/// 멤버 화면 (MVCS의 View 레이어)
///
/// 웹과 동일한 2열 그리드 + 모달 디자인
library;

import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:url_launcher/url_launcher.dart';
import 'package:go_router/go_router.dart';
import '../../core/constants.dart';
import '../../models/member.dart';
import '../../controllers/members_controller.dart';

class MembersView extends ConsumerStatefulWidget {
  const MembersView({super.key});

  @override
  ConsumerState<MembersView> createState() => _MembersViewState();
}

class _MembersViewState extends ConsumerState<MembersView> {
  String? _previousPath;
  // 탭 전환 시 애니메이션 재생을 위한 키
  Key _gridKey = UniqueKey();

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    final currentPath = GoRouterState.of(context).uri.path;
    if (_previousPath != null && _previousPath != currentPath && currentPath == '/members') {
      setState(() => _gridKey = UniqueKey());
    }
    _previousPath = currentPath;
  }

  /// 인스타그램 열기 (딥링크 우선, 없으면 웹)
  Future<void> _openInstagram(String? url) async {
    if (url == null) return;

    String? username;
    final uri = Uri.tryParse(url);
    if (uri != null && uri.pathSegments.isNotEmpty) {
      username = uri.pathSegments.first;
    }

    if (username != null) {
      final deepLink = Uri.parse('instagram://user?username=$username');
      if (await canLaunchUrl(deepLink)) {
        await launchUrl(deepLink);
        return;
      }
    }

    final webUri = Uri.parse(url);
    if (await canLaunchUrl(webUri)) {
      await launchUrl(webUri, mode: LaunchMode.externalApplication);
    }
  }

  /// 멤버 모달 표시
  void _showMemberModal(Member member) {
    final controller = ref.read(membersProvider.notifier);
    final age = controller.calculateAge(member.birthDate);

    showGeneralDialog(
      context: context,
      barrierDismissible: true,
      barrierLabel: '닫기',
      barrierColor: Colors.black.withValues(alpha: 0.6),
      transitionDuration: const Duration(milliseconds: 200),
      pageBuilder: (context, animation, secondaryAnimation) {
        return Center(
          child: ScaleTransition(
            scale: CurvedAnimation(
              parent: animation,
              curve: Curves.easeOutCubic,
            ),
            child: FadeTransition(
              opacity: animation,
              child: Material(
                color: Colors.transparent,
                child: Container(
                  width: 264,
                  decoration: BoxDecoration(
                    color: Colors.white,
                    borderRadius: BorderRadius.circular(16),
                  ),
                  clipBehavior: Clip.antiAlias,
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      // 이미지 (3:4 비율)
                      AspectRatio(
                        aspectRatio: 3 / 4,
                        child: Stack(
                          fit: StackFit.expand,
                          children: [
                            if (member.imageUrl != null)
                              CachedNetworkImage(
                                imageUrl: member.imageUrl!,
                                fit: BoxFit.cover,
                                placeholder: (context, url) => Container(color: Colors.grey[200]),
                              )
                            else
                              Container(
                                color: Colors.grey[200],
                                child: Center(
                                  child: Text(
                                    member.name[0],
                                    style: TextStyle(
                                      fontSize: 30,
                                      fontWeight: FontWeight.bold,
                                      color: Colors.grey[400],
                                    ),
                                  ),
                                ),
                              ),
                            // 닫기 버튼
                            Positioned(
                              top: 8,
                              right: 8,
                              child: GestureDetector(
                                onTap: () => Navigator.of(context).pop(),
                                child: Container(
                                  width: 32,
                                  height: 32,
                                  decoration: BoxDecoration(
                                    color: Colors.black.withValues(alpha: 0.5),
                                    shape: BoxShape.circle,
                                  ),
                                  child: const Icon(
                                    Icons.close,
                                    color: Colors.white,
                                    size: 18,
                                  ),
                                ),
                              ),
                            ),
                          ],
                        ),
                      ),
                      // 정보 영역
                      Padding(
                        padding: const EdgeInsets.all(16),
                        child: Column(
                          children: [
                            // 이름
                            Text(
                              member.name,
                              style: const TextStyle(
                                fontSize: 18,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            // 생일
                            if (member.birthDate != null) ...[
                              const SizedBox(height: 6),
                              Row(
                                mainAxisAlignment: MainAxisAlignment.center,
                                children: [
                                  _buildIcon('cake', 14, Colors.grey[500]!),
                                  const SizedBox(width: 4),
                                  Text(
                                    controller.formatBirthDate(member.birthDate),
                                    style: TextStyle(
                                      fontSize: 14,
                                      color: Colors.grey[500],
                                    ),
                                  ),
                                  if (age != null) ...[
                                    const SizedBox(width: 4),
                                    Text(
                                      '($age세)',
                                      style: const TextStyle(
                                        fontSize: 14,
                                        color: AppColors.primary,
                                      ),
                                    ),
                                  ],
                                ],
                              ),
                            ],
                            // 인스타그램 버튼
                            if (!member.isFormer && member.instagram != null) ...[
                              const SizedBox(height: 12),
                              GestureDetector(
                                onTap: () => _openInstagram(member.instagram),
                                child: Container(
                                  width: double.infinity,
                                  padding: const EdgeInsets.symmetric(vertical: 10),
                                  decoration: BoxDecoration(
                                    gradient: const LinearGradient(
                                      colors: [Color(0xFF833AB4), Color(0xFFE1306C), Color(0xFFF77737)],
                                    ),
                                    borderRadius: BorderRadius.circular(12),
                                  ),
                                  child: Row(
                                    mainAxisAlignment: MainAxisAlignment.center,
                                    children: [
                                      _buildIcon('instagram', 16, Colors.white),
                                      const SizedBox(width: 6),
                                      const Text(
                                        'Instagram',
                                        style: TextStyle(
                                          color: Colors.white,
                                          fontSize: 14,
                                          fontWeight: FontWeight.w500,
                                        ),
                                      ),
                                    ],
                                  ),
                                ),
                              ),
                            ],
                          ],
                        ),
                      ),
                    ],
                  ),
                ),
              ),
            ),
          ),
        );
      },
    );
  }

