import {
  ACTIVITY_STORAGE_KEY,
  SESSION_START_STORAGE_KEY,
  AUTH_PRESENCE_KEY,
  INACTIVITY_TIMEOUT_MS,
  ABSOLUTE_SESSION_TIMEOUT_MS,
  markActivity,
  markSessionStart,
  isSessionActive,
  performSessionLogout
} from '@/utils/session';

/**
 * The shared logout contract. Every logout path — the manual button and the
 * inactivity timer — goes through here so they cannot clear different things.
 *
 * The security-relevant property is that local state is wiped and the page
 * HARD-navigates even when a caller-supplied teardown throws: a half-completed
 * logout that leaves an authenticated page rendered is the failure mode this
 * module exists to prevent.
 */
describe('session', () => {
  let replace;

  beforeEach(() => {
    replace = jest.fn();
    Object.defineProperty(window, 'location', {
      writable: true,
      configurable: true,
      value: { href: 'http://console.local/deliveries', replace }
    });
  });

  describe('timeout policy', () => {
    it('should expire an idle session after one hour', () => {
      expect(INACTIVITY_TIMEOUT_MS).toBe(60 * 60 * 1000);
    });

    it('should cap a session at one hour since login regardless of activity', () => {
      expect(ABSOLUTE_SESSION_TIMEOUT_MS).toBe(60 * 60 * 1000);
    });
  });

  describe('markActivity', () => {
    it('should record the current time as a millisecond string', () => {
      jest.useFakeTimers().setSystemTime(new Date('2026-08-27T10:00:00Z'));
      markActivity();
      expect(localStorage.getItem(ACTIVITY_STORAGE_KEY)).toBe(String(Date.now()));
      jest.useRealTimers();
    });

    it('should overwrite the previous activity stamp', () => {
      jest.useFakeTimers().setSystemTime(new Date('2026-08-27T10:00:00Z'));
      markActivity();
      const first = localStorage.getItem(ACTIVITY_STORAGE_KEY);

      jest.setSystemTime(new Date('2026-08-27T10:05:00Z'));
      markActivity();

      expect(localStorage.getItem(ACTIVITY_STORAGE_KEY)).not.toBe(first);
      expect(Number(localStorage.getItem(ACTIVITY_STORAGE_KEY))).toBeGreaterThan(Number(first));
      jest.useRealTimers();
    });
  });

  describe('markSessionStart', () => {
    it('should start the absolute-lifetime clock separately from the activity clock', () => {
      jest.useFakeTimers().setSystemTime(new Date('2026-08-27T10:00:00Z'));
      markSessionStart();
      expect(localStorage.getItem(SESSION_START_STORAGE_KEY)).toBe(String(Date.now()));
      expect(localStorage.getItem(ACTIVITY_STORAGE_KEY)).toBeNull();
      jest.useRealTimers();
    });
  });

  describe('isSessionActive', () => {
    it('should report an active session when the auth presence key is set', () => {
      localStorage.setItem(AUTH_PRESENCE_KEY, 'ops@doormile.com');
      expect(isSessionActive()).toBe(true);
    });

    it('should report no session when the key is absent', () => {
      expect(isSessionActive()).toBe(false);
    });

    it('should report no session for an empty presence value', () => {
      localStorage.setItem(AUTH_PRESENCE_KEY, '');
      expect(isSessionActive()).toBe(false);
    });

    it('should return a boolean, not the stored string', () => {
      localStorage.setItem(AUTH_PRESENCE_KEY, 'ops@doormile.com');
      expect(typeof isSessionActive()).toBe('boolean');
    });
  });

  describe('performSessionLogout', () => {
    it('should wipe all local state and hard-navigate to login', () => {
      localStorage.setItem('doormileToken', 'jwt-abc');
      localStorage.setItem(AUTH_PRESENCE_KEY, 'ops@doormile.com');
      localStorage.setItem('anything-else', 'x');

      performSessionLogout();

      expect(localStorage.length).toBe(0);
      expect(replace).toHaveBeenCalledWith('/login');
    });

    it('should clear the react-query cache so no fetched data survives', () => {
      const queryClient = { clear: jest.fn() };
      performSessionLogout({ queryClient });
      expect(queryClient.clear).toHaveBeenCalledTimes(1);
    });

    it('should dispatch the supplied teardown actions', () => {
      const dispatch = jest.fn();
      const clearFcmToken = jest.fn(() => ({ type: 'fcm/clear' }));
      const logoutUser = jest.fn(() => ({ type: 'auth/logout' }));

      performSessionLogout({ dispatch, clearFcmToken, logoutUser });

      expect(dispatch).toHaveBeenCalledWith({ type: 'fcm/clear' });
      expect(dispatch).toHaveBeenCalledWith({ type: 'auth/logout' });
    });

    it('should skip the redux teardown when no dispatch is supplied', () => {
      const clearFcmToken = jest.fn();
      expect(() => performSessionLogout({ clearFcmToken })).not.toThrow();
      expect(clearFcmToken).not.toHaveBeenCalled();
    });

    it('should work with no arguments at all', () => {
      expect(() => performSessionLogout()).not.toThrow();
      expect(replace).toHaveBeenCalledWith('/login');
    });

    it('should still wipe storage and redirect when the cache teardown throws', () => {
      // The security-critical guarantee: a broken teardown must not leave an
      // authenticated page rendered over live local state.
      localStorage.setItem('doormileToken', 'jwt-abc');
      const queryClient = {
        clear: jest.fn(() => {
          throw new Error('cache blew up');
        })
      };

      expect(() => performSessionLogout({ queryClient })).toThrow('cache blew up');
      expect(localStorage.length).toBe(0);
      expect(replace).toHaveBeenCalledWith('/login');
    });

    it('should still wipe storage and redirect when a dispatched action throws', () => {
      localStorage.setItem('doormileToken', 'jwt-abc');
      const dispatch = jest.fn(() => {
        throw new Error('reducer blew up');
      });

      expect(() =>
        performSessionLogout({ dispatch, logoutUser: () => ({ type: 'auth/logout' }) })
      ).toThrow('reducer blew up');
      expect(localStorage.length).toBe(0);
      expect(replace).toHaveBeenCalledWith('/login');
    });

    it('should navigate rather than route, so the back button cannot resurrect the console', () => {
      performSessionLogout();
      expect(replace).toHaveBeenCalledTimes(1);
      expect(replace).toHaveBeenCalledWith('/login');
    });
  });
});