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#pragma once

#include "interfaces/cell_helper.hpp"
#include "interfaces/cursor.hpp"
#include "interfaces/game.hpp"
#include "interfaces/generation_tracker.hpp"
#include "interfaces/input.hpp"
#include "interfaces/matrix.hpp"
#include "interfaces/scene.hpp"
#include "interfaces/status_manager.hpp"

#include "engine/data/vector2.hpp"

#include <chrono>
#include <cstddef>
#include <list>
#include <memory>

constexpr auto DEFAULT_MIN_TIME_SINCE_LAST_GEN_MILLIS = 200;

constexpr auto MIN_TIME_SINCE_LAST_GEN_INCREMENT = 50;
constexpr auto MIN_TIME_SINCE_LAST_GEN_DECREMENT = 50;

class Game : public IGame
{
public:
	Game(
		std::shared_ptr<IScene> scene,
		std::shared_ptr<ICursorController> cursor_controller,
		std::shared_ptr<IGenerationTracker> generation_tracker,
		std::shared_ptr<IStatusManager> status_manager,
		std::shared_ptr<IUserInputObserver> user_input_observer,
		std::shared_ptr<ICellHelper> cell_helper) noexcept;

	void on_start() noexcept override;

	void on_update() noexcept override;

	void on_exit() const noexcept override;

private:
	std::shared_ptr<IScene> _scene;
	std::shared_ptr<ICursorController> _cursor_controller;
	std::shared_ptr<IGenerationTracker> _generation_tracker;
	std::shared_ptr<IStatusManager> _status_manager;
	std::shared_ptr<IUserInputObserver> _user_input_observer;
	std::shared_ptr<ICellHelper> _cell_helper;

	using TimePoint = std::chrono::system_clock::time_point;

	TimePoint _last_update_time;
	TimePoint _last_gen_update_time;

	int32_t _min_time_since_last_gen_millis = DEFAULT_MIN_TIME_SINCE_LAST_GEN_MILLIS;

	std::list<Vector2> _living_cell_positions;

	void _move_cursor(const Vector2 &direction) noexcept;

	void _set_space(
		const std::shared_ptr<IMatrix<IScene::MatrixElement>> &matrix,
		const Vector2 &position,
		char character) noexcept;
};