package com.common.mapper;

import com.common.entity.DeviceCollectHeartbeat;
import org.apache.ibatis.annotations.*;

import java.util.List;

/**
 * 探针心跳状态 Mapper 接口
 */
@Mapper
public interface DeviceCollectHeartbeatMapper {

    /**
     * 根据探针ID查询
     */
    @Select("SELECT * FROM device_collect_heartbeat WHERE collect_id = #{collectId}")
    DeviceCollectHeartbeat selectByCollectId(@Param("collectId") String collectId);

    /**
     * 查询所有探针
     */
    @Select("SELECT * FROM device_collect_heartbeat ORDER BY update_time DESC")
    List<DeviceCollectHeartbeat> selectAll();

    /**
     * 查询所有在线探针
     */
    @Select("SELECT * FROM device_collect_heartbeat WHERE status = 'online' ORDER BY update_time DESC")
    List<DeviceCollectHeartbeat> selectAllOnline();

    /**
     * 查询所有离线探针
     */
    @Select("SELECT * FROM device_collect_heartbeat WHERE status = 'offline' ORDER BY update_time DESC")
    List<DeviceCollectHeartbeat> selectAllOffline();

    /**
     * 插入或更新（根据collect_id）
     * 达梦数据库使用 MERGE INTO 实现 upsert
     */
    @Update("MERGE INTO device_collect_heartbeat t " +
            "USING (SELECT " +
            "#{collectId} AS collect_id, " +
            "#{collectName} AS collect_name, " +
            "#{deviceIp} AS device_ip, " +
            "#{appVersion} AS app_version, " +
            "#{lastHeartbeat} AS last_heartbeat, " +
            "#{heartbeatCount} AS heartbeat_count, " +
            "#{status} AS status, " +
            "#{failCount} AS fail_count, " +
            "#{updateTime} AS update_time " +
            "FROM DUAL) s " +
            "ON (t.collect_id = s.collect_id) " +
            "WHEN MATCHED THEN UPDATE SET " +
            "t.collect_name = s.collect_name, " +
            "t.device_ip = s.device_ip, " +
            "t.app_version = s.app_version, " +
            "t.last_heartbeat = s.last_heartbeat, " +
            "t.heartbeat_count = s.heartbeat_count, " +
            "t.status = s.status, " +
            "t.fail_count = s.fail_count, " +
            "t.update_time = s.update_time " +
            "WHEN NOT MATCHED THEN INSERT (" +
            "collect_id, collect_name, device_ip, app_version, last_heartbeat, " +
            "heartbeat_count, status, fail_count, update_time" +
            ") VALUES (" +
            "s.collect_id, s.collect_name, s.device_ip, s.app_version, s.last_heartbeat, " +
            "s.heartbeat_count, s.status, s.fail_count, s.update_time" +
            ")")
    int upsert(DeviceCollectHeartbeat heartbeat);

    /**
     * 更新探针状态
     */
    @Update("UPDATE device_collect_heartbeat SET " +
            "status = #{status}, fail_count = #{failCount}, update_time = #{updateTime} " +
            "WHERE collect_id = #{collectId}")
    int updateStatus(@Param("collectId") String collectId, 
                    @Param("status") String status, 
                    @Param("failCount") Integer failCount,
                    @Param("updateTime") java.time.LocalDateTime updateTime);

    /**
     * 查询超过指定时间未心跳的探针（用于检测离线）
     */
    @Select("SELECT * FROM device_collect_heartbeat " +
            "WHERE status = 'online' AND last_heartbeat < #{thresholdTime} " +
            "ORDER BY last_heartbeat ASC")
    List<DeviceCollectHeartbeat> selectOfflineCandidates(@Param("thresholdTime") java.time.LocalDateTime thresholdTime);

    /**
     * 删除指定日期之前的记录
     */
    @Delete("DELETE FROM device_collect_heartbeat WHERE update_time < #{beforeTime}")
    int deleteBeforeTime(@Param("beforeTime") java.time.LocalDateTime beforeTime);
}