#include <iostream>
#include "UI.h"
#include "Lines.h"
#include "Errors.h"

using namespace std;

#include "vgl.h"
#include "LoadShaders.h"

// globals
Lines starburst_G;
GLuint program_G;

void init(void);
void display(void);
void CheckForErrors(void);

int main(int argc, char * argv[]){ 
    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_RGBA);
    glutInitWindowSize(512, 512);
    glutInitContextVersion(3,0);
    glutInitContextProfile(GLUT_CORE_PROFILE | GLUT_DEBUG);
    //glutInitContextProfile(GLUT_FORWARD_COMPATIBLE | GLUT_DEBUG);

    glutCreateWindow(argv[0]);

    if (glewInit()) {
        cerr<< "Unable to initialize GLEW " << endl;
	return -1;
    }

    init();
    glutDisplayFunc(display);
    glutKeyboardFunc(Keypress);
    glutSpecialFunc(SpecialKeypress);
    glutKeyboardUpFunc(KeyUp);
    glutSpecialUpFunc(SpecialUp);

    KeyHelp();
    glutMainLoop();

    return 0;
}


void init(void) {
    InitErrors();
    glClearColor(1,1,1,1);

    ShaderInfo shaders [] = {
        { GL_VERTEX_SHADER, "vertex.glsl"},
	{ GL_FRAGMENT_SHADER, "fragment.glsl"},
	{ GL_NONE, NULL}
    };

    program_G = LoadShaders(shaders);
    glUseProgram(program_G);

    starburst_G.BindLines(program_G, 100);

    return;
}

void display(void){

    glClear(GL_COLOR_BUFFER_BIT);
    starburst_G.Display();
    glFlush();
    
    return;
}