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-base-800">
      {/* Error banner */}
      {error && (
        <div className="fixed top-0 inset-x-0 z-50 flex items-center justify-center gap-2 bg-cherry/10 border-b border-cherry/20 px-4 py-2 animate-fade-in">
          <AlertTriangle className="w-4 h-4 text-cherry flex-shrink-0" />
          <p className="text-xs text-cherry font-mono">{error}</p>
          <button
            onClick={refresh}
            className="ml-3 text-xs text-cherry hover:text-base-900 underline underline-offset-2 transition-colors font-mono"
          >
            Erneut versuchen
          </button>
        </div>
      )}

      {/* Header */}
      <header className="sticky top-0 z-40 border-b border-base-300 bg-base-50/95 backdrop-blur-sm">
        <div className="max-w-[1920px] mx-auto px-4 sm:px-6 lg:px-8 h-14 flex items-center justify-between">
          <div className="flex items-center gap-4">
            <h1 className="font-serif italic text-lg sm:text-xl text-base-900 tracking-tight">
              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 bg-base-100 border border-base-300 hover:border-base-500 transition-colors disabled:opacity-40"
              title="Daten aktualisieren"
            >
              <RefreshCw
                className={`w-3.5 h-3.5 text-base-600 ${loading ? "animate-spin" : ""}`}
              />
            </button>
            <Link
              to="/admin"
              className="flex items-center justify-center w-8 h-8 bg-base-100 border border-base-300 hover:border-base-500 transition-colors"
              title="Admin Panel"
            >
              <Settings className="w-3.5 h-3.5 text-base-600" />
            </Link>
            <Clock />
          </div>
        </div>
      </header>

      <main className="max-w-[1920px] mx-auto px-4 sm:px-6 lg:px-8 py-8">
        {loading && !data ? (
          <LoadingSkeleton />
        ) : data ? (
          <div className="space-y-10">
            {/* Section 01 — Wetter */}
            <section>
              <div className="section-label">
                <span className="section-number">01</span>
                <h2 className="section-title">Wetter</h2>
                <span className="section-rule" />
              </div>

              <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-px bg-base-300">
                <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>
              </div>
            </section>

            {/* Section 02 — Infrastruktur */}
            <section>
              <div className="section-label">
                <span className="section-number">02</span>
                <h2 className="section-title">Infrastruktur</h2>
                <span className="section-rule" />
              </div>

              <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-px bg-base-300">
                {data.servers.servers.map((srv) => (
                  <ServerCard key={srv.name} server={srv} />
                ))}
                <HomeAssistant data={data.ha} />
                <TasksCard data={data.tasks} />
              </div>
            </section>

            {/* Section 03 — MQTT (conditional) */}
            {(data.mqtt?.connected ||
              (data.mqtt?.entities?.length ?? 0) > 0) && (
              <section>
                <div className="section-label">
                  <span className="section-number">03</span>
                  <h2 className="section-title">MQTT</h2>
                  <span className="section-rule" />
                </div>

                <MqttCard data={data.mqtt} />
              </section>
            )}

            {/* Section 04 — Nachrichten */}
            <section>
              <NewsGrid data={data.news} />
            </section>

            {/* Footer */}
            <footer className="flex items-center justify-between py-4 border-t border-base-300">
              <p className="text-[10px] font-mono text-base-500">
                Letzte Aktualisierung:{" "}
                <span className="text-base-700">
                  {new Date(data.timestamp).toLocaleTimeString("de-DE", {
                    hour: "2-digit",
                    minute: "2-digit",
                    second: "2-digit",
                  })}
                </span>
              </p>
              <p className="text-[10px] font-mono text-base-500">
                Daily Briefing v2
              </p>
            </footer>
          </div>
        ) : null}
      </main>
    </div>
  );
}

/* ── Live indicator ─────────────────────────────────────── */

function LiveIndicator({ connected }: { connected: boolean }) {
  return (
    <div className="flex items-center gap-2 px-2.5 py-1 border border-base-300">
      <div className="relative">
        <div
          className={`w-1.5 h-1.5 ${connected ? "bg-mint" : "bg-base-500"}`}
          style={{ borderRadius: 0 }}
        />
        {connected && (
          <div
            className="absolute inset-0 w-1.5 h-1.5 bg-mint animate-ping opacity-40"
            style={{ borderRadius: 0 }}
          />
        )}
      </div>
      <span
        className={`text-[10px] font-mono font-medium ${
          connected ? "text-mint" : "text-base-500"
        }`}
      >
        {connected ? "Live" : "Offline"}
      </span>
      {connected ? (
        <Wifi className="w-3 h-3 text-mint/50" />
      ) : (
        <WifiOff className="w-3 h-3 text-base-500" />
      )}
    </div>
  );
}

/* ── Loading skeleton ───────────────────────────────────── */

function LoadingSkeleton() {
  return (
    <div className="space-y-10">
      {/* Section 01 skeleton */}
      <div>
        <div className="section-label">
          <span className="section-number">01</span>
          <div className="h-3 w-16 bg-base-200" />
          <span className="section-rule" />
        </div>
        <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-px bg-base-300">
          {Array.from({ length: 4 }).map((_, i) => (
            <SkeletonCard key={`w-${i}`} className="h-52" />
          ))}
        </div>
      </div>

      {/* Section 02 skeleton */}
      <div>
        <div className="section-label">
          <span className="section-number">02</span>
          <div className="h-3 w-24 bg-base-200" />
          <span className="section-rule" />
        </div>
        <div className="grid grid-cols-1 md:grid-cols-2 xl:grid-cols-4 gap-px bg-base-300">
          {Array.from({ length: 4 }).map((_, i) => (
            <SkeletonCard key={`s-${i}`} className="h-72" />
          ))}
        </div>
      </div>

      {/* Section 04 skeleton */}
      <div>
        <div className="section-label">
          <span className="section-number">04</span>
          <div className="h-3 w-28 bg-base-200" />
          <span className="section-rule" />
        </div>
        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-px bg-base-300">
          {Array.from({ length: 8 }).map((_, i) => (
            <SkeletonCard key={`n-${i}`} className="h-28" />
          ))}
        </div>
      </div>

      {/* Scan loader */}
      <div className="scan-loader" />
    </div>
  );
}

function SkeletonCard({ className = "" }: { className?: string }) {
  return (
    <div className={`bg-base-50 ${className}`}>
      <div className="p-5 space-y-3 animate-pulse">
        <div className="h-3 w-1/3 bg-base-200" />
        <div className="h-2 w-2/3 bg-base-200/60" />
        <div className="h-2 w-1/2 bg-base-200/60" />
      </div>
    </div>
  );
}