class HistoryModel {
  final double temperature;
  final double humidity;
  final double co2;
  final double pm25;
  final String overallStatus;
  final String timestamp;
  // ac_action sudah dihapus dari script ESP32 terbaru, gunakan default '-'
  final String acAction;

  HistoryModel({
    required this.temperature,
    required this.humidity,
    required this.co2,
    required this.pm25,
    required this.overallStatus,
    required this.timestamp,
    this.acAction = '-',
  });

  factory HistoryModel.fromMap(Map<dynamic, dynamic> json) {
    return HistoryModel(
      // Support both ESP32 field names and Flutter field names
      temperature: ((json['temperature'] ?? json['suhu']) ?? 0).toDouble(),
      humidity: ((json['humidity'] ?? json['kelembapan']) ?? 0).toDouble(),
      co2: ((json['co2'] ?? json['co2_ppm']) ?? 0).toDouble(),
      pm25: ((json['pm25'] ?? json['pm25_ugm3']) ?? 0).toDouble(),
      overallStatus:
          (json['overall_status'] ?? json['status_keseluruhan'] ?? ''),
      timestamp: _parseTimestamp(json['timestamp']),
      // Backward compatible: gunakan ac_action jika ada, jika tidak gunakan '-'
      acAction: json['ac_action'] ?? '-',
    );
  }

  Map<String, dynamic> toMap() {
    return {
      'temperature': temperature,
      'humidity': humidity,
      'co2': co2,
      'pm25': pm25,
      'overall_status': overallStatus,
      'timestamp': timestamp,
      'ac_action': acAction,
    };
  }
}

String _parseTimestamp(dynamic value) {
  if (value == null) return '';
  if (value is int) {
    // ESP32 mengirim unix timestamp dalam detik, konversi ke milliseconds
    // Jika value > 10000000000 berarti sudah dalam milliseconds
    final timestampMs = value > 10000000000 ? value : value * 1000;
    final dt = DateTime.fromMillisecondsSinceEpoch(timestampMs);
    return "${dt.year}-${dt.month.toString().padLeft(2, '0')}-${dt.day.toString().padLeft(2, '0')} "
        "${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}:${dt.second.toString().padLeft(2, '0')}";
  }
  return value.toString();
}