import 'package:flutter/material.dart';
import 'package:flutter/foundation.dart' show kIsWeb;
import 'package:provider/provider.dart';
import '../providers/app_lock_provider.dart';
import '../providers/notification_provider.dart';
import '../providers/subscription_provider.dart';
import 'package:share_plus/share_plus.dart';
import 'package:path_provider/path_provider.dart';
import 'dart:io';
import 'package:path/path.dart' as path;
import '../services/notification_service.dart';
import '../screens/sms_scan_screen.dart';
import 'package:url_launcher/url_launcher.dart';

class SettingsScreen extends StatelessWidget {
  const SettingsScreen({super.key});

  // 알림 시점 라디오 버튼 생성 헬퍼 메서드
  Widget _buildReminderDayRadio(BuildContext context,
      NotificationProvider provider, int value, String label) {
    final isSelected = provider.reminderDays == value;
    return Expanded(
      child: InkWell(
        onTap: () => provider.setReminderDays(value),
        child: Container(
          margin: const EdgeInsets.symmetric(horizontal: 4),
          padding: const EdgeInsets.symmetric(vertical: 10),
          decoration: BoxDecoration(
            color: isSelected
                ? Theme.of(context).colorScheme.primary.withOpacity(0.2)
                : Colors.transparent,
            borderRadius: BorderRadius.circular(8),
            border: Border.all(
              color: isSelected
                  ? Theme.of(context).colorScheme.primary
                  : Theme.of(context).colorScheme.outline.withOpacity(0.5),
              width: isSelected ? 2 : 1,
            ),
          ),
          child: Column(
            mainAxisSize: MainAxisSize.min,
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Icon(
                isSelected
                    ? Icons.radio_button_checked
                    : Icons.radio_button_unchecked,
                color: isSelected
                    ? Theme.of(context).colorScheme.primary
                    : Theme.of(context).colorScheme.outline,
                size: 24,
              ),
              const SizedBox(height: 6),
              Text(
                label,
                style: TextStyle(
                  fontSize: 14,
                  fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
                  color: isSelected
                      ? Theme.of(context).colorScheme.primary
                      : Theme.of(context).colorScheme.onSurface,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _backupData(BuildContext context) async {
    try {
      final provider = context.read<SubscriptionProvider>();
      final subscriptions = provider.subscriptions;

      // 임시 디렉토리에 백업 파일 생성
      final tempDir = await getTemporaryDirectory();
      final backupFile =
          File(path.join(tempDir.path, 'submanager_backup.json'));

      // 구독 데이터를 JSON 형식으로 저장
      final jsonData = subscriptions
          .map((sub) => {
                'id': sub.id,
                'serviceName': sub.serviceName,
                'monthlyCost': sub.monthlyCost,
                'billingCycle': sub.billingCycle,
                'nextBillingDate': sub.nextBillingDate.toIso8601String(),
                'isAutoDetected': sub.isAutoDetected,
                'repeatCount': sub.repeatCount,
                'lastPaymentDate': sub.lastPaymentDate?.toIso8601String(),
              })
          .toList();

      await backupFile.writeAsString(jsonData.toString());

      // 파일 공유
      await Share.shareXFiles(
        [XFile(backupFile.path)],
        text: 'SubManager 백업 파일',
      );

      if (context.mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          const SnackBar(content: Text('백업 파일이 생성되었습니다')),
        );
      }
    } catch (e) {
      if (context.mounted) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('백업 중 오류가 발생했습니다: $e')),
        );
      }
    }
  }

  // SMS 스캔 화면으로 이동
  void _navigateToSmsScan(BuildContext context) async {
    final added = await Navigator.push<bool>(
      context,
      MaterialPageRoute(builder: (context) => const SmsScanScreen()),
    );

    if (added == true && context.mounted) {
      ScaffoldMessenger.of(context).showSnackBar(
        const SnackBar(content: Text('구독이 성공적으로 추가되었습니다')),
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('설정'),
      ),
      body: ListView(
        children: [
          // 앱 잠금 설정 UI 숨김
          // Card(
          //   margin: const EdgeInsets.all(16),
          //   child: Consumer<AppLockProvider>(
          //     builder: (context, provider, child) {
          //       return SwitchListTile(
          //         title: const Text('앱 잠금'),
          //         subtitle: const Text('생체 인증으로 앱 잠금'),
          //         value: provider.isEnabled,
          //         onChanged: (value) async {
          //           if (value) {
          //             final isAuthenticated = await provider.authenticate();
          //             if (isAuthenticated) {
          //               provider.enable();
          //             }
          //           } else {
          //             provider.disable();
          //           }
          //         },
          //       );
          //     },
          //   ),
          // ),

