#include <fstream>
#include <iostream>
#include <signal.h>
#include <sstream>
#include <stdlib.h>
#include <string>

#include "../src/opengl/IndexBuffer.h"
#include "../src/opengl/Renderer.h"
#include "../src/opengl/Shader.h"
#include "../src/opengl/VertexArray.h"
#include "../src/opengl/VertexBuffer.h"
#include "../src/opengl/utils.h"

const std::string SHADERS_PATH = "src/opengl/res/shaders/Basic.shader";

static void error_callback(int error, const char *description) {
  fputs(description, stderr);
}
static void key_callback(GLFWwindow *window, int key, int scancode, int action,
                         int mods) {
  if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)
    glfwSetWindowShouldClose(window, GL_TRUE);
}

int main(void) {
  GLFWwindow *window;
  glfwSetErrorCallback(error_callback);
  if (!glfwInit())
    exit(EXIT_FAILURE);
  window = glfwCreateWindow(640, 480, "Simple example", NULL, NULL);
  if (!window) {
    glfwTerminate();
    exit(EXIT_FAILURE);
  }

  glfwMakeContextCurrent(window);
  glfwSetKeyCallback(window, key_callback);

  int major, minor, revision;
  glfwGetVersion(&major, &minor, &revision);

  printf("Running against GLFW %i.%i.%i\n", major, minor, revision);
  LOG(glfwGetVersionString());

  while (!glfwWindowShouldClose(window)) {
    float ratio;
    int width, height;
    glfwGetFramebufferSize(window, &width, &height);
    ratio = width / (float)height;
    glViewport(0, 0, width, height);
    glClear(GL_COLOR_BUFFER_BIT);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(-ratio, ratio, -1.f, 1.f, 1.f, -1.f);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glRotatef((float)glfwGetTime() * 50.f, 0.f, 0.f, 1.f);
    glBegin(GL_TRIANGLES);
    glColor3f(1.f, 0.f, 0.f);
    glVertex3f(-0.6f, -0.4f, 0.f);
    glColor3f(0.f, 1.f, 0.f);
    glVertex3f(0.6f, -0.4f, 0.f);
    glColor3f(0.f, 0.f, 1.f);
    glVertex3f(0.f, 0.6f, 0.f);
    glEnd();
    glfwSwapBuffers(window);
    glfwPollEvents();
  }
  glfwDestroyWindow(window);
  glfwTerminate();
  exit(EXIT_SUCCESS);
}