/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.plc4x.java.spi.messages;

import org.apache.plc4x.java.api.messages.PlcRequest;
import org.apache.plc4x.java.api.messages.PlcResponse;

import java.util.Objects;
import java.util.concurrent.CompletableFuture;

/**
 * Helper mostly used internally to split up big requests into multiple sub-requests.
 *
 * @param <T> type of request.
 * @param <R> type of response.
 */
public class PlcRequestContainer<T extends PlcRequest, R extends PlcResponse> implements PlcProtocolMessage {

    private final T request;
    private final CompletableFuture<R> responseFuture;

    public PlcRequestContainer(T request, CompletableFuture<R> responseFuture) {
        Objects.requireNonNull(request, "Request must not be null");
        Objects.requireNonNull(responseFuture, "Response future must not be null");
        this.request = request;
        this.responseFuture = responseFuture;
    }

    public T getRequest() {
        return request;
    }

    public CompletableFuture<R> getResponseFuture() {
        return responseFuture;
    }

    /**
     * {@link PlcRequestContainer} objects don't have parents.
     *
     * @return null
     */
    @Override
    public PlcProtocolMessage getParent() {
        return null;
    }

    @Override
    public String toString() {
        return "PlcRequestContainer{" +
            "request=" + request +
            '}';
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof PlcRequestContainer)) {
            return false;
        }
        PlcRequestContainer<?, ?> that = (PlcRequestContainer<?, ?>) o;
        return Objects.equals(request, that.request) &&
            Objects.equals(responseFuture, that.responseFuture);
    }

    @Override
    public int hashCode() {
        return Objects.hash(request, responseFuture);
    }

}
