import { describe, expect, it, vi } from "vitest";
import {
  cleanupOwnedProcessGroup,
  observeOwnedProcessLineage,
  type ProcessOwnershipHost,
} from "../../../src/process/ProcessOwnership.js";
const ownership = {
  runId: "run-token",
  leaderPid: 100,
  processGroupId: 100,
};
const host = (
  environments: Readonly<Record<number, Readonly<Record<string, string>>>>,
): {
  readonly adapter: ProcessOwnershipHost;
  readonly signalGroup: ReturnType<typeof vi.fn>;
} => {
  const signalGroup = vi.fn();
  return {
    adapter: {
      listProcesses: () =>
        Promise.resolve(
          Object.keys(environments).map((pid) => ({
            pid: Number(pid),
            parentPid: Number(pid) === 100 ? 1 : 100,
            processGroupId: 100,
            state: "S",
            command: "fixture",
          })),
        ),
      environment: (pid) => Promise.resolve(environments[pid] ?? {}),
      signalGroup,
    },
    signalGroup,
  };
};
describe("owned process-group cleanup discovery", () => {
  it("fails before signaling when any descendant-group member is unowned", async () => {
    const signalGroup = vi.fn();
    const adapter: ProcessOwnershipHost = {
      listProcesses: () =>
        Promise.resolve([
          {
            pid: 100,
            parentPid: 1,
            processGroupId: 100,
            state: "S",
            command: "fixture",
          },
          {
            pid: 101,
            parentPid: 100,
            processGroupId: 101,
            state: "S",
            command: "child-session",
          },
          {
            pid: 104,
            parentPid: 101,
            processGroupId: 101,
            state: "S",
            command: "child-helper",
          },
        ]),
      environment: (pid) =>
        Promise.resolve({
          REA_PROCESS_RUN_ID: pid === 104 ? "other-run" : "run-token",
        }),
      signalGroup,
    };
    await expect(cleanupOwnedProcessGroup(ownership, adapter)).resolves.toEqual(
      {
        cleaned: false,
        reason: "process tree contains an unowned or PID-reused process",
        failures: [{ pid: 104, reason: "run-token-mismatch" }],
      },
    );
    expect(signalGroup).not.toHaveBeenCalled();
  });
  it("fails before signaling when a descendant group leader is not rooted", async () => {
    const signalGroup = vi.fn();
    const adapter: ProcessOwnershipHost = {
      listProcesses: () =>
        Promise.resolve([
          {
            pid: 100,
            parentPid: 1,
            processGroupId: 100,
            state: "S",
            command: "fixture",
          },
          {
            pid: 105,
            parentPid: 100,
            processGroupId: 101,
            state: "S",
            command: "descendant",
          },
          {
            pid: 101,
            parentPid: 999,
            processGroupId: 101,
            state: "S",
            command: "unrelated-group-leader",
          },
        ]),
      environment: () => Promise.resolve({ REA_PROCESS_RUN_ID: "run-token" }),
      signalGroup,
    };
    await expect(cleanupOwnedProcessGroup(ownership, adapter)).resolves.toEqual(
      {
        cleaned: false,
        reason:
          "descendant process-group leader identity could not be verified",
      },
    );
    expect(signalGroup).not.toHaveBeenCalled();
  });
  it("records sorted launcher and descendant lineage after token checks", async () => {
    const { adapter } = host({
      102: { REA_PROCESS_RUN_ID: "run-token" },
      100: { REA_PROCESS_RUN_ID: "run-token" },
      101: { REA_PROCESS_RUN_ID: "run-token" },
    });
    await expect(
      observeOwnedProcessLineage(ownership, adapter),
    ).resolves.toEqual({
      status: "verified",
      observedAt: expect.any(String),
      lineage: {
        schemaVersion: 1,
        runId: "run-token",
        launcherPid: 100,
        launcherParentPid: 1,
        processGroupId: 100,
        descendants: [
          { pid: 101, parentPid: 100, processGroupId: 100 },
          { pid: 102, parentPid: 100, processGroupId: 100 },
        ],
      },
    });
  });
});