// NOTE: Order matters.
// Including glfw before Vulkan makes glfw not load Vulkan-specific functions
#include <vulkan/vulkan.h>
#include <GLFW/glfw3.h>

#include <string>
#include <vector>

#include <assert.h>
#include <vulkan/vulkan_core.h>

#include "glfw.hpp"

namespace ls {
  // GlfwState
  GlfwState::GlfwState() {
    assert(glfwInit() == GLFW_TRUE);
  };
    
  std::vector<const char*> GlfwState::get_vulkan_exts() {
    std::vector<const char*> res;
    uint32_t glfw_exts_count = 0;
    const char** glfw_exts = glfwGetRequiredInstanceExtensions(&glfw_exts_count);
    for(int i = 0; i < glfw_exts_count; i++) {
      res.push_back(glfw_exts[i]);
    }
    return res;
  }

  // GlfwWindow
  GlfwWindow::GlfwWindow(GlfwState* state, uint32_t x_size, uint32_t y_size, std::string title) {
    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
    glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
    glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
    this->__window = glfwCreateWindow(x_size, y_size, title.c_str(), NULL, NULL);
  };
  
  void GlfwWindow::show() {
    glfwShowWindow(__window);
  }

  void GlfwWindow::set_title(const std::string title) {
    this->__title = title;
    glfwSetWindowTitle(this->__window, this->__title.c_str());
  }

  VkResult GlfwWindow::__make_surface(VkInstance instance, VkSurfaceKHR* surface) {
    return glfwCreateWindowSurface(instance, this->__window, NULL, surface);
  }

  GLFWwindow* GlfwWindow::__get_backing() {
    return __window;
  }
}