using IpPbx.CLMgrLib;

namespace SwyxTray.Swyx;

/// <summary>
/// Einordnung der <see cref="CLMgrLineStates"/> aus der CLMgr-TypeLib.
/// Die Werte stammen direkt aus dem Wrapper (Interop.CLMgr), sind also nicht
/// geraten. Die vielen <c>LSWaitingFor*</c>-Werte sind Uebergangszustaende der
/// CLMgr-Zustandsmaschine und werden hier bewusst als "belegt" behandelt.
/// </summary>
internal static class LineStateExtensions
{
    /// <summary>Eingehender Ruf, der noch nicht angenommen wurde.</summary>
    public static bool IsRinging(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSRinging => true,
        CLMgrLineStates.LSKnocking => true,     // zweiter Ruf waehrend eines Gespraechs
        CLMgrLineStates.LSActiveAlerting => true,
        CLMgrLineStates.LSActiveAlertingDC => true,
        _ => false
    };

    /// <summary>Bestehende Sprechverbindung.</summary>
    public static bool IsActive(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSActive => true,
        CLMgrLineStates.LSConferenceActive => true,
        CLMgrLineStates.LSDirectCall => true,
        CLMgrLineStates.LSTransferring => true,
        _ => false
    };

    /// <summary>Ausgehender Ruf im Aufbau.</summary>
    public static bool IsDialing(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSDialing => true,
        CLMgrLineStates.LSAlerting => true,
        CLMgrLineStates.LSHookOffInternal => true,
        CLMgrLineStates.LSHookOffExternal => true,
        CLMgrLineStates.LSBusy => true,
        _ => false
    };

    public static bool IsOnHold(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSOnHold => true,
        CLMgrLineStates.LSConferenceOnHold => true,
        _ => false
    };

    /// <summary>Leitung frei — wird in der Uebersicht ausgeblendet.</summary>
    public static bool IsIdle(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSInactive => true,
        CLMgrLineStates.LSTerminated => true,
        CLMgrLineStates.LSDisabled => true,
        CLMgrLineStates.LSNone => true,
        _ => false
    };

    /// <summary>Deutscher Klartext fuer Kontextmenue und Sprechblasen.</summary>
    public static string ToDisplayText(this CLMgrLineStates state) => state switch
    {
        CLMgrLineStates.LSInactive => "frei",
        CLMgrLineStates.LSHookOffInternal => "abgehoben (intern)",
        CLMgrLineStates.LSHookOffExternal => "abgehoben (extern)",
        CLMgrLineStates.LSRinging => "klingelt",
        CLMgrLineStates.LSDialing => "waehlt",
        CLMgrLineStates.LSAlerting => "ruft an",
        CLMgrLineStates.LSKnocking => "klopft an",
        CLMgrLineStates.LSBusy => "besetzt",
        CLMgrLineStates.LSActive => "aktiv",
        CLMgrLineStates.LSOnHold => "gehalten",
        CLMgrLineStates.LSConferenceActive => "Konferenz aktiv",
        CLMgrLineStates.LSConferenceOnHold => "Konferenz gehalten",
        CLMgrLineStates.LSTerminated => "beendet",
        CLMgrLineStates.LSTransferring => "wird verbunden",
        CLMgrLineStates.LSDisabled => "deaktiviert",
        CLMgrLineStates.LSDirectCall => "Direktansprache",
        CLMgrLineStates.LSActiveAlerting => "zweiter Ruf",
        CLMgrLineStates.LSActiveAlertingDC => "zweiter Ruf (Direktansprache)",
        CLMgrLineStates.LSNone => "unbekannt",
        _ => state.ToString().StartsWith("LSWaitingFor", StringComparison.Ordinal)
            ? "wird geschaltet"
            : state.ToString()
    };
}