namespace DocuMed.Repository.Handlers.Patients;

public class GetPatientQueryHandler(IRepositoryWrapper repositoryWrapper,UserManager<ApplicationUser> userManager) : IRequestHandler<GetPatientQuery, PatientSDto>
{
    public async Task<PatientSDto> Handle(GetPatientQuery request, CancellationToken cancellationToken)
    {
        if (request.Id != null)
        {
            var ent = await repositoryWrapper.SetRepository<Patient>()
                .TableNoTracking
                .Where(f => f.Id == request.Id)
                .Select(PatientMapper.ProjectToSDto)
                .FirstOrDefaultAsync(cancellationToken);
            if(ent == null)
                throw new BaseApiException(ApiResultStatusCode.NotFound, "Patient not found");
            return ent;
        }
        else if (request.NationalId != null)
        {
            var user = await userManager.Users.FirstOrDefaultAsync(f => f.NationalId == request.NationalId,
                cancellationToken);
            if (user == null)
                throw new BaseApiException(ApiResultStatusCode.NotFound, "User with this national id not found");

            var ent = await repositoryWrapper.SetRepository<Patient>()
                .TableNoTracking
                .Where(f => f.UserId == user.Id)
                .Select(PatientMapper.ProjectToSDto)
                .FirstOrDefaultAsync(cancellationToken);
            if (ent == null)
                throw new BaseApiException(ApiResultStatusCode.NotFound, "Patient not found");
            return ent;
        }

        throw new BaseApiException(ApiResultStatusCode.BadRequest, "Request is not correct - NationalId and Id is null");
    }
}