import 'package:flutter/material.dart';
import '../models/subscription_model.dart';
import '../utils/haptic_feedback_helper.dart';
import 'subscription_card.dart';
import '../utils/reduce_motion.dart';

class SwipeableSubscriptionCard extends StatefulWidget {
  final SubscriptionModel subscription;
  final VoidCallback? onEdit;
  final Future<void> Function()? onDelete;
  final VoidCallback? onTap;
  final bool keepAlive;

  const SwipeableSubscriptionCard({
    super.key,
    required this.subscription,
    this.onEdit,
    this.onDelete,
    this.onTap,
    this.keepAlive = false,
  });

  @override
  State<SwipeableSubscriptionCard> createState() =>
      _SwipeableSubscriptionCardState();
}

class _SwipeableSubscriptionCardState extends State<SwipeableSubscriptionCard>
    with SingleTickerProviderStateMixin, AutomaticKeepAliveClientMixin {
  // 상수 정의
  static const double _tapTolerance = 20.0; // 탭 허용 범위
  static const double _actionThresholdPercent = 0.15;
  static const double _deleteThresholdPercent = 0.40;
  static const double _velocityThreshold = 800.0;
  // static const double _animationDuration = 300.0;

  // 애니메이션 관련
  late AnimationController _controller;
  late Animation<double> _animation;

  // 제스처 추적
  Offset? _startPosition;
  // 제스처 관련 보조 변수(간소화)

  // 상태 관리
  double _currentOffset = 0;
  bool _isSwipingLeft = false;
  bool _hapticTriggered = false;
  double _cardWidth = 0;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: ReduceMotion.platform()
          ? const Duration(milliseconds: 0)
          : const Duration(milliseconds: 300),
      vsync: this,
    );
    _animation = Tween<double>(
      begin: 0.0,
      end: 0.0,
    ).animate(CurvedAnimation(
      parent: _controller,
      curve: Curves.easeOutExpo,
    ));

    _controller.addListener(() {
      if (mounted) {
        setState(() {
          _currentOffset = _animation.value;
        });
      }
    });
  }

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    _cardWidth = MediaQuery.of(context).size.width - 32;
  }

  @override
  void didUpdateWidget(SwipeableSubscriptionCard oldWidget) {
    super.didUpdateWidget(oldWidget);
    if (oldWidget.subscription.id != widget.subscription.id) {
      _resetCard();
    }
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  // 제스처 핸들러
  void _handlePanStart(DragStartDetails details) {
    _startPosition = details.localPosition;
    _hapticTriggered = false;
    _controller.stop();
  }

  void _handlePanUpdate(DragUpdateDetails details) {
    final currentPosition = details.localPosition;
    final delta = currentPosition.dx - _startPosition!.dx;
    // 탭/스와이프 판별 거리는 외부에서 사용하지 않아 제거

    // 카드 이동
    setState(() {
      _currentOffset = delta;
      _isSwipingLeft = delta < 0;
    });

    // 햅틱 피드백
    _triggerHapticFeedback();
  }

  void _handlePanEnd(DragEndDetails details) {
    final velocity = details.velocity.pixelsPerSecond.dx;

    // 스와이프 처리만 수행 (탭은 SubscriptionCard에서 처리)
    _processSwipe(velocity);
  }

  // 헬퍼 메서드
  // 탭 처리는 SubscriptionCard에서 수행

  void _processSwipe(double velocity) {
    final extent = _currentOffset.abs();
    final deleteThreshold = _cardWidth * _deleteThresholdPercent;

