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/*
 * 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 io.microsphere.spring.context.event;

import io.microsphere.util.StopWatch;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.BeanNameAware;
import org.springframework.beans.factory.support.RootBeanDefinition;

import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.util.Objects;
import java.util.StringJoiner;

/**
 * Bean Time Statistics
 *
 * @author Mercy
 * @since 1.0.0
 */
public class BeanTimeStatistics implements BeanListener, BeanNameAware {

    private final StopWatch stopWatch = new StopWatch("spring.context.beans");

    private String beanName;

    @Override
    public boolean supports(String beanName) {
        return !isIgnoredBean(beanName);
    }

    @Override
    public void onBeanDefinitionReady(String beanName, RootBeanDefinition mergedBeanDefinition) {
        if (isIgnoredBean(beanName)) {
            return;
        }
        stopWatch.start("ready." + beanName);
    }

    @Override
    public void onBeforeBeanInstantiate(String beanName, RootBeanDefinition mergedBeanDefinition) {
        stopWatch.start("instantiation." + beanName);
    }

    @Override
    public void onBeforeBeanInstantiate(String beanName, RootBeanDefinition mergedBeanDefinition, Constructor constructor, Object[] args) {
        stopWatch.start("instantiation." + beanName);
    }

    @Override
    public void onBeforeBeanInstantiate(String beanName, RootBeanDefinition mergedBeanDefinition, Object factoryBean, Method factoryMethod, Object[] args) {
        stopWatch.start("instantiation." + beanName);
    }

    @Override
    public void onAfterBeanInstantiated(String beanName, RootBeanDefinition mergedBeanDefinition, Object bean) {
        stopWatch.stop();
    }

    @Override
    public void onBeanPropertyValuesReady(String beanName, Object bean, PropertyValues pvs) {
    }

    @Override
    public void onBeforeBeanInitialize(String beanName, Object bean) {
        stopWatch.start("initialization." + beanName);
    }

    @Override
    public void onAfterBeanInitialized(String beanName, Object bean) {
        stopWatch.stop();
    }

    @Override
    public void onBeanReady(String beanName, Object bean) {
        if (isIgnoredBean(beanName)) {
            return;
        }
        stopWatch.stop();
    }

    @Override
    public void onBeforeBeanDestroy(String beanName, Object bean) {
        stopWatch.start("destroy." + beanName);
    }

    @Override
    public void onAfterBeanDestroy(String beanName, Object bean) {
        stopWatch.stop();
    }

    public StopWatch getStopWatch() {
        return stopWatch;
    }

    @Override
    public String toString() {
        return new StringJoiner(", ", BeanTimeStatistics.class.getSimpleName() + "[", "]")
                .add(stopWatch.toString())
                .toString();
    }

    private boolean isIgnoredBean(String beanName) {
        return Objects.equals(this.beanName, beanName);
    }

    @Override
    public void setBeanName(String name) {
        this.beanName = name;
    }
}