'use client'

import { Share2, Link2, Check } from 'lucide-react'
import { useState } from 'react'
import { siteConfig } from '@/lib/site-config'

interface SocialShareProps {
  title: string
  description: string
  url: string
  image?: string
}

function FacebookIcon({ className }: { className?: string }) {
  return (
    <svg className={className} viewBox="0 0 24 24" fill="currentColor" aria-hidden="true">
      <path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z" />
    </svg>
  )
}

function LinkedInIcon({ className }: { className?: string }) {
  return (
    <svg className={className} viewBox="0 0 24 24" fill="currentColor" aria-hidden="true">
      <path d="M20.447 20.452h-3.554v-5.569c0-1.328-.027-3.037-1.852-3.037-1.853 0-2.136 1.445-2.136 2.939v5.667H9.351V9h3.414v1.561h.046c.477-.9 1.637-1.85 3.37-1.85 3.601 0 4.267 2.37 4.267 5.455v6.286zM5.337 7.433c-1.144 0-2.063-.926-2.063-2.065 0-1.138.92-2.063 2.063-2.063 1.14 0 2.064.925 2.064 2.063 0 1.139-.925 2.065-2.064 2.065zm1.782 13.019H3.555V9h3.564v11.452zM22.225 0H1.771C.792 0 0 .774 0 1.729v20.542C0 23.227.792 24 1.771 24h20.451C23.2 24 24 23.227 24 22.271V1.729C24 .774 23.2 0 22.222 0h.003z" />
    </svg>
  )
}

function XIcon({ className }: { className?: string }) {
  return (
    <svg className={className} viewBox="0 0 24 24" fill="currentColor" aria-hidden="true">
      <path d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z" />
    </svg>
  )
}

export function SocialShare({ title, description, url, image }: SocialShareProps) {
  const [copied, setCopied] = useState(false)
  const fullUrl = typeof window !== 'undefined' ? `${window.location.origin}${url}` : `${siteConfig.website}${url}`
  const encodedUrl = encodeURIComponent(fullUrl)
  const encodedTitle = encodeURIComponent(title)

  const shareLinks = [
    { name: 'Facebook', icon: FacebookIcon, href: `https://www.facebook.com/sharer/sharer.php?u=${encodedUrl}`, color: 'hover:bg-[#1877F2] hover:text-white' },
    { name: 'LinkedIn', icon: LinkedInIcon, href: `https://www.linkedin.com/sharing/share-offsite/?url=${encodedUrl}`, color: 'hover:bg-[#0A66C2] hover:text-white' },
    { name: 'X', icon: XIcon, href: `https://twitter.com/intent/tweet?url=${encodedUrl}&text=${encodedTitle}`, color: 'hover:bg-black hover:text-white' },
  ]

  async function copyLink() {
    await navigator.clipboard.writeText(fullUrl)
    setCopied(true)
    setTimeout(() => setCopied(false), 2000)
  }

  async function nativeShare() {
    if (navigator.share) {
      await navigator.share({ title, text: description, url: fullUrl })
    }
  }

  return (
    <div className="space-y-3 p-5 rounded-xl border border-border/50 bg-muted/20">
      <div className="flex items-center gap-2">
        <Share2 className="w-4 h-4 text-primary" />
        <p className="text-sm font-semibold text-foreground">Share this course</p>
      </div>
      <div className="flex flex-wrap gap-2">
        {shareLinks.map(({ name, icon: Icon, href, color }) => (
          <a
            key={name}
            href={href}
            target="_blank"
            rel="noopener noreferrer"
            className={`inline-flex items-center gap-2 px-4 py-2 rounded-lg border border-border text-sm font-medium transition-colors ${color}`}
            aria-label={`Share on ${name}`}
          >
            <Icon className="w-4 h-4" />
            {name}
          </a>
        ))}
        <button
          onClick={copyLink}
          className="inline-flex items-center gap-2 px-4 py-2 rounded-lg border border-border text-sm font-medium hover:bg-muted transition-colors"
        >
          {copied ? <Check className="w-4 h-4 text-green-600" /> : <Link2 className="w-4 h-4" />}
          {copied ? 'Copied!' : 'Copy Link'}
        </button>
        {typeof navigator !== 'undefined' && 'share' in navigator && (
          <button
            onClick={nativeShare}
            className="inline-flex items-center gap-2 px-4 py-2 rounded-lg border border-border text-sm font-medium hover:bg-muted transition-colors"
          >
            <Share2 className="w-4 h-4" /> Share
          </button>
        )}
      </div>
      {image && (
        <p className="text-xs text-muted-foreground">
          Course image preview included when sharing on Facebook, LinkedIn, and X.
        </p>
      )}
    </div>
  )
}