FACULTATE-HEALTHCARE_MANAGER/backend/Application/Endpoints/Authorization/Patient/PatientLoginHandler.cs

using Application.Services.Database.PostgreSQL;
using Application.Services.HashingAlgorithms;

namespace Application.Endpoints.Authorization.Patient;

public class PatientLoginHandler
{
    private readonly IPatientRepository _patientRepository;
    private readonly IHashingAlgorithms _hashingAlgorithms;

    public PatientLoginHandler(IPatientRepository patientRepository, IHashingAlgorithms hashingAlgorithms)
    {
        _patientRepository = patientRepository;
        _hashingAlgorithms = hashingAlgorithms;
    }

    public async Task<BaseResponse> Handle(LoginDto loginDTO)
    {
        var validation = new PatientLoginValidation(_patientRepository, _hashingAlgorithms);
        var validationResult = await validation.ValidateAsync(loginDTO);

        if (validationResult.IsValid)
        {
            var patient = await _patientRepository.FindByEmailAsync(loginDTO.Email);
            return new BaseResponse
            {
                StatusCode = HttpStatusCodes.OK,
                Message = "Authentication successful",
                Data = patient
            };
        }

        var firstError = validationResult.Errors.FirstOrDefault();
        var errorCode = int.TryParse(firstError.ErrorCode, out var code) ? code : -1;
        var errorMessage = firstError.ErrorMessage;
        return new BaseResponse
        {
            StatusCode = errorCode,
            Message = errorMessage,
            Data = null
        };
    }
}