/*
 * 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.skywalking.apm.plugin.micronaut.http.server;

import io.micronaut.http.HttpRequest;
import io.micronaut.http.MutableHttpResponse;
import org.apache.skywalking.apm.agent.core.context.tag.Tags;
import org.apache.skywalking.apm.agent.core.context.trace.AbstractSpan;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.EnhancedInstance;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.InstanceMethodsAroundInterceptor;
import org.apache.skywalking.apm.agent.core.plugin.interceptor.enhance.MethodInterceptResult;

import java.lang.reflect.Method;

import static org.apache.skywalking.apm.plugin.micronaut.http.server.MicronautCommons.cleanup;
import static org.apache.skywalking.apm.plugin.micronaut.http.server.MicronautCommons.collectHttpParam;

public class WriteFinalNettyResponseInterceptor implements InstanceMethodsAroundInterceptor {
    @Override
    public void beforeMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, MethodInterceptResult result) throws Throwable {

    }

    @Override
    public Object afterMethod(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Object ret) throws Throwable {
        MutableHttpResponse<?> message = (MutableHttpResponse<?>) allArguments[0];
        HttpRequest<?> request = (HttpRequest<?>) allArguments[1];
        request.getAttribute(MicronautCommons.SPAN_KEY)
                .map(span -> (AbstractSpan) span)
                .ifPresent(span -> {
                    int code = message.status().getCode();
                    Tags.HTTP_RESPONSE_STATUS_CODE.set(span, code);
                    if (code >= 400) {
                        span.errorOccurred();
                    }
                    //Activate HTTP parameters collecting automatically in the profiling context.
                    if (!MicronautHttpServerPluginConfig.Plugin.MicronautHttpServer.COLLECT_HTTP_PARAMS && span.isProfiling()) {
                        collectHttpParam((HttpRequest<?>) allArguments[1], span);
                    }
                    span.asyncFinish();
                });
        cleanup(request);
        return ret;
    }

    @Override
    public void handleMethodException(EnhancedInstance objInst, Method method, Object[] allArguments, Class<?>[] argumentsTypes, Throwable t) {
        cleanup((HttpRequest<?>) allArguments[1]);
    }

}
