import React from 'react';
import { render, screen, fireEvent } from '@testing-library/react';
import '@testing-library/jest-dom';
import AgentCard from '../AgentCard';
import type t from 'librechat-data-provider';

// Mock useLocalize hook
jest.mock('~/hooks/useLocalize', () => () => (key: string) => {
  const mockTranslations: Record<string, string> = {
    com_agents_created_by: 'Created by',
    com_agents_agent_card_label: '{{name}} agent. {{description}}',
    com_agents_category_general: 'General',
    com_agents_category_hr: 'Human Resources',
  };
  return mockTranslations[key] || key;
});

// Mock useAgentCategories hook
jest.mock('~/hooks', () => ({
  useLocalize: () => (key: string, values?: Record<string, string>) => {
    const mockTranslations: Record<string, string> = {
      com_agents_created_by: 'Created by',
      com_agents_agent_card_label: '{{name}} agent. {{description}}',
      com_agents_category_general: 'General',
      com_agents_category_hr: 'Human Resources',
    };
    let translation = mockTranslations[key] || key;

    // Replace placeholders with actual values
    if (values) {
      Object.entries(values).forEach(([placeholder, value]) => {
        translation = translation.replace(new RegExp(`{{${placeholder}}}`, 'g'), value);
      });
    }

    return translation;
  },
  useAgentCategories: () => ({
    categories: [
      { value: 'general', label: 'com_agents_category_general' },
      { value: 'hr', label: 'com_agents_category_hr' },
      { value: 'custom', label: 'Custom Category' }, // Non-localized custom category
    ],
  }),
}));

describe('AgentCard', () => {
  const mockAgent: t.Agent = {
    id: '1',
    name: 'Test Agent',
    description: 'A test agent for testing purposes',
    support_contact: {
      name: 'Test Support',
      email: 'test@example.com',
    },
    avatar: { filepath: '/test-avatar.png', source: 'local' },
    created_at: 1672531200000,
    instructions: 'Test instructions',
    provider: 'openai' as const,
    model: 'gpt-4',
    model_parameters: {
      temperature: 0.7,
      maxContextTokens: 4096,
      max_context_tokens: 4096,
      max_output_tokens: 1024,
      top_p: 1,
      frequency_penalty: 0,
      presence_penalty: 0,
    },
  };

  const mockOnClick = jest.fn();

  beforeEach(() => {
    mockOnClick.mockClear();
  });

  it('renders agent information correctly', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    expect(screen.getByText('Test Agent')).toBeInTheDocument();
    expect(screen.getByText('A test agent for testing purposes')).toBeInTheDocument();
    expect(screen.getByText('Test Support')).toBeInTheDocument();
  });

  it('displays avatar when provided as object', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const avatarImg = screen.getByAltText('Test Agent avatar');
    expect(avatarImg).toBeInTheDocument();
    expect(avatarImg).toHaveAttribute('src', '/test-avatar.png');
  });

  it('displays avatar when provided as string', () => {
    const agentWithStringAvatar = {
      ...mockAgent,
      avatar: '/string-avatar.png' as any, // Legacy support for string avatars
    };

    render(<AgentCard agent={agentWithStringAvatar} onClick={mockOnClick} />);

    const avatarImg = screen.getByAltText('Test Agent avatar');
    expect(avatarImg).toBeInTheDocument();
    expect(avatarImg).toHaveAttribute('src', '/string-avatar.png');
  });

  it('displays Feather icon fallback when no avatar is provided', () => {
    const agentWithoutAvatar = {
      ...mockAgent,
      avatar: undefined,
    };

    render(<AgentCard agent={agentWithoutAvatar as any as t.Agent} onClick={mockOnClick} />);

