supplements/lib/models/supplement_intake.dart

class SupplementIntake {
  final int? id;
  final int supplementId;
  final DateTime takenAt;
  final double dosageTaken; // Total dosage amount taken
  final double unitsTaken; // Number of units taken (can be fractional)
  final String? notes;

  SupplementIntake({
    this.id,
    required this.supplementId,
    required this.takenAt,
    required this.dosageTaken,
    required this.unitsTaken,
    this.notes,
  });

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'supplementId': supplementId,
      'takenAt': takenAt.toIso8601String(),
      'dosageTaken': dosageTaken,
      'unitsTaken': unitsTaken,
      'notes': notes,
    };
  }

  factory SupplementIntake.fromMap(Map<String, dynamic> map) {
    return SupplementIntake(
      id: map['id'],
      supplementId: map['supplementId'],
      takenAt: DateTime.parse(map['takenAt']),
      dosageTaken: map['dosageTaken'],
      unitsTaken: (map['unitsTaken'] ?? 1).toDouble(), // Default for backwards compatibility
      notes: map['notes'],
    );
  }

  SupplementIntake copyWith({
    int? id,
    int? supplementId,
    DateTime? takenAt,
    double? dosageTaken,
    double? unitsTaken,
    String? notes,
  }) {
    return SupplementIntake(
      id: id ?? this.id,
      supplementId: supplementId ?? this.supplementId,
      takenAt: takenAt ?? this.takenAt,
      dosageTaken: dosageTaken ?? this.dosageTaken,
      unitsTaken: unitsTaken ?? this.unitsTaken,
      notes: notes ?? this.notes,
    );
  }
}