import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:relationship_saver/features/ai_digest/domain/ai_digest_models.dart';
import 'package:shared_preferences/shared_preferences.dart';

const String _enabledKey = 'llm_digest_enabled';
const String _preferredWeekdayKey = 'llm_digest_preferred_weekday';
const String _preferredHourKey = 'llm_digest_preferred_hour';
const String _requireWifiKey = 'llm_digest_require_wifi';
const String _requireChargingKey = 'llm_digest_require_charging';
const String _enableWebSearchKey = 'llm_digest_enable_web_search';

class LlmDigestConfigNotifier extends Notifier<LlmDigestConfigState> {
  Future<void>? _initializeFuture;

  @override
  LlmDigestConfigState build() {
    return const LlmDigestConfigState();
  }

  Future<void> initialize() {
    _initializeFuture ??= _initializeFromStorage();
    return _initializeFuture!;
  }

  Future<void> _initializeFromStorage() async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    state = LlmDigestConfigState(
      enabled: prefs.getBool(_enabledKey) ?? false,
      preferredWeekday: prefs.getInt(_preferredWeekdayKey) ?? DateTime.sunday,
      preferredHour: prefs.getInt(_preferredHourKey) ?? 21,
      requireWifi: prefs.getBool(_requireWifiKey) ?? true,
      requireCharging: prefs.getBool(_requireChargingKey) ?? true,
      enableWebSearch: prefs.getBool(_enableWebSearchKey) ?? true,
    );
  }

  Future<void> setEnabled(bool enabled) async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_enabledKey, enabled);
    state = state.copyWith(enabled: enabled);
  }

  Future<void> setPreferredRunWindow({
    required int weekday,
    required int hour,
  }) async {
    final int normalizedWeekday = weekday.clamp(
      DateTime.monday,
      DateTime.sunday,
    );
    final int normalizedHour = hour.clamp(0, 23);
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setInt(_preferredWeekdayKey, normalizedWeekday);
    await prefs.setInt(_preferredHourKey, normalizedHour);
    state = state.copyWith(
      preferredWeekday: normalizedWeekday,
      preferredHour: normalizedHour,
    );
  }

  Future<void> setNetworkPolicy({
    required bool requireWifi,
    required bool requireCharging,
  }) async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_requireWifiKey, requireWifi);
    await prefs.setBool(_requireChargingKey, requireCharging);
    state = state.copyWith(
      requireWifi: requireWifi,
      requireCharging: requireCharging,
    );
  }

  Future<void> setWebSearchEnabled(bool enabled) async {
    final SharedPreferences prefs = await SharedPreferences.getInstance();
    await prefs.setBool(_enableWebSearchKey, enabled);
    state = state.copyWith(enableWebSearch: enabled);
  }
}

final NotifierProvider<LlmDigestConfigNotifier, LlmDigestConfigState>
llmDigestConfigProvider =
    NotifierProvider<LlmDigestConfigNotifier, LlmDigestConfigState>(
      LlmDigestConfigNotifier.new,
    );