import { describe, it, expect, vi, beforeEach } from 'vitest';
import { render, screen, waitFor } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { ExportDocxDialog } from '@/components/modals/ExportDocxDialog';
import { useFileStore } from '@/stores/file-store';
import { useEditorStore } from '@/stores/editor-store';
import { useSettingsStore } from '@/stores/settings-store';

vi.mock('@/lib/ipc', () => ({
  ipc: {
    app: { showSaveDialog: vi.fn() },
    file: { writeBuffer: vi.fn() },
  },
}));

vi.mock('@/lib/docx-export', () => ({
  generateDocx: vi.fn().mockResolvedValue(
    new Blob([new Uint8Array(8)], {
      type: 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
    })
  ),
}));

import { ipc } from '@/lib/ipc';

beforeEach(() => {
  localStorage.clear();
  vi.clearAllMocks();
  (window.electronAPI as any) = {};
  (ipc.app.showSaveDialog as any).mockImplementation(async (args) => ({
    ok: true,
    data: args?.defaultPath ?? '/out.docx',
  }));
  (ipc.file.writeBuffer as any).mockResolvedValue({ ok: true });
  useSettingsStore.setState(useSettingsStore.getInitialState());
  useFileStore.setState({
    activeTabId: '/test.md',
    openTabs: [{ id: '/test.md', path: '/test.md', title: 'test.md', dirty: false }],
  } as any);
  useEditorStore.setState({
    buffers: new Map([
      ['/test.md', { id: '/test.md', path: '/test.md', content: '# hi', dirty: false }],
    ]),
  } as any);
});

describe('ExportDocxDialog', () => {
  it('renders with standard template selected by default', () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    expect(screen.getByText(/export to docx/i)).toBeInTheDocument();
    expect(screen.getByRole('combobox', { name: /template/i })).toBeInTheDocument();
  });

  it('shows reference doc input', () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    expect(screen.getByLabelText(/reference document path/i)).toBeInTheDocument();
  });

  it('shows TOC toggle and number sections toggle', () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    expect(screen.getByRole('switch', { name: /table of contents/i })).toBeInTheDocument();
    expect(screen.getByRole('switch', { name: /number sections/i })).toBeInTheDocument();
  });

  it('shows TOC depth when TOC is enabled', async () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    await userEvent.click(screen.getByRole('switch', { name: /table of contents/i }));
    expect(screen.getByLabelText(/toc depth/i)).toBeInTheDocument();
  });

  it('shows bibliography input', () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    expect(screen.getByLabelText(/bibliography file path/i)).toBeInTheDocument();
  });

  it('submitting with default options writes a docx buffer', async () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    await userEvent.click(screen.getByRole('button', { name: /^export$/i }));
    await waitFor(() => expect(ipc.app.showSaveDialog).toHaveBeenCalledTimes(1));
    expect(ipc.file.writeBuffer).toHaveBeenCalledTimes(1);
    const callArg = (ipc.file.writeBuffer as any).mock.calls[0][0];
    expect(callArg.path).toBe('/test.docx');
    expect(callArg.buffer).toBeDefined();
    expect(callArg.buffer.length).toBeGreaterThan(0);
  });

  it('selecting "modern" template is reflected in the rendered form', async () => {
    render(<ExportDocxDialog sourcePath="/test.md" />);
    await userEvent.click(screen.getByRole('combobox', { name: /template/i }));
    await userEvent.click(screen.getByRole('option', { name: /modern/i }));
    expect(screen.getByRole('combobox', { name: /template/i })).toHaveTextContent(/modern/i);
  });

  it('sends options via electronAPI.export.withOptions when available', async () => {
    const mockWithOptions = vi.fn().mockResolvedValue({ ok: true });
    (window.electronAPI as any) = {
      export: { withOptions: mockWithOptions },
    };
    render(<ExportDocxDialog sourcePath="/test.md" />);
    await userEvent.click(screen.getByRole('button', { name: /^export$/i }));
    await waitFor(() => expect(mockWithOptions).toHaveBeenCalledWith('docx', expect.any(Object)));
    expect(mockWithOptions.mock.calls[0][1].toc).toBe(false);
    expect(mockWithOptions.mock.calls[0][1].numberSections).toBe(false);
  });
});
