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/*
 *   Copyright 2016 the original author or authors.
 *
 *   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.
 *
 */
package org.powermock.api.mockito.mockmaker;

import org.mockito.Mockito;
import org.mockito.invocation.Invocation;
import org.mockito.invocation.InvocationContainer;
import org.mockito.invocation.MockHandler;
import org.mockito.mock.MockCreationSettings;
import org.mockito.plugins.MockMaker;
import org.powermock.api.mockito.invocation.MockitoMethodInvocationControl;
import org.powermock.configuration.GlobalConfiguration;
import org.powermock.core.MockRepository;

/**
 * A PowerMock implementation of the MockMaker.
 */
public class PowerMockMaker implements MockMaker {
    private final MockMaker mockMaker;
    
    public PowerMockMaker() {
        mockMaker = new MockMakerLoader().load(GlobalConfiguration.mockitoConfiguration());
    }
    
    @Override
    public  T createMock(MockCreationSettings settings, MockHandler handler){
        return mockMaker.createMock(settings, handler);
    }
    
    @Override
    public MockHandler getHandler(Object mock) {
        if (mock instanceof Class) {
            return staticMockHandler((Class) mock);
        } else {
            return instanceMockHandler(mock);
        }
    }
    
    private MockHandler instanceMockHandler(final Object mock) {
        return mockMaker.getHandler(getRealMock(mock));
    }
    
    private Object getRealMock(final Object mock) {
        final MockitoMethodInvocationControl invocationControl = (MockitoMethodInvocationControl) MockRepository.getInstanceMethodInvocationControl(mock);
        final Object realMock;
        if (invocationControl == null){
            realMock = mock;
        }else{
            realMock = invocationControl.getMockHandlerAdaptor().getMock();

        }
        return realMock;
    }
    
    private MockHandler staticMockHandler(final Class mock) {
        return new StaticMockHandler(createStaticMockSettings(mock));
    }
    
    @Override
    public void resetMock(Object mock, MockHandler newHandler, MockCreationSettings settings) {
        mockMaker.resetMock(mock, newHandler, settings);
    }
    
    @Override
    public TypeMockability isTypeMockable(Class type) {
        return mockMaker.isTypeMockable(type);
    }
    
    MockMaker getMockMaker() {
        return mockMaker;
    }
    
    @SuppressWarnings("unchecked")
    private MockCreationSettings createStaticMockSettings(final Class mock) {
        return Mockito.withSettings()
                      .name(mock.getName())
                      .build((Class) mock);
    }
    
    private static class StaticMockHandler implements MockHandler {
        private final MockCreationSettings mockSettings;
        
        private StaticMockHandler(final MockCreationSettings mockSettings) {
            this.mockSettings = mockSettings;
        }
        
        @Override
        public MockCreationSettings getMockSettings() {
            return mockSettings;
        }
        
        @Override
        public InvocationContainer getInvocationContainer() {
            return null;
        }
        
        @Override
        public Object handle(Invocation invocation) throws Throwable {
            return null;
        }
    }
}