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

import com.openhis.web.outpatient.mapper.OrderMapper;
import com.openhis.web.outpatient.mapper.RegistrationMapper;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Map;

/**
 * 门诊挂号业务实现
 *
 * 修复 Bug #506：
 *   门诊诊前退号后，医嘱（订单）状态被错误地更新为 'RETURNED'，与 PRD 中定义的
 *   'CANCELLED' 不符，导致后续业务（如费用结算、统计）异常。
 *
 *   解决方案：
 *   1. 在退号业务中调用 {@link OrderMapper#updateOrderStatusToCancelled(Long,String,String,String)}
 *      并显式传入 {@link OrderMapper#ORDER_STATUS_CANCELLED}。
 *   2. 保持原有的日志、费用回滚等逻辑不变，只替换状态更新的硬编码值。
 *
 *   同时保留原有的退号后费用回滚、排班号恢复等功能。
 */
@Service
public class RegistrationServiceImpl {

    private final RegistrationMapper registrationMapper;
    private final OrderMapper orderMapper;

    public RegistrationServiceImpl(RegistrationMapper registrationMapper,
                                   OrderMapper orderMapper) {
        this.registrationMapper = registrationMapper;
        this.orderMapper = orderMapper;
    }

    /**
     * 诊前退号（取消挂号）。
     *
     * @param registrationId 挂号主键
     * @param operator       操作人姓名
     * @param remark         备注
     * @return 统一返回结构
     */
    @Transactional(rollbackFor = Exception.class)
    public Map<String, Object> cancelRegistration(Long registrationId,
                                                  String operator,
                                                  String remark) {
        // 1. 更新挂号状态为已退号（此处保持原实现）
        registrationMapper.updateRegistrationStatusToCancelled(registrationId, operator, remark);

        // 2. 查询关联医嘱并统一更新为 PRD 定义的 CANCELLED 状态
        // 假设 registration 与 order 通过 registration_id 关联
        Long orderId = registrationMapper.selectOrderIdByRegistrationId(registrationId);
        if (orderId != null) {
            orderMapper.updateOrderStatusToCancelled(
                    orderId,
                    operator,
                    remark,
                    OrderMapper.ORDER_STATUS_CANCELLED
            );
        }

        // 3. 其它业务（如费用回滚、排班恢复）保持不变
        registrationMapper.rollbackFees(registrationId);
        registrationMapper.restoreScheduleSlot(registrationId);

        return Map.of("code", 0, "msg", "退号成功");
    }

    // 其它业务方法保持不变...
}