namespace StellaOps.DistroIntel;

public static partial class DistroMappings
{
    /// <summary>
    /// Checks if a distro is a known canonical (parent) distro.
    /// </summary>
    /// <param name="distro">The distro identifier to check.</param>
    /// <returns>True if the distro is a known canonical distro.</returns>
    public static bool IsCanonicalDistro(string distro)
    {
        var lower = distro.ToLowerInvariant();
        return lower is "rhel" or "debian" or "ubuntu" or "sles" or "alpine";
    }

    /// <summary>
    /// Normalizes a distro name to its canonical form.
    /// </summary>
    /// <param name="distro">The distro name to normalize.</param>
    /// <returns>Lowercase canonical form.</returns>
    public static string NormalizeDistroName(string distro)
    {
        var lower = distro.ToLowerInvariant();
        return lower switch
        {
            "redhat" or "red hat" or "red-hat" => "rhel",
            "alma" or "almalinux-os" => "almalinux",
            "rockylinux" or "rocky-linux" => "rocky",
            "oracle linux" or "oraclelinux" => "oracle",
            "opensuse" or "opensuse-tumbleweed" => "opensuse-leap",
            "mint" => "linuxmint",
            "popos" or "pop_os" => "pop",
            _ => lower
        };
    }
}