/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/.
 */

#include "Math/CoordinateSystem.hpp"
#include <catch2/catch_all.hpp>

using namespace OpenVulkano::Math;
using Catch::Approx;

TEST_CASE("CoordinateSystem - Construction", "[CoordinateSystem]")
{
	SECTION("Default constructor creates RIGHT_HANDED_Y_UP")
	{
		CoordinateSystem cs;
		REQUIRE(cs == CoordinateSystem::RIGHT_HANDED_Y_UP);
		REQUIRE(cs.GetHandedness() == CoordinateSystem::Handedness::Right);
		REQUIRE(cs.GetUpAxis() == CoordinateSystem::UpAxis::Y);
	}
	
	SECTION("Construct from System enum")
	{
		CoordinateSystem cs1(CoordinateSystem::RIGHT_HANDED_Y_UP);
		REQUIRE(cs1.GetHandedness() == CoordinateSystem::Handedness::Right);
		REQUIRE(cs1.GetUpAxis() == CoordinateSystem::UpAxis::Y);
		
		CoordinateSystem cs2(CoordinateSystem::RIGHT_HANDED_Z_UP);
		REQUIRE(cs2.GetHandedness() == CoordinateSystem::Handedness::Right);
		REQUIRE(cs2.GetUpAxis() == CoordinateSystem::UpAxis::Z);
		
		CoordinateSystem cs3(CoordinateSystem::LEFT_HANDED_Y_UP);
		REQUIRE(cs3.GetHandedness() == CoordinateSystem::Handedness::Left);
		REQUIRE(cs3.GetUpAxis() == CoordinateSystem::UpAxis::Y);
		
		CoordinateSystem cs4(CoordinateSystem::LEFT_HANDED_Z_UP);
		REQUIRE(cs4.GetHandedness() == CoordinateSystem::Handedness::Left);
		REQUIRE(cs4.GetUpAxis() == CoordinateSystem::UpAxis::Z);
	}
	
	SECTION("Construct from Handedness and UpAxis")
	{
		CoordinateSystem cs1(CoordinateSystem::Handedness::Right, CoordinateSystem::UpAxis::Y);
		REQUIRE(cs1 == CoordinateSystem::RIGHT_HANDED_Y_UP);
		
		CoordinateSystem cs2(CoordinateSystem::Handedness::Right, CoordinateSystem::UpAxis::Z);
		REQUIRE(cs2 == CoordinateSystem::RIGHT_HANDED_Z_UP);
		
		CoordinateSystem cs3(CoordinateSystem::Handedness::Left, CoordinateSystem::UpAxis::Y);
		REQUIRE(cs3 == CoordinateSystem::LEFT_HANDED_Y_UP);
		
		CoordinateSystem cs4(CoordinateSystem::Handedness::Left, CoordinateSystem::UpAxis::Z);
		REQUIRE(cs4 == CoordinateSystem::LEFT_HANDED_Z_UP);
	}
}

TEST_CASE("CoordinateSystem - Name conversion", "[CoordinateSystem]")
{
	SECTION("GetName returns correct string representation")
	{
		REQUIRE(CoordinateSystem(CoordinateSystem::RIGHT_HANDED_Y_UP).GetName() == "RIGHT_HANDED_Y_UP");
		REQUIRE(CoordinateSystem(CoordinateSystem::RIGHT_HANDED_Z_UP).GetName() == "RIGHT_HANDED_Z_UP");
		REQUIRE(CoordinateSystem(CoordinateSystem::LEFT_HANDED_Y_UP).GetName() == "LEFT_HANDED_Y_UP");
		REQUIRE(CoordinateSystem(CoordinateSystem::LEFT_HANDED_Z_UP).GetName() == "LEFT_HANDED_Z_UP");
	}
	
	SECTION("GetFromName parses valid names")
	{
		auto cs1 = CoordinateSystem::GetFromName("RIGHT_HANDED_Y_UP");
		REQUIRE(cs1.has_value());
		REQUIRE(cs1.value() == CoordinateSystem::RIGHT_HANDED_Y_UP);
		
		auto cs2 = CoordinateSystem::GetFromName("LEFT_HANDED_Z_UP");
		REQUIRE(cs2.has_value());
		REQUIRE(cs2.value() == CoordinateSystem::LEFT_HANDED_Z_UP);
	}
	
	SECTION("GetFromName returns nullopt for invalid names")
	{
		REQUIRE_FALSE(CoordinateSystem::GetFromName("INVALID_NAME").has_value());
		REQUIRE_FALSE(CoordinateSystem::GetFromName("").has_value());
		REQUIRE_FALSE(CoordinateSystem::GetFromName("right_handed_y_up").has_value());
	}
}

TEST_CASE("CoordinateSystem - Conversion operators", "[CoordinateSystem]")
{
	CoordinateSystem cs(CoordinateSystem::LEFT_HANDED_Z_UP);
	
	SECTION("Convert to System")
	{
		CoordinateSystem::System sys = cs;
		REQUIRE(sys == CoordinateSystem::LEFT_HANDED_Z_UP);
	}
	
	SECTION("Convert to Handedness")
	{
		CoordinateSystem::Handedness hand = cs;
		REQUIRE(hand == CoordinateSystem::Handedness::Left);
	}
	
	SECTION("Convert to UpAxis")
	{
		CoordinateSystem::UpAxis up = cs;
		REQUIRE(up == CoordinateSystem::UpAxis::Z);
	}
}