UEPyEngine.cpp

// Copyright 20Tab S.r.l.

#include "UEPyEngine.h"

#include "Kismet/KismetSystemLibrary.h"
#include "Kismet/KismetMathLibrary.h"

#include "Developer/DesktopPlatform/Public/IDesktopPlatform.h"
#include "Developer/DesktopPlatform/Public/DesktopPlatformModule.h"
#if WITH_EDITOR
#include "PackageTools.h"
#include "Editor.h"
#endif

#include "UnrealEngine.h"
#include "Runtime/Engine/Classes/Engine/GameViewportClient.h"

#if ENGINE_MINOR_VERSION >= 18
#include "HAL/PlatformApplicationMisc.h"
#endif

#include "Runtime/Launch/Public/LaunchEngineLoop.h"

#if PLATFORM_MAC
#include "Runtime/Core/Public/Mac/CocoaThread.h"
#endif

#include "Runtime/Slate/Public/Framework/Application/SlateApplication.h"
#include "Runtime/CoreUObject/Public/UObject/UObjectIterator.h"

PyObject *py_unreal_engine_log(PyObject * self, PyObject * args)
{
	PyObject *py_message;
	if (!PyArg_ParseTuple(args, "O:log", &py_message))
	{
		return NULL;
	}

	PyObject *stringified = PyObject_Str(py_message);
	if (!stringified)
		return PyErr_Format(PyExc_Exception, "argument cannot be casted to string");
	const char *message = UEPyUnicode_AsUTF8(stringified);
	UE_LOG(LogPython, Log, TEXT("%s"), UTF8_TO_TCHAR(message));
	Py_DECREF(stringified);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_log_warning(PyObject * self, PyObject * args)
{
	PyObject *py_message;
	if (!PyArg_ParseTuple(args, "O:log_warning", &py_message))
	{
		return NULL;
	}

	PyObject *stringified = PyObject_Str(py_message);
	if (!stringified)
		return PyErr_Format(PyExc_Exception, "argument cannot be casted to string");
	const char *message = UEPyUnicode_AsUTF8(stringified);
	UE_LOG(LogPython, Warning, TEXT("%s"), UTF8_TO_TCHAR(message));
	Py_DECREF(stringified);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_log_error(PyObject * self, PyObject * args)
{
	PyObject *py_message;
	if (!PyArg_ParseTuple(args, "O:log_error", &py_message))
	{
		return NULL;
	}

	PyObject *stringified = PyObject_Str(py_message);
	if (!stringified)
		return PyErr_Format(PyExc_Exception, "argument cannot be casted to string");
	const char *message = UEPyUnicode_AsUTF8(stringified);
	UE_LOG(LogPython, Error, TEXT("%s"), UTF8_TO_TCHAR(message));
	Py_DECREF(stringified);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_add_on_screen_debug_message(PyObject * self, PyObject * args)
{
	int key;
	float time_to_display;
	PyObject *py_message;
	if (!PyArg_ParseTuple(args, "ifO:add_on_screen_debug_message", &key, &time_to_display, &py_message))
	{
		return NULL;
	}

	if (!GEngine)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *stringified = PyObject_Str(py_message);
	if (!stringified)
		return PyErr_Format(PyExc_Exception, "argument cannot be casted to string");
	const char *message = UEPyUnicode_AsUTF8(stringified);

	GEngine->AddOnScreenDebugMessage(key, time_to_display, FColor::Green, FString::Printf(TEXT("%s"), UTF8_TO_TCHAR(message)));

	Py_DECREF(stringified);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_print_string(PyObject * self, PyObject * args)
{

	PyObject *py_message;
	float timeout = 2.0;
	PyObject *py_color = nullptr;
	if (!PyArg_ParseTuple(args, "O|fO:print_string", &py_message, &timeout, &py_color))
	{
		return NULL;
	}

	if (!GEngine)
	{
		Py_RETURN_NONE;
	}

	FColor color = FColor::Cyan;

	if (py_color)
	{
		ue_PyFColor *f_color = py_ue_is_fcolor(py_color);
		if (!f_color)
			return PyErr_Format(PyExc_Exception, "argument is not a FColor");
		color = f_color->color;
	}

	PyObject *stringified = PyObject_Str(py_message);
	if (!stringified)
		return PyErr_Format(PyExc_Exception, "argument cannot be casted to string");
	const char *message = UEPyUnicode_AsUTF8(stringified);

	GEngine->AddOnScreenDebugMessage(-1, timeout, color, FString(UTF8_TO_TCHAR(message)));

	Py_DECREF(stringified);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_get_forward_vector(PyObject * self, PyObject * args)
{
	FRotator rot;
	if (!py_ue_rotator_arg(args, rot))
		return NULL;
	FVector vec = UKismetMathLibrary::GetForwardVector(rot);
	return py_ue_new_fvector(vec);
}

PyObject *py_unreal_engine_get_right_vector(PyObject * self, PyObject * args)
{
	FRotator rot;
	if (!py_ue_rotator_arg(args, rot))
		return NULL;
	FVector vec = UKismetMathLibrary::GetRightVector(rot);
	return py_ue_new_fvector(vec);
}

PyObject *py_unreal_engine_get_up_vector(PyObject * self, PyObject * args)
{
	FRotator rot;
	if (!py_ue_rotator_arg(args, rot))
		return NULL;
	FVector vec = UKismetMathLibrary::GetUpVector(rot);
	return py_ue_new_fvector(vec);
}

