using DocuMed.Domain.Entities.Staffs;

namespace DocuMed.Repository.Handlers.MedicalHistories;

public class CreateMedicalHistoryCommandHandler(
    IRepositoryWrapper repositoryWrapper,
    ICurrentUserService currentUserService,
    IMediator mediator) : IRequestHandler<CreateMedicalHistoryCommand,Guid>
{
    public async Task<Guid> Handle(CreateMedicalHistoryCommand template, CancellationToken cancellationToken)
    {
        if (!Guid.TryParse(currentUserService.UserId, out Guid userId))
            throw new AppException("دسترسی غیرمجاز", ApiResultStatusCode.UnAuthorized);

        var student = await repositoryWrapper.SetRepository<Student>()
            .TableNoTracking
            .FirstOrDefaultAsync(f => f.UserId == userId, cancellationToken);

        if (student == null)
            throw new BaseApiException(ApiResultStatusCode.NotFound, "Student not found");


        Guid patientId;
        if (template.PatientId != default)
        {
            var patient = await repositoryWrapper.SetRepository<Patient>()
                .TableNoTracking
                .FirstOrDefaultAsync(f => f.Id == template.PatientId, cancellationToken);
            if (patient == null)
                throw new BaseApiException(ApiResultStatusCode.NotFound, "Patient not found");
            patientId = patient.Id;
        }
        else
        {
            var patentCommand = new CreatePatientCommand(template.FirstName,
                template.LastName,
                string.Empty,
                template.NationalId,
                string.Empty,
                string.Empty,
                DateTime.Now,
                template.SectionId
            );

            patientId = await mediator.Send(patentCommand, cancellationToken);
        }

        var ent = MedicalHistory.Create(template.ChiefComplaint,
            template.SectionId,
            template.PresentIllnessDetail,
            template.PastDiseasesHistoryDetail,
            template.PastSurgeryHistoryDetail,
            template.FamilyHistoryDetail,
            template.AllergyDetail,
            template.DrugHistoryDetail,
            template.AddictionHistoryDetail,
            template.SystemReviewDetail,
            template.VitalSignDetail,
            template.GeneralAppearanceDetail,
            template.SystolicBloodPressure,
            template.DiastolicBloodPressure,
            template.PulseRate,
            template.SPO2,
            template.Temperature,
            student.Id,
            patientId,
            template.MedicalHistoryTemplateId);

        foreach (var answer in template.Answers)
            ent.AddAnswer(answer.Answer, answer.Question, answer.Part, answer.QuestionType);

        repositoryWrapper.SetRepository<MedicalHistory>().Add(ent);
        await repositoryWrapper.SaveChangesAsync(cancellationToken);
        return ent.Id;
    }
}