#ifndef CAMERA_H
#define CAMERA_H

#include "../math/Vector3D.h"
#include "../math/Matrix3D.h"
#include "../math/Matrix3DStack.h"

class Shader
{
public:
    Shader();
    Shader(const Shader& orig);
    virtual ~Shader();
    
    void set3DMode(float lag);
    void set2DMode();
    
    void storeCamera();
    void setCamera(float x, float y, float z, float length, float width);

    const Vector3D& getFront() const;
    const Vector3D& getBack() const;
    const Vector3D& getRight() const;
    const Vector3D& getLeft() const;
    const Vector3D& getUp() const;
    const Vector3D& getDown() const;
    
    void setTextureEnabled(bool use);
    void setColorEnabled(bool use);
    void setMixColorEnabled(bool use);
    void setMixColor(float r, float g, float b, float a);
    void setTextMode();
    
    void setUseBlending(bool use);
    
    // model matrix operations
    
    void pop();
    void push();
    void setToIdentity();
    void scale(float sx, float sy, float sz);
    void translate(float tx, float ty, float tz);
    void translateX(float tx);
    void translateY(float ty);
    void translateZ(float tz);
    void translateTo(float tx, float ty, float tz);
    void rotate(float xDegrees, float yDegrees, float zDegrees);
    void rotateX(float degrees);
    void rotateY(float degrees);
    void rotateZ(float degrees);
    void updateModelMatrix();

private:
    Matrix3D proj;
    int unifProjMatrix = 0;
    Matrix3D view;
    int unifViewMatrix = 0;
    Matrix3DStack model;
    int unifModelMatrix = 0;
    
    Vector3D oldCamera;
    Vector3D camera;
    float oldLengthAngle;
    float lengthAngle;
    float oldWidthAngle;
    float widthAngle;
    
    Vector3D front;
    Vector3D back;
    Vector3D right;
    Vector3D left;
    Vector3D up;
    Vector3D down;   
    
    float fovY = 60;
    float nearClip = 0.1f;
    float farClip = 1000.0f;
    
    int unifUseTexture = 0;
    int unifUseColor = 0;
    int unifUseMixColor = 0;
    int unifMixColorLoc = 0;
};

#endif