PhysiGo/app/lib/exercises/exercises_validation/models/exercise.dart

import '../../../navigation/utils/geometry_utils.dart';
import '../widgets/pose_detector.dart';

class Exercise {
  final int reps;
  final int series;
  final Criteria startMovement;
  final Criteria endMovement;

  const Exercise({
    required this.reps,
    required this.series,
    required this.startMovement,
    required this.endMovement,
  });

  bool isAtStartMovement(MeanFilteredData meanFilteredData) {
    return startMovement.isAtPosition(meanFilteredData);
  }

  bool isAtEndMovement(MeanFilteredData meanFilteredData) {
    return endMovement.isAtPosition(meanFilteredData);
  }
}

abstract class Criteria {
  bool isAtPosition(MeanFilteredData meanFilteredData);
}

class CriteriaDistance implements Criteria {
  final int jointStart;
  final int jointEnd;
  final int axis;
  final int threshold;

  const CriteriaDistance({
    required this.jointStart,
    required this.jointEnd,
    required this.axis,
    required this.threshold,
  });

  @override
  bool isAtPosition(MeanFilteredData meanFilteredData) {
    final landmarks = meanFilteredData.toList();
    final start = landmarks[jointStart][axis];
    final end = landmarks[jointEnd][axis];
    final distance = (start - end).abs();
    return distance < threshold;
  }
}

class CriteriaAngle implements Criteria {
  final int jointStart;
  final int jointCenter;
  final int jointEnd;
  final int threshold;

  const CriteriaAngle({
    required this.jointStart,
    required this.jointCenter,
    required this.jointEnd,
    required this.threshold,
  });

  @override
  bool isAtPosition(MeanFilteredData meanFilteredData) {
    final landmarks = meanFilteredData.toList();
    final start = Point3D(x: landmarks[jointStart][0], y: landmarks[jointStart][1], z: landmarks[jointStart][2]);
    final center = Point3D(x: landmarks[jointCenter][0], y: landmarks[jointCenter][1], z: landmarks[jointCenter][2]);
    final end = Point3D(x: landmarks[jointEnd][0], y: landmarks[jointEnd][1], z: landmarks[jointEnd][2]);
    final angle = DistanceUtils.angleBetweenThreePoints(start, center, end).round();
    return angle > threshold;
  }
}