          // 알림 설정
          Card(
            margin: const EdgeInsets.symmetric(horizontal: 16),
            child: Consumer<NotificationProvider>(
              builder: (context, provider, child) {
                return Column(
                  children: [
                    ListTile(
                      title: const Text('알림 권한'),
                      subtitle: const Text('알림을 받으려면 권한이 필요합니다'),
                      trailing: ElevatedButton(
                        onPressed: () async {
                          final granted =
                              await NotificationService.requestPermission();
                          if (granted) {
                            provider.setEnabled(true);
                          } else {
                            ScaffoldMessenger.of(context).showSnackBar(
                              const SnackBar(
                                content: Text('알림 권한이 거부되었습니다'),
                              ),
                            );
                          }
                        },
                        child: const Text('권한 요청'),
                      ),
                    ),
                    const Divider(),
                    // 결제 예정 알림 기본 스위치
                    SwitchListTile(
                      title: const Text('결제 예정 알림'),
                      subtitle: const Text('결제 예정일 알림 받기'),
                      value: provider.isPaymentEnabled,
                      onChanged: (value) {
                        provider.setPaymentEnabled(value);
                      },
                    ),

                    // 알림 세부 설정 (알림 활성화된 경우에만 표시)
                    AnimatedSize(
                      duration: const Duration(milliseconds: 300),
                      curve: Curves.easeInOut,
                      child: provider.isPaymentEnabled
                          ? Padding(
                              padding: const EdgeInsets.only(
                                  left: 16.0, right: 16.0, bottom: 8.0),
                              child: Card(
                                elevation: 0,
                                color: Theme.of(context)
                                    .colorScheme
                                    .surfaceVariant
                                    .withOpacity(0.3),
                                shape: RoundedRectangleBorder(
                                  borderRadius: BorderRadius.circular(12),
                                ),
                                child: Padding(
                                  padding: const EdgeInsets.all(12.0),
                                  child: Column(
                                    crossAxisAlignment:
                                        CrossAxisAlignment.start,
                                    children: [
                                      // 알림 시점 선택 (1일전, 2일전, 3일전)
                                      const Text('알림 시점',
                                          style: TextStyle(
                                              fontWeight: FontWeight.bold)),
                                      const SizedBox(height: 8),
                                      Padding(
                                        padding: const EdgeInsets.symmetric(
                                            vertical: 8.0),
                                        child: Row(
                                          mainAxisAlignment:
                                              MainAxisAlignment.spaceEvenly,
                                          children: [
                                            _buildReminderDayRadio(
                                                context, provider, 1, '1일 전'),
                                            _buildReminderDayRadio(
                                                context, provider, 2, '2일 전'),
                                            _buildReminderDayRadio(
                                                context, provider, 3, '3일 전'),
                                          ],
                                        ),
                                      ),

