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.")
            .EmailAddress().WithMessage("Invalid email format.")
            .MustAsync(BeExistingDoctor).WithMessage("Doctor with this email does not exist.");

        RuleFor(x => x.Password)
            .NotEmpty().WithMessage("Password is required.")
            .MinimumLength(8).WithMessage("Password must be at least 8 characters long.");
    }

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