export function updatePlayerPosition(player, platforms) {
  let elevationGain = 0;
  // Controls
  player.vel.x = 0;
  if (keyIsDown(LEFT_ARROW)) {
    player.vel.x = -5;
  }
  if (keyIsDown(RIGHT_ARROW)) {
    player.vel.x = 5;
  }

   // Wrap horizontally around canvas edges
  if (player.x > width) {
    player.x = 0;
  } else if (player.x < 0) {
    player.x = width;
  }

  // Jumping thrue platforms
  for (let plat of platforms) {
    if (player.vel.y <= 0 && player.y > plat.y) {
      plat.collider = 'none';
    } else {
      plat.collider = 'static';
    }
  }

  // Automatic jumping
  if(player.vel.y >= 0) {
    for (let plat of platforms) {
      if (player.colliding(plat)) {
        player.vel.y = -7.5;
        
        if (player.elevation < plat.elevation) {
          elevationGain = plat.elevation - player.elevation;
          player.elevation = plat.elevation;
        }
        break;
      }
    }
  }
 
  return elevationGain;
}