryForTests: typeof import("./subagent-registry.js").resetSubagentRegistryForTests;

let subagentRegistryTesting: typeof import("./subagent-registry.js").__testing;

let setSubagentSpawnDepsForTest: typeof import("./subagent-spawn.js").__testing.setDepsForTest;

let createSessionsSpawnTool: typeof import("./tools/sessions-spawn-tool.js").createSessionsSpawnTool;

vi.mock("../config/config.js", async () => {

addSubagentRunForTests,

resetSubagentRegistryForTests,

} = await import("./subagent-registry.js"));

({

__testing: { setDepsForTest: setSubagentSpawnDepsForTest },

} = await import("./subagent-spawn.js"));

({ createSessionsSpawnTool } = await import("./tools/sessions-spawn-tool.js"));

});

describe("sessions_spawn depth + child limits", () => {

beforeEach(() => {

setSubagentSpawnDepsForTest({

callGateway: (opts) => callGatewayMock(opts),

getGlobalHookRunner: () => null,

});

subagentRegistryTesting.setDepsForTest({

captureSubagentCompletionReply: () => Promise.resolve(undefined),

cleanupBrowserSessionsForLifecycleEnd: () => Promise.resolve(),

});

});

afterAll(() => {

setSubagentSpawnDepsForTest();

});

it("rejects spawning when caller depth reaches maxSpawnDepth", async () => {

const tool = createSessionsSpawnTool({

agentSessionKey: "agent:main:subagent:parent",