import 'dart:async';

import 'package:flutter/material.dart';

import 'package:askiineverdie/src/core/notification/notification_service.dart';

/// 알림 오버레이 위젯 (Phase 8: 팝업/토스트 알림)
///
/// 화면 상단에 알림을 슬라이드 인/아웃 애니메이션으로 표시
class NotificationOverlay extends StatefulWidget {
  const NotificationOverlay({
    super.key,
    required this.notificationService,
    required this.child,
  });

  final NotificationService notificationService;
  final Widget child;

  @override
  State<NotificationOverlay> createState() => _NotificationOverlayState();
}

class _NotificationOverlayState extends State<NotificationOverlay>
    with SingleTickerProviderStateMixin {
  GameNotification? _currentNotification;
  late AnimationController _animationController;
  late Animation<Offset> _slideAnimation;
  late Animation<double> _fadeAnimation;

  StreamSubscription<GameNotification>? _notificationSub;
  StreamSubscription<void>? _dismissSub;

  @override
  void initState() {
    super.initState();

    _animationController = AnimationController(
      duration: const Duration(milliseconds: 300),
      vsync: this,
    );

    // 하단에서 슬라이드 인/아웃
    _slideAnimation = Tween<Offset>(begin: const Offset(0, 1), end: Offset.zero)
        .animate(
          CurvedAnimation(
            parent: _animationController,
            curve: Curves.easeOutBack,
          ),
        );

    _fadeAnimation = Tween<double>(begin: 0, end: 1).animate(
      CurvedAnimation(parent: _animationController, curve: Curves.easeIn),
    );

    _notificationSub = widget.notificationService.notifications.listen(
      _onNotification,
    );
    _dismissSub = widget.notificationService.dismissals.listen(_onDismiss);
  }

  void _onNotification(GameNotification notification) {
    setState(() => _currentNotification = notification);
    _animationController.forward();
  }

  void _onDismiss(void _) {
    _animationController.reverse().then((_) {
      if (mounted) {
        setState(() => _currentNotification = null);
      }
    });
  }

  @override
  void dispose() {
    _notificationSub?.cancel();
    _dismissSub?.cancel();
    _animationController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Stack(
      children: [
        widget.child,
        if (_currentNotification != null)
          Positioned(
            bottom: MediaQuery.of(context).padding.bottom + 80,
            left: 16,
            right: 16,
            child: SlideTransition(
              position: _slideAnimation,
              child: FadeTransition(
                opacity: _fadeAnimation,
                child: _NotificationCard(
                  notification: _currentNotification!,
                  onDismiss: widget.notificationService.dismiss,
                ),
              ),
            ),
          ),
      ],
    );
  }
}

/// 알림 카드 위젯
class _NotificationCard extends StatelessWidget {
  const _NotificationCard({
    required this.notification,
    required this.onDismiss,
  });

  final GameNotification notification;
  final VoidCallback onDismiss;

  @override
  Widget build(BuildContext context) {
    final (bgColor, icon, iconColor) = _getStyleForType(notification.type);

    return Material(
      elevation: 8,
      borderRadius: BorderRadius.circular(12),
      color: bgColor,
      child: InkWell(
        onTap: onDismiss,
        borderRadius: BorderRadius.circular(12),
        child: Container(
          padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
          child: Row(
            children: [
              // 아이콘
              Container(
                width: 40,
                height: 40,
                decoration: BoxDecoration(
                  color: iconColor.withValues(alpha: 0.2),
                  shape: BoxShape.circle,
                ),
                child: Icon(icon, color: iconColor, size: 24),
              ),
              const SizedBox(width: 12),
              // 텍스트
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    Text(
                      notification.title,
                      style: const TextStyle(
                        fontSize: 16,
                        fontWeight: FontWeight.bold,
                        color: Colors.white,
                      ),
                    ),
                    if (notification.subtitle != null) ...[
                      const SizedBox(height: 2),
                      Text(
                        notification.subtitle!,
                        style: TextStyle(
                          fontSize: 13,
                          color: Colors.white.withValues(alpha: 0.8),
                        ),
                      ),
                    ],
                  ],
                ),
              ),
              // 닫기 버튼
              IconButton(
                icon: const Icon(Icons.close, color: Colors.white70, size: 20),
                onPressed: onDismiss,
                padding: EdgeInsets.zero,
                constraints: const BoxConstraints(minWidth: 32, minHeight: 32),
              ),
            ],
          ),
        ),
      ),
    );
  }

  (Color, IconData, Color) _getStyleForType(NotificationType type) {
    return switch (type) {
      NotificationType.levelUp => (
        const Color(0xFF1565C0),
        Icons.trending_up,
        Colors.amber,
      ),
      NotificationType.questComplete => (
        const Color(0xFF2E7D32),
        Icons.check_circle,
        Colors.lightGreen,
      ),
      NotificationType.actComplete => (
        const Color(0xFF6A1B9A),
        Icons.flag,
        Colors.purpleAccent,
      ),
      NotificationType.newSpell => (
        const Color(0xFF4527A0),
        Icons.auto_fix_high,
        Colors.deepPurpleAccent,
      ),
      NotificationType.newEquipment => (
        const Color(0xFFE65100),
        Icons.shield,
        Colors.orange,
      ),
      NotificationType.bossDefeat => (
        const Color(0xFFC62828),
        Icons.whatshot,
        Colors.redAccent,
      ),
      NotificationType.gameSaved => (
        const Color(0xFF00695C),
        Icons.save,
        Colors.tealAccent,
      ),
      NotificationType.info => (
        const Color(0xFF0277BD),
        Icons.info_outline,
        Colors.lightBlueAccent,
      ),
      NotificationType.warning => (
        const Color(0xFFF57C00),
        Icons.warning_amber,
        Colors.amber,
      ),
    };
  }
}