PyObject *py_unreal_engine_get_content_dir(PyObject * self, PyObject * args)
{
#if ENGINE_MINOR_VERSION >= 18
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::ProjectContentDir()));
#else
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::GameContentDir()));
#endif
}

PyObject *py_unreal_engine_get_game_saved_dir(PyObject * self, PyObject * args)
{
#if ENGINE_MINOR_VERSION >= 18
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::ProjectSavedDir()));
#else
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::GameSavedDir()));
#endif
}

PyObject * py_unreal_engine_get_game_user_developer_dir(PyObject *, PyObject *)
{
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::GameUserDeveloperDir()));
}

PyObject *py_unreal_engine_convert_relative_path_to_full(PyObject * self, PyObject * args)
{
	char *path;
	if (!PyArg_ParseTuple(args, "s:convert_relative_path_to_full", &path))
	{
		return NULL;
	}
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::ConvertRelativePathToFull(UTF8_TO_TCHAR(path))));
}

PyObject *py_unreal_engine_object_path_to_package_name(PyObject * self, PyObject * args)
{
	char *path;
	if (!PyArg_ParseTuple(args, "s:object_path_to_package_name", &path))
	{
		return NULL;
	}
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPackageName::ObjectPathToPackageName( FString( UTF8_TO_TCHAR(path) ) )));
}

PyObject *py_unreal_engine_get_path(PyObject * self, PyObject * args)
{
	char *path;
	if (!PyArg_ParseTuple(args, "s:get_path", &path))
	{
		return NULL;
	}
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::GetPath(UTF8_TO_TCHAR(path))));
}

PyObject *py_unreal_engine_get_base_filename(PyObject * self, PyObject * args)
{
	char *path;
	if (!PyArg_ParseTuple(args, "s:get_base_filename", &path))
	{
		return NULL;
	}
	return PyUnicode_FromString(TCHAR_TO_UTF8(*FPaths::GetBaseFilename(UTF8_TO_TCHAR(path))));
}

PyObject *py_unreal_engine_create_world(PyObject * self, PyObject * args)
{
	int world_type = 0;
	if (!PyArg_ParseTuple(args, "|i:create_world", &world_type))
	{
		return NULL;
	}

	UWorld *world = UWorld::CreateWorld((EWorldType::Type)world_type, false);

	Py_RETURN_UOBJECT(world);
}

PyObject *py_unreal_engine_find_class(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:find_class", &name))
	{
		return NULL;
	}

	UClass *u_class = FindObject<UClass>(ANY_PACKAGE, UTF8_TO_TCHAR(name));

	if (!u_class)
		return PyErr_Format(PyExc_Exception, "unable to find class %s", name);

	Py_RETURN_UOBJECT(u_class);
}

PyObject *py_unreal_engine_find_enum(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:find_enum", &name))
	{
		return NULL;
	}

	UEnum *u_enum = FindObject<UEnum>(ANY_PACKAGE, UTF8_TO_TCHAR(name));

	if (!u_enum)
		return PyErr_Format(PyExc_Exception, "unable to find enum %s", name);

	Py_RETURN_UOBJECT(u_enum);
}

PyObject *py_unreal_engine_load_package(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:load_package", &name))
	{
		return nullptr;
	}

	UPackage *u_package = LoadPackage(nullptr, UTF8_TO_TCHAR(name), LOAD_None);

	if (!u_package)
		return PyErr_Format(PyExc_Exception, "unable to load package %s", name);

	Py_RETURN_UOBJECT(u_package);
}

#if WITH_EDITOR
PyObject *py_unreal_engine_unload_package(PyObject * self, PyObject * args)
{
	PyObject *obj;
	if (!PyArg_ParseTuple(args, "O:unload_package", &obj))
	{
		return NULL;
	}

	UPackage* packageToUnload = ue_py_check_type<UPackage>(obj);
	if (!packageToUnload)
	{
		return PyErr_Format(PyExc_Exception, "argument is not a UPackage");
	}

	FText outErrorMsg;
#if ENGINE_MINOR_VERSION >= 21
	if (!UPackageTools::UnloadPackages({ packageToUnload }, outErrorMsg))
#else
	if (!PackageTools::UnloadPackages({ packageToUnload }, outErrorMsg))
#endif
	{
		return PyErr_Format(PyExc_Exception, "%s", TCHAR_TO_UTF8(*outErrorMsg.ToString()));
	}

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_get_package_filename(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:get_package_filename", &name))
	{
		return NULL;
	}

	FString Filename;
	if (!FPackageName::DoesPackageExist(FString(UTF8_TO_TCHAR(name)), nullptr, &Filename))
		return PyErr_Format(PyExc_Exception, "package does not exist");

	return PyUnicode_FromString(TCHAR_TO_UTF8(*Filename));
}
#endif

PyObject *py_unreal_engine_load_class(PyObject * self, PyObject * args)
{
	char *name;
	char *filename = nullptr;
	if (!PyArg_ParseTuple(args, "s|s:load_class", &name, &filename))
	{
		return NULL;
	}

	TCHAR *t_filename = (TCHAR *)0;
	if (filename)
		t_filename = UTF8_TO_TCHAR(filename);

	UObject *u_class = StaticLoadObject(UClass::StaticClass(), NULL, UTF8_TO_TCHAR(name), t_filename);

	if (!u_class)
		return PyErr_Format(PyExc_Exception, "unable to find class %s", name);

