package com.glxp.api.task;

import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.thread.ExecutorBuilder;
import cn.hutool.core.thread.ThreadUtil;
import com.glxp.api.dao.inv.InvRemindSetDao;
import com.glxp.api.dao.schedule.ScheduledDao;
import com.glxp.api.entity.inv.InvRemindSetEntity;
import com.glxp.api.entity.system.ScheduledEntity;
import com.glxp.api.req.system.ScheduledRequest;
import com.glxp.api.service.inv.InvRemindMsgService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.LinkedBlockingDeque;

/**
 * 库存预警定时任务
 */
@Slf4j
@Component
public class InvRemindMsgTask implements SchedulingConfigurer {

    @Resource
    private ScheduledDao scheduledDao;
    @Resource
    private InvRemindMsgService invRemindMsgService;
    @Resource
    private InvRemindSetDao invRemindSetDao;

    private static ExecutorService executor;

    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        taskRegistrar.addTriggerTask(this::process, triggerContext -> {
            ScheduledRequest scheduledRequest = new ScheduledRequest();
            scheduledRequest.setCronName("invRemindMsgTask");
            ScheduledEntity scheduled = scheduledDao.findScheduled(scheduledRequest);
            if (null == scheduled) {
                log.error("库存预警定时任务未配置，请注意！");
                return null;
            }
            String cron = scheduled.getCron();
            initExecutor();
            return new CronTrigger(cron).nextExecutionTime(triggerContext);
        });
    }

    private void initExecutor() {
        executor = ExecutorBuilder.create()
                .setCorePoolSize(10)
                .setMaxPoolSize(300)
                .setWorkQueue(new LinkedBlockingDeque<>())
                .build();
    }

    private void process() {
        log.info("开始扫描库存信息，生成库存预警消息");
        List<InvRemindSetEntity> invRemindSetEntities = invRemindSetDao.selectList(null);
        if (CollUtil.isNotEmpty(invRemindSetEntities)) {
            log.info("库存预警设置条数：{}", invRemindSetEntities.size());
            //开始生成库存信息
            for (InvRemindSetEntity invRemindSetEntity : invRemindSetEntities) {
                executor.execute(ThreadUtil.newThread(() -> invRemindMsgService.createRemindMsg(invRemindSetEntity), "createInvRemindThread"));
            }
        } else {
            log.info("无库存预警设置，结束库存扫描");
        }
    }
}