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import { describe, expect, it, vi } from "vitest";
import { withPluginRuntimeGatewayRequestScope } from "../../../plugins/runtime/gateway-request-scope.js";
import {
  cleanupProvisionalSession,
  terminateAcceptedCollectorRun,
} from "./subagent-spawn-cleanup.js";

function sessionChangedError(): Error {
  return Object.assign(new Error("session changed"), {
    name: "GatewayClientRequestError",
    gatewayCode: "INVALID_REQUEST",
    details: { reason: "session-changed" },
  });
}

describe("subagent spawn cleanup identity", () => {
  it("requires both frozen session identities before deletion", async () => {
    const callGateway = vi.fn();

    await expect(
      cleanupProvisionalSession("agent:main:subagent:child", {
        expectedSessionId: "session-id",
        callGateway,
      }),
    ).resolves.toBe(false);

    expect(callGateway).not.toHaveBeenCalled();
  });

  it("accepts chat.abort only when it confirms the exact run", async () => {
    const callGateway = vi
      .fn()
      .mockResolvedValueOnce({ ok: true, aborted: false, runIds: [] })
      .mockResolvedValueOnce({ deleted: true });

    await terminateAcceptedCollectorRun({
      childSessionKey: "agent:main:subagent:child",
      gatewayRunId: "gateway-run",
      expectedSessionId: "session-id",
      expectedLifecycleRevision: "session-revision",
      callGateway,
    });

    expect(callGateway).toHaveBeenNthCalledWith(2, {
      method: "sessions.delete",
      params: {
        key: "agent:main:subagent:child",
        emitLifecycleHooks: false,
        deleteTranscript: true,
        expectedSessionId: "session-id",
        expectedLifecycleRevision: "session-revision",
      },
      timeoutMs: 60_000,
    });
  });

  it("does not delete after chat.abort confirms the matching run", async () => {
    const callGateway = vi.fn(async () => ({
      ok: true,
      aborted: true,
      runIds: ["gateway-run"],
    }));

    await terminateAcceptedCollectorRun({
      childSessionKey: "agent:main:subagent:child",
      gatewayRunId: "gateway-run",
      expectedSessionId: "session-id",
      expectedLifecycleRevision: "session-revision",
      callGateway,
    });

    expect(callGateway).toHaveBeenCalledOnce();
  });

  it("stops without deleting a durable session when the accepted run already ended", async () => {
    const callGateway = vi.fn(async () => ({
      ok: true,
      aborted: false,
      runIds: [],
    }));

    await terminateAcceptedCollectorRun({
      childSessionKey: "agent:main:subagent:child",
      gatewayRunId: "gateway-run",
      sessionCleanup: "preserve",
      callGateway,
    });

    expect(callGateway).toHaveBeenCalledOnce();
  });

  it("retries abort without deleting a durable session after a gateway error", async () => {
    const callGateway = vi
      .fn()
      .mockRejectedValueOnce(new Error("gateway unavailable"))
      .mockResolvedValueOnce({ ok: true, aborted: false, runIds: [] });

    await terminateAcceptedCollectorRun({
      childSessionKey: "agent:main:subagent:child",
      gatewayRunId: "gateway-run",
      sessionCleanup: "preserve",
      callGateway,
    });

    expect(callGateway).toHaveBeenCalledTimes(2);
    expect(callGateway).toHaveBeenNthCalledWith(2, {
      method: "chat.abort",
      params: {
        sessionKey: "agent:main:subagent:child",
        runId: "gateway-run",
      },
      timeoutMs: 60_000,
    });
  });

  it("stops accepted-run cleanup when its Gateway request owner is retired", async () => {
    const callGateway = vi
      .fn()
      .mockRejectedValueOnce(new Error("Gateway request owner is retired"))
      .mockResolvedValue({ aborted: false, runIds: [] });

    await withPluginRuntimeGatewayRequestScope(
      { resolveGatewayContext: () => undefined, isWebchatConnect: () => false },
      () =>
        terminateAcceptedCollectorRun({
          childSessionKey: "agent:main:subagent:child",
          gatewayRunId: "gateway-run",
          sessionCleanup: "preserve",
          callGateway,
        }),
    );

    expect(callGateway).toHaveBeenCalledOnce();
  });

  it("stops cleanup when guarded deletion observes a successor lifecycle", async () => {
    const callGateway = vi
      .fn()
      .mockResolvedValueOnce({ ok: true, aborted: true, runIds: ["different-run"] })
      .mockRejectedValueOnce(sessionChangedError());

    await expect(
      terminateAcceptedCollectorRun({
        childSessionKey: "agent:main:subagent:child",
        gatewayRunId: "gateway-run",
        expectedSessionId: "session-id",
        expectedLifecycleRevision: "session-revision",
        callGateway,
      }),
    ).resolves.toBeUndefined();

    expect(callGateway).toHaveBeenCalledTimes(2);
  });
});