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

import { tokenStorage } from '@/api/tokenStorage';
import { authApi } from '@/features/auth/api/authApi';
import { useAuthStore } from '@/features/auth/store/authStore';

vi.mock('@/features/auth/api/authApi', () => ({
  authApi: {
    login: vi.fn(),
    logout: vi.fn(),
    refresh: vi.fn(),
    getMe: vi.fn(),
    listUsers: vi.fn(),
  },
}));

const mockedAuthApi = vi.mocked(authApi);

describe('authStore', () => {
  beforeEach(() => {
    tokenStorage.clear();
    useAuthStore.setState({ user: null, isInitializing: true });
    vi.clearAllMocks();
    mockedAuthApi.login.mockResolvedValue({
      accessToken: 'access-123',
      refreshToken: 'refresh-123',
      user: { id: 'u1', email: 'learner@aplp.io', name: 'Learner' },
    });
    mockedAuthApi.refresh.mockResolvedValue({
      accessToken: 'access-refreshed',
      refreshToken: 'refresh-refreshed',
      user: { id: 'u1', email: 'learner@aplp.io', name: 'Learner' },
    });
  });

  it('login stores token and user', async () => {
    await useAuthStore.getState().login('learner', 'secret');

    expect(mockedAuthApi.login).toHaveBeenCalledWith({
      username: 'learner',
      password: 'secret',
    });
    expect(tokenStorage.get()).toBe('access-123');
    expect(useAuthStore.getState().user?.email).toBe('learner@aplp.io');
    expect(useAuthStore.getState().isInitializing).toBe(false);
  });

  it('login failure leaves user signed out', async () => {
    mockedAuthApi.login.mockRejectedValue(new Error('invalid credentials'));

    await expect(useAuthStore.getState().login('learner', 'wrong')).rejects.toThrow(
      'invalid credentials',
    );
    expect(tokenStorage.get()).toBeNull();
    expect(useAuthStore.getState().user).toBeNull();
  });

  it('logout clears token and user even when API call fails', async () => {
    await useAuthStore.getState().login('learner', 'secret');
    mockedAuthApi.logout.mockRejectedValue(new Error('network'));

    await useAuthStore.getState().logout();

    expect(tokenStorage.get()).toBeNull();
    expect(useAuthStore.getState().user).toBeNull();
  });

  it('init restores session from refresh token', async () => {
    tokenStorage.set('old-access', 'refresh-123');

    await useAuthStore.getState().init();

    expect(mockedAuthApi.refresh).toHaveBeenCalledOnce();
    expect(mockedAuthApi.refresh).toHaveBeenCalledWith('refresh-123');
    expect(tokenStorage.get()).toBe('access-refreshed');
    expect(useAuthStore.getState().user?.id).toBe('u1');
    expect(useAuthStore.getState().isInitializing).toBe(false);
  });

  it('init skips refresh when no refresh token is stored', async () => {
    await useAuthStore.getState().init();

    expect(mockedAuthApi.refresh).not.toHaveBeenCalled();
    expect(tokenStorage.get()).toBeNull();
    expect(useAuthStore.getState().user).toBeNull();
    expect(useAuthStore.getState().isInitializing).toBe(false);
  });

  it('init handles expired refresh token gracefully', async () => {
    tokenStorage.set('old-access', 'refresh-expired');
    mockedAuthApi.refresh.mockRejectedValue(new Error('401'));

    await useAuthStore.getState().init();

    expect(tokenStorage.get()).toBeNull();
    expect(useAuthStore.getState().user).toBeNull();
    expect(useAuthStore.getState().isInitializing).toBe(false);
  });
});