/** The rows a record's own artist anchor found no count for — a feature's
 *  guest, a compilation's stranger — asked by each row's OWN Deezer artist
 *  id, the rule the desktop's search results follow. A row the backend has
 *  no count for keeps nothing: unknown is not a zero. */
export function loadTrackListeners(albumId, tracks) {
    if (albumId == null || catalog.listeners[albumId]) return;
    const want = (tracks || []).filter((t) => t.listeners == null && t.artist_id != null);
    if (!want.length) return;
    catalog.listeners[albumId] = { status: "loading", counts: {} };
    api.catalogTrackListeners(want.map((t) => ({ artistId: t.artist_id, title: t.title }))).then(
        (counts) => {
            const out = {};
            (counts || []).forEach((n, i) => { if (n != null && want[i]) out[want[i].id] = n; });
            catalog.listeners[albumId] = { status: "ready", counts: out };
        },
        () => { catalog.listeners[albumId] = { status: "error", counts: {} }; },
    );
}

/** Forget an artist's page and ask for it again — the desktop's
 *  `invalidateCatalogArtist`, for a hero that has just changed. The seed is
 *  kept, so the identity search does not run a second time. */
export function forgetArtist(name) {
    const k = artistKey(name);
    const cur = catalog.artists[k];
    if (!cur) return;
    delete catalog.artists[k];
    lookupArtist(name, cur.seed ?? null);
}

/** A photo from this phone as an artist's hero — the desktop's Choose hero,
 *  through the phone's own image picker. The page is asked again, so the
 *  banner, the ground and the accent all follow. */
export async function heroFromPhoto(id, name) {
    let r;
    try { r = await api.pickImage(); } catch (e) { if (/cancelled/.test(String(e))) return false; throw e; }
    if (!r?.path) return false;
    const hero = await api.setArtistHero(id, r.path);
    forgetArtist(name);
    note(`Hero set · ${hero.width}×${hero.height}`);
    return true;
}

/** The chosen hero removed — the catalog's own photos come back. */
export async function heroClear(id, name) {
    const removed = await api.clearArtistHero(id);
    forgetArtist(name);
    note(removed ? "The catalog's own photos are back" : "No custom hero here");
}

export function lookupAlbum(id) {