Shimmer Button

'use client';

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

/**
 * ShimmerButton — A clean, elegant button with a continuous diagonal shimmer sweeping animation.
 */
export interface ShimmerButtonProps extends HTMLAttributes<HTMLElement> {
  href?: string;
  target?: string;
  rel?: string;
  type?: 'button' | 'submit' | 'reset';
  variant?: 'primary' | 'secondary' | 'ghost';
  size?: 'sm' | 'md' | 'lg';
  disabled?: boolean;
  children?: ReactNode;
}

export function ShimmerButton({
  href,
  type = 'button',
  variant = 'primary',
  size = 'md',
  disabled = false,
  className,
  children,
  ...rest
}: ShimmerButtonProps) {
  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={['shimmer-btn', `shimmer-btn--${variant}`, `shimmer-btn--${size}`, className].filter(Boolean).join(' ')}
    >
      <span className="shimmer-btn__content">{children}</span>
    </Tag>
  );
}

export default ShimmerButton;

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

.shimmer-btn {
  --shimmer-speed: 3s;
  --shimmer-color: rgba(255, 255, 255, 0.3);
  
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: none;
  border-radius: var(--r-full, 9999px);
  cursor: pointer;
  text-decoration: none;
  overflow: hidden;
  transition: all 0.3s ease;
  user-select: none;
  font-family: var(--font-sans, inherit);
  font-weight: 600;
  white-space: nowrap;
}

.shimmer-btn__content {
  display: block;
  padding: 0.75rem 1.8rem;
  z-index: 2;
}

.shimmer-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg, 
    transparent 30%, 
    var(--shimmer-color) 50%, 
    transparent 70%
  );
  background-size: 200% 100%;
  transform: translateX(-100%);
  animation: shimmer-button-sweep var(--shimmer-speed) infinite;
  z-index: 1;
}

@keyframes shimmer-button-sweep {
  0% { transform: translateX(-100%); }
  40%, 100% { transform: translateX(100%); }
}

.shimmer-btn:hover:not(:disabled) {
  transform: scale(1.02);
}

.shimmer-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  filter: grayscale(1);
}

/* Variants */
.shimmer-btn--primary {
  background: var(--c-bg-2, #1e293b);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.shimmer-btn--secondary {
  background: var(--c-primary, #6366f1);
  color: #fff;
}

.shimmer-btn--ghost {
  background: transparent;
  color: var(--c-primary-light, #818cf8);
  border: 1px solid rgba(99, 102, 241, 0.4);
  --shimmer-color: rgba(99, 102, 241, 0.2);
}

/* Sizes */
.shimmer-btn--sm .shimmer-btn__content { padding: 0.45rem 1.2rem; font-size: 0.8rem; }
.shimmer-btn--md .shimmer-btn__content { padding: 0.75rem 1.8rem; font-size: 0.95rem; }
.shimmer-btn--lg .shimmer-btn__content { padding: 1.1rem 2.6rem; font-size: 1.1rem; }