  @override
  Widget build(BuildContext context) {
    final membersState = ref.watch(membersProvider);

    if (membersState.isLoading) {
      return const Center(
        child: CircularProgressIndicator(color: AppColors.primary),
      );
    }

    if (membersState.members.isEmpty) {
      return const Center(
        child: Text('멤버 정보가 없습니다', style: TextStyle(color: AppColors.textSecondary)),
      );
    }

    // 현재 멤버만 표시
    final currentMembers = membersState.members.where((m) => !m.isFormer).toList();

    return Container(
      color: const Color(0xFFF9FAFB), // bg-gray-50
      child: GridView.builder(
        key: _gridKey,
        padding: const EdgeInsets.all(16),
        gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
          crossAxisCount: 2,
          crossAxisSpacing: 16,
          mainAxisSpacing: 16,
          childAspectRatio: 3 / 4,
        ),
        itemCount: currentMembers.length,
        itemBuilder: (context, index) {
          return _AnimatedMemberCard(
            index: index,
            member: currentMembers[index],
            onTap: () => _showMemberModal(currentMembers[index]),
          );
        },
      ),
    );
  }

  /// SVG 아이콘 빌더
  Widget _buildIcon(String name, double size, Color color) {
    const icons = {
      'cake': '<path d="M20 21v-8a2 2 0 0 0-2-2H6a2 2 0 0 0-2 2v8"/><path d="M4 16s.5-1 2-1 2.5 2 4 2 2.5-2 4-2 2.5 2 4 2 2-1 2-1"/><path d="M2 21h20"/><path d="M7 8v3"/><path d="M12 8v3"/><path d="M17 8v3"/><path d="M7 4h.01"/><path d="M12 4h.01"/><path d="M17 4h.01"/>',
      'instagram': '<rect width="20" height="20" x="2" y="2" rx="5" ry="5"/><path d="M16 11.37A4 4 0 1 1 12.63 8 4 4 0 0 1 16 11.37z"/><line x1="17.5" x2="17.51" y1="6.5" y2="6.5"/>',
    };

    final svg =
        '''<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">${icons[name]}</svg>''';

    return SizedBox(
      width: size,
      height: size,
      child: SvgPicture.string(
        svg,
        colorFilter: ColorFilter.mode(color, BlendMode.srcIn),
      ),
    );
  }
}

