package com.openhis.web.outpatient.mapper;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

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

/**
 * 门诊退号数据访问层
 * 修复 Bug #506：修正退号流程中多表状态更新 SQL，对齐 PRD 定义
 *
 * 新增：支付成功后号源状态流转为“已取”(status=3)的更新方法。
 */
@Mapper
public interface RegistrationCancelMapper {

    /**
     * 查询号源关联的排班池ID
     */
    @Select("SELECT id, pool_id, status, order_id FROM adm_schedule_slot WHERE order_id = #{orderId} LIMIT 1")
    Map<String, Object> selectSlotByOrderId(@Param("orderId") Long orderId);

    /**
     * 更新订单主表状态
     * 修复点：status=0, pay_status=3, cancel_time=NOW(), cancel_reason='诊前退号'
     */
    @Update("UPDATE order_main " +
            "SET status = 0, " +
            "    pay_status = 3, " +
            "    cancel_time = NOW(), " +
            "    cancel_reason = '诊前退号' " +
            "WHERE id = #{orderId}")
    int updateOrderStatus(@Param("orderId") Long orderId);

    /**
     * 回滚号源状态
     * 修复点：status=0(待约), order_id=NULL，释放号源供再次预约
     */
    @Update("UPDATE adm_schedule_slot " +
            "SET status = 0, " +
            "    order_id = NULL " +
            "WHERE order_id = #{orderId}")
    int rollbackSlotStatus(@Param("orderId") Long orderId);

    /**
     * 更新排班池版本与已约数
     * 修复点：version=version+1, booked_num=booked_num-1（修正此前版本中两者写反的问题）
     */
    @Update("UPDATE adm_schedule_pool " +
            "SET version = version + 1, " +
            "    booked_num = booked_num - 1 " +
            "WHERE id = (SELECT pool_id FROM adm_schedule_slot WHERE order_id = #{orderId} LIMIT 1)")
    int updatePoolAfterCancel(@Param("orderId") Long orderId);

    /**
     * 支付成功后，将号源状态置为“已取”(status=3)
     *
     * @param orderId 关联的挂号订单ID
     * @return 更新行数
     */
    @Update("UPDATE adm_schedule_slot " +
            "SET status = 3 " +               // 3 表示已取
            "WHERE order_id = #{orderId}")
    int updateSlotStatusToTaken(@Param("orderId") Long orderId);
}