import React from 'react';
import { useTheme } from '../context/ThemeContext';

function ThemeToggle() {
  const { theme, toggleTheme } = useTheme();

  const getTitle = () => {
    if (theme === 'light') return 'Switch to dark mode';
    if (theme === 'dark') return 'Switch to system mode';
    return 'Switch to light mode';
  };

  return (
    <button
      onClick={toggleTheme}
      className="p-2 rounded-lg hover:bg-indigo-700 dark:hover:bg-indigo-900 transition-colors relative"
      aria-label="Toggle theme"
      title={getTitle()}
    >
      {theme === 'light' ? (
        // Sun icon - currently light mode
        <svg xmlns="http://www.w3.org/2000/svg" className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
          <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>
      ) : theme === 'dark' ? (
        // Moon icon - currently dark mode
        <svg xmlns="http://www.w3.org/2000/svg" className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
          <path d="M17.293 13.293A8 8 0 016.707 2.707a8.001 8.001 0 1010.586 10.586z" />
        </svg>
      ) : (
        // Computer/System icon - currently system mode
        <svg xmlns="http://www.w3.org/2000/svg" className="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
          <path fillRule="evenodd" d="M3 5a2 2 0 012-2h10a2 2 0 012 2v8a2 2 0 01-2 2h-2.22l.123.489.804.804A1 1 0 0113 18H7a1 1 0 01-.707-1.707l.804-.804L7.22 15H5a2 2 0 01-2-2V5zm5.771 7H5V5h10v7H8.771z" clipRule="evenodd" />
        </svg>
      )}
    </button>
  );
}

export default ThemeToggle;

