#include <Nazara/Core/StringExt.hpp>
#include <catch2/catch_approx.hpp>
#include <catch2/catch_test_macros.hpp>

SCENARIO("String", "[CORE][STRING]")
{
	std::string unicodeString("\u00E0\u00E9\u00E7\u0153\u00C2\u5B98\u46E1");

	WHEN("Checking if string ends with")
	{
		CHECK(Nz::EndsWith("", ""));
		CHECK(Nz::EndsWith("Nazara Engine", ""));
		CHECK(Nz::EndsWith("Nazara Engine", "Engine"));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "engine"));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", " ngine"));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "NazaraEngine"));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "Nazara"));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "Sir Nazara van Engine"));

		CHECK(Nz::EndsWith("", "", Nz::CaseIndependent{}));
		CHECK(Nz::EndsWith("Nazara Engine", "", Nz::CaseIndependent{}));
		CHECK(Nz::EndsWith("Nazara Engine", "Engine", Nz::CaseIndependent{}));
		CHECK(Nz::EndsWith("Nazara Engine", "engine", Nz::CaseIndependent{}));
		CHECK(Nz::EndsWith("Nazara engine", "EnGiNe", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", " ngine", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "NazaraEngine", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "Nazara", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::EndsWith("Nazara Engine", "Sir Nazara van Engine", Nz::CaseIndependent{}));

		CHECK(Nz::EndsWith("L'\u00CEle de R\u00E9", "", Nz::UnicodeAware{}));
		CHECK(Nz::EndsWith("L'\u00CEle de R\u00E9", "R\u00E9", Nz::UnicodeAware{}));
		CHECK_FALSE(Nz::EndsWith("L'\u00CEle de R\u00E9", "Long long j\u00F4hnson", Nz::UnicodeAware{}));

		CHECK(Nz::EndsWith("L'\u00CEle de R\u00E9", "", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
		CHECK(Nz::EndsWith("L'\u00CEle de R\u00E9", "R\u00C9", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
		CHECK_FALSE(Nz::EndsWith("L'\u00CEle de R\u00E9", "Long long j\u00F4hnson", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
	}

	WHEN("Converting string back and forth")
	{
		CHECK(Nz::FromUtf16String(Nz::ToUtf16String(unicodeString)) == unicodeString);
		CHECK(Nz::FromUtf32String(Nz::ToUtf32String(unicodeString)) == unicodeString);
	}

	WHEN("Fetching words")
	{
		CHECK(Nz::GetWord({}, 0).empty());
		CHECK(Nz::GetWord("  ", 0).empty());

		std::string sentence = "\nSay hello\tto    Nazara\u00A0Engine\n\t!  "; //< \u00A0 is a No-Break Space
		CHECK(Nz::GetWord(sentence, 0) == "Say");
		CHECK(Nz::GetWord(sentence, 1) == "hello");
		CHECK(Nz::GetWord(sentence, 2) == "to");
		CHECK(Nz::GetWord(sentence, 3) == "Nazara\u00A0Engine");
		CHECK(Nz::GetWord(sentence, 4) == "!");
		CHECK(Nz::GetWord(sentence, 5).empty());

		// Try the same using Unicode aware overloads
		CHECK(Nz::GetWord(sentence, 0, Nz::UnicodeAware{}) == "Say");
		CHECK(Nz::GetWord(sentence, 1, Nz::UnicodeAware{}) == "hello");
		CHECK(Nz::GetWord(sentence, 2, Nz::UnicodeAware{}) == "to");
		CHECK(Nz::GetWord(sentence, 3, Nz::UnicodeAware{}) == "Nazara");
		CHECK(Nz::GetWord(sentence, 4, Nz::UnicodeAware{}) == "Engine");
		CHECK(Nz::GetWord(sentence, 5, Nz::UnicodeAware{}) == "!");
		CHECK(Nz::GetWord(sentence, 6, Nz::UnicodeAware{}).empty());
	}

