#pragma once

#include "typedefs.h"

namespace mt
{
	class Face
	{
		friend class Mesh;
	public:
		Face();
		Face(Vertex* a, Vertex* b, Vertex* c, Vertex* d = nullptr);
		Face(const VertexList& vertices);
		~Face();

		vec3 GetNormal() const;
		Plane GetPlane() const;

		bool IsTriangle() const;
		void FlipNormal();
		void FlipNormal(const vec3& dir);
		FaceList Triangulate();
		void FlipEdge();

		bool IsDegenerated() const;
		bool RegainIntegrity();

		const VertexList& GetVertices() const;
		FaceList GetFaces() const;
		const EdgeList& GetEdges() const;

		bool HasTag(int tag) const;
		bool HasTagsAny(const List<int>& tagsToCheck) const;
		bool HasTagsAll(const List<int>& tagsToCheck) const;
		void AddTag(int tag);
		void RemoveTag(int tag);
		List<int> GetTags() const;

		void SetMaterialId(int materialId);
		int GetMaterialId() const;
		//void SetUVGenerator(UVGeneratorBase* generator);
		//UVGeneratorBase* GetUVGenerator() const;

		List<unsigned int> GetIndices(bool allowQuads) const;

		void CopyProperties(Face* other, bool merge = false);
		Mesh* GetMesh() const;

		operator FaceList() { FaceList result; result.Add(const_cast<Face*>(this)); return result; }

	private:
		List<Triangle> GetTriangles() const;
		List<int> GetMetaIndices() const;

		List<int> tags;

		//UVGeneratorBase* uvGenerator;
		VertexList vertices;
		EdgeList edges;
		int materialId;
		Mesh* mesh;
	};
}