#pragma once

#include "Effect.h"
#include "prototypes.h"

#define SNAKE_DIR_NORTH 0
#define SNAKE_DIR_EAST  1
#define SNAKE_DIR_SOUTH 2
#define SNAKE_DIR_WEST  3

class SnakeEffect : public Effect {
private:
	Coords _pos;
	Coords _apple;
	int8_t _dir = SNAKE_DIR_NORTH;
	uint8_t* _map;
	uint16_t _pixels;
	uint8_t _length;
	unsigned long _last_apple_at;
	unsigned long _last_move_at;
	// 204.6 points, length  35,  58% stopped,  42% dead
	float _weights[18] = {0.8613356309729567, 0.1010670216231977, -0.03801953620401166, 0.7556556498067926, -0.9925124063206012, 0.6375227768823608, 0.7216340201735381, 0.5557451907997892, 0.03496949604344035, 0.7238725631217913, 0.9070987343528141, 0.6518810721526125, -0.17322587217593544, -0.7726195238221361, 0.8044226332955624, 0.8434782354002677, 0.8508760698750302, 0.47735675603010397};
	uint16_t _xy2i(uint8_t x, uint8_t y);
	uint16_t _xy2i(Coords c);
	Coords _i2xy(uint16_t i);
	Coords _new_pos(uint8_t dir);
	uint8_t _dying = 0;
	bool _is_free(uint8_t dir);
	uint8_t _free_spaces(uint8_t dir);
	uint8_t _to_apple(uint8_t dir);
	void _place_apple();
	void _init();
	void _decide();
	int8_t _manual_decision();
	void _move();
	void _draw();
public:
	SnakeEffect();
	~SnakeEffect();
	void loop(uint16_t ms);
	boolean can_be_shown_with_clock();
	String get_name() override { return "snake"; }
};