FACULTATE-HEALTHCARE_MANAGER/backend/Application/Endpoints/Doctors/Login/DoctorLoginValidation.cs

using Application.Services.Database;
using FluentValidation;

namespace Application.Endpoints.Doctors.Login;

public class DoctorLoginValidation : AbstractValidator<DoctorLoginDto>
{
    private readonly IDoctorRepository _doctorRepository;

    public DoctorLoginValidation(IDoctorRepository doctorRepository)
    {
        _doctorRepository = doctorRepository;

        RuleFor(x => x.Email)
            .NotEmpty().WithMessage("Email is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
            .EmailAddress().WithMessage("Invalid email format.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
            .MustAsync(BeExistingDoctor).WithMessage("Doctor with this email does not exist.")
            .WithErrorCode(HttpStatusCodes.NotFound.ToString());

        RuleFor(x => x.Password)
            .NotEmpty().WithMessage("Password is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString())
            .MustAsync((dto, password, cancellationToken) => CredentialsMatch(dto.Email, password, cancellationToken))
            .WithMessage("Incorrect email or password.")
            .WithErrorCode(HttpStatusCodes.Unauthorized.ToString());
    }

    private async Task<bool> BeExistingDoctor(string email, CancellationToken cancellationToken)
    {
        var doctor = await _doctorRepository.FindByEmailAsync(email);
        return doctor != null;
    }

    private async Task<bool> CredentialsMatch(string email, string password, CancellationToken cancellationToken)
    {
        var code = await _doctorRepository.CredentialsMatch(email, password);
        return code;
    }
}