module Cards where

data Suit = Hearts
          |Diamonds
          |Spades
          |Clubs
    deriving (Eq, Enum)

dumbLookup :: (Eq a) => a -> [(a, b)] -> b
dumbLookup _ [] = error "derp"
dumbLookup z ((x,y):xs) | x == z = y
                        | otherwise = dumbLookup z xs

instance Show Suit = dumbLookup x [(Hearts, "H"), (Diamonds, "D"), (Spades, "S"), (Clubs, "C")]

data Rank = Two | Three | Four | Five | Six | Seven | Eight | Nine | Ten | Jack | Queen | King | Ace
    deriving (Eq, Ord, Enum)

instance Show Rank = -- see above, same trick but different values
data Card = Card {rank :: Rank, suit :: Suit}

instance Show Card where show card = show (rank card) ++ show (suit card)
instance Ord Card where compare card1 card2 = compare (rank card1) (rank card2)
instance Eq Card where card1 == card2 = rank card1 == rank card2