#include <xaudio2.h>
#include "SDL_xaudio2_winrthelpers.h"

#if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
using Windows::Devices::Enumeration::DeviceClass;
using Windows::Devices::Enumeration::DeviceInformation;
using Windows::Devices::Enumeration::DeviceInformationCollection;
#endif

HRESULT IXAudio2_GetDeviceCount(IXAudio2 * ixa2, UINT32 * devcount)
{
#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
    // There doesn't seem to be any audio device enumeration on Windows Phone.
    // In lieu of this, just treat things as if there is one and only one
    // audio device.
    *devcount = 1;
    return S_OK;
#else
    // TODO, WinRT: make xaudio2 device enumeration only happen once, and in the background
    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
    {
    }
 
    DeviceInformationCollection^ devices = operation->GetResults();
    *devcount = devices->Size;
    return S_OK;
#endif
}

HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details)
{
#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
    // Windows Phone doesn't seem to have the same device enumeration APIs that
    // Windows 8/RT has, or it doesn't have them at all.  In lieu of this,
    // just treat things as if there is one, and only one, default device.
    if (index != 0)
    {
        return XAUDIO2_E_INVALID_CALL;
    }

    if (details)
    {
        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), L"default", _TRUNCATE);
        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), L"default", _TRUNCATE);
    }
    return S_OK;
#else
    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
    {
    }
 
    DeviceInformationCollection^ devices = operation->GetResults();
    if (index >= devices->Size)
    {
        return XAUDIO2_E_INVALID_CALL;
    }

    DeviceInformation^ d = devices->GetAt(index);
    if (details)
    {
        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), d->Id->Data(), _TRUNCATE);
        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), d->Name->Data(), _TRUNCATE);
    }
    return S_OK;
#endif
}