let currentUser = null;

// Auth check
fetch('/api/auth/me').then(r => r.ok ? r.json() : null).then(u => {
    currentUser = u;
    updateNavbar();
    updateSidebar();
});

function updateNavbar() {
    if (currentUser) {
        document.getElementById('userName').textContent = currentUser.name;
        document.getElementById('userMenu').classList.remove('d-none');
        document.getElementById('loginBtn').classList.add('d-none');
    } else {
        document.getElementById('userMenu').classList.add('d-none');
        document.getElementById('loginBtn').classList.remove('d-none');
    }
}

function updateSidebar() {
    const isAdmin = currentUser && currentUser.role === 'admin';
    document.querySelectorAll('.sidebar-admin').forEach(el => {
        el.style.display = isAdmin ? '' : 'none';
    });
}

// Labels for display
const deviceLabels = {
    long_name: "Name",
    short_name: "Kurzname",
    node_num: "Node-Nummer",
    hw_model: "Hardware",
    firmware_version: "Firmware",
    role: "Role",
    max_channels: "Max Channels",
};

const loraLabels = {
    region: "Region",
    modem_preset: "Modem-Preset",
    hop_limit: "Hop-Limit",
    tx_power: "TX-Power",
    bandwidth: "Bandwidth",
    frequency_offset: "Freq-Offset",
    tx_enabled: "TX aktiviert",
    use_preset: "Preset nutzen",
};

const positionLabels = {
    gps_mode: "GPS-Modus",
    position_broadcast_secs: "Broadcast-Interval (s)",
    fixed_position: "Feste Position",
};

const powerLabels = {
    mesh_sds_timeout_secs: "Mesh-SDS-Timeout (s)",
    ls_secs: "LS-Secs",
    min_wake_secs: "Min-Wake-Secs",
    is_power_saving: "Energiesparmodus",
};

function renderKeyValue(tableId, data, labels) {
    const tbody = document.getElementById(tableId);
    const rows = [];
    for (const [key, label] of Object.entries(labels)) {
        const val = data[key];
        if (val === "" || val === undefined || val === null) continue;
        const display = typeof val === "boolean" ? (val ? "Ja" : "Nein") : String(val);
        rows.push(`<tr><td class="text-body-secondary" style="width:45%">${escapeHtml(label)}</td><td>${escapeHtml(display)}</td></tr>`);
    }
    tbody.innerHTML = rows.length > 0 ? rows.join("") : '<tr><td colspan="2" class="text-center text-body-secondary py-2">Keine Daten</td></tr>';
}

function renderChannels(channels) {
    const tbody = document.getElementById("channelsTable");
    if (!channels || channels.length === 0) {
        tbody.innerHTML = '<tr><td colspan="4" class="text-center text-body-secondary py-2">Keine Channels</td></tr>';
        return;
    }
    tbody.innerHTML = channels.map(ch =>
        `<tr><td>${ch.index}</td><td>${escapeHtml(ch.name)}</td><td>${escapeHtml(ch.role)}</td><td>${escapeHtml(ch.psk)}</td></tr>`
    ).join("");
}

function renderBtNet(bluetooth, network) {
    const tbody = document.getElementById("btNetTable");
    const rows = [];
    const btLabels = { enabled: "BT aktiviert", mode: "BT-Modus" };
    const netLabels = { wifi_enabled: "WiFi aktiviert", ntp_server: "NTP-Server" };

    for (const [key, label] of Object.entries(btLabels)) {
        const val = bluetooth[key];
        if (val === "" || val === undefined || val === null) continue;
        const display = typeof val === "boolean" ? (val ? "Ja" : "Nein") : String(val);
        rows.push(`<tr><td class="text-body-secondary" style="width:45%">${escapeHtml(label)}</td><td>${escapeHtml(display)}</td></tr>`);
    }
    for (const [key, label] of Object.entries(netLabels)) {
        const val = network[key];
        if (val === "" || val === undefined || val === null) continue;
        const display = typeof val === "boolean" ? (val ? "Ja" : "Nein") : String(val);
        rows.push(`<tr><td class="text-body-secondary" style="width:45%">${escapeHtml(label)}</td><td>${escapeHtml(display)}</td></tr>`);
    }
    tbody.innerHTML = rows.length > 0 ? rows.join("") : '<tr><td colspan="2" class="text-center text-body-secondary py-2">Keine Daten</td></tr>';
}

async function loadConfig() {
    try {
        const resp = await fetch("/api/node/config");
        if (!resp.ok) throw new Error(`HTTP ${resp.status}`);
        const data = await resp.json();

        renderKeyValue("deviceTable", data.device || {}, deviceLabels);
        renderKeyValue("loraTable", data.lora || {}, loraLabels);
        renderChannels(data.channels || []);
        renderKeyValue("positionTable", data.position || {}, positionLabels);
        renderKeyValue("powerTable", data.power || {}, powerLabels);
        renderBtNet(data.bluetooth || {}, data.network || {});
    } catch (e) {
        console.error("Failed to load config:", e);
        document.getElementById("deviceTable").innerHTML =
            '<tr><td colspan="2" class="text-center text-danger py-2">Fehler beim Laden</td></tr>';
    }
}

function escapeHtml(str) {
    if (!str) return "";
    const div = document.createElement("div");
    div.textContent = str;
    return div.innerHTML;
}

// Theme toggle
const themeToggle = document.getElementById("themeToggle");
const themeIcon = document.getElementById("themeIcon");

function applyTheme(theme) {
    document.documentElement.setAttribute("data-bs-theme", theme);
    themeIcon.className = theme === "dark" ? "bi bi-sun-fill" : "bi bi-moon-fill";
    localStorage.setItem("theme", theme);
}

applyTheme(localStorage.getItem("theme") || "dark");

themeToggle.addEventListener("click", () => {
    const current = document.documentElement.getAttribute("data-bs-theme");
    applyTheme(current === "dark" ? "light" : "dark");
});

// Sidebar toggle (mobile)
const sidebarToggle = document.getElementById("sidebarToggle");
const sidebar = document.getElementById("sidebar");
const sidebarBackdrop = document.getElementById("sidebarBackdrop");

if (sidebarToggle) {
    sidebarToggle.addEventListener("click", () => sidebar.classList.toggle("open"));
    sidebarBackdrop.addEventListener("click", () => sidebar.classList.remove("open"));
}

loadConfig();