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，
/// <c>is_runner=1</c> 的那一行是当前被指派跑定时 ETL 的实例。
///
/// <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>
///
/// <para><b>指派唯一性由写入侧保证</b>：置某行 <c>is_runner=1</c> 时必须在同一事务内
/// 把其余行置 0。不要依赖前端或唯一索引——「最多一行为 1」在 MySQL 里没有
/// 直接可用的约束表达（部分索引不支持）。</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>是否被指派为执行机。**只由人工指派写入**，注册器不会自行置 1。</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; }
}