using System;
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namespace Aging.Infrastructure.Contracts
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{
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/// <summary>
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/// 所有者类型枚举
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/// </summary>
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public enum OwnerType
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{
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/// <summary>
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/// 生产模式（正常老化测试流程）
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/// </summary>
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Production,
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/// <summary>
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/// 维护模式（调试/维护会话）
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/// </summary>
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Maintenance
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}
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/// <summary>
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/// 所有者令牌，标识资源预约的归属。
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/// 用于区分不同会话对硬件资源的所有权。
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/// </summary>
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public sealed class ResourceOwnerToken
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{
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/// <summary>
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/// 令牌唯一标识
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/// </summary>
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public string TokenId { get; }
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/// <summary>
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/// 所有者类型（生产/维护）
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/// </summary>
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public OwnerType OwnerType { get; }
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/// <summary>
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/// 所有者标识（RunID 或 DebugSessionID）
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/// </summary>
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public string OwnerId { get; }
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/// <summary>
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/// 世代号，每次新预约递增，防止重放攻击
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/// </summary>
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public long Generation { get; set; }
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/// <summary>
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/// 令牌签发时间
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/// </summary>
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public DateTime IssuedAt { get; }
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/// <summary>
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/// 令牌过期时间（可选）
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/// </summary>
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public DateTime? ExpiresAt { get; }
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/// <summary>
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/// 初始化所有者令牌实例
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/// </summary>
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/// <param name="ownerType">所有者类型</param>
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/// <param name="ownerId">所有者标识</param>
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/// <param name="expiresAt">过期时间（可选）</param>
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public ResourceOwnerToken(OwnerType ownerType, string ownerId, DateTime? expiresAt = null)
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{
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TokenId = Guid.NewGuid().ToString();
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OwnerType = ownerType;
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OwnerId = ownerId ?? throw new ArgumentNullException(nameof(ownerId));
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Generation = 0;
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IssuedAt = DateTime.UtcNow;
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ExpiresAt = expiresAt;
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}
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/// <summary>
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/// 检查令牌是否已过期
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/// </summary>
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/// <returns>过期返回 true；未设置过期时间或尚未过期返回 false</returns>
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public bool IsExpired()
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{
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if (!ExpiresAt.HasValue)
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return false;
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return DateTime.UtcNow > ExpiresAt.Value;
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}
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}
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}
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