Core/Interfaces/IDeliveryNoteDom.cs

@@ -49,4 +49,9 @@ public interface IDeliveryNoteDom
     /// Puede estar vacía si no existen registros.
     /// </returns>
     Task<IEnumerable<DeliveryNoteDto>> GetDtosByQuoteIdAsync(int quoteId);
+
+    /// <summary>
+    /// Valida y prepara la emisión de un Delivery Note.
+    /// </summary>
+    Task<DeliveryNoteCreateResponse> CreateAndIssueDeliveryNoteAsync(DeliveryNoteCreateRequest request);
 }

Core/Services/DeliveryNoteService.cs

@@ -1,5 +1,6 @@
 using Core.Interfaces;
 using Domain.Dtos.Sales;
+using Domain.Entities;
 using Domain.Generics;
 using Models.Interfaces;
 
@@ -60,5 +61,44 @@ namespace Core.Services
 
             return _deliveryNoteRepository.GetDtosByQuoteIdAsync(quoteId);
         }
+
+        public Task<DeliveryNoteCreateResponse> CreateAndIssueDeliveryNoteAsync(DeliveryNoteCreateRequest request)
+        {
+            ArgumentNullException.ThrowIfNull(request);
+
+            if (string.IsNullOrWhiteSpace(request.DeliveryNoteNumber))
+                throw new ArgumentException("El número de remito es obligatorio.", nameof(request.DeliveryNoteNumber));
+
+            if (request.CustomerId <= 0)
+                throw new ArgumentException("Debe seleccionar un cliente.", nameof(request.CustomerId));
+
+            if (request.IssueDate == default)
+                throw new ArgumentException("La fecha de emisión es obligatoria.", nameof(request.IssueDate));
+
+            if (request.Items is null || request.Items.Count == 0)
+                throw new InvalidOperationException("Debe incluir al menos un ítem.");
+
+            if (request.Items.Any(i => i.Quantity <= 0))
+                throw new InvalidOperationException("Todas las cantidades deben ser mayores a cero.");
+
+            if (request.Items.Any(i => string.IsNullOrWhiteSpace(i.Description)))
+                throw new InvalidOperationException("Todos los ítems deben incluir descripción.");
+
+            var entity = new EDeliveryNote
+            {
+                DeliveryNoteNumber = request.DeliveryNoteNumber.Trim(),
+                QuoteId = request.QuoteId,
+                IssueDate = request.IssueDate,
+                CustomerId = request.CustomerId,
+                Observations = request.Observations,
+                ExtraInfoJson = request.ExtraInfoJson
+            };
+
+            return Task.FromResult(new DeliveryNoteCreateResponse
+            {
+                Id = entity.Id,
+                DeliveryNoteNumber = entity.DeliveryNoteNumber
+            });
+        }
     }
 }