namespace Admin.NET.Plugin.AiDOP.Entity.SmartOps;

/// <summary>
/// ETL 执行机实例注册表。每个连本库的后端进程注册一行并定期心跳，
/// 用于运维在页面上看清「有哪些进程连着这个库、各自属于哪个槽位、还活着没」。
///
/// <para><b>本表不再持有执行机指派</b>：指派在 <c>ado_etl_runner_designation</c>，
/// 指向的是 <see cref="SlotCode"/> 而不是某一行实例。原因见该表注释——
/// <c>instance_id</c> 是进程级标识，把角色挂上去会让每次重启都丢指派。</para>
///
/// <para><b>无租户列是刻意的</b>：实例是部署事实，不属于任何租户。
/// 本类不实现租户过滤接口，SqlSugar 不会给它加租户条件。</para>
/// </summary>
[SugarTable("ado_etl_instance", "ETL执行机实例注册")]
public class AdoEtlInstance
{
    [SugarColumn(ColumnName = "id", IsPrimaryKey = true, IsIdentity = true)]
    public long Id { get; set; }

    /// <summary>形如 <c>机器名:进程ID:启动时间</c>，见 <c>AidopInstanceIdentity</c>。唯一索引。</summary>
    [SugarColumn(ColumnName = "instance_id", Length = 200)]
    public string InstanceId { get; set; } = string.Empty;

    [SugarColumn(ColumnName = "machine_name", Length = 128)]
    public string MachineName { get; set; } = string.Empty;

    [SugarColumn(ColumnName = "process_id")]
    public int ProcessId { get; set; }

    [SugarColumn(ColumnName = "app_version", Length = 64, IsNullable = true)]
    public string AppVersion { get; set; }

    /// <summary>
    /// 本进程声明所属的部署槽位（来自 <c>AIDOP_ETL_SLOT</c> / <c>AiDOP:Jobs:Slot</c>），
    /// 未声明为 null。执行机判定就是拿它和指派表里的槽位比对。
    /// </summary>
    [SugarColumn(ColumnName = "slot_code", Length = 128, IsNullable = true)]
    public string SlotCode { get; set; }

    /// <summary>
    /// 遗留列，**不要再读写**。指派已迁到 <c>ado_etl_runner_designation.slot_code</c>，
    /// 执行机身份请用 <c>AidopJobGate.IsRunner</c> 或页面返回的派生值。
    ///
    /// <para>保留一个版本而不立即删列：升级窗口内可能仍有旧二进制在跑，
    /// 它们会继续读这一列；待全部实例升到槽位模型后再单独发版删除。</para>
    /// </summary>
    [SugarColumn(ColumnName = "is_runner")]
    public bool IsRunner { get; set; }

    [SugarColumn(ColumnName = "started_at")]
    public DateTime StartedAt { get; set; }

    /// <summary>最近一次心跳。页面据此判存活，超过心跳窗口即视为已下线。</summary>
    [SugarColumn(ColumnName = "last_heartbeat_at")]
    public DateTime LastHeartbeatAt { get; set; }

    [SugarColumn(ColumnName = "create_time")]
    public DateTime CreateTime { get; set; }

    [SugarColumn(ColumnName = "update_time")]
    public DateTime UpdateTime { get; set; }
}