class DetectionResult {
  final String label;
  final double score;
  final double left;
  final double top;
  final double right;
  final double bottom;

  /// 轨迹已确认（多帧稳定/高分/活动确认），false = 候选，渲染为虚线
  final bool confirmed;

  /// 类别索引：单物种模型 0 = 目标物种、1 = suspect；综合模型 0..N-1 = 各物种、
  /// 末位 = suspect。仅作展示索引，类别语义看 label 文本（2026-09-09 综合模型）
  final int classId;

  /// 产出该框的模型（数据集 id 与名称；无来源为 -1/空）
  final int modelId;
  final String modelName;

  const DetectionResult({
    required this.label,
    required this.score,
    required this.left,
    required this.top,
    required this.right,
    required this.bottom,
    this.confirmed = true,
    this.classId = -1,
    this.modelId = -1,
    this.modelName = '',
  });

  double get width => right - left;
  double get height => bottom - top;
  double get centerX => (left + right) / 2;
  double get centerY => (top + bottom) / 2;

  /// 疑似（生境预警）类别：训练标签为 suspect。单物种模型 suspect 在索引 1，
  /// 综合模型在末位——统一按标签名判定，不能按 classId>0（综合模型其他物种
  /// 索引也 >0，2026-09-09）
  bool get isSuspect => label == 'suspect';

  DetectionResult copyWith({
    double? score,
    double? left,
    double? top,
    double? right,
    double? bottom,
    bool? confirmed,
  }) =>
      DetectionResult(
        label: label,
        score: score ?? this.score,
        left: left ?? this.left,
        top: top ?? this.top,
        right: right ?? this.right,
        bottom: bottom ?? this.bottom,
        confirmed: confirmed ?? this.confirmed,
        classId: classId,
        modelId: modelId,
        modelName: modelName,
      );
}

class MotionRegion {
  final double left;
  final double top;
  final double right;
  final double bottom;

  const MotionRegion(this.left, this.top, this.right, this.bottom);

  double get centerX => (left + right) / 2;
  double get centerY => (top + bottom) / 2;
}