(() => {
    "use strict";

    const recentList = document.getElementById("steamRecent");
    const topList = document.getElementById("steamTop");
    const updated = document.getElementById("steamUpdated");
    const refresh = document.getElementById("steamRefresh");
    const countEl = document.getElementById("steamCount");
    if (!recentList || !topList || !updated) return;

    const SOURCE = "/api/steam/activity";
    const POLL_MS = 60000;

    let timer = null;
    let busy = false;

    const escapeHtml = (s) =>
        String(s).replace(/[&<>"']/g, (c) => ({
            "&": "&amp;", "<": "&lt;", ">": "&gt;", '"': "&quot;", "'": "&#39;",
        })[c]);

    const IMG_FALLBACK = "data:image/svg+xml," + encodeURIComponent(
        "<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 48'>" +
        "<rect width='48' height='48' rx='8' fill='#0c0e16'/>" +
        "<text x='24' y='31' font-size='20' text-anchor='middle'>🎮</text></svg>"
    );

    const fmtHours = (h) => {
        if (h == null) return "";
        if (h >= 168) return `${(h / 24).toFixed(1)} д`;
        if (h >= 1) return `${h.toFixed(1)} ч`;
        return `${Math.round(h * 60)} мин`;
    };

    const fmtDate = (ts) => {
        if (!ts) return "";
        const d = new Date(ts * 1000);
        const today = new Date();
        today.setHours(0, 0, 0, 0);
        if (d >= today) return "сегодня";
        if (d >= new Date(today.getTime() - 86400000)) return "вчера";
        return d.toLocaleDateString("ru-RU", { day: "2-digit", month: "2-digit", year: "numeric" });
    };

    const bindCovers = (root) => {
        root.querySelectorAll("img.st-cover").forEach((img) => {
            img.addEventListener("error", () => { img.src = IMG_FALLBACK; }, { once: true });
        });
    };

    const rowHtml = (g, right, sub) => `<li class="ym-track">
        <a class="ym-link" href="${escapeHtml(g.url)}" target="_blank" rel="noopener">
            <img class="ym-cover st-cover" src="${escapeHtml(g.header)}" alt="" loading="lazy" width="48" height="48">
            <span class="ym-info">
                <span class="ym-track-title">${escapeHtml(g.name)}</span>
                <span class="ym-artists">${sub}</span>
            </span>
            <span class="ym-day">${right}</span>
        </a>
    </li>`;

    const emptyStatus = (closed) => ({
        html: closed
            ? "Детали игр скрыты в настройках приватности Steam"
            : "Пока нет данных",
        cls: closed ? "ym-status ym-error" : "ym-status",
    });

    const renderGames = (data) => {
        const closed = Boolean(data.profile && data.profile.public === false);

        const recentHtml = (data.recent || []).map((g) => {
            const parts = [];
            if (g.hours_total) parts.push(`всего ${fmtHours(g.hours_total)}`);
            const last = fmtDate(g.last_played);
            if (last) parts.push(`играл ${last}`);
            const right = g.hours_2weeks != null ? `${fmtHours(g.hours_2weeks)} / 2 нед` : "";
            return rowHtml(g, right, parts.join(" · ") || "—");
        }).join("");

        const topHtml = (data.top || []).map((g) => {
            const last = fmtDate(g.last_played);
            const sub = last ? `играл ${last}` : "—";
            return rowHtml(g, fmtHours(g.hours_total), sub);
        }).join("");

        const recentEmpty = emptyStatus(closed);
        const topEmpty = emptyStatus(closed);
        recentList.innerHTML = recentHtml || `<li class="${recentEmpty.cls}">${recentEmpty.html}</li>`;
        topList.innerHTML = topHtml || `<li class="${topEmpty.cls}">${topEmpty.html}</li>`;

        bindCovers(recentList);
        bindCovers(topList);

        if (countEl) countEl.textContent = data.game_count ? `всего игр: ${data.game_count}` : "";
    };

    const showError = (msg) => {
        const html = `<li class="ym-status ym-error">${escapeHtml(msg)}</li>`;
        recentList.innerHTML = html;
        topList.innerHTML = html;
        updated.textContent = "ошибка";
    };

    const tick = async () => {
        if (busy) return;
        busy = true;
        try {
            const res = await fetch(SOURCE, { headers: { Accept: "application/json" } });
            const data = await res.json();
            if (!res.ok || !data.ok) {
                showError(data.error || `Ошибка ${res.status}`);
                return;
            }
            renderGames(data);
            const t = new Date(data.updated_at * 1000);
            updated.textContent = `обновлено ${t.toLocaleTimeString("ru-RU")}${data.stale ? " (кэш)" : ""}`;
        } catch (e) {
            showError("Нет связи с сервером");
        } finally {
            busy = false;
            if (timer) clearTimeout(timer);
            timer = setTimeout(tick, POLL_MS);
        }
    };

    const poke = () => {
        if (timer) clearTimeout(timer);
        tick();
    };

    if (refresh) refresh.addEventListener("click", poke);
    document.addEventListener("visibilitychange", () => {
        if (!document.hidden) poke();
    });

    tick();
})();