/**
 * 
 */
package org.gcube.accounting.analytics.persistence.couchbase;

import java.util.Calendar;
import java.util.List;
import java.util.Map;
import java.util.Observable;
import java.util.Set;

import org.gcube.accounting.analytics.Filter;
import org.gcube.accounting.analytics.Info;
import org.gcube.accounting.analytics.TemporalConstraint;
import org.gcube.accounting.analytics.persistence.AccountingPersistenceBackendQuery;
import org.gcube.accounting.analytics.persistence.AccountingPersistenceBackendQueryConfiguration;
import org.gcube.documentstore.records.AggregatedRecord;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.couchbase.client.java.Bucket;
import com.couchbase.client.java.Cluster;
import com.couchbase.client.java.CouchbaseCluster;
import com.couchbase.client.java.env.CouchbaseEnvironment;
import com.couchbase.client.java.env.DefaultCouchbaseEnvironment;
import com.couchbase.client.java.query.N1qlQueryResult;
import com.couchbase.client.java.query.N1qlQueryRow;
import com.couchbase.client.java.query.Select;

/**
 * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
 *
 */
public class AccountingPersistenceQueryCouchBase extends AccountingPersistenceBackendQuery {

	private static final Logger logger = LoggerFactory.getLogger(AccountingPersistenceQueryCouchBase.class);
	
	public static final String URL_PROPERTY_KEY = "URL";
	//public static final String USERNAME_PROPERTY_KEY = "username";
	public static final String PASSWORD_PROPERTY_KEY = "password";
	public static final String BUCKET_NAME_PROPERTY_KEY = "bucketName";
	
	/* The environment configuration */
    protected static final CouchbaseEnvironment ENV = 
    	DefaultCouchbaseEnvironment.builder()
    	.queryEnabled(true)
    	.build();
	
	protected Cluster cluster;
	protected Bucket bucket;
	protected String bucketName;

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected void prepareConnection(AccountingPersistenceBackendQueryConfiguration configuration) throws Exception {
		String url = configuration.getProperty(URL_PROPERTY_KEY);
		// String username = configuration.getProperty(USERNAME_PROPERTY_KEY);
		String password = configuration.getProperty(PASSWORD_PROPERTY_KEY);

		cluster = CouchbaseCluster.create(ENV, url);
		bucketName = configuration.getProperty(BUCKET_NAME_PROPERTY_KEY);
		bucket = cluster.openBucket(bucketName, password);
	}
		
	/**
	 * {@inheritDoc}
	 */
	@Override
	public void close() throws Exception {
		cluster.disconnect();
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	protected Map<Calendar, Info>  reallyQuery(
			@SuppressWarnings("rawtypes") Class<? extends AggregatedRecord> recordClass,
			TemporalConstraint temporalConstraint, List<Filter> filters)
			throws Exception {
		
		N1qlQueryResult result = bucket.query(Select.select("*").from(bucketName).limit(10));
		List<N1qlQueryRow> rows = result.allRows();
		for(N1qlQueryRow row : rows){
			logger.debug(row.toString());
		}

		return null;
	}


	/**
	 * {@inheritDoc}
	 */
	@Override
	public Set<String> getKeys(Class<? extends AggregatedRecord> recordClass)
			throws Exception {
		// TODO Auto-generated method stub
		return null;
	}


	/**
	 * {@inheritDoc}
	 */
	@Override
	public Set<String> getPossibleValuesForKey(
			Class<? extends AggregatedRecord> recordClass, String key)
			throws Exception {
		// TODO Auto-generated method stub
		return null;
	}

	
}