// UUIDTest.cpp

#include "Globals.h"
#include "UUID.h"

#include <numeric>  // for std::iota


/** Test that FromString -> ToShortString preserves the original value for short UUIDs. */
static void UUIDFromStringToShortString()
{
	const char TestStrings[][33]{
		"0123456789abcdef0123456789ABCDEF",
		"d188b2648cc311e7bb31be2e44b06b34",
		"e760d270d8b34288b895d9f78a31e083",
		"7052f2f2594246abb8e3fed602158870",
		"7f14d4b60cd84ba7885c8301b67ce891",
		"57be7039250548b590af272291fabcfa"
	};

	for (auto TestString : TestStrings)
	{
		cUUID UUID;
		assert_test(UUID.FromString(TestString));
		auto ResultString = UUID.ToShortString();
		// Result should be equivalent to original
		assert_test(NoCaseCompare(ResultString, TestString) == 0);
		// And should be all lower case
		assert_test(ResultString == StrToLower(ResultString));
	}
}





/** Test that FromString -> ToLongString preserves the original value for long UUIDs. */
static void UUIDFromStringToLongString()
{
	const char TestStrings[][37]{
		"01234567-89ab-cdef-0123-456789ABCDEF",
		"d188b264-8cc3-11e7-bb31-be2e44b06b34",
		"e760d270-d8b3-4288-b895-d9f78a31e083",
		"7052f2f2-5942-46ab-b8e3-fed602158870",
		"7f14d4b6-0cd8-4ba7-885c-8301b67ce891",
		"57be7039-2505-48b5-90af-272291fabcfa"
	};

	for (auto TestString : TestStrings)
	{
		cUUID UUID;
		assert_test(UUID.FromString(TestString));
		auto ResultString = UUID.ToLongString();
		// Result should be equivalent to original
		assert_test(NoCaseCompare(ResultString, TestString) == 0);
		// And should be all lower case
		assert_test(ResultString == StrToLower(ResultString));
	}
}





/** Test that FromRaw -> ToRaw preserves the original value. */
static void UUIDFromRawToRaw()
{
	std::array<Byte, 16> TestData[16]{};
	// Fill test data with all values 0 - 255
	for (int i = 0; i != 16; ++i)
	{
		std::iota(begin(TestData[i]), end(TestData[i]), i * 16);
	}

	for (const auto & TestRaw : TestData)
	{
		cUUID UUID;
		UUID.FromRaw(TestRaw);
		auto ResultRaw = UUID.ToRaw();
		assert_test(ResultRaw == TestRaw);
	}
}





/** Test that IsNil correctly identifies nil UUIDs. */
static void UUIDNil()
{
	const auto NilString    = "00000000-0000-0000-0000-000000000000";
	const auto NonNilString = "e760d270-d8b3-4288-b895-d9f78a31e083";

	{
		cUUID UUID;
		assert_test(UUID.FromString(NilString));
		assert_test(UUID.IsNil());
	}
	{
		cUUID UUID;
		assert_test(UUID.FromString(NonNilString));
		assert_test(!UUID.IsNil());
	}
}





int main(int argc, char * argv[])
{
	LOG("UUID tests started");

	LOG("Testing short string UUIDs");
	UUIDFromStringToShortString();

	LOG("Testing long strings UUIDs");
	UUIDFromStringToLongString();

	LOG("Testing raw UUIDs");
	UUIDFromRawToRaw();

	LOG("Testing nil UUIDs");
	UUIDNil();

	LOG("UUID tests finished");
}