import React from 'react';
import { describe, it, expect } from 'vitest';
import { render, screen } from '@testing-library/react';
import { AuthShell } from './AuthShell';

describe('AuthShell', () => {
  describe('rendering', () => {
    it('should render with single child', () => {
      render(
        <AuthShell>
          <div data-testid="child-content">Child content</div>
        </AuthShell>
      );

      expect(screen.getByTestId('child-content')).toBeInTheDocument();
    });

    it('should render with multiple children', () => {
      render(
        <AuthShell>
          <div data-testid="child-1">Child 1</div>
          <div data-testid="child-2">Child 2</div>
          <div data-testid="child-3">Child 3</div>
        </AuthShell>
      );

      expect(screen.getByTestId('child-1')).toBeInTheDocument();
      expect(screen.getByTestId('child-2')).toBeInTheDocument();
      expect(screen.getByTestId('child-3')).toBeInTheDocument();
    });

    it('should render with complex children', () => {
      render(
        <AuthShell>
          <div>
            <h1>Authentication</h1>
            <p>Please sign in to continue</p>
            <form>
              <input type="email" placeholder="Email" />
              <input type="password" placeholder="Password" />
              <button type="submit">Sign In</button>
            </form>
          </div>
        </AuthShell>
      );

      expect(screen.getByText('Authentication')).toBeInTheDocument();
      expect(screen.getByText('Please sign in to continue')).toBeInTheDocument();
      expect(screen.getByPlaceholderText('Email')).toBeInTheDocument();
      expect(screen.getByPlaceholderText('Password')).toBeInTheDocument();
      expect(screen.getByText('Sign In')).toBeInTheDocument();
    });

    it('should render with nested components', () => {
      render(
        <AuthShell>
          <div data-testid="outer">
            <div data-testid="inner">
              <div data-testid="inner-inner">Content</div>
            </div>
          </div>
        </AuthShell>
      );

      expect(screen.getByTestId('outer')).toBeInTheDocument();
      expect(screen.getByTestId('inner')).toBeInTheDocument();
      expect(screen.getByTestId('inner-inner')).toBeInTheDocument();
    });
  });

  describe('accessibility', () => {
    it('should have proper semantic structure', () => {
      render(
        <AuthShell>
          <div>Content</div>
        </AuthShell>
      );

      // The component uses AuthLayout which should have proper semantics
      expect(screen.getByText('Content')).toBeInTheDocument();
    });

    it('should maintain proper document structure', () => {
      render(
        <AuthShell>
          <main>
            <h1>Authentication</h1>
            <p>Content</p>
          </main>
        </AuthShell>
      );

      expect(screen.getByText('Authentication')).toBeInTheDocument();
      expect(screen.getByText('Content')).toBeInTheDocument();
    });
  });

  describe('edge cases', () => {
    it('should handle empty children', () => {
      render(<AuthShell>{null}</AuthShell>);
      // Component should render without errors
    });

    it('should handle undefined children', () => {
      render(<AuthShell>{undefined}</AuthShell>);
      // Component should render without errors
    });

    it('should handle empty string children', () => {
      render(<AuthShell>{''}</AuthShell>);
      // Component should render without errors
    });

    it('should handle text nodes', () => {
      render(<AuthShell>Text content</AuthShell>);
      expect(screen.getByText('Text content')).toBeInTheDocument();
    });

    it('should handle multiple text nodes', () => {
      render(
        <AuthShell>
          Text 1
          Text 2
          Text 3
        </AuthShell>
      );

      expect(screen.getByText('Text 1')).toBeInTheDocument();
      expect(screen.getByText('Text 2')).toBeInTheDocument();
      expect(screen.getByText('Text 3')).toBeInTheDocument();
    });

    it('should handle mixed content types', () => {
      render(
        <AuthShell>
          Text node
          <div>Div content</div>
          <span>Span content</span>
        </AuthShell>
      );

      expect(screen.getByText('Text node')).toBeInTheDocument();
      expect(screen.getByText('Div content')).toBeInTheDocument();
      expect(screen.getByText('Span content')).toBeInTheDocument();
    });
  });

  describe('visual states', () => {
    it('should maintain layout structure', () => {
      render(
        <AuthShell>
          <div data-testid="content">Content</div>
        </AuthShell>
      );

      // The component uses AuthLayout which provides the layout structure
      expect(screen.getByTestId('content')).toBeInTheDocument();
    });

    it('should handle full authentication flow', () => {
      render(
        <AuthShell>
          <div>
            <h1>Sign In</h1>
            <form>
              <input type="email" placeholder="Email" />
              <input type="password" placeholder="Password" />
              <button type="submit">Sign In</button>
            </form>
            <div>
              <a href="/forgot-password">Forgot password?</a>
              <a href="/register">Create account</a>
            </div>
          </div>
        </AuthShell>
      );

      expect(screen.getByText('Sign In')).toBeInTheDocument();
      expect(screen.getByPlaceholderText('Email')).toBeInTheDocument();
      expect(screen.getByPlaceholderText('Password')).toBeInTheDocument();
      expect(screen.getByText('Sign In')).toBeInTheDocument();
      expect(screen.getByText('Forgot password?')).toBeInTheDocument();
      expect(screen.getByText('Create account')).toBeInTheDocument();
    });
  });
});