/*-
 * ============LICENSE_START=======================================================
 * org.openecomp.aai
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.aai.introspection.sideeffect;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.spy;
import static org.mockito.Mockito.when;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.lang.reflect.InvocationTargetException;
import java.net.MalformedURLException;
import java.net.URISyntaxException;

import org.apache.commons.io.IOUtils;
import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversalSource;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.VertexProperty;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import org.openecomp.aai.db.props.AAIProperties;
import org.openecomp.aai.dbmap.DBConnectionType;
import org.openecomp.aai.exceptions.AAIException;
import org.openecomp.aai.introspection.Introspector;
import org.openecomp.aai.introspection.Loader;
import org.openecomp.aai.introspection.LoaderFactory;
import org.openecomp.aai.introspection.ModelType;
import org.openecomp.aai.introspection.Version;
import org.openecomp.aai.introspection.sideeffect.exceptions.AAIMissingRequiredPropertyException;
import org.openecomp.aai.parsers.query.QueryParser;
import org.openecomp.aai.serialization.db.DBSerializer;
import org.openecomp.aai.serialization.engines.QueryStyle;
import org.openecomp.aai.serialization.engines.TitanDBEngine;
import org.openecomp.aai.serialization.engines.TransactionalGraphEngine;
import org.openecomp.aai.serialization.queryformats.QueryFormatTestHelper;
import org.openecomp.aai.util.AAIConstants;
import com.thinkaurelius.titan.core.TitanFactory;
import com.thinkaurelius.titan.core.TitanGraph;
import com.thinkaurelius.titan.core.TitanTransaction;

public class DataCopyTest {

	private static TitanGraph graph;
	private final static Version version = Version.v10;
	private final static ModelType introspectorFactoryType = ModelType.MOXY;
	private final static QueryStyle queryStyle = QueryStyle.TRAVERSAL;
	private final static DBConnectionType type = DBConnectionType.REALTIME;
	private static Loader loader;
	private static TransactionalGraphEngine dbEngine;
	@Mock private Vertex self;
	@Mock private VertexProperty<String> prop;
	@Mock private QueryParser uriQuery;
	@Rule
	public ExpectedException thrown = ExpectedException.none();
	
	
	@BeforeClass
	public static void setup() throws NoSuchFieldException, SecurityException, Exception {
		graph = TitanFactory.build().set("storage.backend","inmemory").open();
		System.setProperty("AJSC_HOME", "./src/test/resources/");
		System.setProperty("BUNDLECONFIG_DIR", "bundleconfig-local");
		QueryFormatTestHelper.setFinalStatic(AAIConstants.class.getField("AAI_HOME_ETC_OXM"), "src/test/resources/org/openecomp/aai/introspection/");
		loader = LoaderFactory.createLoaderForVersion(introspectorFactoryType, version);
		dbEngine = new TitanDBEngine(
				queryStyle,
				type,
				loader);
		
		graph.traversal().addV("aai-node-type", "model", "model-invariant-id", "key1").as("v1")
		.addV("aai-node-type", "model-ver", "model-ver", "myValue", "model-version-id", "key2", "model-version", "testValue").addInE("has", "v1", "isParent", true)
		.addV("aai-node-type", "model", "model-invariant-id", "key3").as("v2")
		.addV("aai-node-type", "model-ver", "model-ver", "myValue", "model-version-id", "key4").addInE("has", "v2", "isParent", true)
		.next();
		graph.tx().commit();
	}
	
	@AfterClass
	public static void tearDown() {
		graph.tx().rollback();
		graph.close();
	}
	
	@Before
	public void initMock() {
		MockitoAnnotations.initMocks(this);
	}
	
	@Test
	public void runPopulatePersonaModelVer() throws URISyntaxException, AAIException, UnsupportedEncodingException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, SecurityException, InstantiationException, NoSuchMethodException, MalformedURLException {
		
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v10);
		final Introspector obj = loader.introspectorFromName("test-object");
		obj.setValue("vnf-id", "myId");
		obj.setValue("model-invariant-id", "key1");
		obj.setValue("model-version-id", "key2");
		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		SideEffectRunner runner = new SideEffectRunner
				.Builder(spy, serializer).addSideEffect(DataCopy.class).build();
		
		runner.execute(obj, self);

		assertEquals("value populated", "testValue", obj.getValue("persona-model-ver"));
		
		g.rollback();
		
