#include "CoreMinimal.h"
#include "engineutil.hpp"

namespace engineutil {

void init_wrapper(EngineWrapper* w) {
	void* DLL = FPlatformProcess::GetDllHandle(TEXT("c:\\Luprex\\build\\visual\\luprexlib.dll"));
	if (DLL != nullptr) {
		using InitFn = void (*)(EngineWrapper*);
		InitFn init = (InitFn)FPlatformProcess::GetDllExport(DLL, TEXT("init_engine_wrapper"));
		if (init != nullptr) {
			init(w);
			w->hook_dprint(engineutil::DPrintHook);
		}
	}
}

// The DPrint array.  This stores the dprints
// until they can be collected by the console implementation.
static TArray<FString> dprint_array;
static FCriticalSection dprint_mutex;

void DPrint(const FString& fs) {
	FScopeLock lk(&dprint_mutex);
	dprint_array.Emplace(fs);
}

void DPrint(const char* msg) {
	FScopeLock lk(&dprint_mutex);
	dprint_array.Emplace(msg);
}

void DPrintHook(const char* msg, size_t len) {
	FScopeLock lk(&dprint_mutex);
	dprint_array.Emplace(len, (const UTF8CHAR*)msg);
}

TArray<FString> DPrintGetStored() {
	FScopeLock lk(&dprint_mutex);
	TArray<FString> result = std::move(dprint_array);
	dprint_array.Empty();
	return result;
}

void ConsoleOutput::Append(const FString& text) {
	if (!text.IsEmpty()) {
		Content += text;
		Truncate();
		Dirty = true;
	}
}

void ConsoleOutput::AppendLine(const FString& text) {
	int csize = Content.Len();
	if ((csize > 0) && (Content[csize - 1] != '\n')) {
		Content += TEXT("\n");
	}
	Content += text;
	Content += TEXT("\n");
	Truncate();
	Dirty = true;
}

void ConsoleOutput::Truncate() {
	int lines = 50;
	int csize = Content.Len();
	int total = 0;
	for (int i = csize - 1; i >= 0; i--) {
		if (Content[i] == '\n') {
			total += 1;
			if (total == lines) {
				Content = Content.RightChop(i + 1);
				return;
			}
		}
	}
}

AActor* CreateTangible(UWorld *w, UClass* uclass) {
	FVector location;
	FRotator rotation;
	FActorSpawnParameters params;
	AActor *result = w->SpawnActor(uclass, &location, &rotation, params);
	return result;
}

} // namespace engineutil