/*
 * Copyright (c) 2017 Mockito contributors
 * This program is made available under the terms of the MIT License.
 */
package org.mockito.internal.configuration.plugins;

import java.util.HashMap;
import java.util.Map;

import org.mockito.internal.creation.instance.InstantiatorProvider2Adapter;
import org.mockito.plugins.*;

class DefaultMockitoPlugins implements MockitoPlugins {

    private static final Map<String, String> DEFAULT_PLUGINS = new HashMap<String, String>();
    static final String INLINE_ALIAS = "mock-maker-inline";
    static final String MODULE_ALIAS = "member-accessor-module";

    static {
        // Keep the mapping: plugin interface name -> plugin implementation class name
        DEFAULT_PLUGINS.put(PluginSwitch.class.getName(), DefaultPluginSwitch.class.getName());
        DEFAULT_PLUGINS.put(
                MockMaker.class.getName(),
                "org.mockito.internal.creation.bytebuddy.ByteBuddyMockMaker");
        DEFAULT_PLUGINS.put(
                StackTraceCleanerProvider.class.getName(),
                "org.mockito.internal.exceptions.stacktrace.DefaultStackTraceCleanerProvider");
        DEFAULT_PLUGINS.put(
                InstantiatorProvider2.class.getName(),
                "org.mockito.internal.creation.instance.DefaultInstantiatorProvider");
        DEFAULT_PLUGINS.put(
                AnnotationEngine.class.getName(),
                "org.mockito.internal.configuration.InjectingAnnotationEngine");
        DEFAULT_PLUGINS.put(
                INLINE_ALIAS, "org.mockito.internal.creation.bytebuddy.InlineByteBuddyMockMaker");
        DEFAULT_PLUGINS.put(
                MockitoLogger.class.getName(), "org.mockito.internal.util.ConsoleMockitoLogger");
        DEFAULT_PLUGINS.put(
                MemberAccessor.class.getName(),
                "org.mockito.internal.util.reflection.ReflectionMemberAccessor");
        DEFAULT_PLUGINS.put(
                MODULE_ALIAS, "org.mockito.internal.util.reflection.ModuleMemberAccessor");
    }

    @Override
    public <T> T getDefaultPlugin(Class<T> pluginType) {
        if (pluginType == InstantiatorProvider.class) {
            // the implementation class is not configured via map so that we can reduce duplication
            // (ensure that we are adapting the currently configured default implementation for
            // InstantiatorProvider2)
            String className = DEFAULT_PLUGINS.get(InstantiatorProvider2.class.getName());
            return pluginType.cast(
                    new InstantiatorProvider2Adapter(
                            create(InstantiatorProvider2.class, className)));
        } else {
            String className = DEFAULT_PLUGINS.get(pluginType.getName());
            return create(pluginType, className);
        }
    }

    String getDefaultPluginClass(String classOrAlias) {
        return DEFAULT_PLUGINS.get(classOrAlias);
    }

    /**
     * Creates an instance of given plugin type, using specific implementation class.
     */
    private <T> T create(Class<T> pluginType, String className) {
        if (className == null) {
            throw new IllegalStateException(
                    "No default implementation for requested Mockito plugin type: "
                            + pluginType.getName()
                            + "\n"
                            + "Is this a valid Mockito plugin type? If yes, please report this problem to Mockito team.\n"
                            + "Otherwise, please check if you are passing valid plugin type.\n"
                            + "Examples of valid plugin types: MockMaker, StackTraceCleanerProvider.");
        }
        try {
            // Default implementation. Use our own ClassLoader instead of the context
            // ClassLoader, as the default implementation is assumed to be part of
            // Mockito and may not be available via the context ClassLoader.
            return pluginType.cast(Class.forName(className).getDeclaredConstructor().newInstance());
        } catch (Exception e) {
            throw new IllegalStateException(
                    "Internal problem occurred, please report it. "
                            + "Mockito is unable to load the default implementation of class that is a part of Mockito distribution. "
                            + "Failed to load "
                            + pluginType,
                    e);
        }
    }

    @Override
    public MockMaker getInlineMockMaker() {
        return create(MockMaker.class, DEFAULT_PLUGINS.get(INLINE_ALIAS));
    }
}
