#ifndef _RENDERER_H_
#define _RENDERER_H_

#include <vector>
#include <GL/glut.h>
#include <time.h>
#include <iostream>

#include "structs.h"
#include "Subdivision.h"

#define VPD_MIN     200
#define VPD_DEFAULT 800
#define VPD_MAX     1024

#define VIEWDIST_DEFAULT 8.0
#define VIEWDIST_MIN     0.0
#define VIEWDIST_MAX     16.0

class Renderer {
    public:

        //Members
        static inline Renderer* getInstance() {
            return & m_instance;
        }

        std::vector<Point> *points;
        std::vector<Triangle> *triangles;
        
        //Used for rotating the thing with the trackball
        GLfloat currModelTransform[16];

        //Initialization
        void init(int *argc, char** argv);

        //Accessors
        inline int getVPD() {
            return vpd;
        }

        inline float getViewDist() {
            return this->viewDist;
        }

        //Modifiers
        inline void multViewDist( float by ) {
            if (dist == 79) {
                return;
            }
            dist++;
            this->viewDist *= by;
            glutPostRedisplay();
        }

        inline void divViewDist( float by ) {
            if (dist == 0) {
                return;
            }
            dist--;
            this->viewDist /= by;
            glutPostRedisplay();
        }

        //View Handling
        GLvoid window_resize(GLint vpw, GLint vph);

        //Utility
        void render();

        bool animate;

    private:

        //Members
        static Renderer m_instance;
        int windowID;
        int vpd;
        GLuint sceneID;
        GLfloat viewDist;

        int dist;

        //Constructor
        inline Renderer() {
            points = new std::vector<Point>;
            triangles = new std::vector<Triangle>;
            vpd = VPD_DEFAULT;
            viewDist = VIEWDIST_DEFAULT;
            animate = false;
            rotAngle1 = rotAngle2 = 0;
            dAngle1 = .57;
            dAngle2 = .71;
            dist = 62;
        }

        float rotAngle1, rotAngle2;
        float dAngle1, dAngle2;

        //Initialization
        GLint init_glut(int *argc, char** argv);
        void generateNormals();
        void init_opengl();

        //Methods
        GLvoid set_material_properties(GLfloat r, GLfloat g, GLfloat b);
        GLvoid init_lightsource();
        GLuint init_sceneList();
        GLvoid create_scene();        

};

#endif