#include <stdio.h>
#include <stdlib.h>
#include <GLFW/glfw3.h>

GLuint loadShader(const char *path, GLenum shadertype) {
	FILE *file;
	char *src;
	size_t length;
	GLuint shader;

	src = malloc(1000);
	file = fopen(path, "r");
	length = fread(src, 1, 1000, file);
	fclose(file);
	shader = glCreateShader(shadertype);
	glShaderSource(shader, 1, &src, &length);
	free(src);
	glCompileShader(shader);

	return shader;
}

int main(void)
{
    GLFWwindow* window;
	GLuint vs, fs, prog;

    if (!glfwInit())
        return -1;

	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
    window = glfwCreateWindow(640, 480, "Test", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);

	vs = loadShader("vertex.glsl", GL_VERTEX_SHADER);
	printShaderLog(vs);
	prog = glCreateProgram();
	glAttachShader(prog, vs);
	glLinkProgram(prog);
	glUseProgram(prog);

    while (!glfwWindowShouldClose(window))
    {
		glClear(GL_COLOR_BUFFER_BIT);

        glfwSwapBuffers(window);
    }

    glfwTerminate();
    return 0;
}