import React, { useEffect, useState } from 'react'
import { createPortal } from 'react-dom'

/**
 * ShareToast — a minimal, auto-dismissing toast notification.
 *
 * Props:
 *   message   – text to display
 *   visible   – whether the toast is currently shown
 *   onHide    – callback when the toast finishes (auto-hidden after ~2 s)
 *   duration  – ms before auto-dismiss (default 2000)
 *   variant   – success or error tone (default success)
 */
export default function ShareToast({ message = 'Link copied!', visible = false, onHide, duration = 2000, variant = 'success' }) {
  const [show, setShow] = useState(false)
  const config = variant === 'error'
    ? {
        border: 'border-rose-300/25',
        background: 'bg-rose-950/90',
        text: 'text-rose-50',
        icon: 'text-rose-300',
        role: 'alert',
        live: 'assertive',
        iconPath: 'M12 9v3.75m0 3.75h.007v.008H12v-.008ZM10.29 3.86 1.82 18a1.875 1.875 0 0 0 1.606 2.813h16.148A1.875 1.875 0 0 0 21.18 18L12.71 3.86a1.875 1.875 0 0 0-3.42 0Z',
      }
    : {
        border: 'border-white/[0.10]',
        background: 'bg-nova-800/90',
        text: 'text-white',
        icon: 'text-emerald-400',
        role: 'status',
        live: 'polite',
        iconPath: 'M16.704 4.153a.75.75 0 0 1 .143 1.052l-8 10.5a.75.75 0 0 1-1.127.075l-4.5-4.5a.75.75 0 0 1 1.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 0 1 1.05-.143Z',
      }

  useEffect(() => {
    if (visible) {
      // Small delay so the enter transition plays
      const enterTimer = requestAnimationFrame(() => setShow(true))
      const hideTimer = setTimeout(() => {
        setShow(false)
        setTimeout(() => onHide?.(), 200) // let exit transition finish
      }, duration)

      return () => {
        cancelAnimationFrame(enterTimer)
        clearTimeout(hideTimer)
      }
    } else {
      setShow(false)
    }
  }, [visible, duration, onHide])

  if (!visible) return null

  return createPortal(
    <div
      role={config.role}
      aria-live={config.live}
      className={[
        'fixed bottom-24 left-1/2 z-[10001] -translate-x-1/2 rounded-full border px-5 py-2.5 text-sm font-medium shadow-xl backdrop-blur-md transition-all duration-200',
        config.border,
        config.background,
        config.text,
        show ? 'translate-y-0 opacity-100' : 'translate-y-3 opacity-0',
      ].join(' ')}
    >
      <span className="flex items-center gap-2">
        <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" className={`h-4 w-4 ${config.icon}`}>
          <path fillRule="evenodd" d={config.iconPath} clipRule="evenodd" />
        </svg>
        {message}
      </span>
    </div>,
    document.body,
  )
}
