#include "Testing/MiscellaneousTesting.h"

#include "Miscellaneous/AssertionMacros.h"
#include "Miscellaneous/Compare.h"

NAMESPACE_REDCRAFT_BEGIN
NAMESPACE_MODULE_BEGIN(Redcraft)
NAMESPACE_MODULE_BEGIN(Utility)

NAMESPACE_BEGIN(Testing)

void TestMiscellaneous()
{
	TestAssertionMacros();
	TestCompare();
}

NAMESPACE_UNNAMED_BEGIN

void TestNoEntry()
{
	check_no_entry();
	always_check_no_entry();
}

void TestNoReentry()
{
	check_no_reentry();
	always_check_no_reentry();
}

void TestNoRecursion(int32 Depth)
{
	if (Depth < 0) return;

	check_no_recursion();
	always_check_no_recursion();

	TestNoRecursion(--Depth);
}

void TestUnimplemented()
{
	unimplemented();
	always_unimplemented();
}

NAMESPACE_UNNAMED_END

void TestAssertionMacros()
{
	check(true);
	//check(false);
	checkf(true, TEXT("True!"));
	//checkf(false, TEXT("False!"));

	always_check(true);
	//always_check(false);
	always_checkf(true, TEXT("True!"));
	//always_checkf(false, TEXT("False!"));

	//TestNoEntry();

	TestNoReentry();
	//TestNoReentry();

	TestNoRecursion(0);
	TestNoRecursion(0);
	//TestNoRecursion(1);

	//TestUnimplemented();

	verify(true);
	//verify(false);

	int32 A = 1;
	int32 B = 0;
	verify(B = A);
	always_check(B == A);
}

NAMESPACE_UNNAMED_BEGIN

struct FTestPartialOrdering
{
	int32 Num;
	bool bIsValid;
	FTestPartialOrdering(int32 InNum, bool bInIsValid = true) : Num(InNum), bIsValid(bInIsValid) { }
	friend bool operator==(FTestPartialOrdering LHS, FTestPartialOrdering RHS) { return LHS.bIsValid && RHS.bIsValid ? LHS.Num == RHS.Num : false; }
	friend partial_ordering operator<=>(FTestPartialOrdering LHS, FTestPartialOrdering RHS) { return LHS.bIsValid && RHS.bIsValid ? LHS.Num <=> RHS.Num : partial_ordering::unordered; }
};

struct FTestWeakOrdering
{
	int32 Num;
	FTestWeakOrdering(int32 InNum) : Num(InNum) { }
	friend bool operator==(FTestWeakOrdering LHS, FTestWeakOrdering RHS) { return LHS.Num == RHS.Num; }
	friend weak_ordering operator<=>(FTestWeakOrdering LHS, FTestWeakOrdering RHS) { return LHS.Num <=> RHS.Num; }
};

struct FTestStrongOrdering
{
	int32 Num;
	FTestStrongOrdering(int32 InNum) : Num(InNum) { }
	friend bool operator==(FTestStrongOrdering LHS, FTestStrongOrdering RHS) { return LHS.Num == RHS.Num; }
	friend strong_ordering operator<=>(FTestStrongOrdering LHS, FTestStrongOrdering RHS) { return LHS.Num <=> RHS.Num; }
};

struct FTestSynth
{
	int32 A;
	FTestSynth(int32 InA) : A(InA) { }
	friend bool operator==(FTestSynth LHS, FTestSynth RHS) { return LHS.A == RHS.A; }
	friend bool operator< (FTestSynth LHS, FTestSynth RHS) { return LHS.A <  RHS.A; }
};

NAMESPACE_UNNAMED_END

void TestCompare()
{
	always_check((-1 <=>  0) == strong_ordering::less);
	always_check(( 0 <=>  0) == strong_ordering::equivalent);
	always_check(( 0 <=>  0) == strong_ordering::equal);
	always_check(( 0 <=> -1) == strong_ordering::greater);
	
	always_check((-1 <=>  0) <  0);
	always_check((-1 <=>  0) <= 0);
	always_check(( 0 <=>  0) <= 0);
	always_check(( 0 <=>  0) == 0);
	always_check(( 0 <=>  0) >= 0);
	always_check(( 0 <=> -1) >= 0);
	always_check(( 0 <=> -1) >  0);
	always_check((-1 <=>  1) != 0);

	int64 NaNBit = 0xFFF8000000000000;
	double NaN = *reinterpret_cast<double*>(&NaNBit);

	always_check((-1.0 <=>  0.0) == partial_ordering::less);
	always_check(( 0.0 <=>  0.0) == partial_ordering::equivalent);
	always_check(( 0.0 <=> -1.0) == partial_ordering::greater);
	always_check(( 0.0 <=>  NaN) == partial_ordering::unordered);

	always_check((-1.0 <=>  0.0) == weak_ordering::less);
	always_check(( 0.0 <=>  0.0) == weak_ordering::equivalent);
	always_check(( 0.0 <=> -1.0) == weak_ordering::greater);
	
	always_check((-1.0 <=>  0.0) == strong_ordering::less);
	always_check(( 0.0 <=>  0.0) == strong_ordering::equivalent);
	always_check(( 0.0 <=>  0.0) == strong_ordering::equal);
	always_check(( 0.0 <=> -1.0) == strong_ordering::greater);
	
