math.randomseed(os.time())

-- Create Empty Images For Paddles and Ball
Player = {}
Player[1] = { x = 2, y = 50, speed = 2, score  = 0, img = Image.createEmpty(16, 64) }
Player[2] = { x =  462 , y = 130, speed = 2.4, score = 0, img = Image.createEmpty(16, 64) }

Ball = { x = 240, y = math.random(60,180), xspeed = -3, yspeed = 3, img = Image.createEmpty(8, 8) }

-- Color The Images We Created
Player[1].img:clear(Color.new(255,128,64))
Player[2].img:clear(Color.new(128,0,64))
Ball.img:clear(Color.new(218,218,218))

-- Variables and Tables
Resolution = { width = 480, height = 272 }
gamestate = "paused"
white = Color.new(255,255,255)
whoScored = nil
paddleSpot = math.random(Player[2].img:height() ) 

-- Create Functions
function drawImages()
screen:blit(Player[1].x,Player[1].y,Player[1].img)
screen:blit(Player[2].x,Player[2].y,Player[2].img)
screen:blit(Ball.x,Ball.y,Ball.img)
end

function ballMovement()
if Ball.y <= 0 then
	Ball.yspeed = 3
end
if Ball.y + Ball.img:height() > Resolution.height  then
	Ball.yspeed =   -3
end

Ball.x = Ball.x + Ball.xspeed
Ball.y = Ball.y + Ball.yspeed
end

function paused()
pad = Controls.read()
screen:print(160,145,"Press X To Resume Play",white)
if pad:cross() then
	gamestate = "playing"
end
end

function playerMovement()
pad = Controls.read()

if pad:up() and Player[1].y > 0 then
	Player[1].y = Player[1].y - Player[1].speed
end

if pad:down() and Player[1].y < ( Resolution.height - Player[1].img:height() ) then
	Player[1].y = Player[1].y + Player[1].speed
end

if pad:start() then
gamestate = "paused"
end
end

function checkCollision(obj1,obj2)
if (obj1.x + obj1.img:width() > obj2.x) and (obj1.x < obj2.x + obj2.img:width() ) and (obj1.y + obj1.img:height() > obj2.y)
	and (obj1.y < obj2.y + obj2.img:height() ) then

if (obj1.y > obj2.y) and obj1.y < (obj2.y + obj2.img:height()/2 ) then
	obj1.yspeed = -3
	else
	obj1.yspeed = 3
end

if obj2 == Player[1] then		
	obj1.xspeed = 3
	else
	obj1.xspeed = -3
end

end
end

function checkScore()
if Ball.x < 0 - Ball.img:width() then
	gamestate = "scored"
	Player[2].score = Player[2].score + 1
	whoScored = "Player 2"
	Ball.x = 240
	Ball.y = math.random(80,160)
	Ball.xpeed = 3
end
if Ball.x > Resolution.width then
	gamestate = "scored"
	Player[1].score = Player[1].score + 1
	whoScored = "Player 1"
	Ball.x = 240
	Ball.y = math.random(80,160)
	Ball.xspeed = -3
end
end

function drawScore()
screen:print(10, 5, "Player 1",white)
screen:print(10,15,Player[1].score,white)
screen:print(400, 5, "Player 2",white)
screen:print(400,15,Player[2].score,white)
end

function hasScored()
pad = Controls.read()
if Player[1].score == 10 then
screen:print(160,135, "Player 1 Wins The Game",white)
elseif Player[2].score == 10 then
screen:print(160,135, "Player 2 Wins The Game",white)
else
screen:print(160,135,whoScored .. " Scored 1 Point!",white)
end
screen:print(160,145,"Press X To Resume Play",white)
if pad:cross() then
if Player[1].score == 10 or Player[2].score == 10 then
Player[1].score = 0
Player[2].score = 0
end
gamestate = "playing"
end
end

function cpuAI()
if Ball.xspeed == 3 and Ball.x > 240 then
if Player[2].y + paddleSpot < Ball.y and Player[2].y < ( Resolution.height - Player[2].img:height() ) then
	Player[2].y = Player[2].y + Player[2].speed
	paddleSpot = math.random(Player[2].img:height() ) 
end
if Player[2].y + paddleSpot > Ball.y and Player[2].y > 0 then
	Player[2].y = Player[2].y - Player[2].speed
	paddleSpot = math.random(Player[2].img:height() ) 
end
end
end

while true do
screen:clear()

drawImages()
drawScore()

if gamestate == "paused" then
paused()
end

if gamestate == "scored" then
hasScored()
end

if gamestate == "playing" then
playerMovement()
ballMovement()
cpuAI()
checkCollision(Ball,Player[1])
checkCollision(Ball,Player[2])
checkScore()
end

screen.waitVblankStart()
screen.flip()
end