proposal-system/api/src/ProposalSystem.Application/Validators/BulkUpdateLineItemsValidator.cs

using FluentValidation;
using ProposalSystem.Application.DTOs;

namespace ProposalSystem.Application.Validators;

public class BulkUpdateLineItemsValidator : AbstractValidator<BulkUpdateLineItemsRequest>
{
    public BulkUpdateLineItemsValidator()
    {
        RuleFor(x => x.LineItems).NotNull();

        RuleForEach(x => x.LineItems).ChildRules(entry =>
        {
            entry.RuleFor(x => x.Description)
                .NotEmpty().WithMessage("Description is required")
                .MaximumLength(1000);

            entry.RuleFor(x => x.Quantity)
                .GreaterThan(0).WithMessage("Quantity must be positive");

            entry.RuleFor(x => x.Unit)
                .NotEmpty().WithMessage("Unit is required")
                .MaximumLength(50);

            entry.RuleFor(x => x.TotalPrice)
                .GreaterThanOrEqualTo(0).WithMessage("Total price cannot be negative");

            entry.RuleFor(x => x.UnitPrice)
                .GreaterThanOrEqualTo(0)
                .When(x => x.UnitPrice.HasValue)
                .WithMessage("Unit price cannot be negative");

            entry.RuleFor(x => x.PricingMode).IsInEnum();
            entry.RuleFor(x => x.Source).IsInEnum();
            entry.RuleFor(x => x.SortOrder).GreaterThanOrEqualTo(0);
        });
    }
}