let add;

let appleX;

let appleY;

let t;

let gmap;

let head;

let freespaces;

let speed = 250;

​

//fucntions

function clearmap() {

  for (let i = 0; i < 10; i++) {

    for (let j = 0; j < 10; j++) {

      gmap[i][j] = "#";

    }

  }

}

//----------end game

function endGame() {

  clearInterval(t);

  background(0);

  fill("green");

  text("Game Over", 200, 200);

  end = true;

  console.log("game over");

}

​

function setup() {

  createCanvas(400, 400);

  setupGame();

  textAlign(CENTER);

}

function setupGame() {

  key = ''

  snake = [];

  end = false;

  add = false;

  appleX = 1;

  appleY = 2;

  t = setInterval(updateGame, speed);

  gmap = [];

  head = [2, 3];

  for (let i = 0; i < 10; i++) {

    gmap[i] = [];

  }

  clearmap();

  gmap[2][3] = "o";

}

​

function put_objects_in_gmap(){

  gmap[appleX][appleY] = "a";

  gmap[head[0]][head[1]] = "h";

  for (let i = 0; i < snake.length; i++) {

    // console.log(gmap,snake[i])

    gmap[snake[i][0]][snake[i][1]] = "o";

  }

}

​

function eat_apple(){

  freespaces = []

  for (let i=0;i<10;i++){

    for (let j=0;j<10;j++){

      if (gmap[i][j] == '#'){

        freespaces.push([i,j])

      }

    }

  }

​

  //check eaten apple

  if (head[0] == appleX && head[1] == appleY) {

    add = true;

    appleXY = random(freespaces);

    appleX = floor(appleXY[0]);

    appleY = floor(appleXY[1]);

  }

}

​

function collison(){

  for (let i = 0; i < snake.length; i++) {

    // console.log(

    //   snake[i],

    //   snake[i][0] == head[0] && snake[i][0] == head[0],

    //   head

    // );

    if (snake[i][0] == head[0] && snake[i][1] == head[1]) {

      console.log("snake collided");

      endGame();

    }

  }

  if (head[0] == 0) {

      endGame();

  }

  if (head[0] == 9) {

      endGame();

  }

  if (head[1] == 9) {

      endGame();

  }

  if (head[1] == 0) {

      endGame();

  }

}

​

function draw() {}

​

function updateGame() {

  //-----------------------keys---------------------/moving the head/snake

  snake.unshift([head[0], head[1]]);

​

  // chead = head;

  if (key === "ArrowLeft") {

    head[0] -= 1;

  } else if (key === "ArrowRight") {

    head[0] += 1;

  }

  if (key === "ArrowDown") {

    head[1] += 1;

  } else if (key === "ArrowUp") {

    head[1] -= 1;

  }

  //clear game map

  clearmap();

  //set the apple and snake in gmap

  put_objects_in_gmap()

  //check free spaces for apple

  eat_apple()

​

  //draw da squares from gmap

  background(0);

  for (let i = 0; i < 10; i++) {

    for (let j = 0; j < 10; j++) {

      if (gmap[i][j] == "o") {

        fill(0, 255, 0);

        rect(map(i, 0, 10, 0, 400), map(j, 0, 10, 0, 400), 400 / 10, 400 / 10);

      }

      if (gmap[i][j] == "h") {

        fill(255, 255, 255);

        rect(map(i, 0, 10, 0, 400), map(j, 0, 10, 0, 400), 400 / 10, 400 / 10);

        //console.log(i, j)

      }

      if (gmap[i][j] == "a") {

        fill(255, 0, 0);

        rect(map(i, 0, 10, 0, 400), map(j, 0, 10, 0, 400), 400 / 10, 400 / 10);

      }

    }

  }

  if (!add) {

    snake.pop();

  } else {

    add = false;

  }

  //check collison

  collison()

}

​

function mousePressed(){

  end=false

  setupGame();

}

​