(function () {
  const elements = {
    title: document.getElementById("mainTitle"),
    corpName: document.getElementById("corpName"),
    hintText: document.getElementById("hintText"),
    openButton: document.getElementById("openButton"),
    statusText: document.getElementById("statusText"),
    primaryInitial: document.getElementById("primaryInitial"),
    primaryAvatar: document.getElementById("primaryAvatar"),
    primaryAvatarFallback: document.getElementById("primaryAvatarFallback"),
    secondaryAvatar: document.getElementById("secondaryAvatar"),
    secondaryAvatarFallback: document.getElementById("secondaryAvatarFallback"),
    friendMeta: document.getElementById("friendMeta"),
  };

  let scheme = "";

  function normalizeText(value) {
    return typeof value === "string" ? value.trim() : value ? String(value).trim() : "";
  }

  function getRecordId() {
    const params = new URLSearchParams(window.location.search);
    const queryId = normalizeText(params.get("id"));
    if (queryId) return queryId;

    const match = window.location.pathname.match(/\/sms\/([^/?#]+)/);
    return match ? decodeURIComponent(match[1]) : "";
  }

  function getApiBase() {
    const apiUrl = normalizeText(window.api_url);
    return apiUrl ? apiUrl.replace(/\/+$/, "") : "";
  }

  function setStatus(text) {
    elements.statusText.textContent = text;
  }

  function setError(message) {
    elements.title.textContent = "链接暂不可用";
    elements.hintText.textContent = message || "请联系工作人员重新获取好友链接";
    elements.friendMeta.textContent = "";
    elements.openButton.textContent = "无法打开";
    elements.openButton.disabled = true;
    setStatus("");
  }

  function setAvatar(src, friendName, imageEl, fallbackEl) {
    const avatar = normalizeText(src);
    if (fallbackEl === elements.primaryAvatarFallback) {
      elements.primaryInitial.textContent = friendName.slice(0, 1) || "医";
    }
    fallbackEl.classList.remove("has-image");
    imageEl.removeAttribute("src");

    if (!avatar) return;
    imageEl.onload = function () {
      fallbackEl.classList.add("has-image");
    };
    imageEl.onerror = function () {
      fallbackEl.classList.remove("has-image");
      imageEl.removeAttribute("src");
    };
    imageEl.src = avatar;
  }

  function fillPage(data) {
    const friendName = normalizeText(data.friendName) || "医生";
    const corpName = normalizeText(data.corpName) || "患者精益管理服务平台";
    const friendJob = normalizeText(data.friendJob || data.job);
    const friendIntro = normalizeText(data.friendIntro || data.memberTroduce);
    const friendAvatar = normalizeText(data.friendAvatar || data.avatar);
    const avatarList = Array.isArray(data.avatarList) ? data.avatarList.map(normalizeText).filter(Boolean) : [];
    const secondaryAvatar = normalizeText(data.patientAvatar || data.customerAvatar || avatarList[1]);
    const title = friendName.endsWith("医生") ? `${friendName}服务好友` : `${friendName}医生服务好友`;

    document.title = normalizeText(data.title) || "添加好友";
    elements.title.textContent = title;
    elements.corpName.textContent = corpName;
    elements.friendMeta.textContent = friendJob || friendIntro || "";
    elements.friendMeta.hidden = !elements.friendMeta.textContent;
    elements.hintText.textContent = normalizeText(data.hintText) || "点击下方按钮，添加企业微信好友";
    elements.openButton.textContent = normalizeText(data.actionText) || "去 加 好 友";
    setAvatar(friendAvatar || avatarList[0], friendName, elements.primaryAvatar, elements.primaryAvatarFallback);
    setAvatar(secondaryAvatar, "患", elements.secondaryAvatar, elements.secondaryAvatarFallback);
    elements.openButton.disabled = false;
    scheme = normalizeText(data.scheme);
    setStatus("");
  }

  async function loadLink() {
    const recordId = getRecordId();
    if (!recordId) {
      setError("好友链接参数缺失");
      return;
    }

    try {
      const apiBase = getApiBase();
      if (!apiBase) {
        setError("接口地址未配置");
        return;
      }
      const response = await fetch(`${apiBase}/sms/friend-link/${encodeURIComponent(recordId)}/data`, {
        method: "GET",
      });
      const contentType = response.headers.get("content-type") || "";
      if (!contentType.includes("application/json")) {
        setError("好友链接不存在或已失效");
        return;
      }
      const result = await response.json();
      if (!response.ok || !result.success || !result.data?.scheme) {
        setError(result.message || "好友链接不存在或已失效");
        return;
      }
      fillPage(result.data);
    } catch (error) {
      setError("好友链接加载失败，请稍后重试");
    }
  }

  elements.openButton.addEventListener("click", function () {
    if (!scheme) return;
    window.location.href = scheme;
  });

  loadLink();
})();