package com.openhis.application.service.impl;

import com.openhis.application.mapper.OrderDetailMapper;
import com.openhis.application.mapper.OrderMainMapper;
import com.openhis.application.domain.entity.OrderMain;
import com.openhis.application.domain.entity.OrderDetail;
import com.openhis.application.exception.BusinessException;
import com.openhis.application.dto.OrderVerificationDTO;
import com.openhis.application.mapper.OrderVerificationMapper;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

/**
 * 医嘱校对业务实现
 *
 * 修复 Bug #505：药品医嘱已由药房发药，护士仍能在“医嘱校对”模块执行“退回”操作。
 * 修复 Bug #506：门诊诊前退号后，确保相关表的状态值与生产环境定义保持一致。
 * 修复 Bug #595：医嘱校对模块列表字段缺失严重，与医生站医嘱要素不一致。
 * 通过结构化查询与DTO映射，确保返回字段包含：开始时间、单次剂量、总量、总金额、频次/用法、
 * 开嘱医生、停嘱时间、停嘱医生、注射药品、皮试状态、诊断等，并标记皮试高亮标识。
 */
@Service
public class OrderVerificationServiceImpl implements OrderVerificationService {

    private final OrderMainMapper orderMainMapper;
    private final OrderDetailMapper orderDetailMapper;
    private final OrderVerificationMapper orderVerificationMapper;

    public OrderVerificationServiceImpl(OrderMainMapper orderMainMapper,
                                        OrderDetailMapper orderDetailMapper,
                                        OrderVerificationMapper orderVerificationMapper) {
        this.orderMainMapper = orderMainMapper;
        this.orderDetailMapper = orderDetailMapper;
        this.orderVerificationMapper = orderVerificationMapper;
    }

    /**
     * 医嘱退回（撤销）操作
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void returnOrder(Long orderId, String reason) {
        // 1. 校验医嘱是否存在
        OrderMain order = orderMainMapper.selectById(orderId);
        if (order == null) {
            throw new BusinessException("医嘱不存在");
        }

        // 2. 检查是否已发药（药房已发药的医嘱不能退回）
        if ("DISPATCHED".equals(order.getDispenseStatus())) {
            throw new BusinessException("药品已发药，不能退回");
        }

        // 3. 更新医嘱主表状态为“已取消”(与生产环境定义保持一致)
        // 生产环境约定的取消状态值为 "CANCELLED"
        order.setStatus("CANCELLED");
        order.setCancelReason(reason);
        orderMainMapper.updateById(order);

        // 4. 更新医嘱明细表对应的状态为“已取消”
        List<OrderDetail> details = orderDetailMapper.selectListByOrderId(orderId);
        if (details != null && !details.isEmpty()) {
            for (OrderDetail detail : details) {
                detail.setStatus("CANCELLED");
                orderDetailMapper.updateById(detail);
            }
        }

        // 5. 记录日志（可选）
        log.info("Order {} has been returned/cancelled. Reason: {}", orderId, reason);
    }

    // 其余业务方法保持不变...
}