#if GRAPHICS_OPENGL
#include <GL/gl.h>

#pragma comment(lib, "opengl32")
#pragma comment(lib, "gdi32")
#endif

// #if GRAPHICS_DIRECTX11

// enum class Graphics_API: s32 {
//   DirectX_11 = 0,
//   OpenGL_3   = 1,
// };

struct Shader {};
struct Texture {};
struct Vertex {
  Vec2 position;
  Vec4 color_scale;
  Vec2 uv0;
  // The following values are for rendering rounded rectangles
  // It's OK to put these here because for basic rendering the performance is "good enough"
  Vec2 rect_center;
  Vec2 rect_size;
  f32  rect_corner_radius;
  f32  rect_edge_softness = 1.0;
};

constexpr s64 starting_vertex_count = 2048;

struct Graphics {
  // Graphics_API api = Graphics_API::OpenGL_3;
  
  Window_Info current_window;
  Shader* current_shader;
  Texture* texture_render_target;
  
  Array<Vertex> vertices; // just init to max count.
};

void graphics_thread_destroy () {
  Thread_Context* context = thread_context(); // maybe turn this into a :macro?

  array_free(context->graphics->vertices);
  internal_free(context->graphics);
}

void graphics_reset () {
  Thread_Context* context = thread_context(); // maybe turn this into a :macro?
  
  context->graphics->current_shader = nullptr;
}

Graphics* graphics_thread_init () {
  Thread_Context* context = thread_context();
  
  Assert(context != nullptr);
  
  push_allocator(GPAllocator());
  
  if (context->graphics == nullptr) {
    context->graphics = New<Graphics>(true);
    array_reserve(context->graphics->vertices, starting_vertex_count);
  }
  
  return context->graphics;
}

void graphics_flush_buffer () {
  //
}

void graphics_update_current_window (Graphics* graphics) {
  // graphics->current_window
  
}

void graphics_set_render_target (Window_Info window_info) {
  Graphics* graphics = graphics_thread_init();
  
  graphics->current_shader = nullptr;
  graphics->texture_render_target = nullptr;
  
  graphics->current_window = window_info;
  // #TODO: graphics_update_window ::
  
}