{-# OPTIONS_GHC -funbox-strict-fields #-}
{-# LANGUAGE NoImplicitPrelude, BangPatterns #-}

module Phladiprelio.General.Datatype where

import GHC.Base
import GHC.List
import Data.Char (isDigit, isSpace)
import Text.Read (readMaybe)
import GHC.Num ((*))
import Data.Maybe (fromMaybe)

data Phladiprelio t a b = Phl {
  inputData :: t a,
  convF :: t a -> t b
}

-- | Universal data, can be used e. g. for phladiprelio-general series of packages.
data BasicLan a = L1 !a | L2 !Double deriving (Eq, Ord)

-- | Specific for Ukranian data type for phladiprelio-ukrainian series of packages.
data BasicUkr = U1 {-# UNPACK #-} !Char | U2 !Double deriving (Eq, Ord)

readBasic0 
 :: Double
 -> (String -> [a])
 -> ([a] -> [Double])
 -> String 
 -> [Double]
readBasic0 = readBasic0G (not . null . filter (not . isSpace))

readBasic = readBasic0 1.0
{-# INLINE readBasic #-}

readBasic0G 
 :: (String -> Bool) -- ^ A special function to check whether the 'String' contains needed information. Must return 'True' for the 'String' that contains the needed for usual processment information, otherwise — 'False'.
 -> Double
 -> (String -> [a])
 -> ([a] -> [Double])
 -> String 
 -> [Double]
readBasic0G p temp fConvA fConvD xs@('_':ys) = (readU2 ws * temp) : readBasic0G p temp fConvA fConvD qs
   where (ws, qs) = span isDigit ys
readBasic0G p temp fConvA fConvD xs@(_:_) 
 | null us = dc
 | otherwise = dc `mappend` ((readU2 ws * d) : readBasic0G p d fConvA fConvD qs)
   where (ts, us) = break (== '_') xs
         dc 
           | null ts || not (p ts) = [temp]
           | otherwise = fConvD . fConvA $ ts
         d = last dc
         vs = dropWhile (== '_') us
         (ws, qs) = span isDigit vs
readBasic0G _ _ _ _ _ = []

readBasicG p = readBasic0G p 1.0
{-# INLINE readBasicG #-}


-- | Is a way to read duration of the additional added time period into the line.
readU2 :: String -> Double
readU2 xs@(y:ys) = fromMaybe 1.0 (readMaybe (y:'.':ys)::Maybe Double)
readU2 _ = 1.0
{-# INLINABLE readU2 #-}