import { configureStore } from '@reduxjs/toolkit';
import PublicHolidaysSlice, {
  fetchPublicHolidays,
  createPublicHoliday,
  updatePublicHoliday,
  deletePublicHoliday,
  seedGhanaHolidays,
} from '../PublicHolidaysSlice';

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 createStore = () =>
  configureStore({ reducer: { publicHolidays: PublicHolidaysSlice.reducer } });

const mockHoliday = { id: '1', name: 'Independence Day', date: '2026-03-06', country_code: 'GH' };

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

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

  it('sets loading on fetchPublicHolidays.pending', () => {
    const store = createStore();
    store.dispatch(fetchPublicHolidays.pending('req'));
    expect(store.getState().publicHolidays.loading).toBe(true);
  });

  it('populates data on fetchPublicHolidays.fulfilled', () => {
    const store = createStore();
    const data = [mockHoliday] as any;
    store.dispatch(fetchPublicHolidays.fulfilled(data, 'req'));
    expect(store.getState().publicHolidays.publicHolidays).toEqual(data);
    expect(store.getState().publicHolidays.loading).toBe(false);
  });

  describe('createPublicHoliday', () => {
    it('appends holiday and sorts by date on fulfilled', async () => {
      const newHoliday = { id: '2', name: 'Republic Day', date: '2026-07-01' };
      apiPost.mockResolvedValue({ data: { data: newHoliday } });
      const store = createStore();
      store.dispatch(fetchPublicHolidays.fulfilled([mockHoliday] as any, 'req'));
      await store.dispatch(createPublicHoliday({ name: 'Republic Day', date: '2026-07-01' } as any));
      const state = store.getState().publicHolidays;
      expect(state.publicHolidays).toHaveLength(2);
      expect(state.publicHolidays[0].date).toBe('2026-03-06');
      expect(state.publicHolidays[1].date).toBe('2026-07-01');
      expect(state.loading).toBe(false);
    });

    it('sets loading false on rejected', async () => {
      apiPost.mockRejectedValue({ isAxiosError: true, response: { data: { message: 'Validation error' } } });
      const store = createStore();
      await store.dispatch(createPublicHoliday({ name: '' } as any));
      expect(store.getState().publicHolidays.loading).toBe(false);
    });
  });

  describe('updatePublicHoliday', () => {
    it('updates holiday in list on fulfilled', async () => {
      const updated = { ...mockHoliday, name: 'Founders Day' };
      apiPut.mockResolvedValue({ data: { data: updated } });
      const store = createStore();
      store.dispatch(fetchPublicHolidays.fulfilled([mockHoliday] as any, 'req'));
      await store.dispatch(updatePublicHoliday({ id: '1', name: 'Founders Day' } as any));
      expect(store.getState().publicHolidays.publicHolidays[0].name).toBe('Founders Day');
      expect(store.getState().publicHolidays.loading).toBe(false);
    });

    it('sets loading false on rejected', async () => {
      apiPut.mockRejectedValue({ isAxiosError: true, response: { data: { message: 'Update failed' } } });
      const store = createStore();
      await store.dispatch(updatePublicHoliday({ id: '1', name: '' } as any));
      expect(store.getState().publicHolidays.loading).toBe(false);
    });
  });

  describe('deletePublicHoliday', () => {
    it('removes holiday from list on fulfilled', async () => {
      apiDelete.mockResolvedValue({ data: { message: 'Deleted' } });
      const store = createStore();
      store.dispatch(fetchPublicHolidays.fulfilled([mockHoliday] as any, 'req'));
      await store.dispatch(deletePublicHoliday('1'));
      expect(store.getState().publicHolidays.publicHolidays).toEqual([]);
      expect(store.getState().publicHolidays.loading).toBe(false);
    });
  });

  describe('seedGhanaHolidays', () => {
    it('sets loading false on fulfilled', async () => {
      apiPost.mockResolvedValue({ data: { message: 'Holidays seeded', count: 13 } });
      const store = createStore();
      await store.dispatch(seedGhanaHolidays({ year: 2026 } as any));
      expect(store.getState().publicHolidays.loading).toBe(false);
    });
  });

  describe('fetchPublicHolidays rejected', () => {
    it('sets loading false on rejection', () => {
      const store = createStore();
      store.dispatch(fetchPublicHolidays.pending('req'));
      expect(store.getState().publicHolidays.loading).toBe(true);
      store.dispatch(
        fetchPublicHolidays.rejected(null as any, 'req', undefined, { message: 'Test error' } as any),
      );
      expect(store.getState().publicHolidays.loading).toBe(false);
    });
  });
});