import { configureStore } from '@reduxjs/toolkit';
import { BankSlice, fetchBanks, createBank, deleteBank, fetchBankBranches, createBankBranch, deleteBankBranch, importBanks, clearBankBranches } from '../BankSlice';

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

describe('BankSlice', () => {
  it('has correct initial state', () => {
    const store = createStore();
    const state = store.getState().banks;
    expect(state.banks).toEqual([]);
    expect(state.bankBranches).toEqual([]);
    expect(state.loading).toBe(false);
    expect(state.branchLoading).toBe(false);
    expect(state.importing).toBe(false);
    expect(state.error).toBeNull();
  });

  describe('reducers', () => {
    it('clearBankBranches resets bankBranches', () => {
      const store = createStore();
      store.dispatch({ type: fetchBankBranches.fulfilled.type, payload: [{ id: 'bb1' }] });
      store.dispatch(clearBankBranches());
      expect(store.getState().banks.bankBranches).toEqual([]);
    });
  });

  describe('fetchBanks', () => {
    it('sets loading on pending', () => {
      const store = createStore();
      store.dispatch({ type: fetchBanks.pending.type });
      expect(store.getState().banks.loading).toBe(true);
    });

    it('populates banks on fulfilled', () => {
      const store = createStore();
      const banks = [{ id: 'b1', name: 'GCB' }];
      store.dispatch({ type: fetchBanks.fulfilled.type, payload: banks });
      expect(store.getState().banks.banks).toEqual(banks);
      expect(store.getState().banks.loading).toBe(false);
    });
  });

  describe('createBank', () => {
    it('prepends bank on fulfilled', () => {
      const store = createStore();
      store.dispatch({ type: fetchBanks.fulfilled.type, payload: [{ id: 'b1' }] });
      store.dispatch({ type: createBank.fulfilled.type, payload: { id: 'b2', name: 'New' } });
      expect(store.getState().banks.banks[0].id).toBe('b2');
    });
  });

  describe('deleteBank', () => {
    it('removes bank on fulfilled', () => {
      const store = createStore();
      store.dispatch({ type: fetchBanks.fulfilled.type, payload: [{ id: 'b1' }, { id: 'b2' }] });
      store.dispatch({ type: deleteBank.fulfilled.type, payload: { id: 'b1', message: 'Deleted' } });
      expect(store.getState().banks.banks).toHaveLength(1);
    });
  });

  describe('fetchBankBranches', () => {
    it('populates bankBranches on fulfilled', () => {
      const store = createStore();
      const branches = [{ id: 'bb1', name: 'Main' }];
      store.dispatch({ type: fetchBankBranches.fulfilled.type, payload: branches });
      expect(store.getState().banks.bankBranches).toEqual(branches);
      expect(store.getState().banks.branchLoading).toBe(false);
    });
  });

  describe('createBankBranch', () => {
    it('prepends branch on fulfilled', () => {
      const store = createStore();
      store.dispatch({ type: fetchBankBranches.fulfilled.type, payload: [{ id: 'bb1' }] });
      store.dispatch({ type: createBankBranch.fulfilled.type, payload: { id: 'bb2' } });
      expect(store.getState().banks.bankBranches[0].id).toBe('bb2');
    });
  });

  describe('deleteBankBranch', () => {
    it('removes branch on fulfilled', () => {
      const store = createStore();
      store.dispatch({ type: fetchBankBranches.fulfilled.type, payload: [{ id: 'bb1' }, { id: 'bb2' }] });
      store.dispatch({ type: deleteBankBranch.fulfilled.type, payload: { id: 'bb1', message: 'Deleted' } });
      expect(store.getState().banks.bankBranches).toHaveLength(1);
    });
  });

  describe('importBanks', () => {
    it('sets importing on pending', () => {
      const store = createStore();
      store.dispatch({ type: importBanks.pending.type });
      expect(store.getState().banks.importing).toBe(true);
    });

    it('sets importing false on fulfilled', () => {
      const store = createStore();
      store.dispatch({ type: importBanks.fulfilled.type, payload: { message: 'Done', count: 5 } });
      expect(store.getState().banks.importing).toBe(false);
    });
  });
});