import { useEffect, useState } from "react";
import api from "../lib/api";
import { toast } from "sonner";
import { Trash2, Star, Film, Settings as SettingsIcon, Download, RefreshCcw, FolderSearch, Wrench } from "lucide-react";
import { useNavigate, Link } from "react-router-dom";

export default function Admin() {
  const nav = useNavigate();
  const [movies, setMovies] = useState([]);
  const [shows, setShows] = useState([]);
  const [transcoding, setTranscoding] = useState({});

  const load = async () => {
    const [{ data: m }, { data: s }] = await Promise.all([
      api.get("/movies"),
      api.get("/shows").catch(() => ({ data: [] })),
    ]);
    setMovies(m); setShows(s);
  };
  useEffect(() => { load(); }, []);

  // Poll for transcoding status
  useEffect(() => {
    const inProgress = movies.some((m) => m.hls_status === "running" || m.hls_status === "pending");
    if (!inProgress) return;
    const t = setInterval(load, 3000);
    return () => clearInterval(t);
  }, [movies]);

  const remove = async (id) => {
    if (!window.confirm("Remove this movie permanently?")) return;
    await api.delete(`/movies/${id}`);
    toast.success("Removed");
    load();
  };

  const toggleFeatured = async (m) => {
    await api.patch(`/movies/${m.id}`, { featured: !m.featured });
    load();
  };

  const startTranscode = async (m, quality = "quick") => {
    setTranscoding({ ...transcoding, [m.id]: true });
    try {
      await api.post(`/movies/${m.id}/transcode`, { quality });
      toast.success(`${quality === "abr" ? "ABR" : "Quick"} transcode started`);
      load();
    } catch (err) {
      toast.error(err.response?.data?.detail || "Could not start transcode");
    } finally {
      setTranscoding({ ...transcoding, [m.id]: false });
    }
  };

  const hlsLabel = (m) => {
    if (m.hls_status === "done") {
      return m.hls_path === "master.m3u8" ? "ABR" : "Quick";
    }
    return null;
  };

  const hlsStatusBadge = (m) => {
    if (!m.hls_status) return null;
    const colors = {
      pending: "text-[#fcd34d]",
      running: "text-[#fcd34d]",
      done: "text-[#86efac]",
      failed: "text-[#fca5a5]",
    };
    const variant = m.hls_status === "done" ? hlsLabel(m) : "";
    return <span className={`text-[9px] uppercase tracking-[0.2em] ${colors[m.hls_status] || "text-[#8A8A8A]"}`}>HLS {m.hls_status}{variant ? ` · ${variant}` : ""}</span>;
  };

  return (
    <div className="min-h-screen bg-[#050505] pt-32 pb-24" data-testid="admin-page">
      <div className="px-6 md:px-12 max-w-[1500px] mx-auto">
        <span className="text-xs uppercase tracking-[0.3em] text-[#D9381E]">Library management</span>
        <h1 className="font-display text-5xl md:text-6xl font-black tracking-tighter text-white mt-3">Admin</h1>
        <p className="text-[#8A8A8A] mt-4">Manage your library, requests, integrations.</p>

        <div className="mt-10 flex flex-wrap gap-3">
          <Link to="/admin/upload" className="flex items-center gap-2 bg-[#D9381E] hover:bg-[#ED4B32] text-white px-5 py-2 text-xs uppercase tracking-[0.2em]" data-testid="admin-upload-link">
            <Film size={14} strokeWidth={1.5} /> Upload Movie
          </Link>
          <Link to="/admin/radarr" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10" data-testid="admin-radarr-link">
            <Download size={14} strokeWidth={1.5} /> Radarr Import
          </Link>
          <Link to="/admin/scan" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10" data-testid="admin-scan-link">
            <FolderSearch size={14} strokeWidth={1.5} /> Library Scan
          </Link>
          <Link to="/admin/cleanup" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10" data-testid="admin-cleanup-link">
            <Wrench size={14} strokeWidth={1.5} /> Library Cleanup
          </Link>
          <Link to="/admin/queue" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10" data-testid="admin-queue-link">
            <SettingsIcon size={14} strokeWidth={1.5} /> Queue
          </Link>
          <Link to="/admin/users" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10" data-testid="admin-users-link">
            <SettingsIcon size={14} strokeWidth={1.5} /> Users
          </Link>
          <Link to="/requests" className="flex items-center gap-2 bg-white/10 hover:bg-white/20 text-white px-5 py-2 text-xs uppercase tracking-[0.2em] border border-white/10">
            Review Requests
          </Link>
        </div>

