#include <psemek/test/test.hpp>

#include <psemek/ui/impl/size_polygon_utils.hpp>

#include <algorithm>

using namespace psemek;
using namespace psemek::ui::impl;

namespace
{

	template <typename T>
	std::set<T> as_set(std::vector<T> const & v)
	{
		std::set<T> result;
		for (auto const & x : v)
			result.insert(x);
		return result;
	}

	void check_polygon_min(size_polygon & polygon, size_polygon const & min_x, size_polygon const & min_y)
	{
		for (int i = 0; i < polygon.size(); ++i)
		{
			expect_equal(as_set(min(polygon, 0)), as_set(min_x));
			expect_equal(as_set(min(polygon, 1)), as_set(min_y));

			std::rotate(polygon.begin(), polygon.end() - 1, polygon.end());
		}
	}

}

test_case(ui_impl_size__polygon_min_empty)
{
	size_polygon polygon;

	expect_equal(min(polygon, 0), size_polygon{});
	expect_equal(min(polygon, 1), size_polygon{});
}

test_case(ui_impl_size__polygon_min_edge__X)
{
	size_polygon polygon{{0.f, 0.f}, {10.f, 0.f}};
	size_polygon min_x{{0.f, 0.f}};
	size_polygon min_y{{0.f, 0.f}, {10.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}

test_case(ui_impl_size__polygon_min_edge__Y)
{
	size_polygon polygon{{0.f, 0.f}, {0.f, 10.f}};
	size_polygon min_x{{0.f, 0.f}, {0.f, 10.f}};
	size_polygon min_y{{0.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}

test_case(ui_impl_size__polygon_min_edge__XY)
{
	size_polygon polygon{{0.f, 0.f}, {10.f, 10.f}};
	size_polygon min_x{{0.f, 0.f}};
	size_polygon min_y{{0.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}

test_case(ui_impl_size__polygon_min_square)
{
	size_polygon polygon{{0.f, 0.f}, {10.f, 0.f}, {10.f, 10.f}, {0.f, 10.f}};
	size_polygon min_x{{0.f, 0.f}, {0.f, 10.f}};
	size_polygon min_y{{0.f, 0.f}, {10.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}

test_case(ui_impl_size__polygon_min_diamond)
{
	size_polygon polygon{{0.f, 10.f}, {10.f, 0.f}, {20.f, 10.f}, {10.f, 20.f}};
	size_polygon min_x{{0.f, 10.f}};
	size_polygon min_y{{10.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}

test_case(ui_impl_size__polygon_min_octahedron)
{
	size_polygon polygon{{10.f, 0.f}, {20.f, 0.f}, {30.f, 10.f}, {30.f, 20.f}, {20.f, 30.f}, {10.f, 30.f}, {0.f, 20.f}, {0.f, 10.f}};
	size_polygon min_x{{0.f, 10.f}, {0.f, 20.f}};
	size_polygon min_y{{10.f, 0.f}, {20.f, 0.f}};

	check_polygon_min(polygon, min_x, min_y);
}