start implementi difficulty level, but needs some balancements

src/paddle.cpp

@@ -1,13 +1,13 @@
 #include "paddle.h"
 
 void Paddle::move_pad_up() {
-  if (_position > 0) {
-    _position -= 1;
+  if (_pos_y > 0) {
+    _pos_y -= 1;
   }
 }
 void Paddle::move_pad_down() {
-  if (_position + _height < MATRIX_HEIGHT) {
-    _position += 1;
+  if (_pos_y + _height < MATRIX_HEIGHT) {
+    _pos_y += 1;
   }
 }
 
@@ -15,7 +15,7 @@ void run_paddle() {
 }
 
 uint8_t Paddle::get_position() {
-  return _position;
+  return _pos_y;
 }
 
 bool Paddle::is_human() {
@@ -43,6 +43,9 @@ bool Paddle::check_pad_movement(Ball &ball) {
   // redefine me
   return false;
 }
+uint8_t Paddle::get_skills() {
+  return 0;
+}
 
 bool HumanPaddle::check_pad_movement() {
   bool need_refresh= false;
@@ -58,14 +61,41 @@ bool HumanPaddle::check_pad_movement() {
 }
 
 bool BotPaddle::check_pad_movement(Ball &ball) {
-  uint8_t y= ball.get_y();
+  uint8_t ball_y= ball.get_y();
+  int8_t ball_dir= ball.get_direction_x();
+
+  // ball is moving left and pad is on right, do not move
+  if (ball_dir < 0 && _pos_x > MATRIX_WIDTH / 2) return false;
+  // ball is moving right and pad is on left, do not move
+  else if (ball_dir > 0 && _pos_x < MATRIX_WIDTH / 2) return false;
+  
+  uint8_t ball_x= ball.get_x();
+  int8_t ball_distance= ball_x - _pos_x;
+  if (ball_distance < 0) ball_distance *= -1;
+  switch (this -> get_skills()) {
+    case 1:
+      if (ball_distance > MATRIX_WIDTH / 2 - 2) return false;
+      break;
+    case 2:
+      if (ball_distance > MATRIX_WIDTH / 2 - 1) return false;
+      break;
+    case 3:
+      if (ball_distance > MATRIX_WIDTH / 2) return false;
+      break;
+  }
+
   // TODO BotPaddle movement logics
   // on higher difficult level i could also check the ball direction
   // or at lover difficulty level i could also check the distance from the pad and move only when the ball si near
-  for (uint8_t _py= _position; _py < _position+PADDLE_LENGTH; _py++) {
+
+  for (uint8_t py= _pos_y; py < _pos_y+PADDLE_LENGTH; py++) {
     // don't move if ball is already centered to the pad
-    if (_py == y) continue;
-    else if (_position - y >= 0) this -> move_pad_up();
+    if (py == ball_y) continue;
+    else if (_pos_y - ball_y >= 0) this -> move_pad_up();
     else this -> move_pad_down();
   }
 }
+
+uint8_t BotPaddle::get_skills() {
+  return _skills;
+}