"use client";

import React, { useEffect, useState, useRef } from "react";
import { Share2, Copy, Check } from "lucide-react";
import { useAnalytics } from "./analytics/useAnalytics";
import { motion, AnimatePresence } from "framer-motion";

export function TextSelectionShare() {
  const [isVisible, setIsVisible] = useState(false);
  const [position, setPosition] = useState({ x: 0, y: 0 });
  const [selectedText, setSelectedText] = useState("");
  const [copied, setCopied] = useState(false);
  const menuRef = useRef<HTMLDivElement>(null);
  const { trackEvent } = useAnalytics();
  const selectionTimeoutRef = useRef<NodeJS.Timeout>(undefined);

  useEffect(() => {
    const handleSelection = () => {
      // Clear any pending timeout
      if (selectionTimeoutRef.current) {
        clearTimeout(selectionTimeoutRef.current);
      }

      // Small delay to ensure selection is complete
      selectionTimeoutRef.current = setTimeout(() => {
        const selection = window.getSelection();
        const text = selection?.toString().trim();

        if (text && text.length > 10) {
          const range = selection?.getRangeAt(0);
          const rect = range?.getBoundingClientRect();

          if (rect) {
            // Position menu above selection, centered
            setPosition({
              x: rect.left + rect.width / 2,
              y: rect.top + window.scrollY - 10,
            });
            setSelectedText(text);
            setIsVisible(true);
          }
        } else {
          setIsVisible(false);
          setCopied(false);
        }
      }, 100);
    };

    const handleClickOutside = (e: MouseEvent) => {
      if (menuRef.current && !menuRef.current.contains(e.target as Node)) {
        const selection = window.getSelection();
        if (!selection?.toString()) {
          setIsVisible(false);
          setCopied(false);
        }
      }
    };

    // Listen to both mouseup and selectionchange for better reliability
    document.addEventListener("mouseup", handleSelection);
    document.addEventListener("selectionchange", handleSelection);
    document.addEventListener("mousedown", handleClickOutside);

    return () => {
      document.removeEventListener("mouseup", handleSelection);
      document.removeEventListener("selectionchange", handleSelection);
      document.removeEventListener("mousedown", handleClickOutside);
      if (selectionTimeoutRef.current) {
        clearTimeout(selectionTimeoutRef.current);
      }
    };
  }, []);

  const handleCopy = async () => {
    const url = window.location.href;
    const shareText = `"${selectedText}"\n\n${url}`;

    try {
      await navigator.clipboard.writeText(shareText);
      setCopied(true);
      trackEvent("text_selection_copied", {
        text_length: selectedText.length,
        url: url,
      });
      setTimeout(() => {
        setIsVisible(false);
        setCopied(false);
      }, 1500);
    } catch (err) {
      console.error("Failed to copy:", err);
    }
  };

  const handleShareX = () => {
    const url = window.location.href;
    const text = encodeURIComponent(`"${selectedText}"\n\n`);
    const shareUrl = `https://twitter.com/intent/tweet?text=${text}&url=${encodeURIComponent(url)}`;

    window.open(shareUrl, "_blank", "width=550,height=420");
    trackEvent("text_selection_shared_x", {
      text_length: selectedText.length,
      url: url,
    });
    setIsVisible(false);
  };

  const handleShareLinkedIn = () => {
    const url = window.location.href;
    const shareUrl = `https://www.linkedin.com/sharing/share-offsite/?url=${encodeURIComponent(url)}`;

    window.open(shareUrl, "_blank", "width=550,height=420");
    trackEvent("text_selection_shared_linkedin", {
      text_length: selectedText.length,
      url: url,
    });
    setIsVisible(false);
  };

  return (
    <AnimatePresence>
      {isVisible && (
        <motion.div
          ref={menuRef}
          initial={{ opacity: 0, y: 10, scale: 0.9 }}
          animate={{ opacity: 1, y: 0, scale: 1 }}
          exit={{ opacity: 0, y: 10, scale: 0.9 }}
          transition={{ duration: 0.15, ease: "easeOut" }}
          className="fixed z-[200]"
          style={{
            left: `${position.x}px`,
            top: `${position.y}px`,
            transform: "translate(-50%, -100%)",
          }}
        >
          <div className="bg-slate-900 text-white rounded-xl shadow-2xl px-2 py-2 flex items-center gap-1">
            <button
              onClick={handleCopy}
              className="px-3 py-2 hover:bg-slate-800 rounded-lg transition-colors flex items-center gap-2 text-sm font-medium"
              title="Zitat kopieren"
            >
              {copied ? (
                <>
                  <Check size={16} className="text-green-400" />
                  <span>Kopiert!</span>
                </>
              ) : (
                <>
                  <Copy size={16} />
                  <span>Kopieren</span>
                </>
              )}
            </button>

            <div className="w-px h-6 bg-slate-700" />

            <button
              onClick={handleShareX}
              className="px-3 py-2 hover:bg-slate-800 rounded-lg transition-colors flex items-center gap-2 text-sm font-medium"
              title="Auf X teilen"
            >
              <svg className="w-4 h-4" viewBox="0 0 24 24" fill="currentColor">
                <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>
              <span>X</span>
            </button>

            <button
              onClick={handleShareLinkedIn}
              className="px-3 py-2 hover:bg-slate-800 rounded-lg transition-colors flex items-center gap-2 text-sm font-medium"
              title="Auf LinkedIn teilen"
            >
              <svg className="w-4 h-4" viewBox="0 0 24 24" fill="currentColor">
                <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>
              <span>LinkedIn</span>
            </button>
          </div>
          {/* Arrow */}
          <div className="absolute left-1/2 -translate-x-1/2 -bottom-2 w-0 h-0 border-l-8 border-r-8 border-t-8 border-l-transparent border-r-transparent border-t-slate-900" />
        </motion.div>
      )}
    </AnimatePresence>
  );
}
