package eu.hexgate.sexyrankbackend.domain.users;

import eu.hexgate.sexyrankbackend.domain.shared.AppError;
import eu.hexgate.sexyrankbackend.domain.users.api.EmptyRequireData;
import eu.hexgate.sexyrankbackend.domain.users.api.UserDto;
import io.vavr.collection.List;
import io.vavr.control.Either;

class UsersFactory {

    Either<AppError, User> create(UserDto dto) {
        return getValidUserOrReturnError(dto)
                .map(this::toDto);
    }

    private Either<AppError, UserDto> getValidUserOrReturnError(UserDto userDto) {

        List<String> errors = List.empty();

        if (userDto.getEmail() == null)
            errors = errors.append("email");

        if (userDto.getUsername() == null)
            errors = errors.append("username");

        if (userDto.getGender() == null)
            errors = errors.append("gender");

        return errors.isEmpty() ?
                Either.right(userDto) :
                Either.left(new EmptyRequireData(String.join(", ", errors.toJavaList())));


    }

    private User toDto(UserDto dto) {
        return User.builder()
                .birthday(new Birthday(dto.getBirthday()))
                .email(new Email(dto.getEmail()))
                .username(new Username(dto.getUsername()))
                .photos(createPhotos(dto.getPhotos()))
                .gender(Gender.from(dto.getGender()))
                .rank(Rank.ofStartValue())
                .points(Points.zero())
                .build();
    }

    private Photos createPhotos(java.util.List<String> photosStr) {
        return new Photos(List.ofAll(
                photosStr
                        .stream()
                        .map(Photo::new))
        );

    }

}