import { configureStore } from '@reduxjs/toolkit';
import CoursesSlice, { clearSelectedCourse } from '../CoursesSlice';

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', () => ({ default: { handleServerError: jest.fn((e) => e?.message || 'Error') } }));

const createStore = () => configureStore({ reducer: { c: CoursesSlice.reducer } });

describe('CoursesSlice', () => {
  it('has correct initial state', () => {
    const store = createStore();
    const state = store.getState().c;
    expect(state.courses).toEqual([]);
    expect(state.selectedCourse).toBeNull();
    expect(state.meta).toBeNull();
    expect(state.loading).toBe(false);
    expect(state.error).toBeNull();
  });

  it('sets loading on fetch pending', () => {
    const store = createStore();
    store.dispatch({ type: 'lmsCourses/fetch/pending' });
    expect(store.getState().c.loading).toBe(true);
  });

  it('populates courses and meta on fetch fulfilled', () => {
    const store = createStore();
    const meta = { current_page: 1, last_page: 1, per_page: 15, total: 1 };
    store.dispatch({ type: 'lmsCourses/fetch/fulfilled', payload: { data: [{ id: '1' }], meta } });
    expect(store.getState().c.courses).toEqual([{ id: '1' }]);
    expect(store.getState().c.meta).toEqual(meta);
  });

  it('sets selectedCourse on fetchOne fulfilled', () => {
    const store = createStore();
    store.dispatch({ type: 'lmsCourses/fetchOne/fulfilled', payload: { id: '1', title: 'Course 1' } });
    expect(store.getState().c.selectedCourse).toEqual({ id: '1', title: 'Course 1' });
  });

  it('sets selectedCourse on create fulfilled', () => {
    const store = createStore();
    store.dispatch({ type: 'lmsCourses/create/fulfilled', payload: { id: '1' } });
    expect(store.getState().c.selectedCourse).toEqual({ id: '1' });
  });

  it('removes on delete fulfilled', () => {
    const store = createStore();
    const meta = { current_page: 1, last_page: 1, per_page: 15, total: 1 };
    store.dispatch({ type: 'lmsCourses/fetch/fulfilled', payload: { data: [{ id: '1' }], meta } });
    store.dispatch({ type: 'lmsCourses/delete/fulfilled', payload: { id: '1', message: 'Deleted' } });
    expect(store.getState().c.courses).toEqual([]);
  });

  it('clears selectedCourse via clearSelectedCourse', () => {
    const store = createStore();
    store.dispatch({ type: 'lmsCourses/fetchOne/fulfilled', payload: { id: '1' } });
    store.dispatch(clearSelectedCourse());
    expect(store.getState().c.selectedCourse).toBeNull();
  });

  it('updates selectedCourse and courses on publish fulfilled', () => {
    const store = createStore();
    const meta = { current_page: 1, last_page: 1, per_page: 15, total: 1 };
    store.dispatch({ type: 'lmsCourses/fetch/fulfilled', payload: { data: [{ id: '1', status: 'draft', title: 'C1' }], meta } });
    store.dispatch({ type: 'lmsCourses/publish/fulfilled', payload: { id: '1', status: 'published', title: 'C1' } });
    expect(store.getState().c.selectedCourse).toEqual({ id: '1', status: 'published', title: 'C1' });
    expect(store.getState().c.courses[0].status).toBe('published');
  });
});