#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;
	// The following code is a handwritten "ai". Useful for testing and stuff.
	//int8_t _decisions[64] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,-1,-1,-1,-1,-1,-1,-1,-1,-1,1,-1,1,-1,-1,-1,-1,0,0,0,0,-1,-1,0,0,0,1,0,0,-1,-1,0,0};
	int8_t _decisions[64] = {0, 1, 1, -1, 0, 1, 1, -1, 0, -1, 1, -1, -1, 0, 1, -1, -1, 0, 0, 1, -1, -1, 0, 0, -1, 0, 0, -1, 0, -1, 0, -1, -1, 0, 0, -1, -1, 0, 1, -1, -1, 1, 1, -1, -1, 1, -1, 0, 0, 1, 0, 1, -1, -1, 0, 0, 0, -1, 0, 1, 0, -1, 0, -1};
	//int8_t _decisions[64] = {1, 1, 0, 0, 1, 1, -1, -1, 0, -1, 0, -1, -1, 0, -1, 1, 1, -1, 0, 0, 1, -1, 0, 1, 0, -1, 0, -1, 0, 1, 1, 1, -1, 0, 0, 0, -1, -1, -1, 1, -1, -1, 1, 1, -1, 0, 1, 1, 1, 0, 0, -1, -1, 0, -1, 1, 0, 0, 0, -1, 0, -1, 1, 1};
	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);
	bool _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"; }
};