package com.openhis.web.outpatient.service.impl;

import com.openhis.web.outpatient.mapper.RegistrationCancelMapper;
import com.openhis.web.outpatient.service.RegistrationCancelService;
import com.openhis.web.inpatient.mapper.OrderMapper;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.util.Map;

/**
 * 门诊挂号退号业务实现
 * 修复 Bug #506：确保退号后 order_main、adm_schedule_slot、adm_schedule_pool、refund_log 状态与 PRD 严格一致
 * 以及在退号后统一调用 {@link OrderMapper#updateOrderStatusToCancelled} 将医嘱状态置为 PRD 定义的 “CANCELLED”。
 */
@Service
public class RegistrationCancelServiceImpl implements RegistrationCancelService {

    private final RegistrationCancelMapper cancelMapper;
    private final OrderMapper orderMapper;

    public RegistrationCancelServiceImpl(RegistrationCancelMapper cancelMapper,
                                         OrderMapper orderMapper) {
        this.cancelMapper = cancelMapper;
        this.orderMapper = orderMapper;
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void cancelRegistration(Long orderId, BigDecimal refundAmount) {
        if (orderId == null) {
            throw new IllegalArgumentException("订单ID不能为空");
        }

        // 1. 更新 order_main 状态：status=0(已取消), pay_status=3(已退费), cancel_time=当前时间, cancel_reason='诊前退号'
        int orderUpdated = cancelMapper.updateOrderStatus(orderId);
        if (orderUpdated == 0) {
            throw new RuntimeException("订单状态更新失败，请检查订单是否存在或已退号");
        }

        // 2. 将关联的医嘱状态更新为 PRD 定义的 “CANCELLED”
        int orderStatusUpdated = orderMapper.updateOrderStatusToCancelled(orderId, OrderMapper.ORDER_STATUS_CANCELLED);
        if (orderStatusUpdated == 0) {
            throw new RuntimeException("医嘱状态更新为 CANCELLED 失败，请检查医嘱是否存在或已被处理");
        }

        // 3. 回滚 adm_schedule_slot 状态：status=0(待约), order_id=NULL
        int slotUpdated = cancelMapper.rollbackSlotStatus(orderId);
        if (slotUpdated == 0) {
            throw new RuntimeException("号源回滚失败，请检查号源是否已被其他订单占用");
        }

        // 4. 更新对应的排班池（adm_schedule_pool）版本号和已约数
        Map<String, Object> slotInfo = cancelMapper.selectSlotByOrderId(orderId);
        if (slotInfo != null && slotInfo.get("pool_id") != null) {
            Long poolId = ((Number) slotInfo.get("pool_id")).longValue();
            int poolUpdated = cancelMapper.updatePoolAfterCancel(poolId);
            if (poolUpdated == 0) {
                throw new RuntimeException("排班池信息更新失败，请检查 pool_id 是否正确");
            }
        }

        // 5. 记录退费日志
        int logInserted = cancelMapper.insertRefundLog(orderId, refundAmount, "诊前退号退款");
        if (logInserted == 0) {
            throw new RuntimeException("退费日志插入失败");
        }

        // 6. 如有需要，可在此处加入对支付成功后号源状态流转为“已取”(status=3)的处理（已在 Mapper 中预留方法）。
    }
}