    // Check for Feather icon presence by looking for the svg with lucide-feather class
    const featherIcon = document.querySelector('.lucide-feather');
    expect(featherIcon).toBeInTheDocument();
  });

  it('calls onClick when card is clicked', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const card = screen.getByRole('button');
    fireEvent.click(card);

    expect(mockOnClick).toHaveBeenCalledTimes(1);
  });

  it('calls onClick when Enter key is pressed', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const card = screen.getByRole('button');
    fireEvent.keyDown(card, { key: 'Enter' });

    expect(mockOnClick).toHaveBeenCalledTimes(1);
  });

  it('calls onClick when Space key is pressed', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const card = screen.getByRole('button');
    fireEvent.keyDown(card, { key: ' ' });

    expect(mockOnClick).toHaveBeenCalledTimes(1);
  });

  it('does not call onClick for other keys', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const card = screen.getByRole('button');
    fireEvent.keyDown(card, { key: 'Escape' });

    expect(mockOnClick).not.toHaveBeenCalled();
  });

  it('applies additional className when provided', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} className="custom-class" />);

    const card = screen.getByRole('button');
    expect(card).toHaveClass('custom-class');
  });

  it('handles missing support contact gracefully', () => {
    const agentWithoutContact = {
      ...mockAgent,
      support_contact: undefined,
      authorName: undefined,
    };

    render(<AgentCard agent={agentWithoutContact} onClick={mockOnClick} />);

    expect(screen.getByText('Test Agent')).toBeInTheDocument();
    expect(screen.getByText('A test agent for testing purposes')).toBeInTheDocument();
    expect(screen.queryByText(/Created by/)).not.toBeInTheDocument();
  });

  it('displays authorName when support_contact is missing', () => {
    const agentWithAuthorName = {
      ...mockAgent,
      support_contact: undefined,
      authorName: 'John Doe',
    };

    render(<AgentCard agent={agentWithAuthorName} onClick={mockOnClick} />);

    expect(screen.getByText('John Doe')).toBeInTheDocument();
  });

  it('displays support_contact email when name is missing', () => {
    const agentWithEmailOnly = {
      ...mockAgent,
      support_contact: { email: 'contact@example.com' },
      authorName: undefined,
    };

    render(<AgentCard agent={agentWithEmailOnly} onClick={mockOnClick} />);

    expect(screen.getByText('contact@example.com')).toBeInTheDocument();
  });

  it('prioritizes support_contact name over authorName', () => {
    const agentWithBoth = {
      ...mockAgent,
      support_contact: { name: 'Support Team' },
      authorName: 'John Doe',
    };

    render(<AgentCard agent={agentWithBoth} onClick={mockOnClick} />);

    expect(screen.getByText('Support Team')).toBeInTheDocument();
    expect(screen.queryByText('John Doe')).not.toBeInTheDocument();
  });

  it('prioritizes name over email in support_contact', () => {
    const agentWithNameAndEmail = {
      ...mockAgent,
      support_contact: {
        name: 'Support Team',
        email: 'support@example.com',
      },
      authorName: undefined,
    };

    render(<AgentCard agent={agentWithNameAndEmail} onClick={mockOnClick} />);

    expect(screen.getByText('Support Team')).toBeInTheDocument();
    expect(screen.queryByText('support@example.com')).not.toBeInTheDocument();
  });

  it('has proper accessibility attributes', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    const card = screen.getByRole('button');
    expect(card).toHaveAttribute('tabIndex', '0');
    expect(card).toHaveAttribute(
      'aria-label',
      'Test Agent agent. A test agent for testing purposes',
    );
  });

  it('displays localized category label', () => {
    const agentWithCategory = {
      ...mockAgent,
      category: 'general',
    };

    render(<AgentCard agent={agentWithCategory} onClick={mockOnClick} />);

    expect(screen.getByText('General')).toBeInTheDocument();
  });

  it('displays custom category label', () => {
    const agentWithCustomCategory = {
      ...mockAgent,
      category: 'custom',
    };

    render(<AgentCard agent={agentWithCustomCategory} onClick={mockOnClick} />);

    expect(screen.getByText('Custom Category')).toBeInTheDocument();
  });

  it('displays capitalized fallback for unknown category', () => {
    const agentWithUnknownCategory = {
      ...mockAgent,
      category: 'unknown',
    };

    render(<AgentCard agent={agentWithUnknownCategory} onClick={mockOnClick} />);

    expect(screen.getByText('Unknown')).toBeInTheDocument();
  });

  it('does not display category tag when category is not provided', () => {
    render(<AgentCard agent={mockAgent} onClick={mockOnClick} />);

    expect(screen.queryByText('General')).not.toBeInTheDocument();
    expect(screen.queryByText('Unknown')).not.toBeInTheDocument();
  });
});