using System.Runtime.InteropServices;
using Foundation;

namespace VoiceCat.iOS;

internal static partial class IosScreenCapture
{
    internal static void Present()
    {
        if (!OperatingSystem.IsIOSVersionAtLeast(27)) return;
        NSUrl? root = NSFileManager.DefaultManager.GetContainerUrl(IosConstants.AppGroup);
        if (root?.Path is null) throw new InvalidOperationException("The VoiceCat App Group is unavailable.");
        string path = Path.Combine(root.Path, "voicecat", "broadcast_audio.ring"); Directory.CreateDirectory(Path.GetDirectoryName(path)!);
        if (!IsAvailable) throw new InvalidOperationException("Screen audio sharing is unavailable on this device."); PresentNative(path);
    }

    internal static bool IsAvailable => OperatingSystem.IsIOSVersionAtLeast(27) && Available() != 0;

    [LibraryImport("__Internal", EntryPoint = "vc_ios_screen_capture_available")]
    private static partial int Available();
    [LibraryImport("__Internal", EntryPoint = "vc_ios_screen_capture_present", StringMarshalling = StringMarshalling.Utf8)]
    private static partial void PresentNative(string ringPath);
    [LibraryImport("__Internal", EntryPoint = "vc_ios_screen_capture_stop")]
    internal static partial void Stop();
}