	Py_RETURN_UOBJECT(u_class);
}

PyObject *py_unreal_engine_load_enum(PyObject * self, PyObject * args)
{
	char *name;
	char *filename = nullptr;
	if (!PyArg_ParseTuple(args, "s|s:load_enum", &name, &filename))
	{
		return NULL;
	}

	TCHAR *t_filename = (TCHAR *)0;
	if (filename)
		t_filename = UTF8_TO_TCHAR(filename);

	UObject *u_enum = StaticLoadObject(UEnum::StaticClass(), NULL, UTF8_TO_TCHAR(name), t_filename);

	if (!u_enum)
		return PyErr_Format(PyExc_Exception, "unable to find enum %s", name);

	Py_RETURN_UOBJECT(u_enum);
}

PyObject *py_unreal_engine_find_struct(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:find_struct", &name))
	{
		return NULL;
	}

	UScriptStruct *u_struct = FindObject<UScriptStruct>(ANY_PACKAGE, UTF8_TO_TCHAR(name));

	if (!u_struct)
		return PyErr_Format(PyExc_Exception, "unable to find struct %s", name);

	Py_RETURN_UOBJECT(u_struct);
}

PyObject *py_unreal_engine_load_struct(PyObject * self, PyObject * args)
{
	char *name;
	char *filename = nullptr;
	if (!PyArg_ParseTuple(args, "s|s:load_struct", &name, &filename))
	{
		return NULL;
	}

	TCHAR *t_filename = (TCHAR *)0;
	if (filename)
		t_filename = UTF8_TO_TCHAR(filename);

	UObject *u_struct = StaticLoadObject(UScriptStruct::StaticClass(), NULL, UTF8_TO_TCHAR(name), t_filename);

	if (!u_struct)
		return PyErr_Format(PyExc_Exception, "unable to find struct %s", name);

	Py_RETURN_UOBJECT(u_struct);
}


PyObject *py_unreal_engine_load_object(PyObject * self, PyObject * args)
{
	PyObject *obj;
	char *name;
	char *filename = nullptr;
	if (!PyArg_ParseTuple(args, "Os|s:load_object", &obj, &name, &filename))
	{
		return NULL;
	}

	if (!ue_is_pyuobject(obj))
	{
		return PyErr_Format(PyExc_Exception, "argument is not a UObject");
	}

	ue_PyUObject *py_obj = (ue_PyUObject *)obj;
	if (!py_obj->ue_object->IsA<UClass>())
	{
		return PyErr_Format(PyExc_Exception, "argument is not a UClass");
	}

	UClass *u_class = (UClass *)py_obj->ue_object;

	TCHAR *t_filename = (TCHAR *)0;
	if (filename)
		t_filename = UTF8_TO_TCHAR(filename);

	UObject *u_object = StaticLoadObject(u_class, NULL, UTF8_TO_TCHAR(name), t_filename);

	if (!u_object)
		return PyErr_Format(PyExc_Exception, "unable to load object %s", name);

	Py_RETURN_UOBJECT(u_object);

}

PyObject *py_unreal_engine_string_to_guid(PyObject * self, PyObject * args)
{
	char *str;
	if (!PyArg_ParseTuple(args, "s:string_to_guid", &str))
	{
		return nullptr;
	}

	FGuid guid;

	if (FGuid::Parse(FString(str), guid))
	{
		return py_ue_new_owned_uscriptstruct(FindObject<UScriptStruct>(ANY_PACKAGE, UTF8_TO_TCHAR((char *)"Guid")), (uint8 *)&guid);
	}

	return PyErr_Format(PyExc_Exception, "unable to build FGuid");
}

PyObject *py_unreal_engine_new_guid(PyObject * self, PyObject * args)
{

	FGuid guid = FGuid::NewGuid();

	return py_ue_new_owned_uscriptstruct(FindObject<UScriptStruct>(ANY_PACKAGE, UTF8_TO_TCHAR((char *)"Guid")), (uint8 *)&guid);
}

PyObject *py_unreal_engine_guid_to_string(PyObject * self, PyObject * args)
{
	PyObject *py_guid;
	if (!PyArg_ParseTuple(args, "O:guid_to_string", &py_guid))
	{
		return nullptr;
	}

	FGuid *guid = ue_py_check_fguid(py_guid);
	if (!guid)
		return PyErr_Format(PyExc_Exception, "object is not a FGuid");

	return PyUnicode_FromString(TCHAR_TO_UTF8(*guid->ToString()));
}

PyObject *py_unreal_engine_slate_tick(PyObject * self, PyObject * args)
{
	Py_BEGIN_ALLOW_THREADS;
	FSlateApplication::Get().PumpMessages();
	FSlateApplication::Get().Tick();
	Py_END_ALLOW_THREADS;
	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_engine_tick(PyObject * self, PyObject * args)
{
	float delta_seconds = FApp::GetDeltaTime();
	PyObject *py_idle = nullptr;
	if (!PyArg_ParseTuple(args, "|fO:engine_tick", &delta_seconds, &py_idle))
	{
		return nullptr;
	}

	bool bIdle = false;
	if (py_idle && PyObject_IsTrue(py_idle))
		bIdle = true;

	Py_BEGIN_ALLOW_THREADS;
	GEngine->Tick(delta_seconds, bIdle);
	Py_END_ALLOW_THREADS;

