package com.zy.acs.manager.manager.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.zy.acs.manager.common.exception.BusinessException;
import com.zy.acs.manager.manager.entity.Sta;
import com.zy.acs.manager.manager.entity.StaReserve;
import com.zy.acs.manager.manager.entity.Task;
import com.zy.acs.manager.manager.enums.StaReserveStateType;
import com.zy.acs.manager.manager.enums.StaReserveType;
import com.zy.acs.manager.manager.enums.StatusType;
import com.zy.acs.manager.manager.mapper.StaMapper;
import com.zy.acs.manager.manager.mapper.StaReserveMapper;
import com.zy.acs.manager.manager.service.StaReserveService;
import com.zy.acs.manager.manager.service.StaService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.Optional;

@Service("staReserveService")
public class StaReserveServiceImpl extends ServiceImpl<StaReserveMapper, StaReserve> implements StaReserveService {

    public static final Long RESERVE_EXPIRE_TIME = 30 * 60 * 1000L;

    @Autowired
    private StaService staService;
    @Autowired
    private StaMapper staMapper;

    @Override
    @Transactional(rollbackFor = Exception.class)
    public StaReserve reserveStaIn(Sta sta, Task task, Integer qty) {
        qty = Optional.ofNullable(qty).orElse(1);

        // reserve sta in
        if (qty < staMapper.tryReserveIn(sta.getId(), qty)) {
            throw new BusinessException("Sta[" + sta.getStaNo() + "] can't reserve IN");
        }
        Date now = new Date();

        // save staReserve
        StaReserve reserve = new StaReserve();
        reserve.setStaId(sta.getId());
        reserve.setTaskId(task.getId());
        reserve.setType(StaReserveType.IN.toString());
        reserve.setQty(qty);
        reserve.setState(StaReserveStateType.RESERVED.toString());

        reserve.setUniqKey(this.generateReserveUniqKey(sta.getId(), task.getId()));
        reserve.setExpireTime(new Date(now.getTime() + RESERVE_EXPIRE_TIME));

        reserve.setStatus(StatusType.ENABLE.val);
        reserve.setCreateTime(now);
        reserve.setUpdateTime(now);

        if (!this.save(reserve)) {
            staMapper.releaseReserveIn(sta.getId(), qty);
            throw new BusinessException("reserve record insert failed");
        }

        return reserve;
    }


    private String generateReserveUniqKey(Long staId, Long taskId) {
        return "STA:" + staId + "-TASK:" + taskId + "-T";
    }

}