namespace Nonemm.Spotting.Telnet;

/// Reads what a cluster node is asking for at login. Every node asks in its own
/// words; these are the ones DXSpider, AR-Cluster, CC Cluster and DXNet use.
public static class ClusterPrompts
{
    private static readonly string[] Callsign =
    [
        "login", "log in", "logon", "enter call", "enter your call",
        "your call", "callsign", "call:", "user:",
    ];

    private static readonly string[] Password = ["password"];

    public static bool AsksForCallsign(string text) => Holds(text, Callsign);

    public static bool AsksForPassword(string text) => Holds(text, Password);

    /// Which cluster program said this, or `Unknown` when the text names none
    /// of them. The words are the ones N1MM looks for in the banner.
    public static ClusterKind KindOf(string text)
    {
        if (Holds(text, ["gocluster"]))
        {
            return ClusterKind.GoCluster;
        }
        if (Holds(text, ["ar-cluster"]))
        {
            return ClusterKind.ArCluster;
        }
        if (Holds(text, ["cc cluster", "cc-cluster"]))
        {
            return ClusterKind.CcCluster;
        }
        return Holds(text, ["dxspider", "dx spider"]) ? ClusterKind.DxSpider : ClusterKind.Unknown;
    }

    private static bool Holds(string text, IReadOnlyList<string> phrases)
    {
        foreach (string phrase in phrases)
        {
            if (text.Contains(phrase, StringComparison.OrdinalIgnoreCase))
            {
                return true;
            }
        }
        return false;
    }
}