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

// Mock the per-key mutex module BEFORE importing fire-reminder so the
// runtime sees our spy when it dereferences `accountMutex.run`.
vi.mock("./per-key-mutex.js", () => {
  return {
    PerKeyMutex: class {},
    accountMutex: {
      run: vi.fn(async (_key: string, fn: () => Promise<unknown>) => fn()),
    },
  };
});

// Stub everything fire-reminder pulls in so the import succeeds without
// actually starting a Baileys session, hitting the DB, or talking to
// pg-boss.
const getReminderMock = vi.fn();
vi.mock("../reminders/crud.js", () => ({
  getReminderWithDetails: (...args: unknown[]) => getReminderMock(...args),
}));
vi.mock("../db.js", () => ({
  db: {
    insert: () => ({ values: () => ({ returning: async () => [{ id: "run-1" }] }) }),
    update: () => ({ set: () => ({ where: async () => undefined }) }),
    query: {
      whatsappGroups: { findMany: async () => [] },
      mediaFiles: { findMany: async () => [] },
    },
  },
}));
vi.mock("../whatsapp/session-manager.js", () => ({
  sessionManager: { getSession: () => null },
}));
vi.mock("../ipc/notify.js", () => ({ pgNotifyWeb: vi.fn(async () => undefined) }));
vi.mock("../audit.js", () => ({ writeAuditLog: vi.fn(async () => undefined) }));
vi.mock("./pgboss-client.js", () => ({ getBoss: () => ({}) }));
vi.mock("./reminder-jobs.js", () => ({ scheduleReminderFire: vi.fn() }));

import { fireReminder } from "./fire-reminder.js";
import { accountMutex } from "./per-key-mutex.js";

describe("fireReminder", () => {
  beforeEach(() => {
    vi.mocked(accountMutex.run).mockClear();
    getReminderMock.mockReset();
  });

  it("acquires accountMutex keyed by accountId for active reminders", async () => {
    getReminderMock.mockResolvedValue({
      id: "r-1",
      accountId: "acct-A",
      status: "active",
      targets: [],
      messages: [],
      createdBy: "op-1",
      scheduleKind: "one_off",
      rrule: null,
      timezone: "Asia/Kuala_Lumpur",
      name: "Test",
    });

    await fireReminder({ reminderId: "r-1" });

    expect(accountMutex.run).toHaveBeenCalledTimes(1);
    expect(accountMutex.run).toHaveBeenCalledWith("acct-A", expect.any(Function));
  });

  it("does NOT acquire the mutex when the reminder is inactive", async () => {
    getReminderMock.mockResolvedValue({
      id: "r-1",
      accountId: "acct-A",
      status: "ended",
      targets: [],
      messages: [],
      createdBy: "op-1",
      scheduleKind: "one_off",
      rrule: null,
      timezone: "Asia/Kuala_Lumpur",
      name: "Test",
    });

    await fireReminder({ reminderId: "r-1" });

    expect(accountMutex.run).not.toHaveBeenCalled();
  });

  it("does NOT acquire the mutex when the reminder row is missing", async () => {
    getReminderMock.mockResolvedValue(undefined);

    await fireReminder({ reminderId: "r-missing" });

    expect(accountMutex.run).not.toHaveBeenCalled();
  });

  it("uses different mutex keys for different accounts (cross-account isolation)", async () => {
    getReminderMock.mockResolvedValueOnce({
      id: "r-A",
      accountId: "acct-A",
      status: "active",
      targets: [],
      messages: [],
      createdBy: "op-1",
      scheduleKind: "one_off",
      rrule: null,
      timezone: "Asia/Kuala_Lumpur",
      name: "A",
    });
    getReminderMock.mockResolvedValueOnce({
      id: "r-B",
      accountId: "acct-B",
      status: "active",
      targets: [],
      messages: [],
      createdBy: "op-1",
      scheduleKind: "one_off",
      rrule: null,
      timezone: "Asia/Kuala_Lumpur",
      name: "B",
    });

    await fireReminder({ reminderId: "r-A" });
    await fireReminder({ reminderId: "r-B" });

    const calls = vi.mocked(accountMutex.run).mock.calls;
    expect(calls[0]?.[0]).toBe("acct-A");
    expect(calls[1]?.[0]).toBe("acct-B");
  });
});