module Player.Consume where

import Control.Monad.State.Strict
import Data.Char
import qualified Data.CaseInsensitive as CI
import qualified Data.Map as M

import Types
import Status
import Unicode
import World
import Spell
import Rand
import Player
import Time

isEdible :: Char -> Bool
isEdible c = isPunctuation c || isSymbol c || isLetter c

playerConsume :: M NextStep -> Char -> M NextStep
playerConsume cont = handle
  where
	handle '!' = do
		immediateConsume
		showMessage "Yum! You grow longer.."
		modifyPlayer $ \p -> p { playerLen = succ (playerLen p) }
		cont
	handle '.' = do
		immediateConsume
		roll <- randFrom [1..10 :: Int]
		if roll > 6
			then do
				p' <- teachRandomSpell =<< gets player
				modifyPlayer $ \_ -> p'
			else showMessage "You try to remember a spell, but fail. (i:Inventory)"
		cont
	handle ',' = powerup cont
	handle '\'' = powerup cont
	handle c | isPunctuation c || isSymbol c = do
		showMessage $ "You turn up your nose at eating the " ++ unicodeCharString c
		noswallow
	handle c | isEdible c = do
		m <- gets poisons
		case M.lookup (CI.mk c) m of
			Just poison -> do
				immediateConsume
				poison c cont
			Nothing -> do
				swallowIngredient c cont
	handle _ = noswallow

	noswallow = do
		modifyPlayer $ \p -> p { playerSwallowing = Nothing }
		cont

immediateConsume :: M ()
immediateConsume = do
	modifyPlayer $ \p -> p { playerSwallowing = Nothing }
	p <- gets player
	writeWorld (playerHead p) ' '

swallowIngredient :: Char -> M NextStep -> M NextStep
swallowIngredient c cont = do
	p <- gets player
	unless (spellCaster p) $
		showMessage $ "Swallowing " ++ unicodeCharDesc c
	modifyPlayer $ \_ -> p { playerSwallowing = Just c }
	cont

powerup :: M NextStep -> M NextStep
powerup cont = do
	immediateConsume
	duration <- randFrom [3..10 :: Int]
	showMessage "Yum! You feel energetic!"
	modifyPlayer $ \p -> p { playerEnergized = True }
	delayAction duration cont $ do
		p <- gets player
		when (playerEnergized p && not (playerBerzerk p)) $ do
			showMessage "The burst of energy fades away.."
			modifyPlayer $ \pl -> pl { playerEnergized = False }