import { Link } from "react-router-dom";
import { useDashboard } from "../hooks/useDashboard";
import Clock from "../components/Clock";
import WeatherCard from "../components/WeatherCard";
import HourlyForecast from "../components/HourlyForecast";
import NewsGrid from "../components/NewsGrid";
import ServerCard from "../components/ServerCard";
import HomeAssistant from "../components/HomeAssistant";
import TasksCard from "../components/TasksCard";
import MqttCard from "../components/MqttCard";
import { RefreshCw, Wifi, WifiOff, AlertTriangle, Settings } from "lucide-react";

export default function Dashboard() {
  const { data, loading, error, connected, refresh } = useDashboard();

  return (
    <div className="min-h-screen text-white">
      {error && (
        <div className="fixed top-0 inset-x-0 z-50 flex items-center justify-center gap-2 bg-red-500/15 border-b border-red-500/20 backdrop-blur-sm px-4 py-2 animate-slide-up">
          <AlertTriangle className="w-4 h-4 text-red-400 flex-shrink-0" />
          <p className="text-xs text-red-300">{error}</p>
          <button onClick={refresh} className="ml-3 text-xs text-red-300 hover:text-white underline underline-offset-2 transition-colors">
            Erneut versuchen
          </button>
        </div>
      )}

      <header className="sticky top-0 z-40 border-b border-white/[0.04] bg-slate-950/80 backdrop-blur-lg">
        <div className="max-w-[1920px] mx-auto px-4 sm:px-6 lg:px-8 h-16 flex items-center justify-between">
          <div className="flex items-center gap-3">
            <h1 className="text-base sm:text-lg font-bold tracking-tight text-white">Daily Briefing</h1>
            <LiveIndicator connected={connected} />
          </div>
          <div className="flex items-center gap-3">
            <button
              onClick={refresh}
              disabled={loading}
              className="flex items-center justify-center w-8 h-8 rounded-lg bg-white/5 border border-white/[0.06] hover:bg-white/10 transition-colors disabled:opacity-40"
              title="Daten aktualisieren"
            >
              <RefreshCw className={`w-3.5 h-3.5 text-slate-400 ${loading ? "animate-spin" : ""}`} />
            </button>
            <Link
              to="/admin"
              className="flex items-center justify-center w-8 h-8 rounded-lg bg-white/5 border border-white/[0.06] hover:bg-white/10 transition-colors"
              title="Admin Panel"
            >
              <Settings className="w-3.5 h-3.5 text-slate-400" />
            </Link>
            <Clock />
          </div>
        </div>
      </header>

      <main className="max-w-[1920px] mx-auto px-4 sm:px-6 lg:px-8 py-6 space-y-6">
        {loading && !data ? (
          <LoadingSkeleton />
        ) : data ? (
          <>
            <section className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-4">
              <WeatherCard data={data.weather.primary} accent="cyan" />
              <WeatherCard data={data.weather.secondary} accent="amber" />
              <div className="md:col-span-2">
                <HourlyForecast slots={data.weather.hourly} />
              </div>
            </section>

            <section className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-4">
              {data.servers.servers.map((srv) => (
                <ServerCard key={srv.name} server={srv} />
              ))}
              <HomeAssistant data={data.ha} />
              <TasksCard data={data.tasks} />
            </section>

            {(data.mqtt?.connected || (data.mqtt?.entities?.length ?? 0) > 0) && (
              <section className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-4">
                <div className="md:col-span-2 xl:col-span-4">
                  <MqttCard data={data.mqtt} />
                </div>
              </section>
            )}

            <section>
              <NewsGrid data={data.news} />
            </section>

            <footer className="text-center pb-4">
              <p className="text-[10px] text-slate-700">
                Letzte Aktualisierung:{" "}
                {new Date(data.timestamp).toLocaleTimeString("de-DE", {
                  hour: "2-digit", minute: "2-digit", second: "2-digit",
                })}
              </p>
            </footer>
          </>
        ) : null}
      </main>
    </div>
  );
}

function LiveIndicator({ connected }: { connected: boolean }) {
  return (
    <div className="flex items-center gap-1.5 px-2.5 py-1 rounded-full bg-white/5 border border-white/[0.06]">
      <div className="relative">
        <div className={`w-1.5 h-1.5 rounded-full ${connected ? "bg-emerald-400" : "bg-slate-600"}`} />
        {connected && <div className="absolute inset-0 w-1.5 h-1.5 rounded-full bg-emerald-400 animate-ping opacity-50" />}
      </div>
      <span className={`text-[10px] font-medium ${connected ? "text-emerald-400" : "text-slate-600"}`}>
        {connected ? "Live" : "Offline"}
      </span>
      {connected ? <Wifi className="w-3 h-3 text-emerald-400/50" /> : <WifiOff className="w-3 h-3 text-slate-600" />}
    </div>
  );
}

function LoadingSkeleton() {
  return (
    <div className="space-y-6 animate-pulse">
      <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-4">
        <SkeletonCard className="h-52" />
        <SkeletonCard className="h-52" />
        <SkeletonCard className="h-24 md:col-span-2" />
      </div>
      <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-4">
        {Array.from({ length: 4 }).map((_, i) => <SkeletonCard key={i} className="h-72" />)}
      </div>
      <div>
        <div className="h-6 w-32 rounded bg-white/5 mb-4" />
        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3">
          {Array.from({ length: 8 }).map((_, i) => <SkeletonCard key={i} className="h-28" />)}
        </div>
      </div>
    </div>
  );
}

function SkeletonCard({ className = "" }: { className?: string }) {
  return (
    <div className={`glass-card ${className}`}>
      <div className="p-5 space-y-3">
        <div className="h-3 w-1/3 rounded bg-white/5" />
        <div className="h-2 w-2/3 rounded bg-white/[0.03]" />
        <div className="h-2 w-1/2 rounded bg-white/[0.03]" />
      </div>
    </div>
  );
}