class StockMovementItem {
  final int? id;
  final int? movementId;
  final int? productId;
  final double quantity;
  final double? unitPrice;

  final String? huid;
  final double? weight;
  final String? photoUrl;
  final double? purchaseAmount;

  StockMovementItem({
    this.id,
    this.movementId,
    this.productId,
    required this.quantity,
    this.unitPrice,

    this.huid,
    this.weight,
    this.photoUrl,
    this.purchaseAmount,
  });

  factory StockMovementItem.fromJson(Map<String, dynamic> json) {
    return StockMovementItem(
      id: json['id'],
      movementId: json['movementId'],
      productId: json['productId'],
      quantity: (json['quantity'] as num).toDouble(),
      unitPrice: (json['unitPrice'] as num?)?.toDouble(),

      huid: json['huid'],
      weight: json['weight'] != null ? (json['weight'] as num).toDouble() : null,
      photoUrl: json['photoUrl'],
      purchaseAmount: json['purchaseAmount'] != null ? (json['purchaseAmount'] as num).toDouble() : null,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'movementId': movementId,
      'productId': productId,
      'quantity': quantity,
      'unitPrice': unitPrice,

      'huid': huid,
      'weight': weight,
      'photoUrl': photoUrl,
      'purchaseAmount': purchaseAmount,
    };
  }
}

class StockMovement {
  final int? id;
  final int? userId;
  final int? locationId;
  final String
  type; // OPENING, ADDITION, REDUCTION, ADJUSTMENT, DAMAGE, SALE, RETURN
  final int? referenceTransactionId;
  final String? notes;
  final DateTime? createdAt;
  final List<StockMovementItem>? items;

  StockMovement({
    this.id,
    this.userId,
    this.locationId,
    required this.type,
    this.referenceTransactionId,
    this.notes,
    this.createdAt,
    this.items,
  });

  factory StockMovement.fromJson(Map<String, dynamic> json) {
    return StockMovement(
      id: json['id'],
      userId: json['userId'],
      locationId: json['locationId'],
      type: json['type'],
      referenceTransactionId: json['referenceTransactionId'],
      notes: json['notes'],
      createdAt: json['createdAt'] != null
          ? DateTime.parse(json['createdAt'])
          : null,
      items: json['items'] != null
          ? (json['items'] as List)
                .map((i) => StockMovementItem.fromJson(i))
                .toList()
          : null,
    );
  }

  Map<String, dynamic> toJson() {
    return {
      'id': id,
      'userId': userId,
      'locationId': locationId,
      'type': type,
      'referenceTransactionId': referenceTransactionId,
      'notes': notes,
      if (createdAt != null) 'createdAt': createdAt!.toIso8601String(),
      if (items != null) 'items': items!.map((i) => i.toJson()).toList(),
    };
  }
}