import { describe, it, expect, vi, beforeEach } from 'vitest';
import { screen, waitFor } from '@testing-library/react';
import userEvent from '@testing-library/user-event';

vi.mock('../../src/api/usrApi', () => ({
  fetchCompanies: vi.fn(),
  login: vi.fn(),
}));

import { fetchCompanies, login } from '../../src/api/usrApi';
import LoginPage from '../../src/pages/usr/Login/LoginPage';
import { renderWithProviders } from './renderLogin';

const mockedFetch = fetchCompanies as unknown as ReturnType<typeof vi.fn>;
const mockedLogin = login as unknown as ReturnType<typeof vi.fn>;

// 单项版本已自动选中（spec § 6.3），只需填用户名 / 密码即构成可提交表单
async function fillForm(user: ReturnType<typeof userEvent.setup>) {
  await user.type(screen.getByPlaceholderText('请输入你的用户名'), 'admin');
  await user.type(screen.getByPlaceholderText('请输入你的密码'), 'secret');
}

describe('LoginPage 提交中态', () => {
  beforeEach(() => {
    vi.clearAllMocks();
    localStorage.clear();
    mockedFetch.mockResolvedValue([{ id: 1, sCompanyName: '甲公司', sVersion: '标准版' }]);
  });

  it('button loading and fields disabled while submitting', async () => {
    mockedLogin.mockReturnValue(new Promise(() => {})); // pending
    renderWithProviders(<LoginPage />);
    expect(await screen.findByText('甲公司（标准版）')).toBeInTheDocument();
    const user = userEvent.setup();
    await user.type(screen.getByPlaceholderText('请输入你的用户名'), 'admin');
    await user.type(screen.getByPlaceholderText('请输入你的密码'), 'secret');
    const submit = screen.getByRole('button', { name: /登\s*录/ });
    await user.click(submit);
    // 按钮 loading
    await waitFor(() => expect(submit).toHaveClass('ant-btn-loading'));
    // 字段禁用
    expect(screen.getByPlaceholderText('请输入你的用户名')).toBeDisabled();
    expect(screen.getByPlaceholderText('请输入你的密码')).toBeDisabled();
  });

  it('ignores duplicate submit while pending', async () => {
    mockedLogin.mockReturnValue(new Promise(() => {})); // pending
    renderWithProviders(<LoginPage />);
    expect(await screen.findByText('甲公司（标准版）')).toBeInTheDocument();
    const user = userEvent.setup();
    await fillForm(user);
    const submit = screen.getByRole('button', { name: /登\s*录/ });
    await user.click(submit);
    await waitFor(() => expect(mockedLogin).toHaveBeenCalledTimes(1));
    // pending 期间再次点击 + 回车
    await user.click(submit);
    await user.keyboard('{Enter}');
    // 仍只调用一次
    await new Promise((r) => setTimeout(r, 50));
    expect(mockedLogin).toHaveBeenCalledTimes(1);
  });
});
