#include <EGL/egl.h>
#include <GL/gl.h>
#include <iostream>
using namespace std;

static EGLint const attribute_list[] = {
    EGL_RED_SIZE, 1,
    EGL_GREEN_SIZE, 1,
    EGL_BLUE_SIZE, 1,
    EGL_NONE
};


int main(){

	EGLDisplay display;
    EGLConfig config;
    EGLContext context;

    EGLint num_config;

    display = eglGetDisplay(EGL_DEFAULT_DISPLAY);

    if(display == EGL_NO_DISPLAY){
    	cout << "Error detecting display!" << endl;
    	return 0;
    }

    EGLint init = eglInitialize(display, NULL, NULL);

    if(init == EGL_BAD_DISPLAY){
    	cout << "Error! Display is not an EGL display connection." << endl;
    	return 0;
    }

    EGLBoolean cfg = eglChooseConfig(display, attribute_list, &config, 1, &num_config);

    if(cfg == EGL_FALSE){
    	cout << "Error setting configurations!" << endl;
    	return 0;
    }

    context = eglCreateContext(display, config, EGL_NO_CONTEXT, NULL);
    EGLint ctx = eglGetError();

    if(context == EGL_NO_CONTEXT){
    	cout << "Error! Creation of the context failed." << endl;
    }

    if(ctx == EGL_BAD_MATCH){
    	cout << "Error! The current rendering API is EGL_NONE or the server context state for share_context exists in an address space which cannot be shared with the newly created context!" << endl;
    	return 0;
    }else if(ctx == EGL_BAD_DISPLAY){
    	cout << "Error! Display is not an EGL display connection." << endl;
    	return 0;
    }else if(ctx == EGL_NOT_INITIALIZED){
    	cout << "Error! Display has not been initialized." << endl;
    	return 0;
    }else if(ctx == EGL_BAD_CONFIG){
    	cout << "Error! Config is not an EGL frame buffer configuration, or does not support the current rendering API." << endl;
    	return 0;
    }else if(ctx == EGL_BAD_CONTEXT){
    	cout << "Error! Share_context is not an EGL rendering context!" << endl;
    	return 0;
    }else if(ctx == EGL_BAD_ATTRIBUTE){
    	cout << "Error! Attrib_list contains an invalid context attribute or if an attribute is not recognized or out of range." << endl;
    	return 0;
    }else if(ctx == EGL_BAD_ALLOC){
    	cout << "Error! There are not enough resources to allocate the new context." << endl;
    	return 0;
    }

    EGLBoolean cpdy = eglMakeCurrent(display, NULL, NULL, context);

 	if(cpdy == EGL_FALSE){
 		cout << "Fail make current" << endl;
 		return 0;
 	}

    cout << glGetString(GL_VERSION) << endl;

    return 0;
}