/*
    3DS model loader
    � Keith O'Conor 2005
    keith.oconor @ {cs.tcd.ie, gmail.com}
*/

#ifndef MODEL3DS_H
#define MODEL3DS_H

#pragma warning(disable: 4786) //ignore truncated STL debug identifiers warnings

#include "ofMain.h"
#include "texture3DS.h"
#include "Vector3DS.h"

#include "ofx3DBaseLoader.h"

#include <iostream>
#include <fstream>
#include <vector>
#include <list>
#include <map>
#include <string>
#include <sstream>
#include <cctype>
#include <algorithm>
#include <functional>
#include <iostream>
#include <assert.h>

#define CHUNK_MAIN					0x4D4D
#define CHUNK_3D_EDITOR				0x3D3D
#define CHUNK_OBJECT_BLOCK			0x4000
#define CHUNK_MESH					0x4100
#define CHUNK_VERTICES				0x4110
#define CHUNK_FACES					0x4120
#define CHUNK_FACE_MATERIAL			0x4130
#define CHUNK_SMOOTHING_GROUP		0x4150
#define CHUNK_TEXCOORDS				0x4140
#define CHUNK_MATERIAL_BLOCK		0xAFFF
#define CHUNK_MATERIAL_NAME			0xA000
#define CHUNK_AMBIENT_COLOR			0xA010
#define CHUNK_DIFFUSE_COLOR			0xA020
#define CHUNK_SPECULAR_COLOR		0xA030
#define CHUNK_SPECULAR_EXPONENT		0xA040
#define CHUNK_SHININESS				0xA041
#define CHUNK_TRANSPARENCY			0xA050
#define CHUNK_MATERIAL_TWO_SIDED	0xA081
#define CHUNK_TEXTURE_MAP			0xA200
#define CHUNK_BUMP_MAP				0xA230
#define CHUNK_REFLECTION_MAP		0xA220
#define CHUNK_MAP_FILENAME			0xA300
#define CHUNK_RGB_FLOAT				0x0010
#define CHUNK_RGB_BYTE				0x0011
#define CHUNK_RGB_BYTE_GAMMA		0x0012
#define CHUNK_RGB_FLOAT_GAMMA		0x0013
#define CHUNK_PERCENT_INT			0x0030
#define CHUNK_PERCENT_FLOAT			0x0031

#define DRAW_IMMEDIATE_MODE			0x01
#define DRAW_VERTEX_ARRAY			0x02
#define DRAW_VBO					0x03

#define DEBUG_OUTPUT				false

class model3DS;
class mesh3DS;
class material3DS;

typedef unsigned short ushort;

   ///////////////////////////////////////////////////////
  // 3DS Material
 //  Describes a material to be used by a mesh3DS
/////////////////////////////////////////////////////

class material3DS{
private:
	std::string m_name;
	float m_diffuseColor[3];
	float m_ambientColor[3];
	float m_specularColor[3];
	float m_specularExponent;
	float m_shininess;
	float m_opacity;
	GLuint m_textureMapId;
	GLuint m_bumpMapId;
	bool m_hasTextureMap;
	bool m_hasBumpMap;
	bool m_twoSided;

public:
    material3DS():m_hasTextureMap(false),m_hasBumpMap(false),m_twoSided(false){}
	void loadTexture(std::string filename, int mapType);

	std::string getName()const{return m_name;}
	const float* getDiffuseColor()const{return m_diffuseColor;}
	const float* getAmbientColor()const{return m_ambientColor;}
	const float* getSpecularColor()const{return m_specularColor;}
	float getSpecularExponent()const{return m_specularExponent;}
	float getShininess()const{return m_shininess;}
	float getOpacity()const{return m_opacity;}
	GLuint getTextureMapId()const{return m_textureMapId;}
	GLuint getBumpMapId()const{return m_bumpMapId;}
	bool hasTextureMap()const{return m_hasTextureMap;}
	bool hasBumpMap()const{return m_hasBumpMap;}
	bool isTwoSided()const{return m_twoSided;}

