/* global React */
/* BoldBrandz — Theme Toggle Button
 * Loaded after 00-theme-context.jsx.
 * Exposes window.ThemeToggle
 * Renders Sun when dark (click → light) / Moon when light (click → dark)
 */
(function(){

const { useState } = React;

function ThemeToggle() {
  const { theme, toggleTheme } = window.useTheme();
  const [hover, setHover] = useState(false);
  const isDark = theme === 'dark';

  return (
    <button
      type="button"
      onClick={toggleTheme}
      aria-label={isDark ? 'Switch to light theme' : 'Switch to dark theme'}
      aria-pressed={!isDark}
      onMouseEnter={() => setHover(true)}
      onMouseLeave={() => setHover(false)}
      style={{
        background: 'transparent',
        border: 'none',
        cursor: 'pointer',
        padding: 0,
        display: 'inline-flex',
        alignItems: 'center',
        justifyContent: 'center',
        color: hover ? 'var(--text-primary)' : 'var(--text-dim)',
        transition: 'color 150ms',
        width: 20,
        height: 20,
        flexShrink: 0,
      }}
    >
      {isDark ? (
        <svg viewBox="0 0 24 24" width={16} height={16} fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
          <circle cx="12" cy="12" r="5"/>
          <line x1="12" y1="1" x2="12" y2="3"/>
          <line x1="12" y1="21" x2="12" y2="23"/>
          <line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/>
          <line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/>
          <line x1="1" y1="12" x2="3" y2="12"/>
          <line x1="21" y1="12" x2="23" y2="12"/>
          <line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/>
          <line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/>
        </svg>
      ) : (
        <svg viewBox="0 0 24 24" width={16} height={16} fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round">
          <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z"/>
        </svg>
      )}
    </button>
  );
}

window.ThemeToggle = ThemeToggle;

})();