// Flutter imports:
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';

///
/// Направления свайпов
///
enum SwipeDirection {
  ///
  /// Свайп вниз
  ///
  DOWN,

  ///
  /// Свайп вверх
  ///
  UP,
}

class SwipeGesture extends StatelessWidget {
  ///
  /// Отслеживание свайпа по виджету
  ///
  const SwipeGesture({
    required this.swipe,
    required this.onSwipe,
    required this.child,
    super.key,
  });

  /// Направление движения
  final SwipeDirection swipe;

  /// Обработка свайпа
  final VoidCallback onSwipe;

  /// Потомок
  final Widget child;

  void _onVerticalDragUpdate(DragUpdateDetails e) {
    const int sensitivity = 3;

    switch (swipe) {
      case SwipeDirection.DOWN:
        if (e.delta.dy > sensitivity) {
          onSwipe();
        }

        break;
      case SwipeDirection.UP:
        if (e.delta.dy < sensitivity) {
          onSwipe();
        }

        break;
    }
  }

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      dragStartBehavior: DragStartBehavior.start,
      behavior: HitTestBehavior.opaque,
      onVerticalDragUpdate: _onVerticalDragUpdate,
      child: child,
    );
  }
}