module Sound.MED.Raw.MMD1 where

import qualified Sound.MED.Raw.MMD0Song as MMD0Song
import Sound.MED.Raw.MMD0Song(MMD0Song)
import qualified Sound.MED.Raw.MMD1Block as MMD1Block
import Sound.MED.Raw.MMD1Block(MMD1Block)
import qualified Sound.MED.Raw.InstrHdr as InstrHdr
import Sound.MED.Raw.InstrHdr(InstrHdr)
import qualified Sound.MED.Raw.MMD0exp as MMD0exp
import Sound.MED.Raw.MMD0exp(MMD0exp)
import Sound.MED.Basic.Amiga

data MMD1 = MMD1
  { id          :: ULONG
  , modlen      :: ULONG
  , song        :: MMD0Song
  , psecnum     :: UWORD
  , pseq        :: UWORD
  , blockarr    :: [ MMD1Block ]
  , mmdflags    :: UBYTE
  , reserved1   :: UBYTE
  , reserved2   :: UBYTE
  , reserved3   :: UBYTE
  , smplarr     :: [ Maybe InstrHdr ]
  , reserved4   :: ULONG
  , expdata     :: Maybe MMD0exp
  , reserved5   :: ULONG
  , pstate      :: UWORD
  , pblock      :: UWORD
  , pline       :: UWORD
  , pseqnum     :: UWORD
  , actplayline :: WORD
  , counter     :: UBYTE
  , extra_songs :: UBYTE
  }
  deriving (Show)

peek :: MEM -> PTR -> IO MMD1
peek m p = do
  id'          <- peekULONG m (p + 0)
  modlen'      <- peekULONG m (p + 4)
  song''       <- peekPTR   m (p + 8)
  song'        <- MMD0Song.peek m song''
  psecnum'     <- peekUWORD m (p + 12)
  pseq'        <- peekUWORD m (p + 14)
  blockarr'''  <- peekPTR   m (p + 16)
  blockarr''   <- mapM (peekPTR m) $ pointerRangeGen blockarr''' 4 (MMD0Song.numblocks song')
  blockarr'    <- mapM (MMD1Block.peek m) blockarr''
  mmdflags'    <- peekUBYTE m (p + 20)
  reserved1'   <- peekUBYTE m (p + 21)
  reserved2'   <- peekUBYTE m (p + 22)
  reserved3'   <- peekUBYTE m (p + 23)
  smplarr'''   <- peekPTR   m (p + 24)
  smplarr''    <- mapM (peekPTR m) $ pointerRangeGenCheck smplarr''' 4 (MMD0Song.numsamples song')
  smplarr'     <- mapM (InstrHdr.peek m $?) smplarr''
  reserved4'   <- peekULONG m (p + 28)
  expdata'''   <- peekPTR   m (p + 32)
  expdata'     <- MMD0exp.peek m $? expdata'''
  reserved5'   <- peekULONG m (p + 36)
  pstate'      <- peekUWORD m (p + 40)
  pblock'      <- peekUWORD m (p + 42)
  pline'       <- peekUWORD m (p + 44)
  pseqnum'     <- peekUWORD m (p + 46)
  actplayline' <- peekWORD  m (p + 48)
  counter'     <- peekUBYTE m (p + 50)
  extra_songs' <- peekUBYTE m (p + 51)
  return $ MMD1
    id' modlen' song' psecnum' pseq' blockarr' mmdflags'
    reserved1' reserved2' reserved3' smplarr' reserved4'
    expdata' reserved5' pstate' pblock' pline' pseqnum'
    actplayline' counter' extra_songs'