	always_check((-1.0 <=>  0.0) <  0);
	always_check((-1.0 <=>  0.0) <= 0);
	always_check(( 0.0 <=>  0.0) <= 0);
	always_check(( 0.0 <=>  0.0) == 0);
	always_check(( 0.0 <=>  0.0) >= 0);
	always_check(( 0.0 <=> -1.0) >= 0);
	always_check(( 0.0 <=> -1.0) >  0);
	always_check((-1.0 <=>  1.0) != 0);
	
	always_check((FTestPartialOrdering(-1) <=> FTestPartialOrdering( 0)) == partial_ordering::less);
	always_check((FTestPartialOrdering( 0) <=> FTestPartialOrdering( 0)) == partial_ordering::equivalent);
	always_check((FTestPartialOrdering( 0) <=> FTestPartialOrdering(-1)) == partial_ordering::greater);

	always_check((FTestPartialOrdering( 0, true) <=> FTestPartialOrdering( 0, false)) == partial_ordering::unordered);
	
	always_check((FTestWeakOrdering(-1) <=> FTestWeakOrdering( 0)) == weak_ordering::less);
	always_check((FTestWeakOrdering( 0) <=> FTestWeakOrdering( 0)) == weak_ordering::equivalent);
	always_check((FTestWeakOrdering( 0) <=> FTestWeakOrdering(-1)) == weak_ordering::greater);
	
	always_check((FTestStrongOrdering(-1) <=> FTestStrongOrdering( 0)) == strong_ordering::less);
	always_check((FTestStrongOrdering( 0) <=> FTestStrongOrdering( 0)) == strong_ordering::equivalent);
	always_check((FTestStrongOrdering( 0) <=> FTestStrongOrdering( 0)) == strong_ordering::equal);
	always_check((FTestStrongOrdering( 0) <=> FTestStrongOrdering(-1)) == strong_ordering::greater);
	
	always_check((FTestPartialOrdering(-1) <  FTestPartialOrdering( 0)));
	always_check((FTestPartialOrdering( 0) == FTestPartialOrdering( 0)));
	always_check((FTestPartialOrdering( 0) >  FTestPartialOrdering(-1)));
	
	always_check((FTestWeakOrdering(-1) <  FTestWeakOrdering( 0)));
	always_check((FTestWeakOrdering( 0) == FTestWeakOrdering( 0)));
	always_check((FTestWeakOrdering( 0) >  FTestWeakOrdering(-1)));

	always_check((FTestStrongOrdering(-1) <  FTestStrongOrdering( 0)));
	always_check((FTestStrongOrdering( 0) == FTestStrongOrdering( 0)));
	always_check((FTestStrongOrdering( 0) >  FTestStrongOrdering(-1)));

	always_check((TIsSame<TCommonComparisonCategory<strong_ordering                                 >::Type, strong_ordering >::Value));
	always_check((TIsSame<TCommonComparisonCategory<strong_ordering, weak_ordering                  >::Type, weak_ordering   >::Value));
	always_check((TIsSame<TCommonComparisonCategory<strong_ordering, weak_ordering, partial_ordering>::Type, partial_ordering>::Value));

	always_check(CThreeWayComparable<int32>);
	always_check(CThreeWayComparable<FTestPartialOrdering>);
	always_check(CThreeWayComparable<FTestWeakOrdering>);
	always_check(CThreeWayComparable<FTestStrongOrdering>);

	always_check((CThreeWayComparableWith<bool, bool>));
	always_check((CThreeWayComparableWith<int16, int32>));

	always_check((TIsSame<TCompareThreeWayResult<int32               >::Type, strong_ordering >::Value));
	always_check((TIsSame<TCompareThreeWayResult<float               >::Type, partial_ordering>::Value));
	always_check((TIsSame<TCompareThreeWayResult<FTestPartialOrdering>::Type, partial_ordering>::Value));
	always_check((TIsSame<TCompareThreeWayResult<FTestWeakOrdering   >::Type, weak_ordering   >::Value));
	always_check((TIsSame<TCompareThreeWayResult<FTestStrongOrdering >::Type, strong_ordering >::Value));

	always_check((SynthThreeWayCompare(0, 0)   == strong_ordering::equal));
	always_check((SynthThreeWayCompare(0, 0.0) == strong_ordering::equal));

	always_check(SynthThreeWayCompare(FTestPartialOrdering(-1), FTestPartialOrdering( 0)) == partial_ordering::less);
	always_check(SynthThreeWayCompare(FTestPartialOrdering( 0), FTestPartialOrdering( 0)) == partial_ordering::equivalent);
	always_check(SynthThreeWayCompare(FTestPartialOrdering( 0), FTestPartialOrdering(-1)) == partial_ordering::greater);

	always_check(SynthThreeWayCompare(FTestPartialOrdering( 0, true), FTestPartialOrdering( 0, false)) == partial_ordering::unordered);
	
	always_check(SynthThreeWayCompare(FTestSynth(-1), FTestSynth( 0)) == weak_ordering::less);
	always_check(SynthThreeWayCompare(FTestSynth( 0), FTestSynth( 0)) == weak_ordering::equivalent);
	always_check(SynthThreeWayCompare(FTestSynth( 0), FTestSynth(-1)) == weak_ordering::greater);
}

NAMESPACE_END(Testing)

NAMESPACE_MODULE_END(Utility)
NAMESPACE_MODULE_END(Redcraft)
NAMESPACE_REDCRAFT_END