#include <openvr_driver.h>
#include <cstring>

#include "device_provider.h"
#include "driverlog.h"

#if defined( _WIN32 )
#define HMD_DLL_EXPORT extern "C" __declspec( dllexport )
#define HMD_DLL_IMPORT extern "C" __declspec( dllimport )
#elif defined( __GNUC__ ) || defined( COMPILER_GCC ) || defined( __APPLE__ )
#define HMD_DLL_EXPORT extern "C" __attribute__( ( visibility( "default" ) ) )
#define HMD_DLL_IMPORT extern "C"
#else
#error "Unsupported Platform."
#endif

// Global singleton
static DeviceProvider g_deviceProvider;

//-----------------------------------------------------------------------------
// Purpose: Entry point called by vrserver to get driver interface implementations.
//-----------------------------------------------------------------------------
HMD_DLL_EXPORT void* HmdDriverFactory( const char* pInterfaceName, int* pReturnCode )
{
    if ( 0 == strcmp( vr::IServerTrackedDeviceProvider_Version, pInterfaceName ) )
    {
        return &g_deviceProvider;
    }

    if ( pReturnCode )
        *pReturnCode = vr::VRInitError_Init_InterfaceNotFound;

    return nullptr;
}