// 微信绑定 modal(ClawBot 扫码,DESIGN §8.7):扫码绑定 + 自检发送 + 解绑。
// 左侧 rail「微信」按钮触发。后端:POST /v1/wechat/bind/qrcode、GET /v1/wechat/bind/status、
//   GET /v1/wechat/bind、DELETE /v1/wechat/bind、POST /v1/wechat/test。
import { $ } from "./dom.js";
import { api } from "./api.js";

let _polling = false;
const sleep = (ms) => new Promise((r) => setTimeout(r, ms));

function setState(cls, msg) {
  const el = $("wx-state");
  el.className = "wx-status " + cls;
  el.textContent = msg;
}

async function refresh() {
  try {
    const b = await api("GET", "/v1/wechat/bind");
    if (b.bound) {
      const push = b.can_push ? "可主动推送" : "需在微信里发条消息以开启主动推送";
      setState("ok", "已绑定" + (b.user_im_id ? "" : "(待首次开口)") + " · " + push);
      $("wx-test").disabled = false;
      $("wx-unbind").disabled = false;
    } else {
      setState("wait", "尚未绑定。点「绑定」生成二维码,用手机微信扫。");
      $("wx-test").disabled = true;
      $("wx-unbind").disabled = true;
    }
  } catch (e) {
    setState("err", "查询失败: " + e.message +
      "(确认已上 migration 0012 + 开 ZCBOT_WECHAT_BOT_ENABLED)");
    $("wx-test").disabled = true;
    $("wx-unbind").disabled = true;
  }
}

function openWechatModal() {
  $("wechat-modal").classList.add("show");
  $("wx-qrbox").hidden = true;
  refresh();
}
export function closeWechatModal() {
  _polling = false;
  $("wechat-modal").classList.remove("show");
}

async function bindFlow() {
  if (_polling) return;
  _polling = true;
  $("wx-bind").disabled = true;
  try {
    while (_polling) {                                   // 二维码过期自动换新
      const q = await api("POST", "/v1/wechat/bind/qrcode");
      $("wx-qrimg").src = q.qr_png;
      $("wx-qrbox").hidden = false;
      setState("wait", "等待扫码…(二维码约 1 分钟过期,会自动换新)");
      let expired = false;
      while (_polling && !expired) {
        let s;
        try {
          s = await api("GET", "/v1/wechat/bind/status?qrcode_id=" +
            encodeURIComponent(q.qrcode_id));
        } catch (e) { await sleep(2000); continue; }
        if (s.status === "confirmed") {
          _polling = false;
          $("wx-qrbox").hidden = true;
          setState("ok", "绑定成功!去微信「微信 ClawBot」发句话试试。");
          await refresh();
          return;
        }
        if (s.status === "expired") { expired = true; break; }
        await sleep(1000);
      }
    }
  } catch (e) {
    setState("err", "绑定出错: " + e.message);
  } finally {
    _polling = false;
    $("wx-bind").disabled = false;
  }
}

// ───── 顶层绑定 ─────
$("hd-wechat").onclick = openWechatModal;
$("wx-close").onclick = closeWechatModal;
$("wechat-modal").addEventListener("click", (e) => {
  if (e.target.id === "wechat-modal") closeWechatModal(); // 点遮罩关闭
});
$("wx-bind").onclick = bindFlow;
$("wx-unbind").onclick = async () => {
  _polling = false;
  if (!confirm("确定解绑微信?")) return;
  try {
    await api("DELETE", "/v1/wechat/bind");
    $("wx-qrbox").hidden = true;
    await refresh();
  } catch (e) { setState("err", "解绑失败: " + e.message); }
};
$("wx-test").onclick = async () => {
  $("wx-test").disabled = true;
  try {
    const r = await api("POST", "/v1/wechat/test");
    if (r.ok) setState("ok", "测试消息已发送,去微信查收。");
    else setState("err", "推送未送达(" + r.reason +
      ")。多半是超 24h 没在微信互动:发条消息再试。");
  } catch (e) {
    setState("err", "测试失败: " + e.message);
  } finally { $("wx-test").disabled = false; }
};