import 'package:uuid/uuid.dart';

import '../services/database_sync_service.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;

  // Sync metadata
  final String syncId;
  final DateTime lastModified;
  final RecordSyncStatus syncStatus;
  final bool isDeleted;

  SupplementIntake({
    this.id,
    required this.supplementId,
    required this.takenAt,
    required this.dosageTaken,
    required this.unitsTaken,
    this.notes,
    String? syncId,
    DateTime? lastModified,
    this.syncStatus = RecordSyncStatus.pending,
    this.isDeleted = false,
  }) : syncId = syncId ?? const Uuid().v4(),
       lastModified = lastModified ?? DateTime.now();

  Map<String, dynamic> toMap() {
    return {
      'id': id,
      'supplementId': supplementId,
      'takenAt': takenAt.toIso8601String(),
      'dosageTaken': dosageTaken,
      'unitsTaken': unitsTaken,
      'notes': notes,
      'syncId': syncId,
      'lastModified': lastModified.toIso8601String(),
      'syncStatus': syncStatus.name,
      'isDeleted': isDeleted ? 1 : 0,
    };
  }

  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'],
      syncId: map['syncId'] ?? const Uuid().v4(),
      lastModified: map['lastModified'] != null
          ? DateTime.parse(map['lastModified'])
          : DateTime.now(),
      syncStatus: map['syncStatus'] != null
          ? RecordSyncStatus.values.firstWhere(
              (e) => e.name == map['syncStatus'],
              orElse: () => RecordSyncStatus.pending,
            )
          : RecordSyncStatus.pending,
      isDeleted: (map['isDeleted'] ?? 0) == 1,
    );
  }

  SupplementIntake copyWith({
    int? id,
    int? supplementId,
    DateTime? takenAt,
    double? dosageTaken,
    double? unitsTaken,
    String? notes,
    String? syncId,
    DateTime? lastModified,
    RecordSyncStatus? syncStatus,
    bool? isDeleted,
  }) {
    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,
      syncId: syncId ?? this.syncId,
      lastModified: lastModified ?? this.lastModified,
      syncStatus: syncStatus ?? this.syncStatus,
      isDeleted: isDeleted ?? this.isDeleted,
    );
  }

  /// Create a new intake marked as synced
  SupplementIntake markAsSynced() {
    return copyWith(
      syncStatus: RecordSyncStatus.synced,
    );
  }

  /// Create a new intake marked for deletion
  SupplementIntake markAsDeleted() {
    return copyWith(
      isDeleted: true,
      lastModified: DateTime.now(),
      syncStatus: RecordSyncStatus.modified,
    );
  }
}