package ru.ulstu.name;

import org.springframework.stereotype.Service;
import org.springframework.validation.Errors;

import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

@Service
public abstract class BaseService {

    public BaseRepository baseRepository;

    protected void checkUniqueName(NameContainer nameContainer, Errors errors, Integer id, String errorMessage) {
        if (nameContainer.getName().equals(getUnique(baseRepository.findByNameAndNotId(nameContainer.getName(), id)))) {
            errors.rejectValue("title", "errorCode", errorMessage);
        }
    }

    protected String checkUniqueName(NameContainer nameContainer, Integer id) {
        String foundName = getUnique(baseRepository.findByNameAndNotId(nameContainer.getName(), id));
        if (nameContainer.getName().equals(foundName)) {
            return foundName;
        }
        return null;
    }

    private String getUnique(List<String> names) {
        return Optional.ofNullable(names)
                .orElse(new ArrayList<>())
                .stream()
                .findAny()
                .orElse(null);
    }
}