import { beforeEach, describe, expect, it, vi } from 'vitest';
import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
import { TitleBar } from '@/components/layout/TitleBar';
import { useSettingsStore } from '@/stores/settings';

const invokeIpcMock = vi.hoisted(() => vi.fn());

vi.mock('@/lib/api-client', () => ({
  invokeIpc: (...args: unknown[]) => invokeIpcMock(...args),
}));

describe('TitleBar platform behavior', () => {
  beforeEach(() => {
    invokeIpcMock.mockReset();
    invokeIpcMock.mockResolvedValue(false);
    useSettingsStore.setState({ sidebarCollapsed: false });
  });

  it('extends the product surfaces through the macOS title bar', () => {
    window.electron.platform = 'darwin';

    render(<TitleBar integrated />);

    expect(screen.getByTestId('product-titlebar')).not.toHaveClass('border-b');
    expect(screen.getByTestId('product-titlebar')).not.toHaveClass('drag-region');
    expect(screen.getByTestId('product-titlebar')).toHaveClass('glass-surface', 'bg-background/70');
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-64', 'sidebar-glass-surface', 'border-r');
    expect(screen.getByTestId('titlebar-main-surface')).toHaveClass('border-b', 'bg-background', 'drag-region');
    expect(screen.getByTestId('titlebar-project-context')).not.toHaveClass('border-l');
    expect(screen.getByTestId('titlebar-project-context')).not.toHaveClass('translate-y-[3px]');
    expect(screen.getByTestId('titlebar-logo')).toHaveClass('absolute', 'top-1/2', 'bg-background');
    expect(screen.getByTestId('titlebar-logo')).toHaveStyle({ right: 'var(--agent-browser-titlebar-logo-gap, 48px)' });
    expect(screen.getByTestId('titlebar-logo').querySelector('img')).toHaveAttribute('data-logo-source', 'original-wordmark');
    expect(screen.getByTestId('titlebar-sidebar-toggle-layer')).toHaveClass('no-drag', 'pointer-events-auto', 'fixed', 'left-0', 'top-0', 'z-[400]', 'h-10', 'w-[132px]');
    expect(screen.getByTestId('titlebar-sidebar-toggle')).toHaveClass('no-drag', 'pointer-events-auto', 'absolute', 'top-1', 'z-[401]', 'left-[88px]');
    expect(screen.getByTestId('titlebar-project-context')).toHaveTextContent('Makelore 工作台');
    expect(screen.queryByRole('button', { name: '打开项目位置' })).not.toBeInTheDocument();
    expect(screen.queryByRole('button', { name: '后退' })).not.toBeInTheDocument();
    expect(screen.queryByRole('button', { name: '前进' })).not.toBeInTheDocument();
    fireEvent.click(screen.getByRole('button', { name: '折叠侧栏' }));
    expect(useSettingsStore.getState().sidebarCollapsed).toBe(true);

    act(() => useSettingsStore.setState({ sidebarCollapsed: true }));

    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-[132px]');
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('border-r-0');
    expect(screen.getByTestId('product-titlebar')).toHaveClass('bg-background');
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('bg-background');
    expect(screen.getByTestId('product-titlebar')).toHaveClass('border-b');
    expect(screen.getByTestId('titlebar-main-surface')).toHaveClass('border-b-0');
    expect(screen.getByTestId('titlebar-sidebar-toggle')).toBeVisible();
  });

  it('keeps the collapsed sidebar expand control above the titlebar drag surfaces', () => {
    window.electron.platform = 'darwin';
    useSettingsStore.setState({ sidebarCollapsed: true });

    render(<TitleBar integrated workspaceLayout />);

    const toggle = screen.getByRole('button', { name: '展开侧栏' });
    expect(screen.getByTestId('titlebar-sidebar-toggle-layer')).toContainElement(toggle);
    expect(screen.getByTestId('product-titlebar')).not.toHaveClass('border-b');
    expect(toggle).toHaveClass('pointer-events-auto', 'z-[401]');

    fireEvent.click(toggle);
    expect(useSettingsStore.getState().sidebarCollapsed).toBe(false);
  });

  it('renders macOS drag region', () => {
    window.electron.platform = 'darwin';

    const { container } = render(<TitleBar />);

    expect(container.querySelector('.drag-region')).toBeInTheDocument();
    expect(screen.queryByTitle('Minimize')).not.toBeInTheDocument();
    expect(invokeIpcMock).not.toHaveBeenCalled();
  });

  it('aligns the chat workspace title rail with the four-column layout', () => {
    window.electron.platform = 'darwin';

