static_assert( __cplusplus > 2020'99 );

#include "../Enum.h"

#include <Alepha/Testing/test.h>
#include <Alepha/Testing/TableTest.h>

#include <Alepha/Utility/evaluation_helpers.h>

#include <Alepha/IOStreams/String.h>

namespace
{
	template< typename T >
	concept CanNegate=
	requires( const T &t )
	{
		{ not t };
	};
}

static auto init= Alepha::Utility::enroll <=[]
{
	using namespace Alepha::literals::enum_literals;
	using namespace Alepha::Testing::literals;

	using namespace Alepha::Testing::exports;

	using MyEnum= Alepha::Enum< "Adam"_value, "Baker"_value, "Charlie"_value, "David"_value >;

	"Enum round trip printing test"_test <= TableTest
	<
		[]( const std::string s ) -> std::string
		{
			MyEnum e;
			std::istringstream iss{ s };

			( iss >> e );
			return Alepha::IOStreams::String{} << e;
		}
	>
	::Cases
	{
		{ "Adam", { "Adam" }, "Adam" },
		{ "Charlie", { "Charlie" }, "Charlie" },
		{ "Wrong", { "Wrong" }, std::type_identity< Alepha::EnumTextMismatchError >{} },
	};

	"Enum failure parse"_test <= TableTest
	<
		[]( const std::string s )
		{
			try
			{
				MyEnum e;
				std::istringstream iss{ s };

				( iss >> e );
				throw "Fail";
			}
			catch( const Alepha::EnumTextMismatchError &ex )
			{
				return ex.expectedValues();
			}
		}
	>
	::Cases
	{
		{ "Wrong", { "Wrong" }, { "Adam", "Baker", "Charlie", "David" } },
	};

	static_assert( not CanNegate< Alepha::Enum< "one"_value > > );
	static_assert(     CanNegate< Alepha::Enum< "one"_value, "two"_value > > );
	static_assert( not CanNegate< Alepha::Enum< "one"_value, "two"_value, "three"_value > > );

	"Does negation of a two form enum work?"_test <=TableTest
	<
		[]( const Alepha::Enum< "No"_value, "Yes"_value > e )
		{
			return not e;
		}
	>
	::Cases
	{
		{ "No -> Yes", { "No"_value }, "Yes"_value },
		{ "Yes -> No", { "Yes"_value }, "No"_value },
	};
};