#pragma once

#include "GL/glew.h"
#include <GLFW/glfw3.h>

#include <vector>

#include "assimp\scene.h"
#include "assimp\mesh.h"
#include "../Shader.h"
#include "../SceneContext.h"
#include "../Dataset.h"

#include "../ModelView.h"

enum Transformation
{
	Rotation,
	Translation,
	Scaling
};

enum CullFace
{
	NONE = GL_NONE,
	FRONT = GL_FRONT,
	BACK = GL_BACK,
	FRONT_BACK = GL_FRONT_AND_BACK
};

enum RenderType
{
	OBJ,
	NO_INDEX
};

class Mesh
{
public:
	struct MeshEntry {
		enum BUFFERS {
			VERTEX_BUFFER, NORMAL_BUFFER, COLOR_BUFFER, TEXCOORD_BUFFER, INDEX_BUFFER
		};
		GLuint vao;
		GLuint vbo[5];

		unsigned int elementCount;
		RenderType renderType;
		unsigned int dset_size = 0;
		GLuint ssbo;
		glm::vec3 ssbo_data[3];
		aiColor3D dcolor;
		aiColor3D acolor;
		aiColor3D scolor;
		
		float shininessStrength;
		MeshEntry(aiMesh *mesh, const aiScene* scene, Mesh * m);
		MeshEntry(Dataset &set, Mesh *m);		
		~MeshEntry();
		Mesh * parent;	
		void render();	
	};

public:
	Mesh(const char *filename, Shader *sh);
	Mesh(Dataset &dataset, Shader *sh);
	~Mesh(void);	
	std::vector<MeshEntry*> meshEntries;

private:	
	std::vector<std::pair<glm::vec4, Transformation>> _transformations;
	
	void enableCulling();
	void disableCulling();
public:
	Model model;
	CullFace cullMode = NONE;	
	void effectTransformations();
	void addRotation(glm::vec4 vec);
	void addTranslation(glm::vec4 vec);
	void addScaling(glm::vec4 vec);
	glm::vec4 translateToPivot(glm::vec3);
	void removeLastTransformations(int n);
	glm::vec3 getPosition();

	Shader *shader; 
	void draw(SceneContext ctx);

};