/*
 * 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.shardingsphere.agent.plugin.metrics.core.advice;

import org.apache.shardingsphere.agent.api.advice.TargetAdviceMethod;
import org.apache.shardingsphere.agent.api.advice.TargetAdviceObject;
import org.apache.shardingsphere.agent.plugin.core.advice.AbstractInstanceMethodAdvice;
import org.apache.shardingsphere.agent.plugin.metrics.core.collector.MetricsCollectorRegistry;
import org.apache.shardingsphere.agent.plugin.metrics.core.collector.type.CounterMetricsCollector;
import org.apache.shardingsphere.agent.plugin.metrics.core.config.MetricCollectorType;
import org.apache.shardingsphere.agent.plugin.metrics.core.config.MetricConfiguration;
import org.apache.shardingsphere.infra.route.context.RouteContext;
import org.apache.shardingsphere.infra.route.context.RouteUnit;

import java.util.Arrays;

/**
 * Route result count advice.
 */
public final class RouteResultCountAdvice extends AbstractInstanceMethodAdvice {
    
    private final MetricConfiguration routedResultConfig = new MetricConfiguration("routed_result_total",
            MetricCollectorType.COUNTER, "Total count of routed result", Arrays.asList("object", "name"));
    
    @Override
    public void afterMethod(final TargetAdviceObject target, final TargetAdviceMethod method, final Object[] args, final Object result, final String pluginType) {
        if (null == result) {
            return;
        }
        for (RouteUnit each : ((RouteContext) result).getRouteUnits()) {
            MetricsCollectorRegistry.<CounterMetricsCollector>get(routedResultConfig, pluginType).inc("data_source", each.getDataSourceMapper().getActualName());
            each.getTableMappers().forEach(table -> MetricsCollectorRegistry.<CounterMetricsCollector>get(routedResultConfig, pluginType).inc("table", table.getActualName()));
        }
    }
}
