/**
 * 广告点击上报：POST /api/app/ads/click（本站 Go 服务代理到上游，appId 由服务端固定为 12）。
 * - 广告元素由服务端模板输出 data-ads-id / data-ads-location，ID 无效时不输出，即不上报
 * - document 捕获阶段监听 click 与 auxclick（中键），不阻止默认行为、不影响广告链接打开
 * - 不依赖 request.js（导航页未加载），失败静默
 */
(function () {
  if (window.__adClickBound) return;
  window.__adClickBound = true;

  var ENDPOINT = "/api/app/ads/click";

  function positiveInt(value) {
    var text = String(value == null ? "" : value).trim();
    if (!/^\d+$/.test(text)) return 0;
    var number = Number(text);
    return Number.isSafeInteger(number) && number > 0 ? number : 0;
  }

  function payloadFrom(target) {
    if (!target || typeof target.closest !== "function") return null;
    var el = target.closest("[data-ads-id]");
    if (!el) return null;
    var adsId = positiveInt(el.getAttribute("data-ads-id"));
    var location = positiveInt(el.getAttribute("data-ads-location"));
    return adsId && location ? { adsId: adsId, location: location } : null;
  }

  function report(payload) {
    try {
      fetch(ENDPOINT, {
        method: "POST",
        headers: { "Content-Type": "application/json", Accept: "application/json" },
        body: JSON.stringify(payload),
        credentials: "same-origin",
        keepalive: true,
      }).catch(function () {});
    } catch (error) {
      // 上报失败不影响广告跳转。
    }
  }

  function onClick(event) {
    if (event.type === "auxclick" && event.button !== 1) return;
    var target = event.target;
    if (target && target.nodeType !== 1) target = target.parentElement;
    var payload = payloadFrom(target);
    if (payload) report(payload);
  }

  document.addEventListener("click", onClick, true);
  document.addEventListener("auxclick", onClick, true);
})();