package io.delphiplatform.api.v3.rdb.service.amazon;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;

import io.delphiplatform.api.v3.rdb.entity.amazon.AmazonChartArtistTrackEntity;
import io.delphiplatform.api.v3.rdb.repository.amazon.AmazonChartArtistTrackRepository;
import io.delphiplatform.api.v3.rdb.service.EntityService;

@Service
@Transactional(readOnly = true)
public class AmazonArtistService extends EntityService<AmazonChartArtistTrackEntity> {

    private final AmazonChartArtistTrackRepository repository;

    @Autowired
    public AmazonArtistService(AmazonChartArtistTrackRepository repository) {
        super(repository);
        this.repository = repository;
    }

    public Map<String, String> findByTrackIdToArtistNames(Set<String> trackIds) {
        return repository.findByTrackIdIn(trackIds)
            .stream()
            .collect(Collectors.toMap(AmazonChartArtistTrackEntity::getTrackId,
                AmazonChartArtistTrackEntity::getArtistName,
                (a1, a2) -> a1));
    }

}