        <div className="mt-12 border border-[#222]">
          <div className="grid grid-cols-12 px-5 py-3 border-b border-[#222] text-[10px] uppercase tracking-[0.3em] text-[#8A8A8A]">
            <span className="col-span-4">Title</span>
            <span className="col-span-1">Year</span>
            <span className="col-span-1">Rating</span>
            <span className="col-span-2">Source</span>
            <span className="col-span-2">HLS</span>
            <span className="col-span-2 text-right">Actions</span>
          </div>
          {movies.map((m) => (
            <div key={m.id} className="grid grid-cols-12 items-center px-5 py-4 border-b border-[#222] last:border-b-0 hover:bg-[#0F0F0F] transition-colors" data-testid={`admin-movie-row-${m.id}`}>
              <div className="col-span-4 flex items-center gap-3 min-w-0">
                <img src={m.poster_url} alt="" className="w-10 h-14 object-cover" />
                <span className="text-white truncate">{m.title}</span>
              </div>
              <span className="col-span-1 text-[#8A8A8A] text-sm">{m.year}</span>
              <span className="col-span-1 text-[#8A8A8A] text-sm">{m.rating}</span>
              <span className="col-span-2 text-[10px] uppercase tracking-[0.3em] text-[#8A8A8A]">{m.storage_type}</span>
              <span className="col-span-2">{hlsStatusBadge(m)}</span>
              <div className="col-span-2 flex justify-end gap-2">
                {(m.storage_type === "local" || m.storage_type === "radarr" || m.storage_type === "scan") && m.hls_status !== "running" && m.hls_status !== "pending" && (
                  <div className="flex gap-1">
                    <button onClick={() => startTranscode(m, "quick")} disabled={transcoding[m.id]}
                      title="Quick transcode (stream-copy, single bitrate)"
                      className="text-[10px] uppercase tracking-[0.2em] border border-[#222] hover:border-[#D9381E] hover:text-[#D9381E] text-[#8A8A8A] px-2 py-1 disabled:opacity-50"
                      data-testid={`transcode-quick-${m.id}`}>Quick</button>
                    <button onClick={() => startTranscode(m, "audio")} disabled={transcoding[m.id]}
                      title="Fix audio only (video untouched, audio re-encoded to AAC) — fast, fixes no-sound from AC3/DTS/EAC3"
                      className="text-[10px] uppercase tracking-[0.2em] border border-[#222] hover:border-[#86efac] hover:text-[#86efac] text-[#8A8A8A] px-2 py-1 disabled:opacity-50"
                      data-testid={`transcode-audio-${m.id}`}>Audio</button>
                    <button onClick={() => startTranscode(m, "abr")} disabled={transcoding[m.id]}
                      title="Adaptive bitrate (re-encodes to 360/480/720/1080p — slow)"
                      className="text-[10px] uppercase tracking-[0.2em] border border-[#222] hover:border-[#D9381E] hover:text-[#D9381E] text-[#8A8A8A] px-2 py-1 disabled:opacity-50"
                      data-testid={`transcode-abr-${m.id}`}>ABR</button>
                  </div>
                )}
                <button onClick={() => toggleFeatured(m)} className={`${m.featured ? "text-[#D9381E]" : "text-[#8A8A8A]"} hover:text-[#ED4B32] transition-colors`} aria-label="Feature" data-testid={`feature-${m.id}`}>
                  <Star size={16} strokeWidth={1.5} fill={m.featured ? "#D9381E" : "none"} />
                </button>
                <button onClick={() => remove(m.id)} className="text-[#8A8A8A] hover:text-[#fca5a5] transition-colors" aria-label="Delete" data-testid={`delete-${m.id}`}>
                  <Trash2 size={16} strokeWidth={1.5} />
                </button>
              </div>
            </div>
          ))}
        </div>

        {shows.length > 0 && (
          <div className="mt-12">
            <h2 className="font-display text-2xl font-bold tracking-tight text-white mb-4">Series</h2>
            <div className="border border-[#222]">
              <div className="grid grid-cols-12 px-5 py-3 border-b border-[#222] text-[10px] uppercase tracking-[0.3em] text-[#8A8A8A]">
                <span className="col-span-6">Title</span>
                <span className="col-span-2">Year</span>
                <span className="col-span-2">Episodes</span>
                <span className="col-span-2 text-right">Actions</span>
              </div>
              {shows.map((s) => (
                <div key={s.id} className="grid grid-cols-12 items-center px-5 py-4 border-b border-[#222] last:border-b-0 hover:bg-[#0F0F0F] transition-colors" data-testid={`admin-show-row-${s.id}`}>
                  <div className="col-span-6 flex items-center gap-3 min-w-0">
                    <img src={s.poster_url} alt="" className="w-10 h-14 object-cover" />
                    <span className="text-white truncate">{s.title}</span>
                  </div>
                  <span className="col-span-2 text-[#8A8A8A] text-sm">{s.year}</span>
                  <span className="col-span-2 text-[#8A8A8A] text-sm">{s.season_count}s · {s.episode_count}e</span>
                  <div className="col-span-2 flex justify-end">
                    <a href={`/admin/shows/${s.id}/episodes`} className="text-[10px] uppercase tracking-[0.2em] border border-[#222] hover:border-[#D9381E] hover:text-[#D9381E] text-[#8A8A8A] px-3 py-1 transition-colors" data-testid={`manage-episodes-${s.id}`}>
                      Manage Episodes
                    </a>
                  </div>
                </div>
              ))}
            </div>
          </div>
        )}
      </div>
    </div>
  );
}