using System;

using OpenTK;
using OpenTK.Audio;

namespace Audio_info
{

    class Program
    {

        static void checkForErrors()
        {
            {
                IntPtr device = Alc.GetContextsDevice(Alc.GetCurrentContext());
                AlcError error = Alc.GetError(device);

                if (error != AlcError.NoError)
                    throw new Exception("ALC Error: (" + error + ")  " + Alc.GetString(device, (AlcGetString)error));
            }
            {
                ALError error = AL.GetError();
                if (error != ALError.NoError)
                    throw new Exception("AL Error: (" + error + ") " + AL.GetErrorString(error));
            }
        }

        static void printDevices(AlcGetStringList which, string kind)
        {
            System.Collections.Generic.IList<string> strings = Alc.GetString(IntPtr.Zero, which);
            checkForErrors();

            Console.WriteLine("Available " + kind + " devices:");
            foreach (string s in strings)
                Console.WriteLine(s);
        }

        static void printALCInfo()
        {
            int major, minor;
            IntPtr device;

            if (Alc.IsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATION_EXT"))
            {
                if (Alc.IsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATE_ALL_EXT"))
                    printDevices(AlcGetStringList.AllDevicesSpecifier, "playback ");
                else
                    printDevices(AlcGetStringList.DeviceSpecifier, "playback ");
                printDevices(AlcGetStringList.CaptureDeviceSpecifier, "capture ");
            }
            else
                Console.WriteLine("No device enumeration available.");

            device = Alc.GetContextsDevice(Alc.GetCurrentContext());
            checkForErrors();

            Console.WriteLine("Default device: \n"+
                   Alc.GetString(device, AlcGetString.DefaultDeviceSpecifier));

            Console.WriteLine("Default capture device: \n"+
                   Alc.GetString(device, AlcGetString.CaptureDefaultDeviceSpecifier));

            Alc.GetInteger(device, AlcGetInteger.MajorVersion, 1, out major);
            Alc.GetInteger(device, AlcGetInteger.MinorVersion, 1, out minor);
            checkForErrors();
            Console.WriteLine("ALC version: " + major + "." + minor);

            Console.WriteLine("ALC extensions: for device ("+device +")\n"+ Alc.GetString(device, AlcGetString.Extensions));
            checkForErrors();
            Console.WriteLine("ALC extensions: for device (null)\n" + Alc.GetString(IntPtr.Zero, AlcGetString.Extensions));
            checkForErrors();
        }

        [STAThread]
        static void Main(string[] args)
        {
            // Extra check added, maybe AudioContext's static methods screw something up?
            checkForErrors();

            IntPtr device = Alc.OpenDevice(null);
            ContextHandle context = Alc.CreateContext(device, (int[])null);
            bool success1 = Alc.MakeContextCurrent(context);
            checkForErrors();

            printALCInfo();
            // printALInfo();
            //   printEFXInfo();
            checkForErrors();

            bool success2 = Alc.MakeContextCurrent(ContextHandle.Zero);
            Alc.DestroyContext(context);
            bool success3 = Alc.CloseDevice(device);

            Console.WriteLine("All done. Press Enter to exit.");
            Console.ReadLine();
        }
    }

}