	WHEN("Checking if string is number")
	{
		CHECK(Nz::IsNumber("123456"));
		CHECK(Nz::IsNumber("-123456"));
		CHECK_FALSE(Nz::IsNumber(""));
		CHECK_FALSE(Nz::IsNumber("-"));
		CHECK_FALSE(Nz::IsNumber("123 "));
		CHECK_FALSE(Nz::IsNumber("Nazara Engine"));
		CHECK_FALSE(Nz::IsNumber("12345Nazara Engine"));
	}

	WHEN("Matching patterns")
	{
		CHECK(Nz::MatchPattern("Lynix", "?????"));
		CHECK(Nz::MatchPattern("Lynix", "*Lynix"));
		CHECK(Nz::MatchPattern("Lynox", "*Lyn?x"));
		CHECK_FALSE(Nz::MatchPattern("Lynix", "Lynixx"));
		CHECK_FALSE(Nz::MatchPattern("Lynix", "Ly"));
		CHECK_FALSE(Nz::MatchPattern("", "?"));
		CHECK_FALSE(Nz::MatchPattern("", "*"));

		const char* pattern = "Naz?ra *gine";
		CHECK(Nz::MatchPattern("Nazara Engine", pattern));
		CHECK(Nz::MatchPattern("Nazora engine", pattern));
		CHECK(Nz::MatchPattern("Nazora Biggine", pattern));
		CHECK(Nz::MatchPattern("Nazora gine", pattern));

		CHECK_FALSE(Nz::MatchPattern("Nazaragine", pattern));
		CHECK_FALSE(Nz::MatchPattern("Nazorra Engine", pattern));
		CHECK_FALSE(Nz::MatchPattern("Nazra Engine", pattern));
		CHECK_FALSE(Nz::MatchPattern("NazaraEngine", pattern));
	}

	WHEN("Converting pointers to string")
	{
		CHECK(Nz::TrimRight(Nz::PointerToString(nullptr), '0') == "0x");

		const void* ptr = Nz::BitCast<const void*>(static_cast<std::uintptr_t>(0xDEADBEEF));
		CHECK(Nz::MatchPattern(Nz::PointerToString(ptr), "0x*DEADBEEF"));
	}

	WHEN("Replacing strings")
	{
		std::string str = "Nazara Engine";
		REQUIRE(Nz::ReplaceStr(str, "Nazara", "Unreal") == "Unreal Engine");
		REQUIRE(Nz::ReplaceStr(str, "Engine", "Reality") == "Unreal Reality");
		REQUIRE(Nz::ReplaceStr(str, "Unreal Reality", "Ungine") == "Ungine");
	}

	WHEN("Getting substring of unicode strings")
	{
		std::string_view str = "\u00E0\u00E9\u00E7\u0153\u00C2\u5B98";
		CHECK(Nz::Substring(str, 0, 150, Nz::UnicodeAware{}) == "\u00E0\u00E9\u00E7\u0153\u00C2\u5B98");
		CHECK(Nz::Substring(str, 1, Nz::UnicodeAware{}) == "\u00E9\u00E7\u0153\u00C2\u5B98");
		CHECK(Nz::Substring(str, 1, 2, Nz::UnicodeAware{}) == "\u00E9\u00E7");
		CHECK(Nz::Substring(str, 1, 10, Nz::UnicodeAware{}) == "\u00E9\u00E7\u0153\u00C2\u5B98");
	}

	WHEN("Checking if string starts with")
	{
		CHECK(Nz::StartsWith("Nazara Engine", ""));
		CHECK(Nz::StartsWith("Nazara Engine", "Nazara"));
		CHECK_FALSE(Nz::StartsWith("Nazara Engine", "Navara"));
		CHECK_FALSE(Nz::StartsWith("Nazara Engine", "NaZaRa"));
		CHECK_FALSE(Nz::StartsWith("Nazara Engine", "Long long johnson"));

