import { configureStore } from '@reduxjs/toolkit';
import ProvidentFundOverridesSlice, {
  fetchProvidentFundOverrides,
  createProvidentFundEnrollment,
  updateProvidentFundOverride,
  deleteProvidentFundEnrollment,
  bulkUpdateProvidentFund,
} from '../ProvidentFundOverridesSlice';

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

const createTestStore = () =>
  configureStore({ reducer: { providentFundOverrides: ProvidentFundOverridesSlice.reducer } });

const mockOverride = { id: '1', employee_id: 'e1', employee_rate: 5, employer_rate: 13 };

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

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

  describe('fetchProvidentFundOverrides', () => {
    it('handles array response', async () => {
      apiGet.mockResolvedValue({ data: [mockOverride] });
      const store = createTestStore();
      await store.dispatch(fetchProvidentFundOverrides());
      expect(store.getState().providentFundOverrides.overrides).toEqual([mockOverride]);
      expect(store.getState().providentFundOverrides.meta).toBeNull();
    });

    it('handles paginated response', async () => {
      const meta = { current_page: 1, last_page: 1, per_page: 15, total: 1 };
      apiGet.mockResolvedValue({ data: { data: [mockOverride], meta } });
      const store = createTestStore();
      await store.dispatch(fetchProvidentFundOverrides());
      expect(store.getState().providentFundOverrides.overrides).toEqual([mockOverride]);
      expect(store.getState().providentFundOverrides.meta).toEqual(meta);
    });
  });

  describe('createProvidentFundEnrollment', () => {
    it('prepends new enrollment on fulfilled', async () => {
      apiPost.mockResolvedValue({ data: { data: mockOverride } });
      const store = createTestStore();
      await store.dispatch(createProvidentFundEnrollment({ employee_id: 'e1' } as any));
      expect(store.getState().providentFundOverrides.overrides[0]).toEqual(mockOverride);
    });
  });

  describe('updateProvidentFundOverride', () => {
    it('updates override in list on fulfilled', async () => {
      const updated = { ...mockOverride, employee_rate: 7 };
      apiPut.mockResolvedValue({ data: { data: updated } });
      const store = createTestStore();
      store.dispatch({ type: fetchProvidentFundOverrides.fulfilled.type, payload: { data: [mockOverride], meta: null } });
      await store.dispatch(updateProvidentFundOverride({ employee_id: 'e1', employee_rate: 7 } as any));
      expect(store.getState().providentFundOverrides.overrides[0].employee_rate).toBe(7);
    });
  });

  describe('deleteProvidentFundEnrollment', () => {
    it('removes override from list on fulfilled', async () => {
      apiDelete.mockResolvedValue({});
      const store = createTestStore();
      store.dispatch({ type: fetchProvidentFundOverrides.fulfilled.type, payload: { data: [mockOverride], meta: null } });
      await store.dispatch(deleteProvidentFundEnrollment('1'));
      expect(store.getState().providentFundOverrides.overrides).toEqual([]);
    });
  });

  describe('bulkUpdateProvidentFund', () => {
    it('completes without error on fulfilled', async () => {
      apiPost.mockResolvedValue({ data: { message: 'Bulk updated' } });
      const store = createTestStore();
      await store.dispatch(bulkUpdateProvidentFund({ updates: [] } as any));
      expect(store.getState().providentFundOverrides.loading).toBe(false);
    });
  });
});