import 'package:hive_flutter/hive_flutter.dart';
import 'package:intl/intl.dart';

import '../local/models.dart';
import 'myquran_service.dart';

/// Service to sync monthly prayer data from MyQuran API → Hive.
class SyncService {
  SyncService._();
  static final SyncService instance = SyncService._();

  /// Sync current month + next month prayer data for the configured city.
  /// Returns true on success.
  Future<bool> syncMonthlyData() async {
    final settingsBox = Hive.box<AppSettings>(HiveBoxes.settings);
    final settings = settingsBox.get('default');
    if (settings == null) return false;

    final cityId = settings.cityIdApi;
    final now = DateTime.now();
    final currentMonth = DateFormat('yyyy-MM').format(now);

    // Also fetch next month for continuity
    final nextMonthDate = DateTime(now.year, now.month + 1, 1);
    final nextMonth = DateFormat('yyyy-MM').format(nextMonthDate);

    final api = MyQuranSholatService.instance;
    final scheduleBox = Hive.box<DailyPrayerSchedule>(HiveBoxes.prayerSchedule);

    var success = false;

    // Fetch current month
    final currentData = await api.getMonthlySchedule(cityId, currentMonth);
    if (currentData.isNotEmpty) {
      for (final entry in currentData.entries) {
        final jadwal = entry.value;
        scheduleBox.put(
          entry.key,
          DailyPrayerSchedule(
            date: entry.key,
            imsak: jadwal['imsak'] ?? '00:00',
            subuh: jadwal['subuh'] ?? '00:00',
            terbit: jadwal['terbit'] ?? '00:00',
            dhuha: jadwal['dhuha'] ?? '00:00',
            dzuhur: jadwal['dzuhur'] ?? '00:00',
            ashar: jadwal['ashar'] ?? '00:00',
            maghrib: jadwal['maghrib'] ?? '00:00',
            isya: jadwal['isya'] ?? '00:00',
          ),
        );
      }
      success = true;
    }

    // Fetch next month
    final nextData = await api.getMonthlySchedule(cityId, nextMonth);
    if (nextData.isNotEmpty) {
      for (final entry in nextData.entries) {
        final jadwal = entry.value;
        scheduleBox.put(
          entry.key,
          DailyPrayerSchedule(
            date: entry.key,
            imsak: jadwal['imsak'] ?? '00:00',
            subuh: jadwal['subuh'] ?? '00:00',
            terbit: jadwal['terbit'] ?? '00:00',
            dhuha: jadwal['dhuha'] ?? '00:00',
            dzuhur: jadwal['dzuhur'] ?? '00:00',
            ashar: jadwal['ashar'] ?? '00:00',
            maghrib: jadwal['maghrib'] ?? '00:00',
            isya: jadwal['isya'] ?? '00:00',
          ),
        );
      }
    }

    if (success) {
      settings.lastSyncDate = DateFormat('yyyy-MM-dd HH:mm').format(now);
      await settings.save();
    }

    return success;
  }

  /// Get today's prayer schedule from local Hive cache.
  DailyPrayerSchedule? getTodaySchedule([DateTime? targetDate]) {
    final scheduleBox =
        Hive.box<DailyPrayerSchedule>(HiveBoxes.prayerSchedule);
    final dateToFetch = targetDate ?? DateTime.now();
    final dateStr = DateFormat('yyyy-MM-dd').format(dateToFetch);
    return scheduleBox.get(dateStr);
  }
}