	Py_RETURN_NONE;
}

#if WITH_EDITOR
PyObject *py_unreal_engine_tick_rendering_tickables(PyObject * self, PyObject * args)
{
	Py_BEGIN_ALLOW_THREADS;
	TickRenderingTickables();
	Py_END_ALLOW_THREADS;

	Py_RETURN_NONE;
}
#endif

PyObject *py_unreal_engine_get_delta_time(PyObject * self, PyObject * args)
{
	return PyFloat_FromDouble(FApp::GetDeltaTime());
}


PyObject *py_unreal_engine_find_object(PyObject * self, PyObject * args)
{
	char *name;
	if (!PyArg_ParseTuple(args, "s:find_object", &name))
	{
		return NULL;
	}

	UObject *u_object = FindObject<UObject>(ANY_PACKAGE, UTF8_TO_TCHAR(name));

	if (!u_object)
		return PyErr_Format(PyExc_Exception, "unable to find object %s", name);

	Py_RETURN_UOBJECT(u_object);
}


PyObject *py_unreal_engine_new_object(PyObject * self, PyObject * args)
{

	PyObject *obj;
	PyObject *py_outer = NULL;
	char *name = nullptr;
	uint64 flags = (uint64)(RF_Public);
	if (!PyArg_ParseTuple(args, "O|OsK:new_object", &obj, &py_outer, &name, &flags))
	{
		return nullptr;
	}

	UClass *obj_class = ue_py_check_type<UClass>(obj);
	if (!obj_class)
		return PyErr_Format(PyExc_Exception, "uobject is not a UClass");

	FName f_name = NAME_None;

	if (name && strlen(name) > 0)
	{
		f_name = FName(UTF8_TO_TCHAR(name));
	}

	UObject *outer = GetTransientPackage();

	if (py_outer && py_outer != Py_None)
	{
		outer = ue_py_check_type<UObject>(py_outer);
		if (!outer)
			return PyErr_Format(PyExc_Exception, "argument is not a UObject");
		EXTRA_UE_LOG(LogPython, Warning, TEXT("object creation outer is %s"), *outer->GetName());
	}


	UObject *new_object = nullptr;
	Py_BEGIN_ALLOW_THREADS;
	new_object = NewObject<UObject>(outer, obj_class, f_name, (EObjectFlags)flags);
	if (new_object)
		new_object->PostLoad();
	Py_END_ALLOW_THREADS;

	if (!new_object)
		return PyErr_Format(PyExc_Exception, "unable to create object");

	Py_RETURN_UOBJECT(new_object);
}

PyObject *py_unreal_engine_get_mutable_default(PyObject * self, PyObject * args)
{

	PyObject *obj;
	if (!PyArg_ParseTuple(args, "O|Os:get_mutable_default", &obj))
	{
		return NULL;
	}

	if (!ue_is_pyuobject(obj))
	{
		return PyErr_Format(PyExc_Exception, "argument is not a UObject");
	}

	ue_PyUObject *py_obj = (ue_PyUObject *)obj;

	if (!py_obj->ue_object->IsA<UClass>())
		return PyErr_Format(PyExc_Exception, "uobject is not a UClass");

	UClass *obj_class = (UClass *)py_obj->ue_object;

	UObject *mutable_object = GetMutableDefault<UObject>(obj_class);
	if (!mutable_object)
		return PyErr_Format(PyExc_Exception, "unable to create object");

	Py_RETURN_UOBJECT(mutable_object);
}


PyObject *py_unreal_engine_new_class(PyObject * self, PyObject * args)
{

	PyObject *py_parent;
	char *name;
	if (!PyArg_ParseTuple(args, "Os:new_class", &py_parent, &name))
	{
		return NULL;
	}

	UClass *parent = nullptr;

	if (py_parent != Py_None)
	{
		if (!ue_is_pyuobject(py_parent))
		{
			return PyErr_Format(PyExc_Exception, "argument is not a UObject");
		}
		ue_PyUObject *py_obj = (ue_PyUObject *)py_parent;
		if (!py_obj->ue_object->IsA<UClass>())
			return PyErr_Format(PyExc_Exception, "uobject is not a UClass");
		parent = (UClass *)py_obj->ue_object;
	}

	UClass *new_object = unreal_engine_new_uclass(name, parent);
	if (!new_object)
		return PyErr_Format(PyExc_Exception, "unable to create UClass");

	Py_RETURN_UOBJECT(new_object);
}

PyObject *py_unreal_engine_all_classes(PyObject * self, PyObject * args)
{

	PyObject *ret = PyList_New(0);

	for (TObjectIterator<UClass> Itr; Itr; ++Itr)
	{
		ue_PyUObject *py_obj = ue_get_python_uobject(*Itr);
		if (!py_obj)
			continue;
		PyList_Append(ret, (PyObject *)py_obj);
	}
	return ret;
}

PyObject *py_unreal_engine_all_worlds(PyObject * self, PyObject * args)
{
	PyObject *ret = PyList_New(0);
	for (TObjectIterator<UWorld> Itr; Itr; ++Itr)
	{
		ue_PyUObject *py_obj = ue_get_python_uobject(*Itr);
		if (!py_obj)
			continue;
		PyList_Append(ret, (PyObject *)py_obj);
	}
	return ret;
}

PyObject *py_unreal_engine_tobject_iterator(PyObject * self, PyObject * args)
{
	PyObject *py_class;
	if (!PyArg_ParseTuple(args, "O:tobject_iterator", &py_class))
	{
		return NULL;
	}

