// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "Geometry.h"
#include "render.h"
#include "logs.h"

namespace easy2d
{
	//-------------------------------------------------------
	// Geometry
	//-------------------------------------------------------

	Geometry::Geometry()
	{
	}

	Geometry::~Geometry()
	{
	}

	float Geometry::GetLength()
	{
		float length = 0.f;
		if (geo_)
		{
			// no matter it failed or not
			geo_->ComputeLength(
				ConvertToD2DMatrix(GetTransformMatrix()),
				&length
			);
		}
		return length;
	}

	bool Geometry::ComputePointAt(float length, Point* point, Point* tangent)
	{
		if (geo_)
		{
			D2D1_POINT_2F point_tmp, tangent_tmp;
			if (SUCCEEDED(geo_->ComputePointAtLength(
				length,
				ConvertToD2DMatrix(GetTransformMatrix()),
				&point_tmp,
				&tangent_tmp)))
			{
				(*point).x = point_tmp.x;
				(*point).y = point_tmp.y;
				(*tangent).x = tangent_tmp.x;
				(*tangent).y = tangent_tmp.y;
				return true;
			}
		}
		return false;
	}

	bool Geometry::ContainsPoint(Point const & point)
	{
		if (!geo_)
			return false;

		BOOL ret = 0;
		// no matter it failed or not
		geo_->FillContainsPoint(
			point,
			ConvertToD2DMatrix(GetTransformMatrix()),
			&ret
		);
		return !!ret;
	}

	GeometryRelation Geometry::GetRelationWith(spGeometry const & other)
	{
		if (!geo_ || !other->geo_)
			return GeometryRelation::Unknown;

		cpTransformedGeometry transformed;
		HRESULT hr = devices::Graphics::Instance()->CreateTransformedGeometry(
			transformed,
			GetTransformMatrix(),
			geo_.Get()
		);

		D2D1_GEOMETRY_RELATION relation = D2D1_GEOMETRY_RELATION_UNKNOWN;
		
		if (SUCCEEDED(hr))
		{
			transformed->CompareWithGeometry(
				other->geo_.Get(),
				ConvertToD2DMatrix(other->GetTransformMatrix()),
				&relation
			);
		}
		return GeometryRelation(relation);
	}


	//-------------------------------------------------------
	// RectangleGeometry
	//-------------------------------------------------------

	RectangleGeometry::RectangleGeometry()
	{
	}

	RectangleGeometry::RectangleGeometry(Size const & rect_size)
	{
		SetSize(rect_size);
	}

	RectangleGeometry::~RectangleGeometry()
	{
	}

	void RectangleGeometry::SetSize(Size const & rect_size)
	{
		cpRectangleGeometry geo;
		if (SUCCEEDED(devices::Graphics::Instance()->CreateRectangleGeometry(geo, Rect(Point{}, rect_size))))
		{
			geo_ = geo;
			size_ = rect_size;
		}
	}


	//-------------------------------------------------------
	// CircleGeometry
	//-------------------------------------------------------

	CircleGeometry::CircleGeometry()
	{
	}

	CircleGeometry::CircleGeometry(float radius)
	{
		SetRadius(radius);
	}

	CircleGeometry::~CircleGeometry()
	{
	}

	void CircleGeometry::SetRadius(float radius)
	{
		cpEllipseGeometry geo;
		if (SUCCEEDED(devices::Graphics::Instance()->CreateEllipseGeometry(geo, Point{}, radius, radius)))
		{
			geo_ = geo;
			radius_ = radius;
		}
	}


	//-------------------------------------------------------
	// EllipseGeometry
	//-------------------------------------------------------

	EllipseGeometry::EllipseGeometry()
	{
	}

	EllipseGeometry::EllipseGeometry(float radius_x, float radius_y)
	{
		SetRadius(radius_x, radius_y);
	}

	EllipseGeometry::~EllipseGeometry()
	{
	}

	void EllipseGeometry::SetRadius(float radius_x, float radius_y)
	{
		cpEllipseGeometry geo;
		if (SUCCEEDED(devices::Graphics::Instance()->CreateEllipseGeometry(geo, Point{}, radius_x, radius_y)))
		{
			geo_ = geo;
			radius_x_ = radius_x;
			radius_y_ = radius_y;
		}
	}


	//-------------------------------------------------------
	// PathGeometry
	//-------------------------------------------------------

	PathGeometry::PathGeometry()
	{
	}

	PathGeometry::~PathGeometry()
	{
	}

	void PathGeometry::BeginPath()
	{
		current_geometry_ = nullptr;

		ThrowIfFailed(
			devices::Graphics::Instance()->CreatePathGeometry(current_geometry_)
		);

		ThrowIfFailed(
			current_geometry_->Open(&current_sink_)
		);

		current_sink_->BeginFigure(D2D1::Point2F(), D2D1_FIGURE_BEGIN_FILLED);
	}

	void PathGeometry::EndPath(bool closed)
	{
		if (current_sink_)
		{
			current_sink_->EndFigure(closed ? D2D1_FIGURE_END_CLOSED : D2D1_FIGURE_END_OPEN);
			ThrowIfFailed(
				current_sink_->Close()
			);

			geo_ = current_geometry_;

			current_sink_ = nullptr;
			current_geometry_ = nullptr;
		}
	}

	void PathGeometry::AddLine(Point const & point)
	{
		if (current_sink_)
			current_sink_->AddLine(point);
	}

	void PathGeometry::AddLines(std::vector<Point> const& points)
	{
		if (current_sink_)
		{
			if (!points.empty())
			{
				size_t size = points.size();
				std::vector<D2D1_POINT_2F> d2d_points(size);
				for (size_t i = 0; i < size; ++i)
				{
					d2d_points[i] = points[i];
				}

				current_sink_->AddLines(
					&d2d_points[0],
					static_cast<UINT32>(size)
				);
			}
		}
	}

	void PathGeometry::AddBezier(Point const & point1, Point const & point2, Point const & point3)
	{
		if (current_sink_)
		{
			current_sink_->AddBezier(
				D2D1::BezierSegment(
					point1,
					point2,
					point3
				)
			);
		}
	}

	void PathGeometry::ClearPath()
	{
		geo_ = nullptr;
		current_sink_ = nullptr;
		current_geometry_ = nullptr;
	}

}