/**
 * 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.fineract.infrastructure.core.diagnostics.performance.sampling.support;

import java.util.StringJoiner;
import lombok.RequiredArgsConstructor;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.fineract.infrastructure.core.diagnostics.performance.sampling.core.SamplingService;

@RequiredArgsConstructor
public class SamplingMethodInterceptor implements MethodInterceptor {

    private final SamplingService samplingService;

    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        Object aThis = invocation.getThis();
        if (aThis != null) {
            String samplingKey = invocation.getMethod().getName() + getFormattedArguments(invocation);
            return samplingService.sample(samplingKey, () -> {
                try {
                    return invocation.proceed();
                } catch (Throwable e) {
                    throw new RuntimeException(e);
                }
            });
        } else {
            return invocation.proceed();
        }
    }

    private String getFormattedArguments(MethodInvocation invocation) {
        Class<?>[] parameterTypes = invocation.getMethod().getParameterTypes();
        if (parameterTypes.length == 0) {
            return "";
        } else {
            StringJoiner stringJoiner = new StringJoiner(",");
            for (Class<?> parameterType : parameterTypes) {
                stringJoiner.add(parameterType.getSimpleName());
            }
            return "(" + stringJoiner + ")";
        }
    }
}
