using FluentValidation;
using SIGCM2.Application.Common;

namespace SIGCM2.Application.Pricing.ChargeableChars.SchedulePrice;

/// <summary>
/// PRC-001 — FluentValidation validator for SchedulePriceChangeCommand.
/// Surface validation only (price > 0, validFrom >= today_AR, id > 0).
/// Forward-only check (ValidFrom > existing row's ValidFrom) is performed in the handler
/// where the existing entity is loaded.
/// </summary>
public sealed class SchedulePriceChangeCommandValidator : AbstractValidator<SchedulePriceChangeCommand>
{
    public SchedulePriceChangeCommandValidator(TimeProvider timeProvider)
    {
        var today = timeProvider.GetArgentinaToday();

        RuleFor(x => x.Id)
            .GreaterThan(0L)
            .WithMessage("Id debe ser un entero positivo.");

        RuleFor(x => x.PricePerUnit)
            .GreaterThan(0m)
            .WithMessage("PricePerUnit debe ser > 0.");

        RuleFor(x => x.ValidFrom)
            .GreaterThanOrEqualTo(today)
            .WithMessage($"ValidFrom debe ser >= hoy ({today:yyyy-MM-dd} ART).");
    }
}