package com.example.questionbank.service;

import com.example.questionbank.domain.Choice;
import com.example.questionbank.repository.ChoiceRepository;
import com.example.questionbank.service.dto.ChoiceDTO;
import com.example.questionbank.service.mapper.ChoiceMapper;
import java.util.LinkedList;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

/**
 * Service Implementation for managing {@link com.example.questionbank.domain.Choice}.
 */
@Service
@Transactional
public class ChoiceService {

    private static final Logger LOG = LoggerFactory.getLogger(ChoiceService.class);

    private final ChoiceRepository choiceRepository;

    private final ChoiceMapper choiceMapper;

    public ChoiceService(ChoiceRepository choiceRepository, ChoiceMapper choiceMapper) {
        this.choiceRepository = choiceRepository;
        this.choiceMapper = choiceMapper;
    }

    /**
     * Save a choice.
     *
     * @param choiceDTO the entity to save.
     * @return the persisted entity.
     */
    public ChoiceDTO save(ChoiceDTO choiceDTO) {
        LOG.debug("Request to save Choice : {}", choiceDTO);
        Choice choice = choiceMapper.toEntity(choiceDTO);
        choice = choiceRepository.save(choice);
        return choiceMapper.toDto(choice);
    }

    /**
     * Update a choice.
     *
     * @param choiceDTO the entity to save.
     * @return the persisted entity.
     */
    public ChoiceDTO update(ChoiceDTO choiceDTO) {
        LOG.debug("Request to update Choice : {}", choiceDTO);
        Choice choice = choiceMapper.toEntity(choiceDTO);
        choice = choiceRepository.save(choice);
        return choiceMapper.toDto(choice);
    }

    /**
     * Partially update a choice.
     *
     * @param choiceDTO the entity to update partially.
     * @return the persisted entity.
     */
    public Optional<ChoiceDTO> partialUpdate(ChoiceDTO choiceDTO) {
        LOG.debug("Request to partially update Choice : {}", choiceDTO);

        return choiceRepository
            .findById(choiceDTO.getId())
            .map(existingChoice -> {
                choiceMapper.partialUpdate(existingChoice, choiceDTO);

                return existingChoice;
            })
            .map(choiceRepository::save)
            .map(choiceMapper::toDto);
    }

    /**
     * Get all the choices.
     *
     * @return the list of entities.
     */
    @Transactional(readOnly = true)
    public List<ChoiceDTO> findAll() {
        LOG.debug("Request to get all Choices");
        return choiceRepository.findAll().stream().map(choiceMapper::toDto).collect(Collectors.toCollection(LinkedList::new));
    }

    /**
     * Get one choice by id.
     *
     * @param id the id of the entity.
     * @return the entity.
     */
    @Transactional(readOnly = true)
    public Optional<ChoiceDTO> findOne(Long id) {
        LOG.debug("Request to get Choice : {}", id);
        return choiceRepository.findById(id).map(choiceMapper::toDto);
    }

    /**
     * Delete the choice by id.
     *
     * @param id the id of the entity.
     */
    public void delete(Long id) {
        LOG.debug("Request to delete Choice : {}", id);
        choiceRepository.deleteById(id);
    }
}