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

import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import org.gcube.common.resources.gcore.Resource;
import org.gcube.common.resources.gcore.Resources;
import org.gcube.common.resources.gcore.ServiceEndpoint;
import org.gcube.common.scope.api.ScopeProvider;
import org.gcube.documentstore.persistence.PersistenceBackend;
import org.gcube.documentstore.persistence.PersistenceBackendFactory;
import org.gcube.documentstore.persistence.PersistenceCouchDB;
import org.gcube.informationsystem.publisher.RegistryPublisherFactory;
import org.gcube.informationsystem.publisher.ScopedPublisher;
import org.gcube.informationsystem.publisher.exception.RegistryNotFoundException;
import org.junit.Assert;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Luca Frosini (ISTI - CNR) http://www.lucafrosini.com/
 *
 */
public class PersistenceCouchDBTest {
	
	private static final Logger logger = LoggerFactory.getLogger(PersistenceCouchDBTest.class);
	
	public static PersistenceBackend getPersistence(){
		ScopeProvider.instance.set("/gcube/devNext");
		PersistenceBackendFactory.setFallbackLocation(null);
		return PersistenceBackendFactory.getPersistenceBackend(ScopeProvider.instance.get());
	}
	
	@Test
	public void persistenceIsCouchDB() {
		PersistenceBackend persistence = getPersistence();
		Assert.assertTrue(persistence instanceof PersistenceCouchDB);
	}
	
	private static void publishScopedResource(Resource resource, List<String> scopes) throws Exception {
		StringWriter stringWriter = new StringWriter();
		Resources.marshal(resource, stringWriter);
		
		ScopedPublisher scopedPublisher = RegistryPublisherFactory.scopedPublisher();
	    try {
			logger.debug("Trying to publish to {}:\n{}", scopes, stringWriter);
	    	scopedPublisher.create(resource, scopes);
		} catch (Exception e) {
			logger.error("The resource was not published", e);
			throw e;
		}
	}
	
	private static void unPublishScopedResource(Resource resource, List<String> scopes) throws RegistryNotFoundException, Exception {
		ScopedPublisher scopedPublisher = RegistryPublisherFactory.scopedPublisher();
	    String id = resource.id();
	    logger.debug("Trying to remove {} with ID {} from {}", resource.getClass().getSimpleName(), id, scopes);
	    scopedPublisher.remove(resource, scopes);
		logger.debug("{} with ID {} removed successfully", resource.getClass().getSimpleName(), id);
	}
	
	public void testScopeRecheck() throws Exception {
		final String vreScopeToUse =  "/gcube/devsec/LucioVRE";
		final String parentVREScopeToUse =  "/gcube/devsec";
		
		ScopeProvider.instance.set(vreScopeToUse);
		
		ServiceEndpoint serviceEndpoint = null;
		try {
			AccountingPersistenceConfiguration persitenceConfiguration = 
					new AccountingPersistenceConfiguration(PersistenceCouchDB.class);
			serviceEndpoint = persitenceConfiguration.getServiceEndpoint(
					AccountingPersistenceConfiguration.SERVICE_ENDPOINT_CATEGORY, 
					AccountingPersistenceConfiguration.SERVICE_ENDPOINT_NAME, 
					PersistenceCouchDB.class);
			List<String> scopes = new ArrayList<String>();
			scopes.add(ScopeProvider.instance.get());
			unPublishScopedResource(serviceEndpoint, scopes);
		} catch(IndexOutOfBoundsException e){
			ScopeProvider.instance.set(parentVREScopeToUse);
			AccountingPersistenceConfiguration persitenceConfiguration = 
					new AccountingPersistenceConfiguration(PersistenceCouchDB.class);
			serviceEndpoint = persitenceConfiguration.getServiceEndpoint(
					AccountingPersistenceConfiguration.SERVICE_ENDPOINT_CATEGORY, 
					AccountingPersistenceConfiguration.SERVICE_ENDPOINT_NAME, 
					PersistenceCouchDB.class);
			ScopeProvider.instance.set(vreScopeToUse);
		}
		

		long startTime = Calendar.getInstance().getTimeInMillis();
		long endTime = startTime;
		while(endTime <=  (startTime + 10*1000)){ // 10 sec
			endTime = Calendar.getInstance().getTimeInMillis();
		}
		
		logger.debug("Going to check First Time");
		PersistenceBackend first = PersistenceBackendFactory.getPersistenceBackend(ScopeProvider.instance.get());
		logger.debug("First {} : {}", PersistenceBackend.class.getSimpleName(), first);
		
		List<String> scopes = new ArrayList<String>();
		scopes.add(ScopeProvider.instance.get());
		publishScopedResource(serviceEndpoint, scopes);
		
		startTime = Calendar.getInstance().getTimeInMillis();
		endTime = startTime;
		while(endTime <=  (startTime + (PersistenceBackendFactory.FALLBACK_RETRY_TIME + 100))){
			endTime = Calendar.getInstance().getTimeInMillis();
		}

		logger.debug("Going to check Second Time");
		PersistenceBackend second = PersistenceBackendFactory.getPersistenceBackend(ScopeProvider.instance.get());
		logger.debug("Second {} : {}", PersistenceBackend.class.getSimpleName(), second);
		
		Assert.assertNotEquals(first, second);
		
	}
}