/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017-2018 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.onap.aai.serialization.queryformats;

import com.google.gson.JsonObject;
import org.apache.tinkerpop.gremlin.process.traversal.strategy.verification.ReadOnlyStrategy;
import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.T;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.onap.aai.AAISetup;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.Loader;
import org.onap.aai.introspection.ModelType;
import org.onap.aai.introspection.exceptions.AAIUnknownObjectException;
import org.onap.aai.serialization.db.DBSerializer;
import org.onap.aai.serialization.engines.JanusGraphDBEngine;
import org.onap.aai.serialization.engines.QueryStyle;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
import org.onap.aai.serialization.queryformats.utils.UrlBuilder;
import org.springframework.test.annotation.DirtiesContext;

import javax.ws.rs.core.MultivaluedHashMap;
import javax.ws.rs.core.MultivaluedMap;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;

import static org.junit.Assert.*;
import static org.mockito.Matchers.*;
import static org.mockito.Mockito.*;

@DirtiesContext(classMode = DirtiesContext.ClassMode.BEFORE_CLASS)
public class SimpleFormatTest extends AAISetup {

    @Mock
    private UrlBuilder urlBuilder;

    private Graph graph;
    private TransactionalGraphEngine dbEngine;
    private Loader loader;
    private DBSerializer serializer;
    private RawFormat simpleFormat;
    private Vertex vfModule;
    private Vertex unknown;
    private final ModelType factoryType = ModelType.MOXY;

    @Before
    public void setUp() throws Exception {

        MockitoAnnotations.initMocks(this);

        graph = TinkerGraph.open();

        vfModule = graph.addVertex(T.label, "vf-module", T.id, "5", "aai-node-type", "vf-module", "vf-module-id",
                "vf-module-id-val-68205", "vf-module-name", "example-vf-module-name-val-68205", "heat-stack-id",
                "example-heat-stack-id-val-68205", "orchestration-status", "example-orchestration-status-val-68205",
                "is-base-vf-module", "true", "resource-version", "1498166571906", "model-invariant-id",
                "fe8aac07-ce6c-4f9f-aa0d-b561c77da9e8", "model-invariant-id-local",
                "fe8aac07-ce6c-4f9f-aa0d-b561c77da9e8", "model-version-id", "0d23052d-8ffe-433e-a25d-da5da027bb7c",
                "model-version-id-local", "0d23052d-8ffe-433e-a25d-da5da027bb7c", "widget-model-id",
                "example-widget-model-id-val-68205", "widget-model-version", "example-widget--model-version-val-68205",
                "contrail-service-instance-fqdn", "example-contrail-service-instance-fqdn-val-68205");

        unknown = graph.addVertex(T.label, "unknown", T.id, "1", "aai-node-type", "unknown", "vserver-id",
                "vserver-id-1", "vserver-name", "vserver-name-1");
    }

    @Test
    public void testCreatePropertiesObjectReturnsProperProperties() throws AAIFormatVertexException, AAIException {

        createLoaderEngineSetup();
        serializer = new DBSerializer(schemaVersions.getRelatedLinkVersion(), dbEngine, factoryType, "Junit");
        simpleFormat =
                new RawFormat.Builder(loader, serializer, urlBuilder).nodesOnly(true).depth(0).modelDriven().build();

        assertNotNull(dbEngine.tx());
        assertNotNull(dbEngine.asAdmin());

        JsonObject json = simpleFormat.createPropertiesObject(vfModule).get();

        assertTrue(json.has("model-invariant-id"));
        assertTrue(json.has("model-version-id"));

        assertFalse(json.has("model-invariant-id-local"));
        assertFalse(json.has("model-version-id-local"));

    }

    @Test
    public void testUnknownVertex() throws AAIFormatVertexException, AAIException {

        createLoaderEngineSetup();
        serializer = new DBSerializer(schemaVersions.getRelatedLinkVersion(), dbEngine, factoryType, "Junit");
        simpleFormat =
                new RawFormat.Builder(loader, serializer, urlBuilder).nodesOnly(true).depth(0).modelDriven().build();

        assertNotNull(dbEngine.tx());
        assertNotNull(dbEngine.asAdmin());

        assertFalse(simpleFormat.getJsonFromVertex(unknown).isPresent());

    }

    @Test
    public void testFormattingUnknownVertex() throws AAIException {

        createLoaderEngineSetup();
        serializer = new DBSerializer(schemaVersions.getRelatedLinkVersion(), dbEngine, factoryType, "Junit");

        FormatFactory ff = new FormatFactory(loader, serializer, schemaVersions, basePath, "https://localhost:8447/aai/");
        MultivaluedMap mvm = new MultivaluedHashMap();
        mvm.add("depth", "0");
        Formatter formatter = ff.get(Format.simple, mvm);

        JsonObject json = formatter.output(Arrays.asList(unknown, vfModule));

    }

    @Ignore
    @Test(expected = AAIFormatVertexException.class)
    public void testCreatePropertiesObjectThrowsExceptionIfSerializationFails()
            throws AAIFormatVertexException, AAIException, UnsupportedEncodingException {

        serializer = mock(DBSerializer.class);
        loader = mock(Loader.class);

        simpleFormat = new RawFormat.Builder(loader, serializer, urlBuilder).nodesOnly(true).depth(0).build();

        when(serializer.dbToObject(anyObject(), anyObject(), anyInt(), anyBoolean(), anyString()))
                .thenThrow(new AAIException("Test Exception"));

        simpleFormat.createPropertiesObject(vfModule);
    }

    @Ignore
    @Test(expected = AAIFormatVertexException.class)
    public void testCreatePropertiesObjectThrowsExceptionIfUnknownObject()
            throws AAIFormatVertexException, AAIException, UnsupportedEncodingException {

        loader = mock(Loader.class);
        serializer = mock(DBSerializer.class);

        simpleFormat = new RawFormat.Builder(loader, serializer, urlBuilder).nodesOnly(true).depth(0).build();

        when(loader.introspectorFromName(anyString())).thenThrow(new AAIUnknownObjectException("Test Exception"));

        simpleFormat.createPropertiesObject(vfModule);
    }

    public void createLoaderEngineSetup() {

        if (loader == null) {
            loader = loaderFactory.createLoaderForVersion(factoryType, schemaVersions.getRelatedLinkVersion());
            dbEngine = spy(new JanusGraphDBEngine(QueryStyle.TRAVERSAL, loader));

            TransactionalGraphEngine.Admin spyAdmin = spy(dbEngine.asAdmin());

            when(dbEngine.tx()).thenReturn(graph);
            when(dbEngine.asAdmin()).thenReturn(spyAdmin);

            when(spyAdmin.getReadOnlyTraversalSource())
                    .thenReturn(graph.traversal().withStrategies(ReadOnlyStrategy.instance()));
            when(spyAdmin.getTraversalSource()).thenReturn(graph.traversal());
        }
    }
}