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

import com.openhis.web.outpatient.mapper.RegistrationMapper;
import com.openhis.web.outpatient.mapper.OrderMapper;
import com.openhis.web.outpatient.service.RegistrationService;
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 #574：在预约签到缴费成功后，调用 {@link RegistrationMapper#updateSlotStatusToPaid}
 * 将对应的 adm_schedule_slot.status 状态及时流转为 “3”(已取号)。
 *
 * 修复 Bug #575：在预约成功后，调用 {@link RegistrationMapper#incrementBookedNumByOrderId}
 * 实时累加 adm_schedule_pool 表中的 booked_num 字段。
 *
 * 该方法假设在支付成功的业务流程中被调用，确保状态同步。
 */
@Service
public class RegistrationServiceImpl implements RegistrationService {

    private final RegistrationMapper registrationMapper;
    private final OrderMapper orderMapper;

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

    /**
     * 预约签到缴费成功后处理逻辑
     *
     * @param orderId 订单ID
     */
    @Override
    @Transactional(rollbackFor = Exception.class)
    public void handlePaymentSuccess(Long orderId) {
        if (orderId == null) {
            throw new IllegalArgumentException("订单ID不能为空");
        }

        // 1. 更新订单状态为已支付（使用 OrderMapper 中新增的常量）
        int orderUpdated = orderMapper.updateOrderStatusToPaid(orderId, OrderMapper.ORDER_STATUS_PAID);
        if (orderUpdated == 0) {
            throw new RuntimeException("订单状态更新为已支付失败，orderId=" + orderId);
        }

        // 2. 获取订单关联的号源 slot_id
        Map<String, Object> order = orderMapper.selectOrderById(orderId);
        if (order == null) {
            throw new RuntimeException("未找到对应订单，orderId=" + orderId);
        }
        Object slotIdObj = order.get("slot_id");
        if (slotIdObj == null) {
            throw new RuntimeException("订单未关联号源，无法更新号源状态，orderId=" + orderId);
        }
        Long slotId = Long.valueOf(String.valueOf(slotIdObj));

        // 3. 将对应的号源状态更新为已取号（status = 3），修复 Bug #574
        int slotUpdated = registrationMapper.updateSlotStatusToPaid(slotId);
        if (slotUpdated == 0) {
            throw new RuntimeException("号源状态更新为已取号失败，slotId=" + slotId);
        }

        // 4. 同步累加排班池已预约数量，修复 Bug #575
        int poolUpdated = registrationMapper.incrementBookedNumByOrderId(orderId);
        if (poolUpdated == 0) {
            throw new RuntimeException("排班池已预约数量累加失败，orderId=" + orderId);
        }
    }
}