	UClass *u_class = ue_py_check_type<UClass>(py_class);
	if (!u_class)
	{
		return PyErr_Format(PyExc_TypeError, "argument is not a UClass");
	}

	PyObject *ret = PyList_New(0);
	for (TObjectIterator<UObject> Itr; Itr; ++Itr)
	{

		if (!(*Itr)->IsA(u_class))
			continue;

		ue_PyUObject *py_obj = ue_get_python_uobject(*Itr);
		if (!py_obj)
			continue;
		PyList_Append(ret, (PyObject *)py_obj);
	}
	return ret;
}

PyObject *py_unreal_engine_create_and_dispatch_when_ready(PyObject * self, PyObject * args)
{
	PyObject *py_callable;
	int named_thread = (int)ENamedThreads::GameThread;
	if (!PyArg_ParseTuple(args, "O|i:create_and_dispatch_when_ready", &py_callable, &named_thread))
	{
		return NULL;
	}

	if (!PyCallable_Check(py_callable))
		return PyErr_Format(PyExc_TypeError, "argument is not callable");

	Py_INCREF(py_callable);


	FGraphEventRef task = FFunctionGraphTask::CreateAndDispatchWhenReady([&]() {
		FScopePythonGIL gil;
		PyObject *ret = PyObject_CallObject(py_callable, nullptr);
		if (ret)
		{
			Py_DECREF(ret);
		}
		else
		{
			unreal_engine_py_log_error();
		}
		Py_DECREF(py_callable);
	}, TStatId(), nullptr, (ENamedThreads::Type)named_thread);


	Py_BEGIN_ALLOW_THREADS;
	FTaskGraphInterface::Get().WaitUntilTaskCompletes(task);
	Py_END_ALLOW_THREADS;
	// TODO Implement signal triggering in addition to WaitUntilTaskCompletes
	// FTaskGraphInterface::Get().TriggerEventWhenTaskCompletes

	Py_RETURN_NONE;
}


#if PLATFORM_MAC
PyObject *py_unreal_engine_main_thread_call(PyObject * self, PyObject * args)
{
	PyObject *py_callable;
	if (!PyArg_ParseTuple(args, "O|:main_thread_call", &py_callable))
	{
		return NULL;
	}

	if (!PyCallable_Check(py_callable))
		return PyErr_Format(PyExc_TypeError, "argument is not callable");

	Py_INCREF(py_callable);

	Py_BEGIN_ALLOW_THREADS;
	MainThreadCall(^{
		FScopePythonGIL gil;
		PyObject *ret = PyObject_CallObject(py_callable, nullptr);
		if (ret)
		{
			Py_DECREF(ret);
		}
		else
		{
			unreal_engine_py_log_error();
		}
		Py_DECREF(py_callable);
		});
	Py_END_ALLOW_THREADS;

	Py_RETURN_NONE;
}
#endif




PyObject *py_unreal_engine_get_game_viewport_size(PyObject *self, PyObject * args)
{

	if (!GEngine->GameViewport)
	{
		return PyErr_Format(PyExc_Exception, "unable to get GameViewport");
	}

	FVector2D size;
	GEngine->GameViewport->GetViewportSize(size);

	return Py_BuildValue("(ff)", size.X, size.Y);
}


PyObject *py_unreal_engine_get_resolution(PyObject *self, PyObject * args)
{
	return Py_BuildValue("(ff)", GSystemResolution.ResX, GSystemResolution.ResY);
}

PyObject *py_unreal_engine_get_viewport_screenshot(PyObject *self, PyObject * args)
{

	if (!GEngine->GameViewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *py_bool = nullptr;
	bool as_int_list = false;
	if (!PyArg_ParseTuple(args, "|O:get_viewport_screenshot", &py_bool))
	{
		return NULL;
	}

	if (py_bool && PyObject_IsTrue(py_bool))
		as_int_list = true;

	FViewport *viewport = GEngine->GameViewport->Viewport;
	TArray<FColor> bitmap;

	bool success = GetViewportScreenShot(viewport, bitmap);

	if (!success)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	if (as_int_list)
	{
		PyObject *bitmap_tuple = PyTuple_New(bitmap.Num() * 4);
		for (int i = 0; i < bitmap.Num(); i++)
		{
			PyTuple_SetItem(bitmap_tuple, i * 4, PyLong_FromLong(bitmap[i].R));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 1, PyLong_FromLong(bitmap[i].G));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 2, PyLong_FromLong(bitmap[i].B));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 3, PyLong_FromLong(bitmap[i].A));
		}
		return bitmap_tuple;
	}

	PyObject *bitmap_tuple = PyTuple_New(bitmap.Num());
	for (int i = 0; i < bitmap.Num(); i++)
	{
		PyTuple_SetItem(bitmap_tuple, i, py_ue_new_fcolor(bitmap[i]));
	}

	return bitmap_tuple;
}

PyObject *py_unreal_engine_get_viewport_size(PyObject *self, PyObject * args)
{

	if (!GEngine->GameViewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	FViewport *viewport = GEngine->GameViewport->Viewport;
	PyObject *tuple_size = PyTuple_New(2);
	FIntPoint point = viewport->GetSizeXY();

	PyTuple_SetItem(tuple_size, 0, PyLong_FromLong(point.X));
	PyTuple_SetItem(tuple_size, 1, PyLong_FromLong(point.Y));

	return tuple_size;
}

#if WITH_EDITOR
PyObject *py_unreal_engine_editor_get_active_viewport_screenshot(PyObject *self, PyObject * args)
{

