package com.nexo.common.core.config;

import cn.hutool.core.util.ArrayUtil;
import com.nexo.common.core.exception.ServiceException;
import com.nexo.common.core.utils.SpringUtils;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.boot.autoconfigure.AutoConfiguration;
import org.springframework.context.annotation.Bean;
import org.springframework.scheduling.annotation.AsyncConfigurerSupport;
import org.springframework.scheduling.annotation.EnableAsync;

import java.util.Arrays;
import java.util.concurrent.*;

/**
 * 异步配置
 *
 * @author Lion Li
 */
@Slf4j
@EnableAsync(proxyTargetClass = true)
@AutoConfiguration
public class AsyncConfig extends AsyncConfigurerSupport {

    private static final int CORE_POOL_SIZE = 10;

    /**
     * 执行周期性或定时任务
     */
    @Bean(name = "scheduledExecutorService")
    public ScheduledExecutorService scheduledExecutorService() {
        return new ScheduledThreadPoolExecutor(CORE_POOL_SIZE,
            new BasicThreadFactory.Builder().namingPattern("schedule-pool-%d").daemon(true).build(),
            new ThreadPoolExecutor.CallerRunsPolicy()) {
            @Override
            protected void afterExecute(Runnable r, Throwable t) {
                super.afterExecute(r, t);
                printException(r, t);
            }
        };
    }

    /**
     * 自定义 @Async 注解使用系统线程池
     */
    @Override
    public Executor getAsyncExecutor() {
        return SpringUtils.getBean("scheduledExecutorService");
    }

    /**
     * 异步执行异常处理
     */
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return (throwable, method, objects) -> {
            throwable.printStackTrace();
            StringBuilder sb = new StringBuilder();
            sb.append("Exception message - ").append(throwable.getMessage())
                .append(", Method name - ").append(method.getName());
            if (ArrayUtil.isNotEmpty(objects)) {
                sb.append(", Parameter value - ").append(Arrays.toString(objects));
            }
            throw new ServiceException(sb.toString());
        };
    }

    /**
     * 打印线程异常信息
     */
    public void printException(Runnable r, Throwable t) {
        if (t == null && r instanceof Future<?>) {
            try {
                Future<?> future = (Future<?>) r;
                if (future.isDone()) {
                    future.get();
                }
            } catch (CancellationException ce) {
                t = ce;
            } catch (ExecutionException ee) {
                t = ee.getCause();
            } catch (InterruptedException ie) {
                Thread.currentThread().interrupt();
            }
        }
        if (t != null) {
            log.error(t.getMessage(), t);
        }
    }

}
