using System.ComponentModel.DataAnnotations;

namespace AmtScanner.Api.Models;

/// <summary>
/// 远程访问临时 Token
/// </summary>
public class RemoteAccessToken
{
    [Key]
    public long Id { get; set; }
    
    /// <summary>
    /// 唯一 Token 字符串
    /// </summary>
    [Required]
    [MaxLength(64)]
    public string Token { get; set; } = string.Empty;
    
    /// <summary>
    /// 关联的设备 ID
    /// </summary>
    public long DeviceId { get; set; }
    
    /// <summary>
    /// 关联的设备
    /// </summary>
    public AmtDevice? Device { get; set; }
    
    /// <summary>
    /// 创建时间
    /// </summary>
    public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
    
    /// <summary>
    /// 过期时间
    /// </summary>
    public DateTime ExpiresAt { get; set; }
    
    /// <summary>
    /// 是否已使用（一次性 Token）
    /// </summary>
    public bool IsUsed { get; set; } = false;
    
    /// <summary>
    /// 使用时间
    /// </summary>
    public DateTime? UsedAt { get; set; }
    
    /// <summary>
    /// 最大使用次数（0 表示无限制）
    /// </summary>
    public int MaxUseCount { get; set; } = 1;
    
    /// <summary>
    /// 已使用次数
    /// </summary>
    public int UseCount { get; set; } = 0;
    
    /// <summary>
    /// 创建者备注
    /// </summary>
    [MaxLength(500)]
    public string? Note { get; set; }
    
    /// <summary>
    /// 检查 Token 是否有效
    /// </summary>
    public bool IsValid()
    {
        if (DateTime.UtcNow > ExpiresAt) return false;
        if (MaxUseCount > 0 && UseCount >= MaxUseCount) return false;
        return true;
    }
}