package eu.eudat.data.dao.entities;

import eu.eudat.data.dao.DatabaseAccess;
import eu.eudat.data.dao.criteria.DatasetCriteria;
import eu.eudat.data.dao.databaselayer.service.DatabaseService;
import eu.eudat.data.entities.Dataset;
import eu.eudat.data.entities.UserInfo;
import eu.eudat.queryable.QueryableList;
import eu.eudat.queryable.types.FieldSelectionType;
import eu.eudat.queryable.types.SelectionField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Component;

import java.util.Arrays;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;

@Component("datasetDao")
public class DatasetDaoImpl extends DatabaseAccess<Dataset> implements DatasetDao {

    @Autowired
    public DatasetDaoImpl(DatabaseService<Dataset> databaseService) {
        super(databaseService);
    }

    @Override
    public QueryableList<Dataset> getWithCriteria(DatasetCriteria criteria) {
        QueryableList<Dataset> query = getDatabaseService().getQueryable(Dataset.getHints(), Dataset.class);
        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.getAllVersions())
            query.initSubQuery(String.class).where((builder, root) -> builder.equal(root.get("dmp").get("version"), query.<String>subQueryMax((builder1, externalRoot, nestedRoot) -> builder1.equal(externalRoot.get("dmp").get("groupId"), nestedRoot.get("dmp").get("groupId")), Arrays.asList(new SelectionField(FieldSelectionType.COMPOSITE_FIELD, "dmp:version")), String.class)));
        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 getDatabaseService().createOrUpdate(item, Dataset.class);
    }

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

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

    @Override
    public QueryableList<Dataset> getAuthenticated(QueryableList<Dataset> query, UserInfo principal) {
        if (principal.getId() == null) query.where((builder, root) -> builder.equal(root.get("isPublic"), true));
        else {
            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;
    }

    @Override
    public void delete(Dataset item) {
        this.getDatabaseService().delete(item);
    }

    @Override
    public QueryableList<Dataset> asQueryable() {
        return this.getDatabaseService().getQueryable(Dataset.class);
    }

    @Async
    public CompletableFuture<Dataset> createOrUpdateAsync(Dataset item) {
        return CompletableFuture.supplyAsync(() -> this.createOrUpdate(item));
    }
}