module Cookbook.Ingredients.Lists.Stats where
import qualified Cookbook.Ingredients.Lists.Access as Ac
import qualified Cookbook.Ingredients.Lists.Modify as Md
import qualified Cookbook.Ingredients.Tupples.Assemble as As
import qualified Cookbook.Recipes.Sanitize as Sn
import qualified Cookbook.Recipes.Math as Ma
frequency :: (Eq a) => [a] -> [(a,Int)]
frequency x = let y = map (\c -> (c,Ac.count x c)) x in As.rmDb y
mostFrequent :: (Eq a) => [a] -> Int -> [a]
mostFrequent x c = take c $ Md.rev (As.assemble $ frequency x)
wordscore :: (Eq a) => [a] -> [a] -> Double
wordscore a b = (freqScore a b 0.1) + (0.1 / realToFrac (if diffLen == 0 then 1 else diffLen))
where diffLen = (abs $(length a) (length b))
freqScore :: (Eq a) => [a] -> [a] -> Double
freqScore a b = (rawFreq / (fromIntegral diffLen))
where diffLen = fromIntegral (if (length (frequency a)) < (length (frequency b)) then length (frequency a) else length (frequency b))
rawFreq = fromIntegral ((sum $ (map (\e -> if e `elem` d then 1 else 0) c)))
(c:d:_) = map ((flip mostFrequent) diffLen) [a,b]