	void setName(const std::string newName){m_name = newName;}
	void setDiffuseColor(const float* newColor){memcpy(m_diffuseColor,newColor,sizeof(float)*3);}
	void setAmbientColor(const float* newColor){memcpy(m_ambientColor,newColor,sizeof(float)*3);}
	void setSpecularColor(const float* newColor){memcpy(m_specularColor,newColor,sizeof(float)*3);}
	void setShininess(const float newShininess){m_shininess = newShininess;}
	void setSpecularExponent(const float newExponent){m_specularExponent = newExponent;}
	void setOpacity(const float newOpacity){m_opacity = newOpacity;}
	void setTwoSided(const bool isTwoSided){m_twoSided = isTwoSided;}

};

   ///////////////////////////////////////////////////////
  // 3DS Mesh
 //  Contains all vertex, face, texcoord & normal data
///////////////////////////////////////////////////////

class mesh3DS{
private:
    std::string m_name;
    std::string m_materialName;
	model3DS *m_parentModel;

	std::vector<float> m_vertices;
	std::vector<float> m_normals;
    std::vector<ushort> m_faces;
	std::vector<unsigned int> m_faceSmoothing;
    std::vector<float> m_texcoords;
	std::map<std::string, std::vector<ushort> > m_materialFaces;

	//VBO IDs
	GLuint m_verticesArrayId;
    GLuint m_normalsArrayId;
    GLuint m_texcoordsArrayId;

	unsigned int m_drawMode;

public:

	mesh3DS(model3DS *parentModel):m_parentModel(parentModel){}

    void buildMesh();
	void calculateNormals();
	void sortFacesByMaterial();
	void draw();

	void addVertex(const float vertex){m_vertices.push_back(vertex);}
	void addFaceIndex(const ushort faceIndex){m_faces.push_back(faceIndex);}
	void addMaterialFace(const std::string &name, const ushort faceIndex){m_materialFaces[name].push_back(faceIndex);}
	void addFaceSmoothing(const unsigned int smoothing){m_faceSmoothing.push_back(smoothing);}
	void addTexcoord(const float texcoord){m_texcoords.push_back(texcoord);}

    std::string getMaterial()const{return m_materialName;}
	std::string getName()const{return m_name;}
	int getNumFaces()const{return (int)m_faces.size();}

	void setMaterial(const std::string &newMat){m_materialName = newMat;}
    void setName(const std::string newName){m_name = newName;}
	void setDrawMode(const unsigned int newDrawMode){m_drawMode = newDrawMode;}
};

   //////////////////////////////////////////////////////////////////
  // 3DS Model
 //  Contains all the meshes & materials that make up a 3DS model
//////////////////////////////////////////////////////////////////

typedef struct{
	float minX,maxX;
	float minY,maxY;
	float minZ,maxZ;
} boundingBox3DS;

class model3DS : public ofx3DBaseLoader{
private:
    std::string m_filename;
	std::string m_filepath;
    std::vector<mesh3DS> m_meshes;
    std::map<std::string, material3DS> m_materials;
	unsigned int m_drawMode;
	boundingBox3DS m_boundingBox;
	float m_scale;
	float m_centerX, m_centerY, m_centerZ;

	// temporaries used while reading chunks
	mesh3DS *m_currentMesh;
	material3DS *m_currentMaterial;
	std::vector<material3DS> *m_currentMaterialFaces;
	float m_currentColor[3];
	ushort m_tempUshort;
	float m_tempFloat;
	std::string m_tempString;

	void readChunk(std::ifstream *modelFile, const int objectStart, const int objectLength);

	// Private copy and assignment constructors
	// to prevent object being copied
	model3DS(const model3DS &model);
	model3DS &operator=(const model3DS &model);

public:
	model3DS();
	void loadModel(const char* filename, float scale = 1);
	void loadModel(string filename, float scale);	
    void draw();

    std::string getFilename(){return m_filename;}
	const material3DS& getMaterial(const std::string &matName){return m_materials[matName];}
};

#endif //MODEL3DS_H