module MEDInstrument where

import qualified MMD0Sample
import qualified InstrHdr
import qualified MMDInstrInfo
import qualified InstrExt

import Human
import Amiga (stringFromBytes)

import qualified Data.List as List

data MEDInstrument = MEDInstrument
  { rep                :: Maybe Int
  , replen             :: Maybe Int
  , midich             :: Maybe Int
  , midipreset         :: Maybe Int
  , svol               :: Maybe Int
  , strans             :: Maybe Int
  , hold               :: Maybe Int
  , decay              :: Maybe Int
  , suppress_midi_off  :: Maybe Int
  , finetune           :: Maybe Int
  , default_pitch      :: Maybe Int
  , instr_flags        :: Maybe Int
  , long_midi_preset   :: Maybe Int
  , output_device      :: Maybe Int
  , long_repeat        :: Maybe Int
  , long_replen        :: Maybe Int
  , name               :: Maybe String
  }
  deriving (Show)

medinstruments ::
  [Maybe InstrHdr.InstrHdr] -> [MMD0Sample.MMD0Sample] ->
  [MMDInstrInfo.MMDInstrInfo] -> [InstrExt.InstrExt] ->
  [MEDInstrument]
medinstruments hdrs samples infos exts =
  let pad xs = map Just xs ++ repeat Nothing
  in  take (maximum [length hdrs, length samples, length infos, length exts]) $
      List.zipWith4 medinstrument
        (hdrs ++ repeat Nothing) (pad samples) (pad infos) (pad exts)

medinstrument ::
  Maybe InstrHdr.InstrHdr -> Maybe MMD0Sample.MMD0Sample ->
  Maybe MMDInstrInfo.MMDInstrInfo -> Maybe InstrExt.InstrExt -> MEDInstrument
medinstrument _h s i e =
  let rep' = fmap (fromIntegral . MMD0Sample.rep) s
      replen' = fmap (fromIntegral . MMD0Sample.replen) s
      midich' = fmap (fromIntegral . MMD0Sample.midich) s
      midipreset' = fmap (fromIntegral . MMD0Sample.midipreset) s
      svol' = fmap (fromIntegral . MMD0Sample.svol) s
      strans' = fmap (fromIntegral . MMD0Sample.strans) s
      hold' = fmap fromIntegral . InstrExt.hold =<< e
      decay' = fmap fromIntegral . InstrExt.decay =<< e
      suppress_midi_off' = fmap fromIntegral . InstrExt.suppress_midi_off =<< e
      finetune' = fmap fromIntegral . InstrExt.finetune =<< e
      default_pitch' = fmap fromIntegral . InstrExt.default_pitch =<< e
      instr_flags' = fmap fromIntegral . InstrExt.instr_flags =<< e
      long_midi_preset' = fmap fromIntegral . InstrExt.long_midi_preset =<< e
      output_device' = fmap fromIntegral . InstrExt.output_device =<< e
      long_repeat' = fmap fromIntegral . InstrExt.long_repeat =<< e
      long_replen' = fmap fromIntegral . InstrExt.long_replen =<< e
      name' = fmap stringFromBytes . MMDInstrInfo.name =<< i
  in MEDInstrument
    rep' replen' midich' midipreset' svol' strans' hold' decay'
    suppress_midi_off' finetune' default_pitch' instr_flags'
    long_midi_preset' output_device' long_repeat' long_replen' name'

instance Human MEDInstrument where
  human i = show i ++ "\n"