import React from 'react';
import '@testing-library/jest-dom';
import { fireEvent, render, screen, waitFor } from '@testing-library/react';
import { ConfirmProvider } from './confirm';
import { PromptProvider } from './prompt';
import Attachments from './components/Attachments';
import { ToastProvider } from './toast';
import { I18nProvider } from './i18n/I18nProvider';
import { api } from './api';

jest.mock('./api', () => ({
  getApiErrorMessage: (_error: unknown, fallback: string) => fallback,
  api: {
    get: jest.fn(),
    post: jest.fn(),
    patch: jest.fn(),
    delete: jest.fn(),
  },
}));

const mockedApi = api as jest.Mocked<typeof api>;

beforeEach(() => jest.clearAllMocks());

test.each([
  ['en', 'Preview: resume.pdf', 'Preview: resume.pdf'],
  ['nb', 'Forhåndsvis: resume.pdf', 'Forhåndsvisning: resume.pdf'],
])('PDF preview identifies the document in %s', async (language, buttonName, frameTitle) => {
  const previousLanguage = localStorage.getItem('uiLanguage');
  const originalCreate = URL.createObjectURL;
  const originalRevoke = URL.revokeObjectURL;
  localStorage.setItem('uiLanguage', language);
  URL.createObjectURL = jest.fn(() => 'blob:attachment-preview');
  URL.revokeObjectURL = jest.fn();
  mockedApi.get.mockResolvedValueOnce({ data: [{ id: 7, fileName: 'resume.pdf', fileType: 'application/pdf', fileSize: 2048, uploadDate: '2026-11-02T10:00:00Z' }] } as any);
  mockedApi.get.mockResolvedValueOnce({ data: new Blob(['sample'], { type: 'application/pdf' }) } as any);
  const view = render(<ToastProvider><I18nProvider><ConfirmProvider><PromptProvider><Attachments jobId={42} /></PromptProvider></ConfirmProvider></I18nProvider></ToastProvider>);
  try {
    fireEvent.click(await screen.findByRole('button', { name: buttonName }));
    const frame = await screen.findByTitle(frameTitle);
    expect(frame.tagName).toBe('IFRAME');
    expect(frame).toHaveAttribute('src', 'blob:attachment-preview');
  } finally {
    view.unmount();
    URL.createObjectURL = originalCreate;
    URL.revokeObjectURL = originalRevoke;
    if (previousLanguage === null) localStorage.removeItem('uiLanguage');
    else localStorage.setItem('uiLanguage', previousLanguage);
  }
});

test('attachments empty state renders drag and drop guidance', async () => {
  mockedApi.get.mockResolvedValueOnce({ data: [] } as any);

  render(
    <ToastProvider>
      <I18nProvider>
        <ConfirmProvider>
          <PromptProvider>
            <Attachments jobId={42} />
          </PromptProvider>
        </ConfirmProvider>
      </I18nProvider>
    </ToastProvider>,
  );

  expect(await screen.findByText(/drag and drop files here/i)).toBeInTheDocument();
  expect(await screen.findByText(/no attachments yet/i)).toBeInTheDocument();
  expect(screen.getByText(/max 10 mb each/i)).toBeInTheDocument();
});

test('attachments metadata controls update purpose and ai usage', async () => {
  mockedApi.get.mockResolvedValueOnce({
    data: [
      {
        id: 7,
        fileName: 'resume.pdf',
        uploadDate: new Date().toISOString(),
        fileType: 'application/pdf',
        fileSize: 2048,
        purpose: 'resume',
        useForAi: true,
      },
    ],
  } as any);
  mockedApi.patch.mockResolvedValue({ data: {} } as any);

  render(
    <ToastProvider>
      <I18nProvider>
        <ConfirmProvider>
          <PromptProvider>
            <Attachments jobId={42} />
          </PromptProvider>
        </ConfirmProvider>
      </I18nProvider>
    </ToastProvider>,
  );

  expect(await screen.findByDisplayValue(/resume/i)).toBeInTheDocument();
  expect(screen.getByRole('button', { name: 'Preview: resume.pdf' })).toBeInTheDocument();
  expect(screen.getByRole('button', { name: 'Download: resume.pdf' })).toBeInTheDocument();
  expect(screen.getByRole('button', { name: 'Rename: resume.pdf' })).toBeInTheDocument();
  expect(screen.getByRole('button', { name: 'Delete: resume.pdf' })).toBeInTheDocument();
  expect(screen.getAllByRole('columnheader')).toHaveLength(8);
  expect(screen.getByRole('columnheader', { name: 'Uploaded' })).toBeInTheDocument();

  fireEvent.mouseDown(screen.getByRole('combobox', { name: /purpose/i }));
  fireEvent.click(await screen.findByRole('option', { name: /portfolio/i }));

  await waitFor(() => {
    expect(mockedApi.patch).toHaveBeenCalledWith('/attachments/7', expect.objectContaining({ purpose: 'portfolio', useForAi: true }));
  });

  fireEvent.click(screen.getByRole('switch', { name: 'Use for AI: resume.pdf' }));

  await waitFor(() => {
    expect(mockedApi.patch).toHaveBeenCalledWith('/attachments/7', expect.objectContaining({ purpose: 'portfolio', useForAi: false }));
  });
});

test('attachment failures remain explicit and retry restores the real empty state', async () => {
  mockedApi.get.mockRejectedValueOnce({ response: { status: 503 } }).mockResolvedValueOnce({ data: [] } as any);
  render(<ToastProvider><I18nProvider><ConfirmProvider><PromptProvider><Attachments jobId={42} /></PromptProvider></ConfirmProvider></I18nProvider></ToastProvider>);
  expect(await screen.findByRole('alert')).toHaveTextContent("Could not load this application's attachments.");
  expect(screen.queryByText(/no attachments yet/i)).not.toBeInTheDocument();
  fireEvent.click(screen.getByRole('button', { name: 'Retry' }));
  expect(await screen.findByText(/no attachments yet/i)).toBeInTheDocument();
  expect(mockedApi.get).toHaveBeenCalledTimes(2);
  expect(mockedApi.post).not.toHaveBeenCalled();
});