const { api } = require('./request');
let pending = null;
let cached = null;
let cachedAt = 0;
let user = null;
function address(value) {
  const text = String(value || '').trim();
  return /^-?\d+(\.\d+)?,\s*-?\d+(\.\d+)?$/.test(text) ? '' : text;
}
async function currentUserLocation() {
  const uid = wx.getStorageSync('userId');
  if (user !== uid) { user = uid; pending = null; cached = null; cachedAt = 0; }
  if (cached && Date.now() - cachedAt < 45000) return { ...cached };
  if (pending) return pending;
  const task = (async () => {
    let coords = { lat: 0, lng: 0 };
    try {
      if (wx.getFuzzyLocation) coords = await new Promise(resolve => wx.getFuzzyLocation({ type: 'gcj02', success: res => resolve({lat: res.latitude, lng: res.longitude}), fail: () => resolve(coords) }));
      const result = await api.updateIpLocation(coords);
      if (address(result && result.location)) return { ...coords, location: address(result.location) };
    } catch (error) {}
    try {
      const info = await api.coupleInfo();
      const me = [info.partner1, info.partner2].find(partner => partner && String(partner.id) === String(uid));
      return { ...coords, location: address(me && me.location) };
    } catch (error) { return { ...coords, location: '' }; }
  })();
  pending = task;
  try {
    const result = await task;
    if (user === uid && pending === task && result.location) { cached = result; cachedAt = Date.now(); }
    return result;
  } finally { if (pending === task) pending = null; }
}
module.exports = { currentUserLocation };