    render(<TitleBar integrated workspaceLayout />);

    expect(screen.getByTestId('product-titlebar')).not.toHaveClass('glass-surface', 'border-b');
    expect(screen.getByTestId('product-titlebar')).toHaveClass('bg-transparent');
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass(
      'w-[256px]',
      'min-w-[256px]',
      'basis-[256px]',
    );
    expect(screen.getByTestId('titlebar-main-surface')).toHaveClass('border-b-0');
    expect(screen.getByTestId('titlebar-conversation-surface')).toHaveClass('w-[256px]', 'bg-surface-tertiary', 'border-r');
    expect(screen.getByTestId('titlebar-conversation-surface')).toHaveStyle({ left: '0px' });
    expect(screen.queryByTestId('titlebar-project-context')).not.toBeInTheDocument();
  });

  it('previews the collapsed sidebar on hover and pins it on click', () => {
    window.electron.platform = 'darwin';
    useSettingsStore.setState({ sidebarCollapsed: true });
    const onSidebarPeekChange = vi.fn();

    render(<TitleBar integrated onSidebarPeekChange={onSidebarPeekChange} />);

    const toggle = screen.getByTestId('titlebar-sidebar-toggle');
    fireEvent.pointerEnter(toggle);
    expect(onSidebarPeekChange).toHaveBeenCalledWith(true, 'toggle');

    fireEvent.pointerLeave(toggle);
    expect(onSidebarPeekChange).toHaveBeenCalledWith(false, 'toggle');

    fireEvent.click(toggle);
    expect(useSettingsStore.getState().sidebarCollapsed).toBe(false);
  });

  it('keeps the chat titlebar rail fixed while the collapsed sidebar previews', () => {
    window.electron.platform = 'darwin';
    useSettingsStore.setState({ sidebarCollapsed: true });

    const { rerender } = render(<TitleBar integrated workspaceLayout sidebarPeekOpen={false} />);
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-[132px]');
    expect(screen.getByTestId('titlebar-conversation-surface')).toHaveStyle({ left: '-132px' });

    rerender(<TitleBar integrated workspaceLayout sidebarPeekOpen />);

    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-[132px]');
    expect(screen.getByTestId('titlebar-conversation-surface')).toHaveStyle({ left: '-132px' });
  });

  it('extends the ordinary titlebar sidebar surface during a hover preview', () => {
    window.electron.platform = 'darwin';
    useSettingsStore.setState({ sidebarCollapsed: true });

    const { rerender } = render(<TitleBar integrated sidebarPeekOpen={false} />);
    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-[132px]', 'border-r-0');

    rerender(<TitleBar integrated sidebarPeekOpen />);

    expect(screen.getByTestId('titlebar-sidebar-surface')).toHaveClass('w-64', 'sidebar-peek-surface', 'border-r');
    expect(screen.getByTestId('titlebar-sidebar-surface')).not.toHaveClass('sidebar-glass-surface');
    expect(screen.getByTestId('titlebar-sidebar-surface')).not.toHaveClass('border-r-0');
    expect(screen.getByTestId('product-titlebar')).not.toHaveClass('border-b');

    const onSidebarPeekChange = vi.fn();
    rerender(<TitleBar integrated sidebarPeekOpen onSidebarPeekChange={onSidebarPeekChange} />);
    const surface = screen.getByTestId('titlebar-sidebar-surface');
    fireEvent.pointerEnter(surface);
    fireEvent.pointerLeave(surface);
    expect(onSidebarPeekChange).toHaveBeenNthCalledWith(1, true, 'titlebar');
    expect(onSidebarPeekChange).toHaveBeenNthCalledWith(2, false, 'titlebar');
  });

  it('renders custom controls on Windows', async () => {
    window.electron.platform = 'win32';

    render(<TitleBar />);

    expect(screen.getByTitle('Minimize')).toBeInTheDocument();
    expect(screen.getByTitle('Maximize')).toBeInTheDocument();
    expect(screen.getByTitle('Close')).toBeInTheDocument();

    await waitFor(() => {
      expect(invokeIpcMock).toHaveBeenCalledWith('window:isMaximized');
    });
  });

  it('renders no custom title bar on Linux', () => {
    window.electron.platform = 'linux';

    const { container } = render(<TitleBar />);

    expect(container.firstChild).toBeNull();
    expect(screen.queryByTitle('Minimize')).not.toBeInTheDocument();
    expect(invokeIpcMock).not.toHaveBeenCalled();
  });
});