"use client";

import { useState, useEffect } from "react";
import { motion, AnimatePresence } from "framer-motion";
import { Activity } from "lucide-react";
import Image from "next/image";

const MONITORS = [
  { id: 2, name: "Datasaur" },
  { id: 6, name: "Audiobookshelf" },
  { id: 7, name: "Woodpecker CI" },
  { id: 8, name: "Forgejo Git" },
  { id: 9, name: "Server dashboard" },
  { id: 10, name: "Ratoong" },
  { id: 3, name: "Dozzle" },
  { id: 12, name: "Observatory" },
  { id: 13, name: "Surf hub" },
  { id: 11, name: "Anime list" },
  { id: 5, name: "Wiki" },
  { id: 4, name: "Watchtower" },
];

const ITEMS_PER_PAGE = 6;
const INTERVAL_TIME = 2500;

export default function MonitorCard({ isHovered }: { isHovered: boolean }) {
  const [page, setPage] = useState(0);
  const totalPages = Math.ceil(MONITORS.length / ITEMS_PER_PAGE);

  useEffect(() => {
    let interval: NodeJS.Timeout;

    if (isHovered) {
      // Start rotating pages only when hovered
      interval = setInterval(() => {
        setPage((p) => (p + 1) % totalPages);
      }, INTERVAL_TIME);
    } else {
      // Defer state reset to avoid "cascading render" error
      // and allow the fade-out animation to play smoothly
      const timeout = setTimeout(() => {
        setPage(0);
      }, 300);
      return () => clearTimeout(timeout);
    }

    return () => {
      if (interval) clearInterval(interval);
    };
  }, [isHovered, totalPages]);

  return (
    <div className="relative w-full h-full min-h-[180px] flex flex-col justify-center">
      {/* --- DEFAULT VIEW --- */}
      <div
        className={`transition-opacity duration-300 ${
          isHovered ? "opacity-0 pointer-events-none" : "opacity-100"
        }`}
      >
        <div className="flex items-start justify-between">
          <div>
            <div className="flex items-center gap-2 mb-1">
              <div className="w-2 h-2 rounded-full bg-green-500 animate-pulse shadow-[0_0_8px_rgba(34,197,94,0.6)]" />
              <span className="font-medium text-white tracking-tight">
                Hetzner Node-01
              </span>
            </div>
            <p className="text-[10px] font-mono text-neutral-500">
              SYS_STATUS: ONLINE
            </p>
          </div>
          <Activity className="text-neutral-800 w-10 h-10 -mt-1" />
        </div>

        <div className="mt-8 grid grid-cols-2 gap-4 border-t border-neutral-800/50 pt-6">
          <div>
            <p className="text-[10px] font-mono text-neutral-600 uppercase">
              Architecture
            </p>
            <p className="text-xs text-neutral-400">linux/amd64</p>
          </div>
          <div>
            <p className="text-[10px] font-mono text-neutral-600 uppercase">
              Provider
            </p>
            <p className="text-xs text-neutral-400">Hetzner Cloud</p>
          </div>
        </div>
      </div>

      {/* --- REGISTRY VIEW --- */}
      <div
        className={`absolute inset-0 transition-all duration-300 flex flex-col ${
          isHovered
            ? "opacity-100 translate-y-0"
            : "opacity-0 translate-y-4 pointer-events-none"
        }`}
      >
        {/* HEADER WITH SYNCED TIMER */}
        <div className="flex items-center justify-between mb-3 group/header">
          <h4 className="text-[10px] font-mono text-neutral-500 uppercase tracking-[0.2em] flex items-center gap-2 group-hover:text-blue-400 transition-colors">
            Explore Systems
            <motion.span
              animate={{ x: [0, 4, 0] }}
              transition={{
                duration: 1.5,
                repeat: Infinity,
                ease: "easeInOut",
              }}
              className="inline-block"
            >
              →
            </motion.span>
          </h4>

          <div className="flex items-center gap-2">
            <div className="relative w-12 h-[2.5px] bg-neutral-800 rounded-full overflow-hidden">
              <motion.div
                key={`${isHovered}-${page}`}
                initial={{ width: "0%" }}
                animate={isHovered ? { width: "100%" } : { width: "0%" }}
                transition={{
                  duration: isHovered ? INTERVAL_TIME / 1000 : 0,
                  ease: "linear",
                }}
                className="h-full bg-blue-500/50" // Changed to blue to match Link intent
              />
            </div>
            <span className="text-[9px] font-mono text-neutral-600">
              {String(page + 1).padStart(2, "0")}
            </span>
          </div>
        </div>

        <div className="flex-1 overflow-hidden">
          <RegistrySlider page={page} />
        </div>
      </div>
    </div>
  );
}

function RegistrySlider({ page }: { page: number }) {
  const currentItems = MONITORS.slice(
    page * ITEMS_PER_PAGE,
    (page + 1) * ITEMS_PER_PAGE,
  );

  return (
    <div className="relative h-full">
      <AnimatePresence mode="popLayout">
        <motion.div
          key={page}
          initial={{ opacity: 0, x: 10 }}
          animate={{ opacity: 1, x: 0 }}
          exit={{ opacity: 0, x: -10 }}
          transition={{ duration: 0.4, ease: "easeInOut" }}
          className="grid grid-cols-1 gap-1.5 w-full"
        >
          {currentItems.map((m) => (
            <div
              key={m.id}
              className="flex items-center justify-between bg-neutral-800/40 p-1.5 px-3 rounded-lg border border-neutral-700/30"
            >
              <span className="text-[11px] font-medium text-neutral-300 truncate mr-2">
                {m.name}
              </span>
              <div className="flex gap-1 shrink-0 scale-75 origin-right">
                <Image
                  src={`https://status.georgew.dev/api/badge/${m.id}/status`}
                  width={60}
                  height={20}
                  className="h-5 w-auto"
                  alt="System Status"
                  unoptimized
                />
                <Image
                  src={`https://status.georgew.dev/api/badge/${m.id}/avg-response/24`}
                  width={80}
                  height={20}
                  className="h-5 w-auto opacity-60"
                  alt="Average Response Time"
                  unoptimized
                />
              </div>
            </div>
          ))}
        </motion.div>
      </AnimatePresence>
    </div>
  );
}