-- |
-- Module      :  Data.List.InnToOut.Unsafe
-- Copyright   :  (c) OleksandrZhabenko 2019
-- License     :  MIT
--
-- Maintainer  :  olexandr543@yahoo.com
--
-- Various additional operations on lists that have additional intermediate Monads inside.
--

module Data.List.InnToOut.Unsafe 
  (
    -- * Operations to obtain intermediate Monads. Like the 'UnsafePerformIO' function they can have unpredictable behaviour. Use them ONLY if you surely know what you are doing.
       mapI22M
       , mapI2M2
       , mapI2M2M   
       , mapI12M
       , mapI2M1
  ) where

-- | Variant of the function 'Data.List.InnToOut.mapI22' in which the second intermediate result @c@ is in the @Monad m@.
mapI22M :: Monad m => (a -> Bool) -> (a -> b) -> (b -> d) -> (a -> m c) -> (m c -> d) -> [a] -> [d]
mapI22M p f1 g f2 h = map (\x -> if p x then g (f1 x) else h (f2 x)) 
{-#INLINE mapI22M#-}

-- | Variant of the function 'Data.List.InnToOut.mapI22' in which the first intermediate result @b@ is in the @Monad m@.
mapI2M2 :: Monad m => (a -> Bool) -> (a -> m b) -> (m b -> d) -> (a -> c) -> (c -> d) -> [a] -> [d]
mapI2M2 p f1 g f2 h = map (\x -> if p x then g (f1 x) else h (f2 x)) 
{-#INLINE mapI2M2#-}

-- | Variant of the function 'Data.List.InnToOut.mapI22' in which both the intermediate results @b@ and @c@ are in the Monads.
mapI2M2M :: (Monad m0, Monad m) => (a -> Bool) -> (a -> m0 b) -> (m0 b -> d) -> (a -> m c) -> (m c -> d) -> [a] -> [d]
mapI2M2M p f1 g f2 h = map (\x -> if p x then g (f1 x) else h (f2 x)) 
{-#INLINE mapI2M2M#-}

-- | Variant of the function 'Data.List.InnToOut.mapI12' in which the second intermediate result @b@ is in the @Monad m@.
mapI12M :: Monad m => (a -> Bool) -> (a -> c) -> (a -> m b) -> (m b -> c) -> [a] -> [c]
mapI12M p f g h = map (\x -> if p x then f x else h (g x)) 
{-#INLINE mapI12M#-}

-- | Variant of the function 'Data.List.InnToOut.mapI21' in which the first intermediate result @b@ is in the @Monad m@.
mapI2M1 :: Monad m => (a -> Bool) -> (a -> m b) -> (m b -> c) -> (a -> c) -> [a] -> [c]
mapI2M1 p f g h = map (\x -> if p x then g (f x) else h x) 
{-#INLINE mapI2M1#-}