	FViewport *viewport = GEditor->GetActiveViewport();
	if (!viewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *py_bool = nullptr;
	bool as_int_list = false;
	if (!PyArg_ParseTuple(args, "|O:editor_get_active_viewport_screenshot", &py_bool))
	{
		return NULL;
	}

	if (py_bool && PyObject_IsTrue(py_bool))
		as_int_list = true;

	TArray<FColor> bitmap;

	bool success = GetViewportScreenShot(viewport, bitmap);

	if (!success)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	if (as_int_list)
	{
		PyObject *bitmap_tuple = PyTuple_New(bitmap.Num() * 4);
		for (int i = 0; i < bitmap.Num(); i++)
		{
			PyTuple_SetItem(bitmap_tuple, i * 4, PyLong_FromLong(bitmap[i].R));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 1, PyLong_FromLong(bitmap[i].G));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 2, PyLong_FromLong(bitmap[i].B));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 3, PyLong_FromLong(bitmap[i].A));
		}
		return bitmap_tuple;
	}

	PyObject *bitmap_tuple = PyTuple_New(bitmap.Num());
	for (int i = 0; i < bitmap.Num(); i++)
	{
		PyTuple_SetItem(bitmap_tuple, i, py_ue_new_fcolor(bitmap[i]));
	}

	return bitmap_tuple;
}

PyObject *py_unreal_engine_editor_get_active_viewport_size(PyObject *self, PyObject * args)
{


	FViewport *viewport = GEditor->GetActiveViewport();
	if (!viewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *tuple_size = PyTuple_New(2);

	FIntPoint point = viewport->GetSizeXY();

	PyTuple_SetItem(tuple_size, 0, PyLong_FromLong(point.X));
	PyTuple_SetItem(tuple_size, 1, PyLong_FromLong(point.Y));

	return tuple_size;
}

PyObject *py_unreal_engine_editor_get_pie_viewport_screenshot(PyObject *self, PyObject * args)
{

	FViewport *viewport = GEditor->GetPIEViewport();
	if (!viewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *py_bool = nullptr;
	bool as_int_list = false;
	if (!PyArg_ParseTuple(args, "|O:editor_get_pie_viewport_screenshot", &py_bool))
	{
		return NULL;
	}

	if (py_bool && PyObject_IsTrue(py_bool))
		as_int_list = true;

	TArray<FColor> bitmap;

	bool success = GetViewportScreenShot(viewport, bitmap);

	if (!success)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	if (as_int_list)
	{
		PyObject *bitmap_tuple = PyTuple_New(bitmap.Num() * 4);
		for (int i = 0; i < bitmap.Num(); i++)
		{
			PyTuple_SetItem(bitmap_tuple, i * 4, PyLong_FromLong(bitmap[i].R));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 1, PyLong_FromLong(bitmap[i].G));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 2, PyLong_FromLong(bitmap[i].B));
			PyTuple_SetItem(bitmap_tuple, i * 4 + 3, PyLong_FromLong(bitmap[i].A));
		}
		return bitmap_tuple;
	}

	PyObject *bitmap_tuple = PyTuple_New(bitmap.Num());
	for (int i = 0; i < bitmap.Num(); i++)
	{
		PyTuple_SetItem(bitmap_tuple, i, py_ue_new_fcolor(bitmap[i]));
	}

	return bitmap_tuple;
}

PyObject *py_unreal_engine_editor_get_pie_viewport_size(PyObject *self, PyObject * args)
{


	FViewport *viewport = GEditor->GetPIEViewport();
	if (!viewport)
	{
		Py_INCREF(Py_None);
		return Py_None;
	}

	PyObject *tuple_size = PyTuple_New(2);
	FIntPoint point = viewport->GetSizeXY();

	PyTuple_SetItem(tuple_size, 0, PyLong_FromLong(point.X));
	PyTuple_SetItem(tuple_size, 1, PyLong_FromLong(point.Y));
	return tuple_size;
}
#endif

PyObject *py_unreal_engine_create_package(PyObject *self, PyObject * args)
{

	char *name;

	if (!PyArg_ParseTuple(args, "s:create_package", &name))
	{
		return nullptr;
	}

	UPackage *u_package = (UPackage *)StaticFindObject(nullptr, ANY_PACKAGE, UTF8_TO_TCHAR(name), true);
	// create a new package if it does not exist
	if (u_package)
	{
		return PyErr_Format(PyExc_Exception, "package %s already exists", TCHAR_TO_UTF8(*u_package->GetPathName()));
	}
#if ENGINE_MINOR_VERSION == 27 || ENGINE_MINOR_VERSION == 26
	u_package = CreatePackage(UTF8_TO_TCHAR(name));
#else
	u_package = CreatePackage(nullptr, UTF8_TO_TCHAR(name));
#endif
	if (!u_package)
		return PyErr_Format(PyExc_Exception, "unable to create package");
	u_package->FileName = *FPackageName::LongPackageNameToFilename(UTF8_TO_TCHAR(name), FPackageName::GetAssetPackageExtension());

	u_package->FullyLoad();
	u_package->MarkPackageDirty();

	Py_RETURN_UOBJECT(u_package);
}

PyObject *py_unreal_engine_get_or_create_package(PyObject *self, PyObject * args)
{

	char *name;

	if (!PyArg_ParseTuple(args, "s:get_or_create_package", &name))
	{
		return nullptr;
	}

