#pragma once

#include "CoreTypes.h"
#include "Miscellaneous/PreprocessorHelpers.h"

#undef NDEBUG
#include <cassert>

NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)

NAMESPACE_PRIVATE_BEGIN

class FRecursionScopeMarker
{
public:

	FRecursionScopeMarker(uint8& InCounter) : Counter(InCounter) { ++Counter; }
	~FRecursionScopeMarker() { --Counter; }

private:

	uint8& Counter;

};

#define RS_CHECK_IMPL(InExpr)						assert(InExpr)
#define RS_CHECK_F_IMPL(InExpr, InFormat, ...)		assert(InExpr)

NAMESPACE_PRIVATE_END

#define always_check(InExpr)						RS_CHECK_IMPL(InExpr)
#define always_checkf(InExpr, InFormat, ...)		RS_CHECK_F_IMPL(InExpr, InFormat, ##__VA_ARGS__)
#define always_check_no_entry()						always_checkf(false, "Enclosing block should never be called.")
#define always_check_no_reentry()					{ static bool PREPROCESSOR_JOIN(bBeenHere, __LINE__) = false; always_checkf(!PREPROCESSOR_JOIN(bBeenHere, __LINE__), "Enclosing block was called more than once."); PREPROCESSOR_JOIN(bBeenHere, __LINE__) = true; }
#define always_check_no_recursion()					static uint8 PREPROCESSOR_JOIN(RecursionCounter, __LINE__) = 0; always_checkf(PREPROCESSOR_JOIN(RecursionCounter, __LINE__) == 0, "Enclosing block was entered recursively."); const NAMESPACE_REDCRAFT::NAMESPACE_PRIVATE::FRecursionScopeMarker PREPROCESSOR_JOIN(ScopeMarker, __LINE__)(PREPROCESSOR_JOIN(RecursionCounter, __LINE__))
#define always_unimplemented()						always_checkf(false, "Unimplemented function called.")

#if BUILD_DEBUG

#	define check(InExpr)							always_check(InExpr)
#	define checkf(InExpr, InFormat, ...)			always_checkf(InExpr, InFormat, ##__VA_ARGS__)
#	define check_no_entry()							always_check_no_entry()
#	define check_no_reentry()						always_check_no_reentry()
#	define check_no_recursion()						always_check_no_recursion()
#	define verify(InExpr)							always_check(InExpr)
#	define verifyf(InExpr, InFormat, ...)			always_checkf(InExpr, InFormat, ##__VA_ARGS__)
#	define unimplemented()							always_unimplemented()

#else

#	define check(InExpr)
#	define checkf(InExpr, InFormat, ...)
#	define check_no_entry()
#	define check_no_reentry()
#	define check_no_recursion()
#	define verify(InExpr)							{ if(InExpr) { } }
#	define verifyf(InExpr, InFormat, ...)			{ if(InExpr) { } }
#	define unimplemented()

#endif

NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END