namespace Monitor.Backend.Application;

/// <summary>Backend 的可调参数（保留期等也可以通过 settings 改，这里是默认值与硬上限）。</summary>
public sealed class BackendOptions
{
    /// <summary>数据目录：<c>monitor.db</c> 与 <c>raw/</c>。</summary>
    public string DataDirectory { get; set; } = "data";

    /// <summary>面板的对外地址（用于生成安装命令）。</summary>
    public string? PublicUrl { get; set; }

    public int Pbkdf2Iterations { get; set; } = 600_000;

    /// <summary>会话 Cookie 带 Secure 标记（只提供 HTTPS）。本机用 HTTP 调试时才关闭。</summary>
    public bool SecureCookies { get; set; } = true;

    /// <summary>
    /// 允许跨域调用 API 的前端来源，逗号分隔（如 <c>http://localhost:5173,https://panel.example.com</c>，或 <c>*</c>）；空 = 不允许，只有同源。
    /// 跨域只支持 Bearer 令牌（不带 Cookie），所以不影响会话的安全。
    /// </summary>
    public string? CorsOrigins { get; set; }

    public TimeSpan SessionLifetime { get; set; } = TimeSpan.FromHours(12);

    public int LoginAttemptsPerMinute { get; set; } = 10;

    public int RawRetentionDays { get; set; } = 30;

    public int TestRawRetentionDays { get; set; } = 90;

    public int Metric10sRetentionHours { get; set; } = 48;

    public int Metric1mRetentionDays { get; set; } = 30;

    public int Metric5mRetentionDays { get; set; } = 365;

    public int EventRetentionDays { get; set; } = 365;

    public int HostRetentionDays { get; set; } = 7;

    /// <summary>分钟窗口在结束之后再等一会儿，让迟到的块先到。</summary>
    public TimeSpan WindowGrace { get; set; } = TimeSpan.FromSeconds(60);

    public TimeSpan AnalysisPollInterval { get; set; } = TimeSpan.FromSeconds(5);

    public TimeSpan QueryTimeout { get; set; } = TimeSpan.FromSeconds(10);

    public int MaxSsePerClient { get; set; } = 4;

    public int MaxSseTopics { get; set; } = 32;

    public int MaxPointsPerSeries { get; set; } = 2000;

    public int MaxMetricsPerQuery { get; set; } = 32;

    public int MaxCompareAgents { get; set; } = 20;

    /// <summary>
    /// 测试方案里「固定时长」阶段（没有 <c>duration_s</c> 参数的，例如 connect、hold）的缩放比例，缺省 1。
    /// 只给自动化测试用：端到端测试里把 30 秒的阶段缩短，不用真等。
    /// </summary>
    public double PhaseDurationScale { get; set; } = 1.0;

    /// <summary>初始管理员（只在没有任何用户时创建）。</summary>
    public string? InitialAdminUser { get; set; }

    public string? InitialAdminPassword { get; set; }
}