cpp-game-engine/engine/game_dispatch.hpp

//
//  game_dispatch.hpp
//  gameutils
//
//  Created by Sam Jaffe on 9/2/16.
//

#pragma once

#include <chrono>
#include <memory>
#include <unordered_map>

#include "time.hpp"
#include "engine_fwd.hpp"
#include "events.hpp"
#include "math/math_fwd.hpp"
#include "math/vector.hpp"

namespace engine {
  class game_dispatch {
  public:
    game_dispatch( );
    
    void process_key_event( raw_key_t key, bool press );
    void process_mouse_event( math::vec2 click, bool press );
    
    [[noreturn]] void gameloop( );
    void quit( );
  private:
    void single_frame( tick t ) { }
    tick get_tick( );
    tick next_frame( );
    void cleanup_resources( ) { } // TODO ???
  private:
    math::vec2 screen_size;
    duration minimum_frame_duration;

    using scene_t = std::unique_ptr<scene>;
    std::unordered_map<scene_id_t, scene_t> scenes;
    
    bool running = true;
    timestamp current_timestamp;
    struct current_scene_info {
      current_scene_info( );
      current_scene_info( scene * );
      
      scene * ptr; // weak
      
      std::string current_scene_id; // metadata
      math::vec2 local_size; // metadata
      bool is_mouse_event;
      bool is_keyboard_event;
    } curr_scene;
  };
}