import 'package:flutter/material.dart';
import 'package:riverpod_annotation/riverpod_annotation.dart';
import 'package:shared_preferences/shared_preferences.dart';

part 'settings_provider.g.dart';

@Riverpod(keepAlive: true)
Future<SharedPreferences> sharedPreferences(SharedPreferencesRef ref) =>
    SharedPreferences.getInstance();

@riverpod
class ThemeModeNotifier extends _$ThemeModeNotifier {
  static const _key = 'theme_mode';

  @override
  ThemeMode build() {
    final prefs = ref.watch(sharedPreferencesProvider).valueOrNull;
    final stored = prefs?.getString(_key);
    return switch (stored) {
      'light' => ThemeMode.light,
      'dark' => ThemeMode.dark,
      _ => ThemeMode.system,
    };
  }

  Future<void> setThemeMode(ThemeMode mode) async {
    final prefs = await ref.read(sharedPreferencesProvider.future);
    await prefs.setString(_key, mode.name);
    state = mode;
  }
}

@riverpod
class LocaleNotifier extends _$LocaleNotifier {
  static const _key = 'locale';

  @override
  Locale? build() {
    final prefs = ref.watch(sharedPreferencesProvider).valueOrNull;
    final stored = prefs?.getString(_key);
    if (stored == null) return null; // use device locale
    return Locale(stored);
  }

  Future<void> setLocale(Locale? locale) async {
    final prefs = await ref.read(sharedPreferencesProvider.future);
    if (locale == null) {
      await prefs.remove(_key);
    } else {
      await prefs.setString(_key, locale.languageCode);
    }
    state = locale;
  }
}

@riverpod
class QuickAccessCountNotifier extends _$QuickAccessCountNotifier {
  static const _key = 'quick_access_count';
  static const int minCount = 4;
  static const int maxCount = 10;
  static const int defaultCount = 6;

  @override
  int build() {
    final prefs = ref.watch(sharedPreferencesProvider).valueOrNull;
    final stored = prefs?.getInt(_key);
    if (stored == null) return defaultCount;
    return stored.clamp(minCount, maxCount);
  }

  Future<void> setCount(int count) async {
    final clamped = count.clamp(minCount, maxCount);
    final prefs = await ref.read(sharedPreferencesProvider.future);
    await prefs.setInt(_key, clamped);
    state = clamped;
  }
}