/*
 * 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.jdbi.v3.core.internal;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
import java.util.stream.Stream;

import org.jdbi.v3.core.Jdbi;
import org.jdbi.v3.core.internal.exceptions.Unchecked;

public class OnDemandExtensions {
    private static final Method EQUALS_METHOD;
    private static final Method HASHCODE_METHOD;
    private static final Method TOSTRING_METHOD;

    static {
        try {
            EQUALS_METHOD = Object.class.getMethod("equals", Object.class);
            HASHCODE_METHOD = Object.class.getMethod("hashCode");
            TOSTRING_METHOD = Object.class.getMethod("toString");
        } catch (NoSuchMethodException wat) {
            throw new IllegalStateException("OnDemandExtensions initialization failed", wat);
        }
    }

    private OnDemandExtensions() {
        throw new UtilityClassException();
    }

    public static <E> E create(Jdbi db, Class<E> extensionType, Class<?>... extraTypes) {
        InvocationHandler handler = (proxy, method, args) -> {
            if (EQUALS_METHOD.equals(method)) {
                return proxy == args[0];
            }

            if (HASHCODE_METHOD.equals(method)) {
                return System.identityHashCode(proxy);
            }

            if (TOSTRING_METHOD.equals(method)) {
                return extensionType + "@" + Integer.toHexString(System.identityHashCode(proxy));
            }

            return db.withExtension(extensionType, extension -> invoke(extension, method, args));
        };

        Class<?>[] types = Stream.concat(Stream.of(extensionType), Arrays.stream(extraTypes)).toArray(Class[]::new);
        return extensionType.cast(Proxy.newProxyInstance(extensionType.getClassLoader(), types, handler));
    }

    private static Object invoke(Object target, Method method, Object[] args) {
        if (Proxy.isProxyClass(target.getClass())) {
            InvocationHandler handler = Proxy.getInvocationHandler(target);
            return Unchecked.<Object[], Object>function(params -> handler.invoke(target, method, params)).apply(args);
        } else {
            MethodHandle handle = Unchecked.function(MethodHandles.lookup()::unreflect).apply(method).bindTo(target);
            return Unchecked.<Object[], Object>function(handle::invokeWithArguments).apply(args);
        }
    }
}

@@ -2276,53 +2276,200 @@
 eam.
-of(extensionType), Arrays.stream(extraTypes))
+concat(%0A                Stream.of(extensionType),%0A                Arrays.stream(extensionType.getInterfaces())),%0A                Arrays.stream(extraTypes))%0A            .distinct()%0A            
 .toA

include all declared interfaces