package com.ard.work.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@EnableAsync
public class AsyncConfiguration {
    /**
     * 相机SDK专用异步线程池
     */
    @Bean("cameraSdkExecutor")
    public Executor cameraSdkExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 核心线程数：根据业务并发量调整
        executor.setCorePoolSize(10);
        // 最大线程数
        executor.setMaxPoolSize(50);
        // 队列容量
        executor.setQueueCapacity(500);
        // 线程空闲时间
        executor.setKeepAliveSeconds(60);
        // 线程名前缀
        executor.setThreadNamePrefix("camera-sdk-");
        // 拒绝策略：队列满时由调用线程执行（避免任务丢失）
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 初始化
        executor.initialize();
        return executor;
    }
    /**
     * 相机任务线程池（控制相机并发）
     */
    @Bean("cameraPTZExecutor")
    public ThreadPoolTaskExecutor cameraPTZExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(20);
        executor.setMaxPoolSize(50);
        executor.setQueueCapacity(200);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("camera-ptz-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

    /**
     * SDK调用线程池（防止SDK卡死拖垮主线程池）
     */
    @Bean("timeoutExecutor")
    public ThreadPoolTaskExecutor timeoutExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(50);
        executor.setMaxPoolSize(100);
        executor.setQueueCapacity(500);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("camera-timeout-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
        executor.initialize();
        return executor;
    }

    /**
     * WebSocket推送线程池（避免慢客户端阻塞调度线程）
     * DiscardOldestPolicy: 推送任务允许丢弃旧消息以保证实时性
     */
    @Bean("wsPushExecutor")
    public ThreadPoolTaskExecutor wsPushExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(4);
        executor.setMaxPoolSize(16);
        executor.setQueueCapacity(2000);
        executor.setKeepAliveSeconds(60);
        executor.setThreadNamePrefix("ws-push-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardOldestPolicy());
        executor.initialize();
        return executor;
    }
}