		CHECK(Nz::StartsWith("NAZARA Engine", "", Nz::CaseIndependent{}));
		CHECK(Nz::StartsWith("NAZARA Engine", "Nazara", Nz::CaseIndependent{}));
		CHECK(Nz::StartsWith("NAZARA Engine", "NaZaRa", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::StartsWith("NAZARA Engine", "NavaRa", Nz::CaseIndependent{}));
		CHECK_FALSE(Nz::StartsWith("NAZARA Engine", "Long long johnson", Nz::CaseIndependent{}));

		CHECK(Nz::StartsWith("L'\u00CEle de R\u00E9", "", Nz::UnicodeAware{}));
		CHECK(Nz::StartsWith("L'\u00CEle de R\u00E9", "L'\u00CEle", Nz::UnicodeAware{}));
		CHECK_FALSE(Nz::StartsWith("L'\u00CEle de R\u00E9", "Long long j\u00F4hnson", Nz::UnicodeAware{}));

		CHECK(Nz::StartsWith("L'\u00CEle de R\u00E9", "", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
		CHECK(Nz::StartsWith("L'\u00CEle de R\u00E9", "l'\u00EEle", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
		CHECK_FALSE(Nz::StartsWith("L'\u00CEle de R\u00E9", "Long long j\u00F4hnson", Nz::CaseIndependent{}, Nz::UnicodeAware{}));
	}

	WHEN("Converting between lower and upper")
	{
		CHECK(Nz::ToLower("Nazara Engine") == "nazara engine");
		CHECK(Nz::ToLower("L'\u00CELE DE R\u00C9", Nz::UnicodeAware{}) == "l'\u00EEle de r\u00E9");
		CHECK(Nz::ToUpper("Nazara Engine") == "NAZARA ENGINE");
		CHECK(Nz::ToUpper("l'\u00EEle de r\u00E9", Nz::UnicodeAware{}) == "L'\u00CELE DE R\u00C9");
	}

	WHEN("Trimming strings")
	{
		CHECK(Nz::Trim(" \n  Hello World\t") == "Hello World");
		CHECK(Nz::Trim("Nazara Engin", 'n') == "Nazara Engi");
		CHECK(Nz::Trim("Nazara Engin", 'n', Nz::CaseIndependent{}) == "azara Engi");
		CHECK(Nz::Trim(unicodeString, Nz::UnicodeAware{}) == unicodeString);
		CHECK(Nz::Trim("\n\t" + unicodeString + "\t ", Nz::UnicodeAware{}) == unicodeString);
		CHECK(Nz::Trim(unicodeString, U'\u46E1', Nz::UnicodeAware{}) == "\u00E0\u00E9\u00E7\u0153\u00C2\u5B98");
		CHECK(Nz::Trim(unicodeString, Nz::Unicode::Category_Letter, Nz::UnicodeAware{}) == "");
	}
}

TEST_CASE("NumberToString", "[MATH][ALGORITHM]")
{
	SECTION("0 to string")
	{
		REQUIRE(Nz::NumberToString(0) == "0");
	}

	SECTION("235 to string")
	{
		REQUIRE(Nz::NumberToString(235) == "235");
	}

	SECTION("-235 to string")
	{
		REQUIRE(Nz::NumberToString(-235) == "-235");
	}

	SECTION("16 in base 16 to string")
	{
		REQUIRE(Nz::NumberToString(16, 16) == "10");
	}
}

TEST_CASE("StringToNumber", "[MATH][ALGORITHM]")
{
	SECTION("235 in string")
	{
		REQUIRE(Nz::StringToNumber("235") == 235);
	}

	SECTION("-235 in string")
	{
		REQUIRE(Nz::StringToNumber("-235") == -235);
	}

	SECTION("235 157 in string")
	{
		REQUIRE(Nz::StringToNumber("235 157") == 235157);
	}

	SECTION("16 in base 16 in string")
	{
		REQUIRE(Nz::StringToNumber("10", 16) == 16);
	}

	SECTION("8 in base 4 in string should not be valid")
	{
		bool ok = true;
		REQUIRE(Nz::StringToNumber("8", 4, &ok) == 0);
		REQUIRE(!ok);
	}
}