#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include "main.h"

int main() {
	if(!glfwInit()) {
		printf("Faild to initalize GLFW\n");
		return -1;
	}
	glfwSetErrorCallback(&glfwError);
	glfwWindowHint(GLFW_SAMPLES, 4);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
	glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
	GLFWwindow *window;
	window = glfwCreateWindow(1920, 1080, "Minecraft-Clone", NULL, NULL);
	if(window == NULL) {
		printf("Failed to open GLFW window.\n");
		glfwTerminate();
		return -1;
	}
	glfwMakeContextCurrent(window);
	if(!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress)) {
		printf("Failed to initialize GLAD\n");
    		return -1;
	}
	glViewport(0, 0, 1920, 1080);
	glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
	glfwSetInputMode(window, GLFW_STICKY_KEYS, GL_TRUE);
	float vertices[] = {
		-0.5f, -0.5f, 0.0f,
		0.5f, -0.5f, 0.0f,
		0.0f,  0.5f, 0.0f
	};
	unsigned int VBO;
	glGenBuffers(1, &VBO);
	glBindBuffer(GL_ARRAY_BUFFER, VBO);
	glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
	while(!glfwWindowShouldClose(window)) {
		glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
		glClear(GL_COLOR_BUFFER_BIT);
		glfwSwapBuffers(window);
		glfwPollEvents();    
	}
	glfwTerminate();
	return 0;
}
void glfwError(int id, const char* description) {
	printf("Glfw Error: %s\n", description);
}

void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
	glViewport(0, 0, width, height);
}
unsigned int parseShader(const char *filePath) {
	FILE *fp = fopen(filePath, "rb");
	size_t lSize;
	char *buffer;
	if(!fp) {
		perror(filePath);
	}
	fseek(fp, 0L, SEEK_END);
	lSize = ftell(fp);
	rewind(fp);
	buffer = malloc(lSize + 1);
	if(!buffer) {
		fclose(fp);
		printf("out of memory");
		exit(1);
	}
	size_t readReturn = fread(buffer, lSize, 1, fp);
	fclose(fp);
	if(readReturn != 1) {
		printf("Can't read Shader");
		exit(1);
	}
	printf("%s", buffer);
	return 0;
}