import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:hive_flutter/hive_flutter.dart';
import '../models/user_profile.dart';
import '../models/cycle_entry.dart';
import '../services/cycle_service.dart';

/// Provider for the user profile
final userProfileProvider = StateNotifierProvider<UserProfileNotifier, UserProfile?>((ref) {
  return UserProfileNotifier();
});

/// Notifier for the user profile
class UserProfileNotifier extends StateNotifier<UserProfile?> {
  UserProfileNotifier() : super(null) {
    _loadProfile();
  }

  void _loadProfile() {
    final box = Hive.box<UserProfile>('user_profile');
    state = box.get('current_user');
  }

  Future<void> updateProfile(UserProfile profile) async {
    final box = Hive.box<UserProfile>('user_profile');
    await box.put('current_user', profile);
    state = profile;
  }

  Future<void> updateThemeMode(AppThemeMode themeMode) async {
    if (state != null) {
      await updateProfile(state!.copyWith(themeMode: themeMode));
    }
  }

  Future<void> updateAccentColor(String accentColor) async {
    if (state != null) {
      await updateProfile(state!.copyWith(accentColor: accentColor));
    }
  }

  Future<void> updateRelationshipStatus(RelationshipStatus relationshipStatus) async {
    if (state != null) {
      await updateProfile(state!.copyWith(relationshipStatus: relationshipStatus));
    }
  }

  Future<void> clearProfile() async {
    final box = Hive.box<UserProfile>('user_profile');
    await box.clear();
    state = null;
  }
}

/// Provider for cycle entries
final cycleEntriesProvider = StateNotifierProvider<CycleEntriesNotifier, List<CycleEntry>>((ref) {
  return CycleEntriesNotifier();
});

/// Notifier for cycle entries
class CycleEntriesNotifier extends StateNotifier<List<CycleEntry>> {
  CycleEntriesNotifier() : super([]) {
    _loadEntries();
  }

  void _loadEntries() {
    final box = Hive.box<CycleEntry>('cycle_entries');
    state = box.values.toList()..sort((a, b) => b.date.compareTo(a.date));
  }

  Future<void> addEntry(CycleEntry entry) async {
    final box = Hive.box<CycleEntry>('cycle_entries');
    await box.put(entry.id, entry);
    _loadEntries();
  }

  Future<void> updateEntry(CycleEntry entry) async {
    final box = Hive.box<CycleEntry>('cycle_entries');
    await box.put(entry.id, entry);
    _loadEntries();
  }

  Future<void> deleteEntry(String id) async {
    final box = Hive.box<CycleEntry>('cycle_entries');
    await box.delete(id);
    _loadEntries();
  }

  Future<void> deleteEntriesForMonth(int year, int month) async {
    final box = Hive.box<CycleEntry>('cycle_entries');
    final keysToDelete = <dynamic>[];
    for (var entry in box.values) {
      if (entry.date.year == year && entry.date.month == month) {
        keysToDelete.add(entry.key);
      }
    }
    await box.deleteAll(keysToDelete);
    _loadEntries();
  }

  Future<void> clearEntries() async {
    final box = Hive.box<CycleEntry>('cycle_entries');
    await box.clear();
    state = [];
  }
}

/// Computed provider for current cycle info
final currentCycleInfoProvider = Provider((ref) {
  final user = ref.watch(userProfileProvider);
  final entries = ref.watch(cycleEntriesProvider);
  return CycleService.calculateCycleInfo(user, entries);
});