import 'package:flutter_test/flutter_test.dart';

import 'package:bully/data/models/shot.dart';
import 'package:bully/services/grouping_analyzer_service.dart';

Shot _shot(String id, double x, double y) =>
    Shot(id: id, x: x, y: y, score: 0, analysisId: '');

void main() {
  final service = GroupingAnalyzerService();

  group('analyzeGrouping', () {
    test('liste vide → résultat vide', () {
      final result = service.analyzeGrouping([]);
      expect(result.shotCount, 0);
      expect(result.diameter, 0);
    });

    test('un seul tir → diamètre nul, centre sur le tir', () {
      final result = service.analyzeGrouping([_shot('a', 0.3, 0.7)]);
      expect(result.shotCount, 1);
      expect(result.centerX, 0.3);
      expect(result.centerY, 0.7);
      expect(result.diameter, 0);
    });

    test('deux tirs → centroïde au milieu et diamètre = écart', () {
      final result = service.analyzeGrouping([
        _shot('a', 0.4, 0.5),
        _shot('b', 0.6, 0.5),
      ]);

      expect(result.centerX, closeTo(0.5, 1e-9));
      expect(result.centerY, closeTo(0.5, 1e-9));
      expect(result.diameter, closeTo(0.2, 1e-9));
      expect(result.meanRadius, closeTo(0.1, 1e-9));
      // Deux tirs équidistants du centroïde → dispersion nulle.
      expect(result.standardDeviation, closeTo(0.0, 1e-9));
    });

    test('le diamètre est la plus grande distance entre deux tirs', () {
      final result = service.analyzeGrouping([
        _shot('a', 0.2, 0.5),
        _shot('b', 0.5, 0.5),
        _shot('c', 0.8, 0.5),
      ]);
      expect(result.diameter, closeTo(0.6, 1e-9));
    });
  });

  group('getOffsetDescription', () {
    test('décalage négligeable → Centre', () {
      expect(service.getOffsetDescription(0.01, -0.01), 'Centre');
    });

    test('décalage combiné → direction composée', () {
      expect(service.getOffsetDescription(0.1, -0.1), 'Haut-Droite');
    });
  });
}