import { SiFacebook, SiLinkedin, SiX, SiWhatsapp, SiTelegram, SiPinterest } from "react-icons/si";
import { Mail, Link2, Check } from "lucide-react";
import { useState } from "react";

interface ShareButtonsProps {
  url: string;
  title: string;
  image?: string;
}

const CANONICAL_DOMAIN = "https://www.folx.tv";

function canonicalUrl(url: string): string {
  try {
    const parsed = new URL(url);
    return `${CANONICAL_DOMAIN}${parsed.pathname}${parsed.search}${parsed.hash}`;
  } catch {
    return url;
  }
}

function openPopup(shareUrl: string) {
  const w = 600;
  const h = 500;
  const left = window.screenX + (window.outerWidth - w) / 2;
  const top = window.screenY + (window.outerHeight - h) / 2;
  window.open(shareUrl, "share", `width=${w},height=${h},left=${left},top=${top},toolbar=no,menubar=no,scrollbars=yes`);
}

interface ShareTarget {
  name: string;
  icon: typeof SiFacebook;
  color: string;
  getUrl: (url: string, title: string, image?: string) => string;
  popup?: boolean;
}

const SHARE_TARGETS: ShareTarget[] = [
  {
    name: "Facebook",
    icon: SiFacebook,
    color: "hover:bg-[#1877F2] hover:text-white",
    getUrl: (url: string) => `https://www.facebook.com/sharer.php?u=${encodeURIComponent(url)}`,
    popup: true,
  },
  {
    name: "X",
    icon: SiX,
    color: "hover:bg-[#000] hover:text-white",
    getUrl: (url: string, title: string) => `https://x.com/intent/tweet?url=${encodeURIComponent(url)}&text=${encodeURIComponent(title)}`,
    popup: true,
  },
  {
    name: "LinkedIn",
    icon: SiLinkedin,
    color: "hover:bg-[#0A66C2] hover:text-white",
    getUrl: (url: string) => `https://www.linkedin.com/sharing/share-offsite/?url=${encodeURIComponent(url)}`,
    popup: true,
  },
  {
    name: "WhatsApp",
    icon: SiWhatsapp,
    color: "hover:bg-[#25D366] hover:text-white",
    getUrl: (url: string, title: string) => `https://wa.me/?text=${encodeURIComponent(title + " " + url)}`,
  },
  {
    name: "Telegram",
    icon: SiTelegram,
    color: "hover:bg-[#26A5E4] hover:text-white",
    getUrl: (url: string, title: string) => `https://t.me/share/url?url=${encodeURIComponent(url)}&text=${encodeURIComponent(title)}`,
  },
  {
    name: "Pinterest",
    icon: SiPinterest,
    color: "hover:bg-[#BD081C] hover:text-white",
    getUrl: (url: string, title: string, image?: string) => `https://pinterest.com/pin/create/button/?url=${encodeURIComponent(url)}&description=${encodeURIComponent(title)}${image ? "&media=" + encodeURIComponent(image) : ""}`,
    popup: true,
  },
  {
    name: "E-Mail",
    icon: Mail,
    color: "hover:bg-muted-foreground hover:text-white",
    getUrl: (url: string, title: string) => `mailto:?subject=${encodeURIComponent(title)}&body=${encodeURIComponent(title + "\n\n" + url)}`,
  },
];

export default function ShareButtons({ url, title, image }: ShareButtonsProps) {
  const [copied, setCopied] = useState(false);

  const handleCopy = async () => {
    try {
      await navigator.clipboard.writeText(canonicalUrl(url));
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {
      const input = document.createElement("input");
      input.value = canonicalUrl(url);
      document.body.appendChild(input);
      input.select();
      document.execCommand("copy");
      document.body.removeChild(input);
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    }
  };

  const handleShare = (target: ShareTarget, e: React.MouseEvent) => {
    const shareUrl = target.getUrl(canonicalUrl(url), title, image ? canonicalUrl(image) : undefined);
    if (target.popup) {
      e.preventDefault();
      openPopup(shareUrl);
    }
  };

  return (
    <div className="flex flex-wrap items-center gap-2" data-testid="share-buttons">
      <span className="text-sm text-muted-foreground mr-1">Teilen:</span>
      {SHARE_TARGETS.map((target) => (
        <a
          key={target.name}
          href={target.getUrl(canonicalUrl(url), title, image ? canonicalUrl(image) : undefined)}
          target="_blank"
          rel="noopener noreferrer"
          onClick={(e) => handleShare(target, e)}
          className={`inline-flex items-center justify-center w-9 h-9 rounded-full border border-border text-muted-foreground transition-all duration-200 ${target.color}`}
          aria-label={`Auf ${target.name} teilen`}
          data-testid={`button-share-${target.name.toLowerCase()}`}
        >
          <target.icon className="w-4 h-4" />
        </a>
      ))}
      <button
        onClick={handleCopy}
        className={`inline-flex items-center justify-center w-9 h-9 rounded-full border border-border transition-all duration-200 ${copied ? "bg-green-600 text-white border-green-600" : "text-muted-foreground hover:bg-muted-foreground hover:text-white"}`}
        aria-label="Link kopieren"
        data-testid="button-share-copy"
      >
        {copied ? <Check className="w-4 h-4" /> : <Link2 className="w-4 h-4" />}
      </button>
    </div>
  );
}