    // 아주 작은 움직임은 무시하고 원위치로 복귀
    if (extent < _tapTolerance) {
      _animateToOffset(0);
      return;
    }

    if (extent > deleteThreshold || velocity.abs() > _velocityThreshold) {
      // 삭제 실행
      if (widget.onDelete != null) {
        HapticFeedbackHelper.success();
        widget.onDelete!().then((_) {
          if (mounted) {
            _animateToOffset(0);
          }
        });
      } else {
        _animateToOffset(0);
      }
    } else {
      // 원위치 복귀
      _animateToOffset(0);
    }
  }

  void _triggerHapticFeedback() {
    final actionThreshold = _cardWidth * _actionThresholdPercent;
    final deleteThreshold = _cardWidth * _deleteThresholdPercent;
    final absOffset = _currentOffset.abs();

    if (!_hapticTriggered && absOffset > actionThreshold) {
      _hapticTriggered = true;
      HapticFeedbackHelper.mediumImpact();
    } else if (_hapticTriggered && absOffset > deleteThreshold) {
      HapticFeedbackHelper.heavyImpact();
      _hapticTriggered = false;
    }
  }

  void _animateToOffset(double offset) {
    _animation = Tween<double>(
      begin: _currentOffset,
      end: offset,
    ).animate(CurvedAnimation(
      parent: _controller,
      curve: Curves.easeOutExpo,
    ));

    _controller.forward(from: 0);
  }

  void _resetCard() {
    _controller.stop();
    setState(() {
      _currentOffset = 0;
    });
  }

  // 빌드 메서드
  Widget _buildActionButtons() {
    return Positioned.fill(
      child: IgnorePointer(
        child: Container(
          margin: const EdgeInsets.symmetric(vertical: 8, horizontal: 16),
          decoration: BoxDecoration(
            borderRadius: BorderRadius.circular(16),
            color: Colors.transparent,
          ),
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceBetween,
            children: [
              if (!_isSwipingLeft) _buildDeleteIcon(true),
              if (_isSwipingLeft) _buildDeleteIcon(false),
            ],
          ),
        ),
      ),
    );
  }

  Widget _buildDeleteIcon(bool isLeft) {
    final showIcon = _currentOffset.abs() > (_cardWidth * 0.10);
    final isDeleteThreshold =
        _currentOffset.abs() > (_cardWidth * _deleteThresholdPercent);

    return Padding(
      padding: EdgeInsets.only(
        left: isLeft ? 24 : 0,
        right: isLeft ? 0 : 24,
      ),
      child: AnimatedOpacity(
        duration: ReduceMotion.platform()
            ? const Duration(milliseconds: 0)
            : const Duration(milliseconds: 200),
        opacity: showIcon ? 1.0 : 0.0,
        child: AnimatedScale(
          duration: ReduceMotion.platform()
              ? const Duration(milliseconds: 0)
              : const Duration(milliseconds: 200),
          scale: showIcon ? 1.0 : 0.5,
          child: Icon(
            isDeleteThreshold
                ? Icons.delete_forever_rounded
                : Icons.delete_rounded,
            color: Colors.white,
            size: 28,
          ),
        ),
      ),
    );
  }

  Widget _buildCard() {
    return Transform.translate(
      offset: Offset(_currentOffset, 0),
      child: Transform.scale(
        scale:
            ReduceMotion.platform() ? 1.0 : 1.0 - (_currentOffset.abs() / 2000),
        child: Transform.rotate(
          angle: ReduceMotion.platform() ? 0.0 : _currentOffset / 2000,
          child: SubscriptionCard(
            subscription: widget.subscription,
            onTap: widget
                .onTap, // onTap 콜백을 전달하여 SubscriptionCard 내부에서도 탭 처리 가능하도록 함
          ),
        ),
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    // 웹과 모바일 모두 동일한 스와이프 기능 제공
    return Stack(
      children: [
        _buildActionButtons(),
        GestureDetector(
          behavior: HitTestBehavior.opaque,
          onPanStart: _handlePanStart,
          onPanUpdate: _handlePanUpdate,
          onPanEnd: _handlePanEnd,
          // onTap 제거 - SubscriptionCard의 AnimatedGlassmorphismCard에서 처리하도록 함
          child: _buildCard(),
        ),
      ],
    );
  }

  @override
  bool get wantKeepAlive => widget.keepAlive;
}