module Magic where

-------------------------------------------------------------------------------
-- Mana
-------------------------------------------------------------------------------

data Color = Colorless
    | Black
    | White
    | Red
    | Blue
    | Green
    deriving (Show, Eq)

data Mana = Mana Int Color
    deriving (Show, Eq)

data Cost = Cost [Mana]
    deriving (Show, Eq)

class ManaCost a where
    converted :: a -> Int

instance ManaCost Cost where
    converted (Cost []) = 0
    converted (Cost cost) = (foldl (\t (Mana x _) -> t + x) 0) cost

color :: Color -> Cost -> Int
color c (Cost cost) = converted (Cost (filter (\(Mana _ col) -> col == c) cost))

pretty :: Cost -> String
pretty c = concat ( [show (color Colorless c)
    , replicate (color Black c) 'B'
    , replicate (color White c) 'W'
    , replicate (color Red   c) 'R'
    , replicate (color Blue  c) 'U'
    , replicate (color Green c) 'G'
    ])

-------------------------------------------------------------------------------
-- Cards
-------------------------------------------------------------------------------

data Rarity = Land
    | Common
    | Uncommon
    | Rare
    | Mythic
    | Special
    deriving (Show, Eq)

data Card = Card Rarity String Cost
    deriving (Show, Eq)

instance ManaCost Card where
    converted (Card _ _ cost) = converted cost

data Deck = Deck [Card]

curve :: Deck -> [(Int, Int)]
curve (Deck cards) = do
    let largest = maximum (map converted cards)
    map (\x -> (x, length (filter (\(Card rarity _ cost) -> rarity /= Land && converted cost == x) cards))) [0..largest]

deck = Deck ((replicate 13 (Card Land "Swamp" (Cost []))) ++ (replicate 13 (Card Land "Plains" (Cost [])))
    ++ replicate 4 (Card Mythic "Jace Beleren" (Cost [Mana 1 Colorless, Mana 2 Blue])))