package eu.eudat.dao.entities;

import java.util.List;
import java.util.Set;
import java.util.UUID;
import java.util.stream.Collectors;

import javax.persistence.Query;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import eu.eudat.dao.JpaDao;
import eu.eudat.dao.databaselayer.service.DatabaseService;
import eu.eudat.entities.Dataset;
import eu.eudat.entities.Project;
import eu.eudat.entities.UserInfo;
import eu.eudat.entities.responses.IDLabelPair;
import eu.eudat.models.criteria.DatasetCriteria;
import eu.eudat.models.dataset.DatasetTableRequest;
import eu.eudat.models.security.Principal;
import eu.eudat.queryable.QueryableList;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component("datasetDao")
public class DatasetDaoImpl implements DatasetDao {

    @Autowired
    DatabaseService<Dataset> databaseService;

    @Override
    public QueryableList<Dataset> getWithCriteria(DatasetCriteria criteria) {
        QueryableList<Dataset> query = databaseService.getQueryable(Dataset.class, Dataset.getHints());
        if (criteria.getLike() != null && !criteria.getLike().isEmpty())
            query.where((builder, root) -> builder.like(root.get("label"), "%" + criteria.getLike() + "%"));
        if (criteria.getStatus() != null)
            query.where((builder, root) -> builder.equal(root.get("status"), criteria.getStatus()));
        if (criteria.getPeriodEnd() != null)
            query.where((builder, root) -> builder.lessThan(root.get("created"), criteria.getPeriodEnd()));
        if (criteria.getPeriodStart() != null)
            query.where((builder, root) -> builder.greaterThan(root.get("created"), criteria.getPeriodStart()));
        if (criteria.getDmpIds() != null && !criteria.getDmpIds().isEmpty())
            query.where((builder, root) -> root.get("dmp").get("id").in(criteria.getDmpIds()));
        return query;
    }

    @Override
    public Dataset createOrUpdate(Dataset item) {
        return databaseService.createOrUpdate(item, Dataset.class);
    }

    @Override
    public Dataset find(UUID id) {
        return databaseService.getQueryable(Dataset.class).where((builder, root) -> builder.equal((root.get("id")), id)).getSingle();
    }

    public Long count() {
        return this.databaseService.count(Dataset.class);
    }

    @Override
    public QueryableList<Dataset> getAuthenticated(QueryableList<Dataset> query, UserInfo principal) {
        query.where((builder, root) -> builder.or(builder.equal(root.get("dmp").get("creator"), principal), builder.isMember(principal, root.get("dmp").get("users"))
                , builder.equal(root.get("isPublic"), true)));
        return query;
    }
}