using System;

namespace StellaOps.Scanner.Reachability;

/// <summary>
/// Represents optional symbol metadata (mangled/demangled names, source, confidence).
/// Used to enrich reachability evidence without altering canonical IDs.
/// </summary>
public sealed record ReachabilitySymbol(
    string? Mangled,
    string? Demangled,
    string? Source,
    double? Confidence)
{
    public ReachabilitySymbol Trimmed()
        => new(
            TrimOrNull(Mangled),
            TrimOrNull(Demangled),
            NormalizeSource(Source),
            Confidence is null ? null : ClampConfidence(Confidence.Value));

    private static string? TrimOrNull(string? value)
        => string.IsNullOrWhiteSpace(value) ? null : value.Trim();

    private static string? NormalizeSource(string? source)
    {
        if (string.IsNullOrWhiteSpace(source))
        {
            return null;
        }

        return source.Trim().ToUpperInvariant();
    }

    private static double ClampConfidence(double value)
        => Math.Max(0.0, Math.Min(1.0, value));
}