export type TencentPickedLocation = {
  latitude: number;
  longitude: number;
  address?: string;
  name?: string;
  cityname?: string;
};

type LocPickerMessage = {
  module?: string;
  latlng?: { lat?: number; lng?: number };
  poiaddress?: string;
  poiname?: string;
  cityname?: string;
};

const REFERER = 'dukang-haoke';

export function buildTencentLocPickerUrl(
  key: string,
  options?: { latitude?: number; longitude?: number },
): string {
  const params = new URLSearchParams({
    search: '1',
    type: '1',
    key,
    referer: REFERER,
    policy: '1',
  });
  const lat = options?.latitude;
  const lng = options?.longitude;
  if (
    lat != null &&
    lng != null &&
    Number.isFinite(lat) &&
    Number.isFinite(lng) &&
    !(lat === 0 && lng === 0)
  ) {
    params.set('coord', `${lat},${lng}`);
    params.set('coordtype', '5');
  }
  return `https://apis.map.qq.com/tools/locpicker?${params.toString()}`;
}

export function parseTencentLocPickerMessage(data: unknown): TencentPickedLocation | null {
  const loc = data as LocPickerMessage;
  if (!loc || loc.module !== 'locationPicker') return null;
  const lat = Number(loc.latlng?.lat);
  const lng = Number(loc.latlng?.lng);
  if (!Number.isFinite(lat) || !Number.isFinite(lng)) return null;
  // 列表滑动过程中偶发空 POI，忽略无名称且无地址的噪声
  if (!loc.poiname && !loc.poiaddress) return null;
  return {
    latitude: lat,
    longitude: lng,
    address: loc.poiaddress?.trim() || undefined,
    name: loc.poiname?.trim() || undefined,
    cityname: loc.cityname?.trim() || undefined,
  };
}