// === UI RENDER FUNCTIONS ===

function renderGroups() {
    const el = document.getElementById("groups-bar");

    // Count tags per group
    const gm = new Map();
    state.tags.forEach(t => {
        if (t.set_hst) {
            if (!gm.has(t.set_hst)) gm.set(t.set_hst, 0);
            gm.set(t.set_hst, gm.get(t.set_hst) + 1);
        }
    });

    const groups = [...gm.entries()].sort((a,b) => b[1] - a[1]);

    el.innerHTML = `<button class="group-btn ${state.group === "all" ? "active" : ""}" data-group="all">Todos (${state.tags.length})</button>` +
        groups.slice(0, 20).map(([mrf, cnt]) => {
            const info = state.groups.find(g => g.mrf === mrf);
            const name = info ? (info.name_es || info.ref) : mrf.slice(0, 6);
            return `<button class="group-btn ${state.group === mrf ? "active" : ""}" data-group="${mrf}">${name} (${cnt})</button>`;
        }).join("");

    el.querySelectorAll(".group-btn").forEach(b => {
        b.onclick = () => {
            state.group = b.dataset.group;
            renderGroups();
            renderView();
        };
    });
}

function renderLibraries() {
    const el = document.getElementById("left-panel");

    el.innerHTML = `<div class="lib-icon ${state.library === "all" ? "active" : ""}" data-lib="all"><span>ALL</span></div>` +
        state.libraries.map(lib => {
            const icon = lib.img_thumb_url || lib.icon_url || "";
            const name = lib.name || lib.name_es || lib.ref || lib.mrf.slice(0, 6);
            return `<div class="lib-icon ${state.library === lib.mrf ? "active" : ""}" data-lib="${lib.mrf}" title="${name}">
                ${icon ? `<img src="${icon}" alt="">` : ""}
                <span>${name.slice(0, 8)}</span>
            </div>`;
        }).join("");

    el.querySelectorAll(".lib-icon").forEach(i => {
        i.onclick = async () => {
            state.library = i.dataset.lib;
            state.libraryMembers = state.library !== "all"
                ? new Set(await fetchLibraryMembers(state.library))
                : new Set();
            renderLibraries();
            renderView();
        };
    });
}

function renderView() {
    // Toggle view visibility
    document.getElementById("grid-view").style.display = state.view === "grid" ? "flex" : "none";
    document.getElementById("tree-view").style.display = state.view === "tree" ? "block" : "none";
    document.getElementById("graph-view").style.display = state.view === "graph" ? "block" : "none";

    // Render active view
    if (state.view === "grid") renderGrid();
    else if (state.view === "tree") renderTree();
    else if (state.view === "graph") initGraph();
}