Glow Button

'use client';

import type { CSSProperties, ElementType, HTMLAttributes, ReactNode } from 'react';
import './GlowButton.css';

/**
 * GlowButton — A button with an animated glow effect that pulsates on hover.
 *
 * @param color - Optional. Glow color. Default '#6366f1'.
 */
export interface GlowButtonProps extends HTMLAttributes<HTMLElement> {
  href?: string;
  target?: string;
  rel?: string;
  type?: 'button' | 'submit' | 'reset';
  color?: string;
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
  children?: ReactNode;
}

export function GlowButton({
  href,
  type = 'button',
  color = '#6366f1',
  size = 'md',
  disabled = false,
  className,
  style,
  children,
  ...rest
}: GlowButtonProps) {
  const Tag: ElementType = href ? 'a' : 'button';
  return (
    <Tag
      {...rest}
      href={href}
      type={href ? undefined : type}
      disabled={href ? undefined : disabled}
      aria-disabled={href && disabled ? true : undefined}
      className={['glow-btn', `glow-btn--${size}`, className].filter(Boolean).join(' ')}
      style={{ '--btn-color': color, ...style } as CSSProperties}
    >
      <span className="glow-btn__content">{children}</span>
    </Tag>
  );
}

export default GlowButton;

/* GlowButton — ported from astro-component-kit (buttons/GlowButton.astro) */

.glow-btn {
  --glow-color: var(--btn-color);
  --glow-opacity: 0.4;
  
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans, inherit);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #fff;
  background: var(--btn-color);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  text-decoration: none;
  position: relative;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  white-space: nowrap;
  user-select: none;
  z-index: 1;
  
  /* Layered Glow */
  box-shadow: 
    0 0 10px color-mix(in srgb, var(--glow-color), transparent 60%),
    0 0 20px color-mix(in srgb, var(--glow-color), transparent 80%);
}

.glow-btn__content {
  position: relative;
  z-index: 2;
}

.glow-btn::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--btn-color);
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  filter: blur(8px);
  transition: opacity 0.3s ease;
}

.glow-btn::after {
  content: '';
  position: absolute;
  inset: -8px;
  background: var(--btn-color);
  border-radius: 14px;
  opacity: 0;
  filter: blur(25px);
  transition: opacity 0.4s ease;
  z-index: -2;
}

.glow-btn:hover:not(:disabled) {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 
    0 0 20px color-mix(in srgb, var(--glow-color), transparent 40%),
    0 0 40px color-mix(in srgb, var(--glow-color), transparent 70%);
}

.glow-btn:hover:not(:disabled)::before {
  opacity: 0.4;
}

.glow-btn:hover:not(:disabled)::after {
  opacity: 0.7;
  animation: glow-button-animate-glow 2.5s ease-in-out infinite;
}

.glow-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.98);
}

.glow-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
  box-shadow: none;
}

@keyframes glow-button-animate-glow {
  0%, 100% { opacity: 0.5; filter: blur(20px); transform: scale(1); }
  50% { opacity: 0.8; filter: blur(30px); transform: scale(1.1); }
}

/* Sizes */
.glow-btn--sm { padding: 0.5rem 1.4rem; font-size: 0.75rem; }
.glow-btn--md { padding: 0.8rem 2.2rem; font-size: 0.875rem; }
.glow-btn--lg { padding: 1.1rem 3rem; font-size: 1rem; }