#pragma once

#include <memory>
#include <vector>
#include <map>
#include <SDL3/SDL.h>

#include "gfx/types.h"
#include "ui/ui_window.h"
#include "ui/taskbar.h"
#include "ui/launcher.h"
#include "ui/ui_renderer.h"

class GameState;

/* Animated background stuff. */
struct ScrollingText {
  std::string text;
  float x;
  float y_precise; /* sub-pixel animation. */
  float speed;
  int render_y;    /* For pixel-perfect rendering. */
};

class Desktop {
public:
  Desktop(int screen_width, int screen_height, GameState* game_state);
  ~Desktop(void);

  void add_window(std::unique_ptr<UIWindow> window);
  void handle_event(SDL_Event* event, int screen_width, int screen_height);
  void update(float dt, int screen_width, int screen_height);
  void render(const RenderContext& context);

  void register_session(uint32_t session_id, UIWindow* window);
  UIWindow* get_window_by_session_id(uint32_t session_id);
  UIWindow* get_focused_window(void);
  UIWindow* get_window_awaiting_session_id(void);

private:
  void _set_focused_window(UIWindow* window);
  void _render_wallpaper(UIRenderer* ui_renderer);
  void _update_wallpaper(float dt, int screen_width, int screen_height);

  std::vector<std::unique_ptr<UIWindow>> _windows;
  std::unique_ptr<Taskbar>      _taskbar;
  std::unique_ptr<Launcher>     _launcher;
  UIWindow*                     _focused_window;
  UIWindow*                     _window_awaiting_session_id;
  std::map<uint32_t, UIWindow*> _session_windows;
  GameState*                    _game_state;
  std::vector<ScrollingText>    _background_text;
  std::vector<std::string>      _snippets;
  bool                          _launcher_is_open;
};