using System.Net;
using System.Net.NetworkInformation;

namespace MusicBridge.Agent.Network;

internal static class LocalAddresses
{
    public static IPAddress[] Read() => NetworkInterface.GetAllNetworkInterfaces()
        .Where(nic => nic.OperationalStatus == OperationalStatus.Up && nic.SupportsMulticast
            && nic.NetworkInterfaceType != NetworkInterfaceType.Loopback)
        .SelectMany(nic => nic.GetIPProperties().UnicastAddresses)
        .Select(a => a.Address)
        .Where(IsEligible).Distinct().OrderBy(a => a.ToString(), StringComparer.Ordinal).ToArray();

    public static bool IsEligible(IPAddress ip) => ip.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork
        && ConnectionInvitation.IsLocalEndpoint(new Uri($"https://{ip}"));
}