import { configureStore } from '@reduxjs/toolkit';
import PayrollSettingsSlice, {
  fetchPayrollSettings,
  updatePayrollSettings,
} from '../PayrollSettingsSlice';

jest.mock('@/services/api/api', () => ({
  apiGet: jest.fn(),
  apiPut: jest.fn(),
}));

jest.mock('antd', () => ({
  message: { success: jest.fn(), error: jest.fn(), warning: jest.fn() },
}));

jest.mock('@/utilities/Helpers', () => {
  const mockHelpers = { handleServerError: jest.fn((e: any) => e?.message || 'Error') };
  return { __esModule: true, default: mockHelpers };
});

const { apiGet, apiPut } = require('@/services/api/api');

const createTestStore = () =>
  configureStore({ reducer: { payrollSettings: PayrollSettingsSlice.reducer } });

const mockSetting = { id: '1', key: 'pay_day', value: '25', group: 'general' };

describe('PayrollSettingsSlice', () => {
  beforeEach(() => jest.clearAllMocks());

  it('has correct initial state', () => {
    const store = createTestStore();
    const state = store.getState().payrollSettings;
    expect(state.settings).toEqual([]);
    expect(state.loading).toBe(false);
    expect(state.error).toBeNull();
  });

  describe('fetchPayrollSettings', () => {
    it('populates settings on fulfilled', async () => {
      apiGet.mockResolvedValue({ data: [mockSetting] });
      const store = createTestStore();
      await store.dispatch(fetchPayrollSettings());
      expect(store.getState().payrollSettings.settings).toEqual([mockSetting]);
    });

    it('sets error on rejected', async () => {
      apiGet.mockRejectedValue(new Error('fail'));
      const store = createTestStore();
      await store.dispatch(fetchPayrollSettings());
      expect(store.getState().payrollSettings.error).toBeTruthy();
    });
  });

  describe('updatePayrollSettings', () => {
    it('completes without error on fulfilled', async () => {
      apiPut.mockResolvedValue({ data: { message: 'Settings updated' } });
      const store = createTestStore();
      await store.dispatch(updatePayrollSettings({ settings: [] } as any));
      expect(store.getState().payrollSettings.loading).toBe(false);
      expect(store.getState().payrollSettings.error).toBeNull();
    });
  });
});