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/*
 * Copyright 2014 Avanza Bank AB
 *
 * 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 com.avanza.astrix.remoting.util;

import java.util.ArrayList;
import java.util.List;

import org.openspaces.remoting.SpaceRemotingResult;

import com.avanza.astrix.core.AstrixRemoteResult;
import com.avanza.astrix.core.CorrelationId;
import com.avanza.astrix.core.RemoteServiceInvocationException;
import com.avanza.astrix.core.ServiceInvocationException;
import com.gigaspaces.async.AsyncFuture;
import com.gigaspaces.async.AsyncFutureListener;
import com.gigaspaces.async.AsyncResult;

import rx.Observable;
import rx.Observable.OnSubscribe;
import rx.Subscriber;
import rx.functions.Func1;

/**
 * @author joasah
 */
public class GsUtil {
	
	@Deprecated
	public static  List> convertToAstrixRemoteResults(SpaceRemotingResult[] results) {
		List> converted = new ArrayList>(results.length);
		for (SpaceRemotingResult result : results) {
			if (result.getException() != null) {
				converted.add(AstrixRemoteResult.failure(toRuntimeException(result.getException()), CorrelationId.undefined()));
			} else {
				converted.add(AstrixRemoteResult.successful(result.getResult()));
			}
		}
		return converted;
	}
	
	private static ServiceInvocationException toRuntimeException(Throwable exception) {
		if (exception instanceof RuntimeException) {
			return (ServiceInvocationException) exception;
		} else {
			return new RemoteServiceInvocationException("Remote service threw exception: " + exception.getMessage(), exception.getClass().getName());
		}
	}
	
	public static  void subscribe(final AsyncFuture asyncFuture, final Subscriber t1) {
		asyncFuture.setListener(new AsyncFutureListener() {
			@Override
			public void onResult(AsyncResult result) {
				if (result.getException() == null) {
					t1.onNext(result.getResult());
					t1.onCompleted();
				} else {
					t1.onError(result.getException());
				}
			}
		});
	}

	public static  Func1>, Observable> asyncResultListToObservable() {
		return new Func1>, Observable>() {
			@Override
			public Observable call(final List> asyncRresults) {
				return Observable.create(new OnSubscribe() {
					@Override
					public void call(Subscriber subscriber) {
						for (AsyncResult asyncInvocationResponse : asyncRresults) {
							if (asyncInvocationResponse.getException() != null) {
								subscriber.onError(asyncInvocationResponse.getException());
								return;
							}
							subscriber.onNext(asyncInvocationResponse.getResult());
						}
						subscriber.onCompleted();
					}
				});
			}};
	}
	
}