module Dodge.Inventory.Add where

import Control.Lens
import Data.Maybe
import Dodge.Base.You
import Dodge.Combine.Module
import Dodge.Data.World
import Dodge.FloorItem
import Dodge.Inventory.CheckSlots
import qualified IntMapHelp as IM

putItemInInvID :: Int -> Int -> World -> (Maybe Int, World)
putItemInInvID cid flid w = fromMaybe (Nothing, w) $ do
    (i, w') <- tryPutItemInInv cid (_floorItems (_cWorld w) IM.! flid) w
    return (Just i, w')

putItemInInvSlot :: Int -> Item -> IM.IntMap Item -> IM.IntMap Item
putItemInInvSlot = IM.insertWith (const $ itUse . useAmount +~ 1)

-- | Pick up a specific item.
tryPutItemInInv :: Int -> FloorItem -> World -> Maybe (Int, World)
tryPutItemInInv cid flit w = case maybeInvSlot of
    Nothing -> Nothing
    Just i ->
        Just
            ( i
            , w
                & updateItLocation i
                & cWorld . floorItems %~ IM.delete (_flItID flit)
                & cWorld . creatures . ix cid . crInv %~ putItemInInvSlot i it
            )
  where
    it = _flIt flit
    maybeInvSlot = checkInvSlotsYou it w
    updateItLocation invid w' = case _itID it of
        Nothing -> w'
        Just j -> w' & cWorld . itemLocations . ix j .~ InInv cid invid

--{- | Pick up a specific item. -}
--putItemInInv :: Int -> FloorItem -> World -> World
--putItemInInv cid flit w = case maybeInvSlot of
--    Nothing -> w
--    Just i  -> w
--        & updateItLocation i
--        & floorItems %~ IM.delete (_flItID flit)
--        & creatures . ix cid . crInv %~ IM.insertWith (const $ itAmount +~ 1) i it
--  where
--    it = _flIt flit
--    maybeInvSlot = checkInvSlotsYou it w
--    updateItLocation invid w' = case _itID it of
--        Nothing -> w'
--        Just j  -> w' & itemPositions . ix j .~ InInv cid invid
createPutItem :: Item -> World -> (Maybe Int, World)
createPutItem it w =
    uncurry (putItemInInvID (_yourID (_cWorld w))) $
        copyItemToFloorID (_crPos $ you w) (applyModules it) w