package com.sonymusic.dx.dxadvsearchservice.service;

import com.sonymusic.dx.dxadvsearchservice.dto.LyricsIndicatorDTO;
import com.sonymusic.dx.persistence.gras.LyricsType;
import jakarta.persistence.EntityManager;
import jakarta.persistence.PersistenceContext;
import jakarta.persistence.TypedQuery;
import jakarta.persistence.criteria.CriteriaBuilder;
import jakarta.persistence.criteria.CriteriaQuery;
import jakarta.persistence.criteria.Root;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class LyricsIndicatorService {
    
    @PersistenceContext(name = "dx-gras-persistence")
    private EntityManager em;


    public List<LyricsIndicatorDTO> getListOfLyricsIndicator() {
        CriteriaBuilder cb = em.getCriteriaBuilder();
        CriteriaQuery<LyricsIndicatorDTO> cq=cb.createQuery(LyricsIndicatorDTO.class);
        Root<LyricsType> root =cq.from(LyricsType.class);
        cq.select(cb.construct(
                LyricsIndicatorDTO.class,
                root.get("lyricsTypeKey"),
                root.get("lyricsTypeName")
        ));
        cq.orderBy(cb.asc(root.get("lyricsTypeName")));
        cq.distinct(true);
        TypedQuery<LyricsIndicatorDTO> query = em.createQuery(cq);

        return query.getResultList();
    }
}