using AutoMapper;
using MediatR;
using mws.backend.dotnet.application.Common;

namespace mws.backend.dotnet.application.MasterData;

public record UpdateMasterDataCommand(Guid Id, SaveMasterDataRequest Request) : IRequest<MasterDataDto>;

public class UpdateMasterDataHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<UpdateMasterDataCommand, MasterDataDto>
{
    public async Task<MasterDataDto> Handle(UpdateMasterDataCommand command, CancellationToken ct)
    {
        var existing = await uow.MasterData.GetByIdAsync(command.Id, ct)
            ?? throw new NotFoundException("Master data entry not found");

        var updated = await MasterDataValidation.ValidateAsync(uow, command.Request, command.Id, ct);

        existing.Group = updated.Group;
        existing.Label = updated.Label;
        existing.Value = updated.Value;
        existing.SortOrder = updated.SortOrder;
        existing.IsActive = updated.IsActive;
        existing.UpdatedAt = DateTime.UtcNow;

        await uow.SaveChangesAsync(ct);
        return mapper.Map<MasterDataDto>(existing);
    }
}