	UPackage *u_package = (UPackage *)StaticFindObject(nullptr, ANY_PACKAGE, UTF8_TO_TCHAR(name), true);
	// create a new package if it does not exist
	if (!u_package)
	{
#if ENGINE_MINOR_VERSION == 27 || ENGINE_MINOR_VERSION == 26
		u_package = CreatePackage(UTF8_TO_TCHAR(name));
#else
		u_package = CreatePackage(nullptr, UTF8_TO_TCHAR(name));
#endif
		if (!u_package)
			return PyErr_Format(PyExc_Exception, "unable to create package");
		u_package->FileName = *FPackageName::LongPackageNameToFilename(UTF8_TO_TCHAR(name), FPackageName::GetAssetPackageExtension());

		u_package->FullyLoad();
		u_package->MarkPackageDirty();
	}

	Py_RETURN_UOBJECT(u_package);
}

PyObject *py_unreal_engine_get_transient_package(PyObject *self, PyObject * args)
{
	Py_RETURN_UOBJECT(GetTransientPackage());
}

PyObject *py_unreal_engine_open_file_dialog(PyObject *self, PyObject * args)
{
	char *title;
	char *default_path = (char *)"";
	char *default_file = (char *)"";
	char *file_types = (char *)"";
	PyObject *py_multiple = nullptr;

	if (!PyArg_ParseTuple(args, "s|sssO:open_file_dialog", &title, &default_path, &default_file, &file_types, &py_multiple))
		return nullptr;

	IDesktopPlatform *DesktopPlatform = FDesktopPlatformModule::Get();
	if (!DesktopPlatform)
		return PyErr_Format(PyExc_Exception, "unable to get reference to DesktopPlatform module");

	TSharedPtr<SWindow> ParentWindow = FGlobalTabmanager::Get()->GetRootWindow();
	if (!ParentWindow.IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get the Root Window");

	if (!ParentWindow->GetNativeWindow().IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get Native Root Window");

	TArray<FString> files;

	if (!DesktopPlatform->OpenFileDialog(ParentWindow->GetNativeWindow()->GetOSWindowHandle(), FString(UTF8_TO_TCHAR(title)),
		FString(UTF8_TO_TCHAR(default_path)),
		FString(UTF8_TO_TCHAR(default_file)),
		FString(UTF8_TO_TCHAR(file_types)),
		(py_multiple && PyObject_IsTrue(py_multiple)) ? EFileDialogFlags::Multiple : EFileDialogFlags::None,
		files))
	{
		Py_RETURN_NONE;
	}

	PyObject *py_list = PyList_New(0);
	for (FString file : files)
	{
		PyList_Append(py_list, PyUnicode_FromString(TCHAR_TO_UTF8(*file)));
	}
	return py_list;
}

PyObject *py_unreal_engine_open_directory_dialog(PyObject *self, PyObject * args)
{
	char *title;
	char *default_path = (char *)"";

	if (!PyArg_ParseTuple(args, "s|s:open_directory_dialog", &title, &default_path))
		return nullptr;

	IDesktopPlatform *DesktopPlatform = FDesktopPlatformModule::Get();
	if (!DesktopPlatform)
		return PyErr_Format(PyExc_Exception, "unable to get reference to DesktopPlatform module");

	TSharedPtr<SWindow> ParentWindow = FGlobalTabmanager::Get()->GetRootWindow();
	if (!ParentWindow.IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get the Root Window");

	if (!ParentWindow->GetNativeWindow().IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get Native Root Window");

	FString choosen_dir;

	if (!DesktopPlatform->OpenDirectoryDialog(ParentWindow->GetNativeWindow()->GetOSWindowHandle(), FString(UTF8_TO_TCHAR(title)),
		FString(UTF8_TO_TCHAR(default_path)),
		choosen_dir))
	{
		Py_RETURN_NONE;
	}

	return PyUnicode_FromString(TCHAR_TO_UTF8(*choosen_dir));
}

PyObject *py_unreal_engine_open_font_dialog(PyObject *self, PyObject * args)
{

	IDesktopPlatform *DesktopPlatform = FDesktopPlatformModule::Get();
	if (!DesktopPlatform)
		return PyErr_Format(PyExc_Exception, "unable to get reference to DesktopPlatform module");

	TSharedPtr<SWindow> ParentWindow = FGlobalTabmanager::Get()->GetRootWindow();
	if (!ParentWindow.IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get the Root Window");

	if (!ParentWindow->GetNativeWindow().IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get Native Root Window");

	FString font_name;
	float height;
	EFontImportFlags flags;

	if (!DesktopPlatform->OpenFontDialog(ParentWindow->GetNativeWindow()->GetOSWindowHandle(), font_name, height, flags))
	{
		Py_RETURN_NONE;
	}

	return Py_BuildValue((char*)"(sfi)", TCHAR_TO_UTF8(*font_name), height, flags);
}

PyObject *py_unreal_engine_save_file_dialog(PyObject *self, PyObject * args)
{
	char *title;
	char *default_path = (char *)"";
	char *default_file = (char *)"";
	char *file_types = (char *)"";
	PyObject *py_multiple = nullptr;

	if (!PyArg_ParseTuple(args, "s|sssO:save_file_dialog", &title, &default_path, &default_file, &file_types, &py_multiple))
		return nullptr;

	IDesktopPlatform *DesktopPlatform = FDesktopPlatformModule::Get();
	if (!DesktopPlatform)
		return PyErr_Format(PyExc_Exception, "unable to get reference to DesktopPlatform module");

