module MMD1 where

import Amiga
import qualified MMD0Song
import MMD0Song(MMD0Song)
import qualified MMD1Block
import MMD1Block(MMD1Block)
import qualified InstrHdr
import InstrHdr(InstrHdr)
import qualified MMD0exp
import MMD0exp(MMD0exp)

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'