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/*
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 */
package services;

import db.NewsSource;
import io.reactivex.Observable;
import java.util.HashMap;
import javax.ejb.Stateless;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import org.neo4j.ogm.cypher.BooleanOperator;
import org.neo4j.ogm.cypher.ComparisonOperator;
import org.neo4j.ogm.cypher.Filter;
import org.neo4j.ogm.cypher.Filters;
import org.neo4j.ogm.cypher.query.SortOrder;
import utils.DatabaseUtils;

/**
 *
 * @author zua
 */

@TransactionManagement(TransactionManagementType.CONTAINER)
@Stateless
public class NewsSourceService extends AbstractDBService  implements NewsSourceServiceInterface {

    @Override
    public Observable findAllSources() {
        return Observable.fromIterable(getSession().loadAll(NewsSource.class, 2));
    }
    
    @Override
    public Observable findSourcesWithCategory(String category) {
        Filter fCategory = new Filter("category", ComparisonOperator.EQUALS, category);
        return Observable.fromIterable(getSession().loadAll(NewsSource.class, fCategory, 2));
    }

    @Override
    public Observable findSourcesWithoutLogo() {
        Filter nullLogoFilter = new Filter("logoUrl", ComparisonOperator.IS_NULL);
        Filter emptyLogoFilter = new Filter("logoUrl", ComparisonOperator.EQUALS, "");
        emptyLogoFilter.setBooleanOperator(BooleanOperator.OR);
        Filters filters = new Filters(nullLogoFilter, emptyLogoFilter);
        return Observable.fromIterable(getSession().loadAll(NewsSource.class, filters, 2));
    }

    @Override
    public Observable findSourcesWithLanguage(String language) {
        Filter fCategory = new Filter("language", ComparisonOperator.EQUALS, language);
        return Observable.fromIterable(getSession().loadAll(NewsSource.class, fCategory, 2));
    }

    @Override
    public Observable findSourcesWithCountry(String country) {
        Filter fCategory = new Filter("country", ComparisonOperator.EQUALS, country);
        return Observable.fromIterable(getSession().loadAll(NewsSource.class, fCategory, 2));
    }
    

    @Override
    public Class getClassType() {
        return NewsSource.class;
    }
      
    @Override
    public SortOrder getSortOrderAsc() {
        return new SortOrder().add(SortOrder.Direction.ASC, "name");
    }

    @Override
    public SortOrder getSortOrderDesc() {
        return new SortOrder().add(SortOrder.Direction.DESC, "name");
    }

    @Override
    public Observable findCategories() {
        String query = SourcesQueries.findAllCategoriesQuery();
        return executeQuery(String.class, query);
    }

    @Override
    public Observable findNames() {
        String query = SourcesQueries.findAllNamesQuery();
        return executeQuery(String.class, query);
    }

    @Override
    public Observable findLanguages() {
        String query = SourcesQueries.findAllLanguagesQuery();
        return executeQuery(String.class, query);
    }

    @Override
    public Observable findCountries() {
        String query = SourcesQueries.findAllCountriesQuery();
        return executeQuery(String.class, query);
    }

    @Override
    public Observable findLocales() {
        String query = SourcesQueries.findAllLocalesQuery();
        return executeQuery(String.class, query);
    }
    
    @Override
    public NewsSource findSourceWithSourceId(String sourceId) {
        String query = "MATCH (n:NewsSource) ";
        query += "WHERE n.sourceId=" + DatabaseUtils.getInstance().wrapUp(sourceId) + " ";
        query += "  RETURN n ";
        return getSession().queryForObject(getClassType(), query, new HashMap());
    }

    @Override
    public NewsSource findSourceNamed(String name) {
        String query = "MATCH (n:NewsSource) ";
        query += "WHERE n.name=" + DatabaseUtils.getInstance().wrapUp(name) + " ";
        query += "  RETURN n ";
        return getSession().queryForObject(getClassType(), query, new HashMap());
    }


}