/*
 * Copyright (c) 2016 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.mdsal.binding.java.api.generator;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.reset;
import static org.opendaylight.mdsal.binding.generator.util.TypeConstants.PATTERN_CONSTANT_NAME;
import static org.opendaylight.mdsal.binding.java.api.generator.GeneratorUtil.createImports;

import com.google.common.collect.ImmutableList;
import java.lang.reflect.Constructor;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.opendaylight.mdsal.binding.java.api.generator.GeneratorUtil;
import org.opendaylight.mdsal.binding.model.api.AnnotationType;
import org.opendaylight.mdsal.binding.model.api.Constant;
import org.opendaylight.mdsal.binding.model.api.GeneratedProperty;
import org.opendaylight.mdsal.binding.model.api.GeneratedTransferObject;
import org.opendaylight.mdsal.binding.model.api.GeneratedType;
import org.opendaylight.mdsal.binding.model.api.MethodSignature;
import org.opendaylight.mdsal.binding.model.api.ParameterizedType;
import org.opendaylight.mdsal.binding.model.api.Type;

public class GeneratorUtilTest {

    private final GeneratedType generatedType = mock(GeneratedType.class);
    private final GeneratedTransferObject enclosedType = mock(GeneratedTransferObject.class);
    private final MethodSignature methodSignature = mock(MethodSignature.class);
    private final Type type = mock(Type.class);
    private final AnnotationType annotationType = mock(AnnotationType.class);
    private final MethodSignature.Parameter parameter = mock(MethodSignature.Parameter.class);
    private final GeneratedProperty property = mock(GeneratedProperty.class);
    private final ParameterizedType parameterizedType = mock(ParameterizedType.class);

    @Before
    public void setUp() {
        reset(enclosedType);

        doReturn("tst.package").when(parameterizedType).getPackageName();
        doReturn("tstParametrizedType").when(parameterizedType).getName();
        doReturn("tst.package").when(type).getPackageName();
        doReturn("tstName").when(type).getName();
        doReturn(parameterizedType).when(property).getReturnType();
        doReturn(new Type[] { type }).when(parameterizedType).getActualTypeArguments();
        doReturn(ImmutableList.of(property)).when(enclosedType).getProperties();
        doReturn(true).when(property).isReadOnly();
        doReturn("tst.package").when(enclosedType).getPackageName();
        doReturn("tstName").when(enclosedType).getName();
        doReturn(ImmutableList.of(parameter)).when(methodSignature).getParameters();

        doReturn("tst.package").when(annotationType).getPackageName();
        doReturn("tstAnnotationName").when(annotationType).getName();

        doReturn(type).when(parameter).getType();
        doReturn(type).when(methodSignature).getReturnType();
        doReturn(ImmutableList.of(annotationType)).when(methodSignature).getAnnotations();
        doReturn(ImmutableList.of(methodSignature)).when(enclosedType).getMethodDefinitions();

        final Constant constant = mock(Constant.class);
        doReturn(PATTERN_CONSTANT_NAME).when(constant).getName();
        doReturn(ImmutableList.of(constant)).when(enclosedType).getConstantDefinitions();

        doReturn(ImmutableList.of()).when(enclosedType).getEnclosedTypes();
        doReturn(ImmutableList.of(enclosedType)).when(generatedType).getEnclosedTypes();
    }

    @Test
    public void createChildImportsTest() throws Exception {
        doReturn("tst.package").when(enclosedType).getPackageName();
        doReturn("tstName").when(enclosedType).getName();
        doReturn(ImmutableList.of()).when(enclosedType).getEnclosedTypes();
        doReturn(ImmutableList.of(enclosedType)).when(generatedType).getEnclosedTypes();
        final Map<String, String> generated = GeneratorUtil.createChildImports(generatedType);
        assertNotNull(generated);
        assertTrue(generated.get("tstName").equals("tst.package"));
    }

    @Test(expected = UnsupportedOperationException.class)
    public void constructTest() throws Throwable {
        final Constructor constructor = GeneratorUtil.class.getDeclaredConstructor();
        constructor.setAccessible(true);
        try {
            constructor.newInstance();
        } catch (Exception e) {
            throw e.getCause();
        }
    }

    @Test(expected = IllegalArgumentException.class)
    public void createImportsWithExceptionTest() throws Exception {
        GeneratorUtil.createImports(null);
    }

    @Test
    public void createImportsTest() throws Exception {
        final Map<String, String> generated = createImports(generatedType);
        assertNotNull(generated);
        assertTrue(generated.get("tstAnnotationName").equals("tst.package"));
    }

    @Test(expected = IllegalArgumentException.class)
    public void isConstantToExceptionTest() throws Exception {
        GeneratorUtil.isConstantInTO(null, null);
    }

    @Test
    public void isConstantToTest() throws Exception {
        final Constant constant = mock(Constant.class);
        doReturn("tst2").when(constant).getName();
        doReturn(ImmutableList.of(constant)).when(enclosedType).getConstantDefinitions();
        assertFalse(GeneratorUtil.isConstantInTO("tst", enclosedType));
    }

    @Test
    public void getPropertiesOfAllParentsTest() throws Exception {
        final GeneratedTransferObject superType = mock(GeneratedTransferObject.class);
        doReturn(enclosedType).when(superType).getSuperType();
        assertTrue(GeneratorUtil.getPropertiesOfAllParents(superType).contains(property));
    }

    @Test
    public void getExplicitTypeTest() throws Exception {
        assertEquals(annotationType.getName(), GeneratorUtil.getExplicitType(
                generatedType, annotationType, createImports(generatedType)));

        assertTrue(GeneratorUtil.getExplicitType(generatedType, parameterizedType,
                createImports(generatedType)).contains(parameterizedType.getName()));

    }

    @Test(expected = IllegalArgumentException.class)
    public void getTopParentTransportObjectWithExceptionTest() throws Exception {
        GeneratorUtil.getTopParentTransportObject(null);
    }

    @Test
    public void getTopParentTransportObjectTest() throws Exception {
        assertEquals(enclosedType, GeneratorUtil.getTopParentTransportObject(enclosedType));

        final GeneratedTransferObject parent = mock(GeneratedTransferObject.class);
        doReturn(parent).when(enclosedType).getSuperType();
        assertEquals(parent, GeneratorUtil.getTopParentTransportObject(enclosedType));
    }
}