Strict

Import mojo

Interface IUpdateable
  Method OnUpdate:Int()
End

Interface IRenderable
  Method OnRender:Int()
End

Class AbstractEntity Abstract
  Global cw:Int
  Global ch:Int

  Method New (cw:Int, ch:Int)
    Self.cw = cw;
    Self.ch = ch;
  End

End

Class Ball Extends AbstractEntity Implements IUpdateable, IRenderable
  Field x:Int
  Field y:Int
  Field xs:Int
  Field ys:Int

  Method New ()
    Self.x = 0
    Self.y = 0
    Self.xs = 1
    Self.ys = 1
  End

  Method New (cw:Int, ch:Int)
    Super.New(cw, ch)
    Self.x = 0
    Self.y = 0
    Self.xs = 1
    Self.ys = 1
  End

  Method OnUpdate:Int()
    Self.x += xs
    Self.y += ys
    If Self.x > Self.cw-16 Or Self.x < 0
      Self.xs =- Self.xs
    End
    If Self.y > Self.ch-16 Or Self.y < 0
      Self.ys =- Self.ys
    End
    Return 0
  End

  Method OnRender:Int()
    DrawCircle Self.x, Self.y, 16
    Return 0
  End
End

Class Pad Extends AbstractEntity Implements IUpdateable, IRenderable
  Field x:Int
  Field y:Int
  Field xs:Int

  Method New ()
    Self.x = 0
    Self.y = ch - 16
    Self.xs = 1
  End

  Method New (cw:Int, ch:Int)
    Super.New(cw, ch)
    Self.x = 0
    Self.y = ch - 16
    Self.xs = 1
  End

  Method OnUpdate:Int()
    Self.x += xs
    If Self.x > Self.cw-64 Or Self.x < 0
      Self.xs =- Self.xs
    End
  Return 0
  End

  Method OnRender:Int()
    DrawRect Self.x, Self.y, 64, 8
  Return 0
  End
End

Class game Extends App

  Field ball:Ball
  Field pad:Pad

  Method OnCreate:Int()
    SetUpdateRate(60)
    ball = New Ball(DeviceWidth(), DeviceHeight())
    pad = New Pad()
    Return 0
  End

  Method OnUpdate:Int()
    ball.OnUpdate()
    pad.OnUpdate()
    Return 0
  End

  Method OnRender:Int()
    Cls 0,0,0
    ball.OnRender()
    pad.OnRender()
    Return 0
  End
End 

Function Main:Int()
  New game
  Return 0
End