/**
 * =============================================================================
 * LAYOUT COMPONENT - Application Shell
 * =============================================================================
 *
 * Main layout wrapper with navigation and content area.
 *
 * INTERVIEW NOTES:
 * - Outlet from react-router renders nested route content
 * - Layout provides consistent navigation across pages
 * - Responsive design with mobile menu support
 */

import { Outlet, Link, useLocation } from 'react-router-dom';
import { useAppSelector, useAppDispatch } from '@/store';
import { selectResolvedTheme, setTheme } from '@/store/slices/uiSlice';

export default function Layout() {
  const location = useLocation();
  const dispatch = useAppDispatch();
  const theme = useAppSelector(selectResolvedTheme);

  const navItems = [
    { path: '/', label: 'Home' },
    { path: '/todos', label: 'Todos' },
    { path: '/mistral', label: 'Mistral SDK' },
  ];

  const toggleTheme = () => {
    dispatch(setTheme(theme === 'dark' ? 'light' : 'dark'));
  };

  return (
    <div className="min-h-screen flex flex-col">
      {/* Header */}
      <header className="sticky top-0 z-40 glass border-b border-gray-200 dark:border-gray-800">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <div className="flex items-center justify-between h-16">
            {/* Logo */}
            <Link to="/" className="flex items-center gap-2">
              <div className="w-8 h-8 rounded-lg bg-linear-to-br from-primary-500 to-primary-700 flex items-center justify-center">
                <span className="text-white font-bold text-sm">M</span>
              </div>
              <span className="font-semibold text-lg">Mistral Boilerplate</span>
            </Link>

            {/* Navigation */}
            <nav className="hidden md:flex items-center gap-6">
              {navItems.map((item) => (
                <Link
                  key={item.path}
                  to={item.path}
                  className={`
                    text-sm font-medium transition-colors
                    ${
                      location.pathname === item.path
                        ? 'text-primary-600 dark:text-primary-400'
                        : 'text-gray-600 hover:text-gray-900 dark:text-gray-400 dark:hover:text-gray-100'
                    }
                  `}
                >
                  {item.label}
                </Link>
              ))}
            </nav>

            {/* Actions */}
            <div className="flex items-center gap-4">
              {/* Theme toggle */}
              <button
                onClick={toggleTheme}
                className="p-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors"
                aria-label="Toggle theme"
              >
                {theme === 'dark' ? (
                  <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                    <path
                      fillRule="evenodd"
                      d="M10 2a1 1 0 011 1v1a1 1 0 11-2 0V3a1 1 0 011-1zm4 8a4 4 0 11-8 0 4 4 0 018 0zm-.464 4.95l.707.707a1 1 0 001.414-1.414l-.707-.707a1 1 0 00-1.414 1.414zm2.12-10.607a1 1 0 010 1.414l-.706.707a1 1 0 11-1.414-1.414l.707-.707a1 1 0 011.414 0zM17 11a1 1 0 100-2h-1a1 1 0 100 2h1zm-7 4a1 1 0 011 1v1a1 1 0 11-2 0v-1a1 1 0 011-1zM5.05 6.464A1 1 0 106.465 5.05l-.708-.707a1 1 0 00-1.414 1.414l.707.707zm1.414 8.486l-.707.707a1 1 0 01-1.414-1.414l.707-.707a1 1 0 011.414 1.414zM4 11a1 1 0 100-2H3a1 1 0 000 2h1z"
                      clipRule="evenodd"
                    />
                  </svg>
                ) : (
                  <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 20 20">
                    <path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z" />
                  </svg>
                )}
              </button>

              {/* GitHub link */}
              <a
                href="https://github.com"
                target="_blank"
                rel="noopener noreferrer"
                className="p-2 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors"
                aria-label="GitHub"
              >
                <svg className="w-5 h-5" fill="currentColor" viewBox="0 0 24 24">
                  <path d="M12 0c-6.626 0-12 5.373-12 12 0 5.302 3.438 9.8 8.207 11.387.599.111.793-.261.793-.577v-2.234c-3.338.726-4.033-1.416-4.033-1.416-.546-1.387-1.333-1.756-1.333-1.756-1.089-.745.083-.729.083-.729 1.205.084 1.839 1.237 1.839 1.237 1.07 1.834 2.807 1.304 3.492.997.107-.775.418-1.305.762-1.604-2.665-.305-5.467-1.334-5.467-5.931 0-1.311.469-2.381 1.236-3.221-.124-.303-.535-1.524.117-3.176 0 0 1.008-.322 3.301 1.23.957-.266 1.983-.399 3.003-.404 1.02.005 2.047.138 3.006.404 2.291-1.552 3.297-1.23 3.297-1.23.653 1.653.242 2.874.118 3.176.77.84 1.235 1.911 1.235 3.221 0 4.609-2.807 5.624-5.479 5.921.43.372.823 1.102.823 2.222v3.293c0 .319.192.694.801.576 4.765-1.589 8.199-6.086 8.199-11.386 0-6.627-5.373-12-12-12z" />
                </svg>
              </a>
            </div>
          </div>
        </div>
      </header>

      {/* Main content */}
      <main className="flex-1">
        <Outlet />
      </main>

      {/* Footer */}
      <footer className="border-t border-gray-200 dark:border-gray-800 py-6">
        <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
          <p className="text-center text-sm text-gray-500 dark:text-gray-400">
            Mistral React Boilerplate - Built for your interview
          </p>
        </div>
      </footer>
    </div>
  );
}