/*-
 * ============LICENSE_START=======================================================
 * ONAP - SO
 * ================================================================================
 * 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.onap.so.client.aai.entities;

import static org.junit.Assert.assertEquals;
import java.io.IOException;
import java.io.Serializable;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.mockito.junit.MockitoJUnitRunner;
import org.onap.aai.domain.yang.GenericVnf;
import org.onap.so.client.aai.AAICommonObjectMapperProvider;
import org.springframework.util.SerializationUtils;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;

@RunWith(MockitoJUnitRunner.class)
public class AAIResultWrapperTest {
    String json;
    @Rule
    public ExpectedException thrown = ExpectedException.none();

    AAIResultWrapper aaiResultWrapper;
    AAIResultWrapper aaiResultWrapperEmpty;

    @Before
    public void init() throws IOException {
        final String RESOURCE_PATH = "src/test/resources/__files/aai/resources/";
        json = new String(Files.readAllBytes(Paths.get(RESOURCE_PATH + "e2e-complex.json")));

        aaiResultWrapper = new AAIResultWrapper(json);
        aaiResultWrapperEmpty = new AAIResultWrapper("{}");
    }

    @Test
    public void testAAIResultWrapperIsSerializable() throws IOException {
        AAIResultWrapper original = new AAIResultWrapper("");
        byte[] serialized = SerializationUtils.serialize(original);
        AAIResultWrapper deserialized = (AAIResultWrapper) SerializationUtils.deserialize(serialized);
        assertEquals(deserialized.getJson(), original.getJson());
    }

    @Test
    public void testGetRelationshipsEmpty() {
        Optional<Relationships> relationships = aaiResultWrapperEmpty.getRelationships();
        assertEquals("Compare relationships", Optional.empty(), relationships);
    }

    @Test
    public void testAsMap() throws JsonParseException, JsonMappingException, IOException {
        ObjectMapper mapper = new AAICommonObjectMapperProvider().getMapper();
        Map<String, Object> expected = mapper.readValue(json, new TypeReference<Map<String, Object>>() {});

        Map<String, Object> actual = aaiResultWrapper.asMap();
        assertEquals(expected, actual);
    }

    @Test
    public void testAsMapEmpty() {
        Map<String, Object> actual = aaiResultWrapperEmpty.asMap();
        assertEquals(new HashMap<>(), actual);
    }

    @Test
    public void nullCases() {

        AAIResultWrapper wrapper = new AAIResultWrapper(null);

        assertEquals(Optional.empty(), wrapper.getRelationships());
        assertEquals("{}", wrapper.getJson());
        assertEquals(Optional.empty(), wrapper.asBean(GenericVnf.class));
        assertEquals(true, wrapper.asMap().isEmpty());
        assertEquals("{}", wrapper.toString());

    }

    @Test
    public void objectConstructor() {
        AAIResultWrapper wrapper = new AAIResultWrapper(new GenericVnf());
        assertEquals("{}", wrapper.getJson());
    }
}