// === APPLICATION INIT ===

function parseHash() {
    const h = window.location.hash.replace(/^#\/?/, "").replace(/\/?$/, "").split("/").filter(Boolean);
    if (h[0] && ["hst","flg","itm","loc","ply"].includes(h[0].toLowerCase())) {
        state.base = h[0].toLowerCase();
    }
    if (h[1] && ["grid","tree","graph"].includes(h[1].toLowerCase())) {
        state.view = h[1].toLowerCase();
    }
}

function updateHash() {
    const p = [state.base];
    if (state.view !== "grid") p.push(state.view);
    window.location.hash = "/" + p.join("/") + "/";
}

async function init() {
    parseHash();

    // Update UI to match state
    document.querySelectorAll(".base-btn").forEach(b =>
        b.classList.toggle("active", b.dataset.base === state.base)
    );
    document.querySelectorAll(".view-tab").forEach(t =>
        t.classList.toggle("active", t.dataset.view === state.view)
    );

    // Show loading
    document.getElementById("grid-view").innerHTML = '<div class="loading">Cargando</div>';

    // Fetch initial data
    await Promise.all([fetchTags(), fetchGroups(), fetchLibraries()]);

    // Render UI
    renderGroups();
    renderLibraries();
    renderView();
}

// === EVENT BINDINGS ===
document.addEventListener("DOMContentLoaded", () => {
    // Base selector
    document.querySelectorAll(".base-btn").forEach(b => b.onclick = async () => {
        document.querySelectorAll(".base-btn").forEach(x => x.classList.remove("active"));
        b.classList.add("active");
        state.base = b.dataset.base;

        // Reset state
        state.group = "all";
        state.library = "all";
        state.libraryMembers.clear();
        state.search = "";
        state.graphEdges = [];
        state.treeEdges = [];
        clearSelection();
        closeDetail();
        document.getElementById("search").value = "";
        updateHash();

        // Reload
        document.getElementById("grid-view").innerHTML = '<div class="loading">Cargando</div>';
        await fetchTags();
        await fetchGroups();
        renderGroups();
        renderView();
    });

    // View tabs
    document.querySelectorAll(".view-tab").forEach(t => t.onclick = () => {
        document.querySelectorAll(".view-tab").forEach(x => x.classList.remove("active"));
        t.classList.add("active");
        state.view = t.dataset.view;
        updateHash();
        closeDetail();
        renderView();
    });

    // Search
    let st;
    document.getElementById("search").oninput = e => {
        clearTimeout(st);
        st = setTimeout(() => {
            state.search = e.target.value;
            renderView();
        }, 200);
    };

    // Language selector
    document.getElementById("lang-select").addEventListener("change", function(e) {
        state.lang = this.value;
        renderView();
        if (state.selectedTag) showDetail(state.selectedTag.mrf);
    });

    // Selection mode
    document.getElementById("btn-sel").onclick = () => {
        state.selectionMode = !state.selectionMode;
        document.getElementById("btn-sel").classList.toggle("active", state.selectionMode);
        if (!state.selectionMode) {
            state.selected.clear();
            updateSelCount();
        }
        renderView();
    };

    // Get selected
    document.getElementById("btn-get").onclick = () => {
        if (!state.selected.size) return toast("No hay seleccionados");
        navigator.clipboard.writeText([...state.selected].join("\n"))
            .then(() => toast(`Copiados ${state.selected.size} mrfs`));
    };

    // API modal
    document.getElementById("btn-api").onclick = () =>
        document.getElementById("api-modal").classList.add("open");
    document.getElementById("api-modal-close").onclick = () =>
        document.getElementById("api-modal").classList.remove("open");
    document.getElementById("api-modal").onclick = e => {
        if (e.target.id === "api-modal") e.target.classList.remove("open");
    };

    // Hash change
    window.onhashchange = () => {
        parseHash();
        init();
    };

    // Keyboard shortcuts
    document.onkeydown = e => {
        if (e.key === "Escape") {
            closeDetail();
            document.getElementById("api-modal").classList.remove("open");
            if (state.selectionMode) {
                clearSelection();
                renderView();
            }
        }
        if (e.key === "/" && document.activeElement.tagName !== "INPUT") {
            e.preventDefault();
            document.getElementById("search").focus();
        }
    };

    // Start app
    init();
});