package com.fuyuanshen.global.queue;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.fuyuanshen.common.core.constant.GlobalConstants;
import com.fuyuanshen.common.core.utils.StringUtils;
import com.fuyuanshen.common.redis.utils.RedisUtils;
import com.fuyuanshen.equipment.domain.Device;
import com.fuyuanshen.equipment.mapper.DeviceMapper;
import com.fuyuanshen.global.mqtt.constants.DeviceRedisKeyConstants;
import jakarta.annotation.PostConstruct;
import jakarta.annotation.PreDestroy;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;

import static com.fuyuanshen.global.mqtt.constants.DeviceRedisKeyConstants.DEVICE_KEY_PREFIX;

@Service
@Slf4j
public class MqttMessageConsumer {

    @Autowired
    private DeviceMapper deviceMapper;
    
    // 创建两个线程池：一个用于消息获取，一个用于业务处理
    private ExecutorService messageConsumerPool = Executors.newFixedThreadPool(3);
    private ExecutorService messageProcessorPool = Executors.newFixedThreadPool(10);

    // 初始化方法，启动消息监听
    @PostConstruct
    public void start() {
        log.info("启动MQTT消息消费者...");
        // 启动消息获取线程
        for (int i = 0; i < 3; i++) {
            messageConsumerPool.submit(this::consumeMessages);
        }
    }

    // 销毁方法，关闭线程池
    @PreDestroy
    public void stop() {
        log.info("关闭MQTT消息消费者...");
        shutdownExecutorService(messageConsumerPool);
        shutdownExecutorService(messageProcessorPool);
    }

    private void shutdownExecutorService(ExecutorService executorService) {
        if (executorService != null && !executorService.isShutdown()) {
            executorService.shutdown();
            try {
                if (!executorService.awaitTermination(60, TimeUnit.SECONDS)) {
                    executorService.shutdownNow();
                }
            } catch (InterruptedException e) {
                executorService.shutdownNow();
                Thread.currentThread().interrupt();
            }
        }
    }

    // 消费者方法 - 专门负责从队列获取消息
    public void consumeMessages() {
        String queueKey = MqttMessageQueueConstants.MQTT_MESSAGE_QUEUE_KEY;
        String threadName = Thread.currentThread().getName();
//        log.info("消息消费者线程 {} 开始监听队列: {}", threadName, queueKey);
        
        try {
            while (!Thread.currentThread().isInterrupted() && !messageConsumerPool.isShutdown()) {
                // 阻塞式获取队列中的消息
                String message = RedisUtils.pollDeduplicated(
                    queueKey, 
                    MqttMessageQueueConstants.MQTT_MESSAGE_DEDUP_KEY, 
                    1, 
                    TimeUnit.SECONDS
                );
                
                if (message != null) {
//                    log.info("线程 {} 从队列中获取到消息，提交到处理线程池: {}", threadName, message);
                    // 将消息处理任务提交到处理线程池
                    messageProcessorPool.submit(() -> processMessage(message));
                }
            }
        } catch (Exception e) {
            log.error("线程 {} 消费消息时发生错误", threadName, e);
        }
        
        log.info("消息消费者线程 {} 停止监听队列", threadName);
    }

    // 处理具体业务逻辑的方法
    private void processMessage(String message) {
        String threadName = Thread.currentThread().getName();
        try {
            log.info("业务处理线程 {} 开始处理消息: {}", threadName, message);
//            String deviceOnlineStatusRedisKey = GlobalConstants.GLOBAL_REDIS_KEY+ DEVICE_KEY_PREFIX+ message + DeviceRedisKeyConstants.DEVICE_ONLINE_STATUS_KEY_PREFIX ;
//            String deviceOnlineStatusRedis = RedisUtils.getCacheObject(deviceOnlineStatusRedisKey);
//            if(StringUtils.isBlank(deviceOnlineStatusRedis)){
//                UpdateWrapper<Device> updateWrapper = new UpdateWrapper<>();
//                updateWrapper.eq("device_imei", message)
//                        .set("online_status", 1);
//                deviceMapper.update(updateWrapper);
//            }
            QueryWrapper<Device> queryWrapper = new QueryWrapper<>();
            queryWrapper.eq("device_imei", message);
            queryWrapper.eq("online_status", 1);
            Long count = deviceMapper.selectCount(queryWrapper);
            if(count == 0){
                UpdateWrapper<Device> updateWrapper = new UpdateWrapper<>();
                updateWrapper.eq("device_imei", message)
                        .set("online_status", 1);
                deviceMapper.update(updateWrapper);
            }
            // 模拟业务处理耗时
//            Thread.sleep(200);
            
            log.info("业务处理线程 {} 完成消息处理: {}", threadName, message);
        } catch (Exception e) {
            log.error("业务处理线程 {} 处理消息时发生错误: {}", threadName, message, e);
        }
    }
}