                                      const SizedBox(height: 16),

                                      // 알림 시간 선택
                                      const Text('알림 시간',
                                          style: TextStyle(
                                              fontWeight: FontWeight.bold)),
                                      const SizedBox(height: 12),
                                      InkWell(
                                        onTap: () async {
                                          final TimeOfDay? picked =
                                              await showTimePicker(
                                            context: context,
                                            initialTime: TimeOfDay(
                                                hour: provider.reminderHour,
                                                minute:
                                                    provider.reminderMinute),
                                          );
                                          if (picked != null) {
                                            provider.setReminderTime(
                                                picked.hour, picked.minute);
                                          }
                                        },
                                        child: Container(
                                          padding: const EdgeInsets.symmetric(
                                              vertical: 12, horizontal: 16),
                                          decoration: BoxDecoration(
                                            border: Border.all(
                                              color: Theme.of(context)
                                                  .colorScheme
                                                  .outline
                                                  .withOpacity(0.5),
                                            ),
                                            borderRadius:
                                                BorderRadius.circular(8),
                                          ),
                                          child: Row(
                                            children: [
                                              Expanded(
                                                child: Row(
                                                  children: [
                                                    Icon(
                                                      Icons.access_time,
                                                      color: Theme.of(context)
                                                          .colorScheme
                                                          .primary,
                                                      size: 22,
                                                    ),
                                                    const SizedBox(width: 12),
                                                    Text(
                                                      '${provider.reminderHour.toString().padLeft(2, '0')}:${provider.reminderMinute.toString().padLeft(2, '0')}',
                                                      style: TextStyle(
                                                        fontSize: 16,
                                                        fontWeight:
                                                            FontWeight.bold,
                                                        color: Theme.of(context)
                                                            .colorScheme
                                                            .onSurface,
                                                      ),
                                                    ),
                                                  ],
                                                ),
                                              ),
                                              Icon(
                                                Icons.arrow_forward_ios,
                                                size: 16,
                                                color: Theme.of(context)
                                                    .colorScheme
                                                    .outline,
                                              ),
                                            ],
                                          ),
                                        ),
                                      ),

                                      // 반복 알림 스위치 (2일전, 3일전 선택 시에만 활성화)
                                      if (provider.reminderDays >= 2)
                                        Padding(
                                          padding:
                                              const EdgeInsets.only(top: 16.0),
                                          child: Container(
                                            padding: const EdgeInsets.symmetric(
                                                vertical: 4, horizontal: 4),
                                            decoration: BoxDecoration(
                                              color: Theme.of(context)
                                                  .colorScheme
                                                  .surfaceVariant
                                                  .withOpacity(0.3),
                                              borderRadius:
                                                  BorderRadius.circular(8),
                                            ),
                                            child: SwitchListTile(
                                              contentPadding:
                                                  const EdgeInsets.symmetric(
                                                      horizontal: 12),
                                              title: const Text('1일마다 반복 알림'),
                                              subtitle: const Text(
                                                  '결제일까지 매일 알림을 받습니다'),
                                              value: provider
                                                  .isDailyReminderEnabled,
                                              activeColor: Theme.of(context)
                                                  .colorScheme
                                                  .primary,
                                              onChanged: (value) {
                                                provider
                                                    .setDailyReminderEnabled(
                                                        value);
                                              },
                                            ),
                                          ),
                                        ),
                                    ],
                                  ),
                                ),
                              ),
                            )
                          : const SizedBox.shrink(),
                    ),
                    // 미사용 서비스 알림 기능 비활성화
                    // const Divider(),
                    // SwitchListTile(
                    //   title: const Text('미사용 서비스 알림'),
                    //   subtitle: const Text('2개월 이상 미사용 시 알림'),
                    //   value: provider.isUnusedServiceNotificationEnabled,
                    //   onChanged: (value) {
                    //     provider.setUnusedServiceNotificationEnabled(value);
                    //   },
                    // ),
                  ],
                );
              },
            ),
          ),

