import React from 'react';
import { render, screen, fireEvent, waitFor } from '@testing-library/react';
import userEvent from '@testing-library/user-event';
import { MemoryRouter, useNavigate } from 'react-router-dom';
import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
import { RecoilRoot } from 'recoil';

import type t from 'librechat-data-provider';

import AgentDetail from '../AgentDetail';
import { useToast } from '~/hooks';
import useLocalize from '~/hooks/useLocalize';

// Mock dependencies
jest.mock('react-router-dom', () => ({
  ...jest.requireActual('react-router-dom'),
  useNavigate: jest.fn(),
}));

jest.mock('~/hooks', () => ({
  useToast: jest.fn(),
}));

jest.mock('~/hooks/useLocalize', () => ({
  __esModule: true,
  default: jest.fn(),
}));

jest.mock('~/utils/agents', () => ({
  renderAgentAvatar: jest.fn((agent, options) => (
    <div data-testid="agent-avatar" data-size={options?.size} />
  )),
}));

// Mock clipboard API
Object.assign(navigator, {
  clipboard: {
    writeText: jest.fn(),
  },
});

const mockNavigate = jest.fn();
const mockShowToast = jest.fn();
const mockLocalize = jest.fn((key: string) => key);

const mockAgent: t.Agent = {
  id: 'test-agent-id',
  name: 'Test Agent',
  description: 'This is a test agent for unit testing',
  avatar: {
    filepath: '/path/to/avatar.png',
    source: 'local' as const,
  },
  model: 'gpt-4',
  provider: 'openai',
  instructions: 'You are a helpful test agent',
  tools: [],
  code_interpreter: false,
  file_search: false,
  author: 'test-user-id',
  author_name: 'Test User',
  createdAt: new Date().toISOString(),
  updatedAt: new Date().toISOString(),
  version: 1,
  support_contact: {
    name: 'Support Team',
    email: 'support@test.com',
  },
};

// Helper function to render with providers
const renderWithProviders = (ui: React.ReactElement, options = {}) => {
  const queryClient = new QueryClient({
    defaultOptions: {
      queries: { retry: false },
      mutations: { retry: false },
    },
  });

  const Wrapper = ({ children }: { children: React.ReactNode }) => (
    <QueryClientProvider client={queryClient}>
      <RecoilRoot>
        <MemoryRouter>{children}</MemoryRouter>
      </RecoilRoot>
    </QueryClientProvider>
  );

  return render(ui, { wrapper: Wrapper, ...options });
};

describe('AgentDetail', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    (useNavigate as jest.Mock).mockReturnValue(mockNavigate);
    (useToast as jest.Mock).mockReturnValue({ showToast: mockShowToast });
    (useLocalize as jest.Mock).mockReturnValue(mockLocalize);

    // Reset clipboard mock
    (navigator.clipboard.writeText as jest.Mock).mockResolvedValue(undefined);
  });

  const defaultProps = {
    agent: mockAgent,
    isOpen: true,
    onClose: jest.fn(),
  };

  describe('Rendering', () => {
    it('should render agent details correctly', () => {
      renderWithProviders(<AgentDetail {...defaultProps} />);

      expect(screen.getByText('Test Agent')).toBeInTheDocument();
      expect(screen.getByText('This is a test agent for unit testing')).toBeInTheDocument();
      expect(screen.getByTestId('agent-avatar')).toBeInTheDocument();
      expect(screen.getByTestId('agent-avatar')).toHaveAttribute('data-size', 'xl');
    });

    it('should render contact information when available', () => {
      renderWithProviders(<AgentDetail {...defaultProps} />);

      expect(screen.getByText('com_agents_contact:')).toBeInTheDocument();
      expect(screen.getByRole('link', { name: 'Support Team' })).toBeInTheDocument();
      expect(screen.getByRole('link', { name: 'Support Team' })).toHaveAttribute(
        'href',
        'mailto:support@test.com',
      );
    });

    it('should not render contact information when not available', () => {
      const agentWithoutContact = { ...mockAgent };
      delete (agentWithoutContact as any).support_contact;

      renderWithProviders(<AgentDetail {...defaultProps} agent={agentWithoutContact} />);

      expect(screen.queryByText('com_agents_contact:')).not.toBeInTheDocument();
    });

    it('should render loading state when agent is null', () => {
      renderWithProviders(<AgentDetail {...defaultProps} agent={null as any} />);

      expect(screen.getByText('com_agents_loading')).toBeInTheDocument();
      expect(screen.getByText('com_agents_no_description')).toBeInTheDocument();
    });

    it('should render 3-dot menu button', () => {
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const menuButton = screen.getByRole('button', { name: 'More options' });
      expect(menuButton).toBeInTheDocument();
      expect(menuButton).toHaveAttribute('aria-haspopup', 'menu');
    });

    it('should render Start Chat button', () => {
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const startChatButton = screen.getByRole('button', { name: 'com_agents_start_chat' });
      expect(startChatButton).toBeInTheDocument();
      expect(startChatButton).not.toBeDisabled();
    });
  });

  describe('Interactions', () => {
    it('should navigate to chat when Start Chat button is clicked', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const startChatButton = screen.getByRole('button', { name: 'com_agents_start_chat' });
      await user.click(startChatButton);

      expect(mockNavigate).toHaveBeenCalledWith('/c/new?agent_id=test-agent-id');
    });

    it('should not navigate when agent is null', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} agent={null as any} />);

      const startChatButton = screen.getByRole('button', { name: 'com_agents_start_chat' });
      expect(startChatButton).toBeDisabled();

      await user.click(startChatButton);
      expect(mockNavigate).not.toHaveBeenCalled();
    });

    it('should open dropdown when 3-dot menu is clicked', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const menuButton = screen.getByRole('button', { name: 'More options' });
      await user.click(menuButton);

      expect(screen.getByRole('button', { name: 'com_agents_copy_link' })).toBeInTheDocument();
    });

    it('should close dropdown when clicking outside', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      // Open dropdown
      const menuButton = screen.getByRole('button', { name: 'More options' });
      await user.click(menuButton);

      expect(screen.getByRole('button', { name: 'com_agents_copy_link' })).toBeInTheDocument();

