/*
 * 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.apisix.plugin.runner.filter;

import java.util.concurrent.CompletableFuture;

import org.apache.apisix.plugin.runner.PostRequest;
import org.apache.apisix.plugin.runner.PostResponse;
import org.springframework.stereotype.Component;

@Component
public class AsyncResponseFilter implements PluginFilter {
    @Override
    public String name() {
        return "AsyncResponseFilter";
    }

    @Override
    public void postFilter(PostRequest request, PostResponse response, PluginFilterChain chain) {
        callExternalService()
            .thenAccept(body -> {
                response.setBody(body);
                chain.postFilter(request, response);
            });
    }

    // This simulates calls to an external service
    CompletableFuture<String> callExternalService() {
        return CompletableFuture.completedFuture("response_body");
    }
}
