"use client";

import { useEffect, useMemo, useState } from "react";
import { PageHead } from "../../_ui/page-head";
import { CoverArt } from "../../_ui/cover-art";
import { AlbumModal } from "../../_ui/album-modal";
import { categoryOf, TAB_ORDER, type Category } from "../../_ui/categories";

type Release = {
  id: string;
  rgMbid: string | null;
  album: string;
  primaryType: string | null;
  secondaryTypes: string[];
  firstReleaseDate: string | null;
  monitored: boolean;
  state: string;
  currentQualityClass: number | null;
};
type Detail = { id: string; name: string; autoMonitorFuture: boolean; showAllTypes: boolean; releases: Release[] };

function badge(r: Release): { label: string; cls: string } {
  if (r.currentQualityClass !== null) return { label: `Have q${r.currentQualityClass}`, cls: "chip done" };
  if (r.monitored) return { label: r.state === "wanted" ? "Wanted" : r.state, cls: "chip working" };
  return { label: "Dormant", cls: "chip" };
}

export function DiscographyClient({ id }: { id: string }) {
  const [detail, setDetail] = useState<Detail | null>(null);
  const [tab, setTab] = useState<"All" | Category>("Albums");
  const [openAlbum, setOpenAlbum] = useState<Release | null>(null);

  async function refresh() {
    const res = await fetch(`/api/artists/${id}?all=true`);
    setDetail(res.ok ? await res.json() : null);
  }
  useEffect(() => {
    refresh();
  }, [id]);

  async function toggleMonitor(r: Release) {
    await fetch(`/api/releases/${r.id}`, {
      method: "PATCH",
      headers: { "content-type": "application/json" },
      body: JSON.stringify({ monitored: !r.monitored }),
    });
    refresh();
  }
  async function searchNow(r: Release) {
    await fetch(`/api/releases/${r.id}/search`, { method: "POST" });
    refresh();
  }

  const counts = useMemo(() => {
    const c: Record<string, number> = {};
    detail?.releases.forEach((r) => {
      c[categoryOf(r)] = (c[categoryOf(r)] ?? 0) + 1;
    });
    return c;
  }, [detail]);

  if (!detail) return <p className="empty">Loading…</p>;

  const tabs: ("All" | Category)[] = ["All", ...TAB_ORDER.filter((t) => counts[t])];
  const visible = tab === "All" ? detail.releases : detail.releases.filter((r) => categoryOf(r) === tab);

  return (
    <div>
      <PageHead title={detail.name} eyebrow="Discography" />

      <div className="tabs">
        {tabs.map((t) => (
          <button key={t} className={`tab${tab === t ? " active" : ""}`} onClick={() => setTab(t)}>
            {t}
            <span className="n">{t === "All" ? detail.releases.length : counts[t]}</span>
          </button>
        ))}
      </div>

      <ul className="list">
        {visible.map((r) => {
          const b = badge(r);
          return (
            <li key={r.id} className="list-row">
              <div className="main">
                <button className="disco-open" onClick={() => setOpenAlbum(r)} aria-label={`Open ${r.album}`}>
                  <CoverArt rgMbid={r.rgMbid} alt={r.album} className="thumb" />
                  <span>
                    <span className="rtitle">
                      {r.album}
                      {r.firstReleaseDate ? <span className="dim"> ({r.firstReleaseDate.slice(0, 4)})</span> : null}
                    </span>
                    <span className="rmeta">
                      {r.primaryType ? <span>{r.primaryType}</span> : null}
                      {r.secondaryTypes.length ? (
                        <>
                          <span className="dot">·</span>
                          <span>{r.secondaryTypes.join(", ")}</span>
                        </>
                      ) : null}
                    </span>
                  </span>
                </button>
              </div>
              <div className="actions">
                <span className={b.cls}>{b.label}</span>
                <label className="toggle">
                  <input type="checkbox" aria-label={`monitor ${r.album}`} checked={r.monitored} onChange={() => toggleMonitor(r)} />
                  monitor
                </label>
                <button className="btn sm ghost" onClick={() => searchNow(r)}>
                  Search now
                </button>
              </div>
            </li>
          );
        })}
      </ul>

      {openAlbum ? (
        <AlbumModal
          open
          onClose={() => setOpenAlbum(null)}
          album={{
            rgMbid: openAlbum.rgMbid,
            album: openAlbum.album,
            artist: detail.name,
            year: openAlbum.firstReleaseDate?.slice(0, 4) ?? null,
            type: openAlbum.primaryType,
          }}
          status={<span className={badge(openAlbum).cls}>{badge(openAlbum).label}</span>}
          actions={
            <button
              className="btn sm ghost"
              onClick={() => {
                searchNow(openAlbum);
                setOpenAlbum(null);
              }}
            >
              Search now
            </button>
          }
        />
      ) : null}
    </div>
  );
}