      // Click outside (on the agent name)
      const agentName = screen.getByText('Test Agent');
      await user.click(agentName);

      await waitFor(() => {
        expect(
          screen.queryByRole('button', { name: 'com_agents_copy_link' }),
        ).not.toBeInTheDocument();
      });
    });

    it('should copy link and show success toast when Copy Link is clicked', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      // Open dropdown
      const menuButton = screen.getByRole('button', { name: 'More options' });
      await user.click(menuButton);

      // Click copy link
      const copyLinkButton = screen.getByRole('button', { name: 'com_agents_copy_link' });
      await user.click(copyLinkButton);

      expect(navigator.clipboard.writeText).toHaveBeenCalledWith(
        `${window.location.origin}/c/new?agent_id=test-agent-id`,
      );
      expect(mockShowToast).toHaveBeenCalledWith({
        message: 'Link copied',
      });

      // Dropdown should close
      await waitFor(() => {
        expect(
          screen.queryByRole('button', { name: 'com_agents_copy_link' }),
        ).not.toBeInTheDocument();
      });
    });

    it('should show error toast when clipboard write fails', async () => {
      const user = userEvent.setup();
      (navigator.clipboard.writeText as jest.Mock).mockRejectedValue(new Error('Clipboard error'));

      renderWithProviders(<AgentDetail {...defaultProps} />);

      // Open dropdown and click copy link
      const menuButton = screen.getByRole('button', { name: 'More options' });
      await user.click(menuButton);

      const copyLinkButton = screen.getByRole('button', { name: 'com_agents_copy_link' });
      await user.click(copyLinkButton);

      await waitFor(() => {
        expect(mockShowToast).toHaveBeenCalledWith({
          message: 'com_agents_link_copy_failed',
        });
      });
    });

    it('should call onClose when dialog is closed', () => {
      const mockOnClose = jest.fn();
      render(<AgentDetail {...defaultProps} onClose={mockOnClose} isOpen={false} />);

      // Since we're testing the onOpenChange callback, we need to trigger it
      // This would normally be done by the Dialog component when ESC is pressed or overlay is clicked
      // We'll test this by checking that onClose is properly passed to the Dialog
      expect(mockOnClose).toBeDefined();
    });
  });

  describe('Accessibility', () => {
    it('should have proper ARIA attributes', () => {
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const menuButton = screen.getByRole('button', { name: 'More options' });
      expect(menuButton).toHaveAttribute('aria-haspopup', 'menu');
      expect(menuButton).toHaveAttribute('aria-label', 'More options');
    });

    it('should support keyboard navigation for dropdown', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const menuButton = screen.getByRole('button', { name: 'More options' });

      // Focus and open with Enter key
      menuButton.focus();
      await user.keyboard('{Enter}');

      expect(screen.getByRole('button', { name: 'com_agents_copy_link' })).toBeInTheDocument();
    });

    it('should have proper focus management', async () => {
      const user = userEvent.setup();
      renderWithProviders(<AgentDetail {...defaultProps} />);

      const menuButton = screen.getByRole('button', { name: 'More options' });
      await user.click(menuButton);

      const copyLinkButton = screen.getByRole('button', { name: 'com_agents_copy_link' });
      expect(copyLinkButton).toHaveClass('focus:bg-surface-hover', 'focus:outline-none');
    });
  });

  describe('Edge Cases', () => {
    it('should handle agent with only email contact', () => {
      const agentWithEmailOnly = {
        ...mockAgent,
        support_contact: {
          email: 'support@test.com',
        },
      };

      renderWithProviders(<AgentDetail {...defaultProps} agent={agentWithEmailOnly} />);

      expect(screen.getByRole('link', { name: 'support@test.com' })).toBeInTheDocument();
    });

    it('should handle agent with only name contact', () => {
      const agentWithNameOnly = {
        ...mockAgent,
        support_contact: {
          name: 'Support Team',
        },
      };

      renderWithProviders(<AgentDetail {...defaultProps} agent={agentWithNameOnly} />);

      expect(screen.getByText('Support Team')).toBeInTheDocument();
      expect(screen.queryByRole('link')).not.toBeInTheDocument();
    });

    it('should handle very long description with proper text wrapping', () => {
      const agentWithLongDescription = {
        ...mockAgent,
        description:
          'This is a very long description that should wrap properly and be displayed in multiple lines when the content exceeds the available width of the container.',
      };

      renderWithProviders(<AgentDetail {...defaultProps} agent={agentWithLongDescription} />);

      const description = screen.getByText(agentWithLongDescription.description);
      expect(description).toHaveClass('whitespace-pre-wrap');
    });

    it('should handle special characters in agent name', () => {
      const agentWithSpecialChars = {
        ...mockAgent,
        name: 'Test Agent™ & Co. (v2.0)',
      };

      renderWithProviders(<AgentDetail {...defaultProps} agent={agentWithSpecialChars} />);

      expect(screen.getByText('Test Agent™ & Co. (v2.0)')).toBeInTheDocument();
    });
  });
});