location2025/plugins/map/lib/src/entity/poi_search_bound.dart

import '../../flutter_map.dart';

class PoiSearchBound {
  final LatLng? center; // 圆形范围中心点
  final int? radius; // 半径（米）
  final List<LatLng>? points; // 多边形点集

  /// 圆形范围构造
  PoiSearchBound.circle({
    required this.center,
    required this.radius,
  }) : points = null;

  /// 多边形范围构造
  PoiSearchBound.polygon({
    required this.points,
  })  : center = null,
        radius = null;

  /// 转 Map，用于传给 MethodChannel
  Map<String, dynamic> toJson() {
    if (center != null && radius != null) {
      return {
        'type': 'circle',
        'center': center!.toJson(),
        'radius': radius,
      };
    } else if (points != null) {
      return {
        'type': 'polygon',
        'points': points!.map((e) => e.toJson()).toList(),
      };
    }
    throw Exception('Invalid PoiSearchBound: 必须是 circle 或 polygon');
  }
}