package cn.lihu.jh.module.ecg.service.queue;

import cn.lihu.jh.module.ecg.dal.dataobject.queue.QueueStatisticDO;
import cn.lihu.jh.module.ecg.dal.dataobject.room.RoomDO;
import cn.lihu.jh.module.ecg.dal.dataobject.room.RoomStatisticsDO;
import cn.lihu.jh.module.ecg.dal.mysql.room.RoomMapper;
import cn.lihu.jh.module.ecg.enums.QueueStatusEnum;
import lombok.Data;
import org.jetbrains.annotations.NotNull;
import org.springframework.stereotype.Service;
import org.springframework.validation.annotation.Validated;

import cn.lihu.jh.module.ecg.controller.admin.queue.vo.*;
import cn.lihu.jh.module.ecg.dal.dataobject.queue.QueueDO;
import cn.lihu.jh.framework.common.pojo.PageResult;
import cn.lihu.jh.framework.common.util.object.BeanUtils;

import cn.lihu.jh.module.ecg.dal.mysql.queue.queueMapper;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;

import java.util.HashMap;
import java.util.List;
import java.util.PriorityQueue;

import static cn.lihu.jh.framework.common.exception.util.ServiceExceptionUtil.exception;
import static cn.lihu.jh.module.ecg.enums.ErrorCodeConstants.*;

/**
 * 排队 Service 实现类
 *
 * @author 芋道源码
 */
@Service
@Validated
public class QueueServiceImpl implements QueueService {

    final static Integer MAX_QUEUE_NUM = 2;

    Integer  curSeqNum = 0;

    PriorityQueue<BedQueueBO> priorityQueue = new PriorityQueue<>();

    @Resource
    private queueMapper queueMapper;

    @Resource
    private RoomMapper roomMapper;

    @Override
    public Integer createqueue(QueueSaveReqVO createReqVO) {
        // 插入
        QueueDO queue = BeanUtils.toBean(createReqVO, QueueDO.class);
        queueMapper.insert(queue);
        // 返回
        return queue.getId();
    }

    @Override
    public void updatequeue(QueueSaveReqVO updateReqVO) {
        // 校验存在
        validatequeueExists(updateReqVO.getId());
        // 更新
        QueueDO updateObj = BeanUtils.toBean(updateReqVO, QueueDO.class);
        queueMapper.updateById(updateObj);
    }

    @Override
    public void deletequeue(Integer id) {
        // 校验存在
        validatequeueExists(id);
        // 删除
        queueMapper.deleteById(id);
    }

    private void validatequeueExists(Integer id) {
        if (queueMapper.selectById(id) == null) {
            throw exception(QUEUE_NOT_EXISTS);
        }
    }

    @Override
    public QueueDO getqueue(Integer id) {
        return queueMapper.selectById(id);
    }

    @Override
    public PageResult<QueueDO> getqueuePage(QueuePageReqVO pageReqVO) {
        return queueMapper.selectPage(pageReqVO);
    }

    @Override
    public List<QueueStatisticDO> queueStatistics(List<Byte> statusList) {
        return queueMapper.queueStatistic(statusList);
    }

    @Override
    public void queue(QueueSaveReqVO queueSaveReqVO) {
        BedQueueBO bedQueueBO = priorityQueue.peek();
        if (bedQueueBO.queueNum == bedQueueBO.maxQueueNum) {
            queueSaveReqVO.setStatus(QueueStatusEnum.WAITING.getStatus()); //排队中
        } else if (bedQueueBO.queueNum < bedQueueBO.maxQueueNum) {
            queueSaveReqVO.setStatus(QueueStatusEnum.READY.getStatus()); //候诊准备中
            queueSaveReqVO.setRoomNum(bedQueueBO.getRoomName());
            queueSaveReqVO.setBedNum(bedQueueBO.getBedNo());
            queueSaveReqVO.setSeqNum(curSeqNum++);
            QueueDO queue = BeanUtils.toBean(queueSaveReqVO, QueueDO.class);
            queueMapper.insert(queue);  // queue.getId();

            bedQueueBO.queueNum++;
        }
    }

    @PostConstruct
    private void initQueue() {
        List<RoomDO> roomDOList = roomMapper.simpleRoomList();
        List<BedQueueBO> bedQueueBOList = roomDOList.stream().map(item -> BeanUtils.toBean(item, BedQueueBO.class)).toList();

        bedQueueBOList.forEach(item -> {
            item.maxQueueNum = MAX_QUEUE_NUM;
            item.queueNum = 0;
            priorityQueue.add(item);
        });

        curSeqNum = queueMapper.getMaxSeqNum();
    }
}