/* ESPILON C2 — Shared utilities */

function escapeHtml(str) {
    const div = document.createElement('div');
    div.appendChild(document.createTextNode(str));
    return div.innerHTML;
}

function formatDuration(seconds) {
    if (seconds == null || isNaN(seconds)) return '-';
    seconds = Math.round(seconds);
    if (seconds < 60) return seconds + 's';
    if (seconds < 3600) return Math.floor(seconds / 60) + 'm ' + (seconds % 60) + 's';
    const h = Math.floor(seconds / 3600);
    const m = Math.floor((seconds % 3600) / 60);
    if (h < 24) return h + 'h ' + m + 'm';
    const d = Math.floor(h / 24);
    return d + 'd ' + (h % 24) + 'h';
}

function formatBytes(bytes) {
    if (bytes == null || isNaN(bytes)) return '-';
    if (bytes < 1024) return bytes + ' B';
    if (bytes < 1048576) return (bytes / 1024).toFixed(1) + ' KB';
    return (bytes / 1048576).toFixed(1) + ' MB';
}

function formatTimestamp(ts) {
    if (!ts) return '-';
    const d = typeof ts === 'number' ? new Date(ts * 1000) : new Date(ts);
    const pad = n => String(n).padStart(2, '0');
    return pad(d.getHours()) + ':' + pad(d.getMinutes()) + ':' + pad(d.getSeconds());
}

function debounce(fn, ms) {
    let timer;
    return function(...args) {
        clearTimeout(timer);
        timer = setTimeout(() => fn.apply(this, args), ms);
    };
}

function toast(msg, type) {
    const el = document.createElement('div');
    el.className = 'toast' + (type ? ' toast-' + type : '');
    el.textContent = msg;
    document.body.appendChild(el);
    setTimeout(() => el.remove(), 3000);
}