namespace Admin.NET.Plugin.AiDOP.Infrastructure.S8;

/// <summary>
/// S8-SEVERITY-FOLLOW-SERIOUS-STANDARDIZE-EXEC-1：S8 异常 severity 业务枚举。
/// 当前阶段只保留 FOLLOW（关注）/ SERIOUS（严重）两档；
/// 旧值 LOW/MEDIUM/HIGH/CRITICAL 仅作为 legacy 兼容输入，新写入必须落 FOLLOW/SERIOUS。
/// </summary>
public static class S8SeverityCode
{
    public const string Follow = "FOLLOW";
    public const string Serious = "SERIOUS";

    /// <summary>归一化：旧值/空值/新值 -> FOLLOW / SERIOUS。空值默认 FOLLOW。</summary>
    public static string Normalize(string? code)
    {
        if (string.IsNullOrWhiteSpace(code)) return Follow;
        return code.Trim().ToUpperInvariant() switch
        {
            "FOLLOW"   => Follow,
            "LOW"      => Follow,
            "MEDIUM"   => Follow,
            "SERIOUS"  => Serious,
            "HIGH"     => Serious,
            "CRITICAL" => Serious,
            _          => Follow,
        };
    }

    public static bool IsFollow(string? code) => Normalize(code) == Follow;
    public static bool IsSerious(string? code) => Normalize(code) == Serious;

    /// <summary>新值或旧值合法（用于 legacy 查询参数兼容）。</summary>
    public static bool IsValid(string? code)
    {
        if (string.IsNullOrWhiteSpace(code)) return false;
        return code.Trim().ToUpperInvariant() switch
        {
            "FOLLOW" or "SERIOUS" or "LOW" or "MEDIUM" or "HIGH" or "CRITICAL" => true,
            _ => false,
        };
    }

    public static string Label(string? code) => Normalize(code) switch
    {
        Serious => "严重",
        _       => "关注",
    };

    public static object[] Options() =>
        new[] { Follow, Serious }
            .Select(v => new { value = v, label = Label(v) })
            .ToArray<object>();
}