#include <glad/glad.h>
#include <GLFW/glfw3.h>

#include <locale.h>
#include <stdio.h>
#include <stdlib.h>

static void char_callback(GLFWwindow* window, unsigned int ch)
{
    printf ("Char: \"%lc\"\n", (int) ch);
}

static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
{
    if (action != GLFW_PRESS)
        return;

    switch (key)
    {
        case GLFW_KEY_ESCAPE:
            glfwSetWindowShouldClose(window, GLFW_TRUE);
            break;
    }
}

int main(int argc, char** argv)
{
    setlocale(LC_ALL, "");

    GLFWwindow* window;

    if (!glfwInit())
    {
        fprintf(stderr, "Failed to initialize GLFW\n");
        exit(EXIT_FAILURE);
    }

    window = glfwCreateWindow(200, 200, "Window Icon", NULL, NULL);
    if (!window)
    {
        glfwTerminate();

        fprintf(stderr, "Failed to open GLFW window\n");
        exit(EXIT_FAILURE);
    }

    glfwMakeContextCurrent(window);

    glfwSetKeyCallback(window, key_callback);
    glfwSetCharCallback(window, char_callback);

    while (!glfwWindowShouldClose(window))
    {
        glClear(GL_COLOR_BUFFER_BIT);
        glfwSwapBuffers(window);
        glfwWaitEvents();
    }

    glfwDestroyWindow(window);
    glfwTerminate();
    exit(EXIT_SUCCESS);
}