		
	}
	
	@Test
	public void runPopulateModelVersionId() throws URISyntaxException, AAIException, UnsupportedEncodingException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, SecurityException, InstantiationException, NoSuchMethodException, MalformedURLException {
		
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v9);
		final Introspector obj = loader.introspectorFromName("test-object");
		obj.setValue("vnf-id", "myId");
		obj.setValue("persona-model-id", "key1");
		obj.setValue("persona-model-version", "testValue");
		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		SideEffectRunner runner = new SideEffectRunner
				.Builder(spy, serializer).addSideEffect(DataCopy.class).build();
		
		runner.execute(obj, self);
		
		assertEquals("value populated", "key2", obj.getValue("model-version-id"));
		
		g.rollback();
	}
	
	@Test
	public void verifyNestedSideEffect() throws URISyntaxException, AAIException, IllegalAccessException, IllegalArgumentException, InvocationTargetException, SecurityException, InstantiationException, NoSuchMethodException, IOException {
		
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v10);
		final Introspector obj = loader.unmarshal("customer", this.getJsonString("nested-case.json"));
		System.out.println(obj.marshal(true));
		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.tx()).thenReturn(g);
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		when(uriQuery.isDependent()).thenReturn(false);
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		Vertex v= serializer.createNewVertex(obj);
		serializer.serializeToDb(obj, v, uriQuery, obj.getURI(), "test");
		
		assertEquals("nested value populated", "testValue", g.traversal().V().has("service-instance-id", "nested-instance-key").next().property("persona-model-version").orElse(""));

		g.rollback();

	}
	
	@Test
	public void expectedMissingPropertyExceptionInURI() throws AAIException, UnsupportedEncodingException {
		
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v10);
		final Introspector obj = loader.introspectorFromName("test-object");
		obj.setValue("vnf-id", "myId");
		obj.setValue("model-invariant-id", "key1");

		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		SideEffectRunner runner = new SideEffectRunner
				.Builder(spy, serializer).addSideEffect(DataCopy.class).build();
		
		thrown.expect(AAIMissingRequiredPropertyException.class);
		runner.execute(obj, self);
	}
	
	@Test
	public void expectedMissingPropertyExceptionForResultingObject() throws AAIException, UnsupportedEncodingException {
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v10);
		final Introspector obj = loader.introspectorFromName("test-object");
		obj.setValue("vnf-id", "myId");
		obj.setValue("model-invariant-id", "key3");
		obj.setValue("model-version-id", "key4");

		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		SideEffectRunner runner = new SideEffectRunner
				.Builder(spy, serializer).addSideEffect(DataCopy.class).build();
		
		thrown.expect(AAIMissingRequiredPropertyException.class);
		runner.execute(obj, self);
	}
	
	@Test
	public void expectNoProcessingWithNoProperties() throws AAIException, UnsupportedEncodingException {
		final Loader loader = LoaderFactory.createLoaderForVersion(ModelType.MOXY, Version.v10);
		final Introspector obj = loader.introspectorFromName("test-object");
		obj.setValue("vnf-id", "myId");

		TransactionalGraphEngine spy = spy(dbEngine);
		TransactionalGraphEngine.Admin adminSpy = spy(dbEngine.asAdmin());
		TitanTransaction g = graph.newTransaction();
		GraphTraversalSource traversal = g.traversal();
		when(spy.asAdmin()).thenReturn(adminSpy);
		when(adminSpy.getTraversalSource()).thenReturn(traversal);
		when(self.<String>property(AAIProperties.AAI_URI)).thenReturn(prop);
		when(prop.orElse(null)).thenReturn(obj.getURI());
		DBSerializer serializer = new DBSerializer(version, spy, introspectorFactoryType, "AAI_TEST");
		SideEffectRunner runner = new SideEffectRunner
				.Builder(spy, serializer).addSideEffect(DataCopy.class).build();
		
		runner.execute(obj, self);
		
		assertEquals("no model-version-id", true, obj.getValue("model-version-id") == null);
		assertEquals("no model-invariant-id", true, obj.getValue("model-invariant-id") == null);
		
	}
	
	private String getJsonString(String filename) throws IOException {
		
		
		FileInputStream is = new FileInputStream("src/test/resources/org/openecomp/aai/introspection/sideeffect/" + filename);
		String s =  IOUtils.toString(is, "UTF-8"); 
		IOUtils.closeQuietly(is);
		
		return s;
	}
}