	TSharedPtr<SWindow> ParentWindow = FGlobalTabmanager::Get()->GetRootWindow();
	if (!ParentWindow.IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get the Root Window");

	if (!ParentWindow->GetNativeWindow().IsValid())
		return PyErr_Format(PyExc_Exception, "unable to get Native Root Window");

	TArray<FString> files;

	if (!DesktopPlatform->SaveFileDialog(ParentWindow->GetNativeWindow()->GetOSWindowHandle(), FString(UTF8_TO_TCHAR(title)),
		FString(UTF8_TO_TCHAR(default_path)),
		FString(UTF8_TO_TCHAR(default_file)),
		FString(UTF8_TO_TCHAR(file_types)),
		(py_multiple && PyObject_IsTrue(py_multiple)) ? EFileDialogFlags::Multiple : EFileDialogFlags::None,
		files))
	{
		Py_RETURN_NONE;
	}

	PyObject *py_list = PyList_New(0);
	for (FString file : files)
	{
		PyList_Append(py_list, PyUnicode_FromString(TCHAR_TO_UTF8(*file)));
	}
	return py_list;
}

PyObject *py_unreal_engine_copy_properties_for_unrelated_objects(PyObject * self, PyObject * args, PyObject *kwargs)
{

	PyObject *old_py_object;
	PyObject *new_py_object;

	PyObject *py_aggressive_default_subobject_replacement = nullptr;
	PyObject *py_copy_deprecated_properties = nullptr;
	PyObject *py_do_delta = nullptr;
	PyObject *py_notify_object_replacement = nullptr;
	PyObject *py_preserve_root_component = nullptr;
	PyObject *py_replace_object_class_references = nullptr;
	PyObject *py_skip_compiler_generated_defaults = nullptr;

	static char *kw_names[] = {
		(char *)"old_object",
		(char *)"new_object",
		(char *)"aggressive_default_subobject_replacement",
		(char *)"copy_deprecated_properties",
		(char *)"do_delta",
		(char *)"notify_object_replacement",
		(char *)"preserve_root_component",
		(char *)"replace_object_class_references",
		(char *)"skip_compiler_generated_defaults",
		nullptr
	};

	if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO|OOOOOOO:copy_properties_for_unrelated_objects", kw_names,
		&old_py_object,
		&new_py_object,
		&py_aggressive_default_subobject_replacement,
		&py_copy_deprecated_properties,
		&py_do_delta,
		&py_notify_object_replacement,
		&py_preserve_root_component,
		&py_replace_object_class_references,
		&py_skip_compiler_generated_defaults))
	{
		return nullptr;
	}

	UObject *old_object = ue_py_check_type<UObject>(old_py_object);
	if (!old_object)
		return PyErr_Format(PyExc_Exception, "argument is not a UObject");

	UObject *new_object = ue_py_check_type<UObject>(new_py_object);
	if (!new_object)
		return PyErr_Format(PyExc_Exception, "argument is not a UObject");

	UEngine::FCopyPropertiesForUnrelatedObjectsParams params;
	params.bAggressiveDefaultSubobjectReplacement = (py_aggressive_default_subobject_replacement && PyObject_IsTrue(py_aggressive_default_subobject_replacement));
	params.bCopyDeprecatedProperties = (py_copy_deprecated_properties && PyObject_IsTrue(py_copy_deprecated_properties));
	params.bDoDelta = (py_do_delta && PyObject_IsTrue(py_do_delta));
	params.bNotifyObjectReplacement = (py_notify_object_replacement && PyObject_IsTrue(py_notify_object_replacement));
	params.bPreserveRootComponent = (py_preserve_root_component && PyObject_IsTrue(py_preserve_root_component));
	params.bReplaceObjectClassReferences = (py_replace_object_class_references && PyObject_IsTrue(py_replace_object_class_references));
	params.bSkipCompilerGeneratedDefaults = (py_skip_compiler_generated_defaults && PyObject_IsTrue(py_skip_compiler_generated_defaults));

	GEngine->CopyPropertiesForUnrelatedObjects(
		old_object,
		new_object,
		params);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_set_random_seed(PyObject * self, PyObject * args)
{
	int seed;
	if (!PyArg_ParseTuple(args, "i:set_random_seed", &seed))
	{
		return nullptr;
	}

	// Thanks to Sven Mika (Ducandu GmbH) for spotting this
	FMath::RandInit(seed);
	FGenericPlatformMath::SRandInit(seed);
	FGenericPlatformMath::RandInit(seed);

	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_clipboard_copy(PyObject * self, PyObject * args)
{
	char *text;
	if (!PyArg_ParseTuple(args, "s:clipboard_copy", &text))
	{
		return nullptr;
	}

#if ENGINE_MINOR_VERSION >= 18
	FPlatformApplicationMisc::ClipboardCopy(UTF8_TO_TCHAR(text));
#else
	FGenericPlatformMisc::ClipboardCopy(UTF8_TO_TCHAR(text));
#endif
	Py_RETURN_NONE;
}

PyObject *py_unreal_engine_clipboard_paste(PyObject * self, PyObject * args)
{
	FString clipboard;
#if ENGINE_MINOR_VERSION >= 18
	FPlatformApplicationMisc::ClipboardPaste(clipboard);
#else
	FGenericPlatformMisc::ClipboardPaste(clipboard);
#endif
	return PyUnicode_FromString(TCHAR_TO_UTF8(*clipboard));
}