/**
 * @file snake.h
 * @author techniccontroller (mail[at]techniccontroller.com)
 * @brief Class declaration of snake game
 * @version 0.1
 * @date 2022-03-05
 *
 * @copyright Copyright (c) 2022
 *
 * main code from https://elektro.turanis.de/html/prj099/index.html
 *
 */
#ifndef snake_h
#define snake_h

#include <Arduino.h>
#include "led_matrix.h"
#include "udp_logger.h"

#ifdef DEBOUNCE_TIME
#undef DEBOUNCE_TIME
#endif
#define DEBOUNCE_TIME 250 // in ms

#define X_MAX 11
#define Y_MAX 11

#ifdef GAME_DELAY
#undef GAME_DELAY
#endif
#define GAME_DELAY 400 // in ms

#define LED_TYPE_SNAKE 1
#ifdef LED_TYPE_OFF
#undef LED_TYPE_OFF
#endif
#define LED_TYPE_OFF 2
#define LED_TYPE_FOOD 3
#define LED_TYPE_BLOOD 4

#define DIRECTION_NONE 0
#define DIRECTION_UP 1
#define DIRECTION_DOWN 2
#define DIRECTION_LEFT 3
#define DIRECTION_RIGHT 4

#define GAME_STATE_RUNNING 1
#define GAME_STATE_END 2
#define GAME_STATE_INIT 3

#define MAX_TAIL_LENGTH (X_MAX * Y_MAX)
#define MIN_TAIL_LENGTH 3

class Snake
{

    struct Coords
    {
        int x;
        int y;
    };

public:
    Snake();
    Snake(LEDMatrix * matrix, UDPLogger * logger);
    void loopCycle();
    void initGame();
    void ctrlUp();
    void ctrlDown();
    void ctrlLeft();
    void ctrlRight();

private:
    LEDMatrix * _ledmatrix;
    UDPLogger * _logger;
    uint8_t _userDirection = 0;
    uint8_t _gameState = 0;
    Coords _head = {0, 0};
    Coords _tail[MAX_TAIL_LENGTH];
    Coords _food = {0, 0};
    unsigned long _lastDrawUpdate = 0;
    unsigned long _lastButtonClick = 0;
    unsigned int _wormLength = 0;

    void resetLEDs();
    void updateGame();
    void endGame();
    void updateTail();
    void updateFood();
    bool isCollision();
    void toggleLed(uint8_t x, uint8_t y, uint8_t type);
};

#endif