/*-
 * ============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.bpmn.common;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.mock;
import java.io.Serializable;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.camunda.bpm.extension.mockito.delegate.DelegateExecutionFake;
import org.hamcrest.collection.IsIterableContainingInOrder;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.onap.so.bpmn.common.exceptions.MalformedBuildingBlockInputException;
import org.onap.so.bpmn.common.exceptions.MissingBuildingBlockInputException;
import org.onap.so.bpmn.common.exceptions.RequiredExecutionVariableExeception;
import org.onap.so.bpmn.servicedecomposition.entities.GeneralBuildingBlock;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class DelegateExecutionImplTest {

    @Rule
    public ExpectedException thrown = ExpectedException.none();


    @Test
    public void getVariable() throws RequiredExecutionVariableExeception {
        final Map<String, Serializable> map = new HashMap<>();
        map.put("var1", "value1");
        map.put("var2", "value2");
        map.put("list1", (Serializable) Arrays.asList("value1", "value2"));
        final DelegateExecutionImpl impl = create(map);

        assertEquals("value1", impl.getVariable("var1"));
        assertEquals("value2", impl.getRequiredVariable("var2"));
        assertThat(impl.getVariable("list1"), IsIterableContainingInOrder.contains("value1", "value2"));

    }


    @Test
    public void getRequiredVariableNotFound() throws RequiredExecutionVariableExeception {
        final DelegateExecutionImpl impl = create();

        thrown.expect(RequiredExecutionVariableExeception.class);
        impl.getRequiredVariable("var1");
    }


    @Test
    public void setVariable() {
        final DelegateExecutionImpl impl = create();
        impl.setVariable("var1", "value1");

        assertEquals("value1", impl.get("var1"));
    }

    @Test
    public void getGeneralBuildingBlock() {
        final GeneralBuildingBlock gBB = mock(GeneralBuildingBlock.class);
        final Map<String, Serializable> map = new HashMap<>();
        map.put("gBBInput", gBB);
        final DelegateExecutionImpl impl = create(map);

        assertEquals(gBB, impl.getGeneralBuildingBlock());
    }

    @Test
    public void getGeneralBuildingBlockNotFound() {
        final DelegateExecutionImpl impl = create();
        thrown.expect(MissingBuildingBlockInputException.class);
        impl.getGeneralBuildingBlock();
    }

    @Test
    public void getGeneralBuildingBlockCastException() {
        final Map<String, Serializable> map = new HashMap<>();
        map.put("gBBInput", new DelegateExecutionFake());
        final DelegateExecutionImpl impl = create(map);

        thrown.expect(MalformedBuildingBlockInputException.class);
        impl.getGeneralBuildingBlock();
    }

    @Test
    public void getDelegateExecution() {
        final DelegateExecutionImpl impl = create();

        assertNotNull(impl.getDelegateExecution());
    }

    @Test
    public void getLookupMap() {
        final Map<String, Serializable> lookup = new HashMap<>();
        final Map<String, Serializable> map = new HashMap<>();
        map.put("lookupKeyMap", (Serializable) lookup);
        final DelegateExecutionImpl impl = create(map);

        assertEquals(lookup, impl.getLookupMap());
    }

    @Test
    public void testDelegateExecutionImpl_serializeDelegateExecutionImplObject_shouldNotThrowAnyExceptionWhenSerializing() {
        final DelegateExecutionImpl objectUnderTest = create();

        try {
            final ObjectMapper objectMapper = new ObjectMapper();
            objectMapper.writeValueAsString(objectUnderTest);
        } catch (final JsonProcessingException e) {
            fail("Should be possible to serialize DelegateExecutionImpl object");
        }

    }

    private DelegateExecutionImpl create() {
        return create(new HashMap<String, Serializable>());
    }

    private DelegateExecutionImpl create(final Map<String, Serializable> map) {
        final DelegateExecutionFake fake = new DelegateExecutionFake();

        for (final Entry<String, Serializable> entry : map.entrySet()) {
            fake.setVariable(entry.getKey(), entry.getValue());
        }
        return new DelegateExecutionImpl(fake);
    }

}