const elementCache = new Map();

export function qs(selector) {
  if (!elementCache.has(selector)) {
    elementCache.set(selector, document.querySelector(selector));
  }
  return elementCache.get(selector);
}

export function escapeHtml(value) {
  return String(value)
    .replaceAll("&", "&")
    .replaceAll("<", "&lt;")
    .replaceAll(">", "&gt;")
    .replaceAll('"', "&quot;")
    .replaceAll("'", "&#039;");
}

export const VIEW_LABELS = {
  overview: "系统总览",
  inspection: "视频巡检",
  events: "告警中心",
  robots: "消息机器人",
  risks: "风险台账",
  settings: "系统设置",
};

export const STATUS_LABELS = {
  pending: "待处置",
  acknowledged: "已确认",
  resolved: "已解决",
};

const CLASS_LABELS = { fire: "火焰", smoke: "烟雾" };

export function classLabel(name) {
  return CLASS_LABELS[name] || escapeHtml(String(name));
}

export function formatDate(value) {
  if (!value) return "--";
  return new Date(value).toLocaleString("zh-CN", { hour12: false });
}

export function formatTime(seconds) {
  if (!Number.isFinite(seconds)) return "00:00";
  const minutes = Math.floor(seconds / 60);
  const remaining = Math.floor(seconds % 60);
  return `${String(minutes).padStart(2, "0")}:${String(remaining).padStart(2, "0")}`;
}

export function enabledChannelNames(channels = {}) {
  const names = [];
  if (channels.wechat) names.push("企业微信");
  if (channels.feishu) names.push("飞书");
  return names;
}