Ball = {}


function Ball:load()
  self.x = love.graphics.getWidth() / 2
  self.y = love.graphics.getHeight() / 2
  self.width = 20
  self.height = 20
  self.speed = 200
  self.xVel = -self.speed
  self.yVel = 0
end


function Ball:update(dt)
  self:move(dt)
  self:collide()
end


function Ball:collide()
  if checkCollision(self, Player) then
     self.xVel = self.speed
     local middleBall = self.y + self.height / 2
     local middlePlayer = Player.y + Player.height / 2
     local collisionPosition = middleBall - middlePlayer
     self.yVel = collisionPosition * 5
  end


  if checkCollision(self, AI) then
     self.xVel = -self.speed
     local middleBall = self.y + self.height / 2
     local middleAI = AI.y + AI.height / 2
     local collisionPosition = middleBall - middleAI
     self.yVel = collisionPosition * 5
  end



  if self.y < 0 then 
     self.y = 0
     self.yVel = -self.yVel
  elseif self.y + self.height > love.graphics.getHeight() then
     self.y = love.graphics.getHeight() - self.height
     self.yVel = -self.yVel
  end
  
  if self.x < 0 then
     self.x = love.graphics.getWidth() / 2 - self.width / 2
     self.y = love.graphics.getHeight() / 2 - self.height / 2
     self.yVel = 0
     self.xVel = self.speed
  end

  if self.x + self.width > love.graphics.getWidth() then
     self.x = love.graphics.getWidth() / 2 - self.width / 2
     self.y = love.graphics.getHeight() / 2 - self.height / 2
     self.yVel = 0
     self.xVel = -self.speed
  end
end


function Ball:move(dt)
  self.x = self.x + self.xVel * dt
  self.y = self.y + self.yVel * dt
end

function Ball:draw()
  love.graphics.rectangle("fill", self.x, self.y, self.width, self.height) 
end