          // 데이터 관리
          Card(
            margin: const EdgeInsets.all(16),
            child: Column(
              children: [
                // 데이터 백업 기능 비활성화
                // ListTile(
                //   title: const Text('데이터 백업'),
                //   subtitle: const Text('구독 데이터를 백업합니다'),
                //   leading: const Icon(Icons.backup),
                //   onTap: () => _backupData(context),
                // ),
                // const Divider(),
                // SMS 스캔 - 시각적으로 강조된 UI
                InkWell(
                  onTap: () => _navigateToSmsScan(context),
                  child: Container(
                    decoration: BoxDecoration(
                      gradient: LinearGradient(
                        colors: [
                          Theme.of(context).primaryColor.withOpacity(0.1),
                          Theme.of(context).primaryColor.withOpacity(0.2),
                        ],
                        begin: Alignment.topLeft,
                        end: Alignment.bottomRight,
                      ),
                      borderRadius: const BorderRadius.only(
                        bottomLeft: Radius.circular(12),
                        bottomRight: Radius.circular(12),
                      ),
                    ),
                    child: Padding(
                      padding: const EdgeInsets.symmetric(
                          vertical: 16.0, horizontal: 8.0),
                      child: Row(
                        children: [
                          Container(
                            padding: const EdgeInsets.all(12),
                            margin: const EdgeInsets.only(left: 8, right: 16),
                            decoration: BoxDecoration(
                              color: Theme.of(context)
                                  .primaryColor
                                  .withOpacity(0.15),
                              borderRadius: BorderRadius.circular(12),
                            ),
                            child: Icon(
                              Icons.sms_rounded,
                              color: Theme.of(context).primaryColor,
                              size: 28,
                            ),
                          ),
                          Expanded(
                            child: Column(
                              crossAxisAlignment: CrossAxisAlignment.start,
                              children: [
                                Row(
                                  children: [
                                    Text(
                                      'SMS 스캔으로 구독 자동 찾기',
                                      style: TextStyle(
                                        fontWeight: FontWeight.bold,
                                        fontSize: 16,
                                        color: Theme.of(context).primaryColor,
                                      ),
                                    ),
                                    const SizedBox(width: 6),
                                    Container(
                                      padding: const EdgeInsets.symmetric(
                                        horizontal: 8,
                                        vertical: 3,
                                      ),
                                      decoration: BoxDecoration(
                                        color: Theme.of(context).primaryColor,
                                        borderRadius: BorderRadius.circular(12),
                                      ),
                                      child: const Text(
                                        '추천',
                                        style: TextStyle(
                                          color: Colors.white,
                                          fontSize: 10,
                                          fontWeight: FontWeight.bold,
                                        ),
                                      ),
                                    ),
                                  ],
                                ),
                                const SizedBox(height: 6),
                                const Text(
                                  '2회 이상 반복 결제된 구독 서비스를 자동으로 찾아 추가합니다',
                                  style: TextStyle(
                                    color: Colors.black54,
                                    fontSize: 13,
                                  ),
                                ),
                              ],
                            ),
                          ),
                          Icon(
                            Icons.arrow_forward_ios,
                            size: 16,
                            color: Theme.of(context).primaryColor,
                          ),
                          const SizedBox(width: 16),
                        ],
                      ),
                    ),
                  ),
                ),
              ],
            ),
          ),

          // 앱 정보
          Card(
            margin: const EdgeInsets.symmetric(horizontal: 16),
            child: ListTile(
              title: const Text('앱 정보'),
              subtitle: const Text('버전 1.0.0'),
              leading: const Icon(Icons.info),
              onTap: () async {
                // 웹 환경에서는 기본 다이얼로그 표시
                if (kIsWeb) {
                  showAboutDialog(
                    context: context,
                    applicationName: 'SubManager',
                    applicationVersion: '1.0.0',
                    applicationIcon: const FlutterLogo(size: 50),
                    children: [
                      const Text('구독 관리 앱'),
                      const SizedBox(height: 8),
                      const Text('개발자: SubManager Team'),
                    ],
                  );
                  return;
                }

                // 앱 스토어 링크
                String storeUrl = '';

                // 플랫폼에 따라 스토어 링크 설정
                if (Platform.isAndroid) {
                  // Android - Google Play 스토어 링크
                  storeUrl =
                      'https://play.google.com/store/apps/details?id=com.submanager.app';
                } else if (Platform.isIOS) {
                  // iOS - App Store 링크
                  storeUrl =
                      'https://apps.apple.com/app/submanager/id123456789';
                }

                if (storeUrl.isNotEmpty) {
                  try {
                    final Uri url = Uri.parse(storeUrl);
                    await launchUrl(url, mode: LaunchMode.externalApplication);
                  } catch (e) {
                    if (context.mounted) {
                      ScaffoldMessenger.of(context).showSnackBar(
                        const SnackBar(content: Text('스토어를 열 수 없습니다')),
                      );
                    }
                  }
                } else {
                  // 스토어 링크를 열 수 없는 경우 기존 정보 다이얼로그 표시
                  showAboutDialog(
                    context: context,
                    applicationName: 'SubManager',
                    applicationVersion: '1.0.0',
                    applicationIcon: const FlutterLogo(size: 50),
                    children: [
                      const Text('구독 관리 앱'),
                      const SizedBox(height: 8),
                      const Text('개발자: SubManager Team'),
                    ],
                  );
                }
              },
            ),
          ),
        ],
      ),
    );
  }
}