package com.tcm.training.admin.live.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.tcm.training.admin.live.entity.LiveSession;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Update;

@Mapper
public interface LiveSessionMapper extends BaseMapper<LiveSession> {

    /**
     * 仅当场次仍处于未开始状态时，将其切换为直播中，保证人工开播与自动开播幂等。
     */
    @Update("UPDATE tcm_live_session " +
            "SET live_status = 1, " +
            "actual_start_time = CASE WHEN actual_start_time IS NULL THEN #{actualStartTime} ELSE actual_start_time END, " +
            "updated_at = NOW() " +
            "WHERE id = #{sessionId} AND deleted = 0 AND live_status = 0")
    int markLivingIfPending(@Param("sessionId") Long sessionId, @Param("actualStartTime") java.time.LocalDateTime actualStartTime);
}