/// 개별 애니메이션이 적용된 멤버 카드
/// Framer Motion과 동일: delay index*50ms, opacity 0→1, y 20→0, tap scale 0.97
class _AnimatedMemberCard extends StatefulWidget {
  final int index;
  final Member member;
  final VoidCallback onTap;

  const _AnimatedMemberCard({
    required this.index,
    required this.member,
    required this.onTap,
  });

  @override
  State<_AnimatedMemberCard> createState() => _AnimatedMemberCardState();
}

class _AnimatedMemberCardState extends State<_AnimatedMemberCard>
    with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _opacity;
  late Animation<Offset> _slide;
  double _scale = 1.0;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      vsync: this,
      duration: const Duration(milliseconds: 300),
    );
    _opacity = Tween<double>(begin: 0, end: 1).animate(
      CurvedAnimation(parent: _controller, curve: Curves.easeOut),
    );
    _slide = Tween<Offset>(begin: const Offset(0, 20), end: Offset.zero).animate(
      CurvedAnimation(parent: _controller, curve: Curves.easeOut),
    );

    // 개별 딜레이 (index * 50ms)
    Future.delayed(Duration(milliseconds: widget.index * 50), () {
      if (mounted) _controller.forward();
    });
  }

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

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _controller,
      builder: (context, child) {
        return Opacity(
          opacity: _opacity.value,
          child: Transform.translate(
            offset: _slide.value,
            child: child,
          ),
        );
      },
      child: GestureDetector(
        onTapDown: (_) => setState(() => _scale = 0.97),
        onTapUp: (_) {
          setState(() => _scale = 1.0);
          widget.onTap();
        },
        onTapCancel: () => setState(() => _scale = 1.0),
        child: AnimatedScale(
          scale: _scale,
          duration: const Duration(milliseconds: 100),
          child: Container(
            decoration: BoxDecoration(
              borderRadius: BorderRadius.circular(16),
              boxShadow: [
                BoxShadow(
                  color: Colors.black.withValues(alpha: 0.1),
                  blurRadius: 10,
                  offset: const Offset(0, 4),
                ),
              ],
            ),
            child: ClipRRect(
              borderRadius: BorderRadius.circular(16),
              child: Stack(
                fit: StackFit.expand,
                children: [
                  // 이미지
                  if (widget.member.imageUrl != null)
                    CachedNetworkImage(
                      imageUrl: widget.member.imageUrl!,
                      fit: BoxFit.cover,
                      placeholder: (context, url) => Container(color: Colors.grey[200]),
                    )
                  else
                    Container(
                      decoration: BoxDecoration(
                        gradient: LinearGradient(
                          begin: Alignment.topLeft,
                          end: Alignment.bottomRight,
                          colors: [Colors.grey[200]!, Colors.grey[300]!],
                        ),
                      ),
                      child: Center(
                        child: Text(
                          widget.member.name[0],
                          style: TextStyle(
                            fontSize: 36,
                            fontWeight: FontWeight.bold,
                            color: Colors.grey[400],
                          ),
                        ),
                      ),
                    ),
                  // 하단 그라데이션 + 이름
                  Positioned(
                    left: 0,
                    right: 0,
                    bottom: 0,
                    child: Container(
                      padding: const EdgeInsets.all(12),
                      decoration: BoxDecoration(
                        gradient: LinearGradient(
                          begin: Alignment.topCenter,
                          end: Alignment.bottomCenter,
                          colors: [
                            Colors.transparent,
                            Colors.black.withValues(alpha: 0.45),
                          ],
                        ),
                      ),
                      child: Text(
                        widget.member.name,
                        textAlign: TextAlign.center,
                        style: const TextStyle(
                          color: Colors.white,
                          fontSize: 18,
                          fontWeight: FontWeight.bold,
                        ),
                      ),
                    ),
                  ),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }
}