#ifndef ELEMENT_HPP
#define ELEMENT_HPP

#include <cstdint>
#include <memory>
#include <vector>
#include <globals.hpp>

class Window;

enum class Direction {
	UP, DOWN, LEFT, RIGHT
};

struct vec2 {
	int x, y;
	vec2() : x(0), y(0) {}
	vec2(int x, int y) : x(x), y(y) {}
	void set(int _x, int _y) { x = _x; y = _y; }
	auto operator <=> (const vec2&) const = default;
};

class SnakeGame {
public:
	SnakeGame();
	~SnakeGame();
	void run();

private:
	std::unique_ptr<Window> win;
	std::vector<vec2> buf;
	vec2 head { COL / 2, ROW / 2 };
	vec2 fruit { rand() % COL, rand() % ROW };
	vec2 prev_head { head.x, head.y };
	struct {
		Direction dir = Direction::RIGHT;
		uint8_t m_score = 0;
	} state;
	bool process_input();
	void determine_index_zero_pos();
	void move_tail_indicies();
	void add_tail_and_respawn_fruit(std::array<std::array<char, COL>, ROW> view);
	bool exit_summary();
};

#endif // ELEMENT_HPP