module Csound.Typed.Plugins.Iain(
    pitchShifterDelay,
    fxAnalogDelay, fxDistortion, fxEnvelopeFollower, fxFlanger, fxFreqShifter, fxLoFi,
    fxPanTrem, fxMonoTrem, fxPhaser, fxPitchShifter, fxReverse, fxRingModulator, fxChorus2, fxPingPong
) where

import Csound.Dynamic

import Csound.Typed.Types
import Csound.Typed.GlobalState
import qualified Csound.Typed.GlobalState.Elements as E(pitchShifterDelayPlugin,
    analogDelayPlugin, distortionPlugin, envelopeFolollowerPlugin, flangerPlugin, freqShifterPlugin,
    loFiPlugin, panTremPlugin, monoTremPlugin, phaserPlugin, pitchShifterPlugin, reversePlugin, ringModulatorPlugin, stChorusPlugin, stereoPingPongDelayPlugin)

pitchShifterDelay :: D -> (Sig, Sig) -> Sig -> Sig -> Sig -> Sig
pitchShifterDelay imaxdlt (fb1, fb2) kdel ktrans ain = csdPitchShifterDelay ain ktrans kdel fb1 fb2 imaxdlt

-- | PitchShifterDelay
-- ; ----------------
-- ; A pitch shifter effect that employs delay lines
-- ;
-- ; aout  PitchShifterDelay  ain,ktrans,kdlt,kFB1,kFB2,imaxdlt
--;
--; Initialisation
--; --------------
--; imaxdlt --  maximum delay time (kdlt should not exceed this value)
--;
--; Performance
--; -----------
--; ain     --  input audio to be pitch shifted
--; ktrans  --  pitch transposition (in semitones)
--; kdlt    --  delay time employed by the pitch shifter effect (should be within the range ksmps/sr and imaxdlt)
--; kFB1    --  feedback using method 1 (output from delay taps are fed back directly into their own buffers before enveloping and mixing)
--; kFB2    --  feedback using method 2 (enveloped and mixed output from both taps is fed back into both buffers)
--
-- opcode  PitchShifterDelay,a,akkkki
csdPitchShifterDelay :: Sig -> Sig -> Sig -> Sig -> Sig -> D -> Sig
csdPitchShifterDelay ain ktrans kdlt kFB1 kFB2 imaxdlt = fromGE $ do
    addUdoPlugin E.pitchShifterDelayPlugin
    f <$> toGE ain <*> toGE ktrans <*> toGE kdlt <*> toGE kFB1 <*> toGE kFB2 <*> toGE imaxdlt
    where f ain' ktrans' kdlt' kFB1' kFB2' imaxdlt' = opcs "PitchShifterDelay" [(Ar, [Ar, Kr, Kr, Kr, Kr, Ir])] [ain', ktrans', kdlt', kFB1', kFB2', imaxdlt']

--------------------------------------------------------
-- multi fx

fxAnalogDelay :: Sig -> Sig -> Sig -> Sig -> Sig -> Sig
fxAnalogDelay kmix ktime kfback ktone ain = csdAnalogDelay ain kmix ktime kfback ktone

-- ; AnalogDelay
-- ; ----------------
-- ; A analog style delay with signal degradation and saturation options
-- ;
-- ; aout  AnalogDelay  ain,kmix,ktime,kfback,ktone
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to which the flanging effect will be applied
-- ; kmix   --  dry / wet mix of the output signal (range 0 to 1)
-- ; ktime  --  delay time of the effect in seconds
-- ; kfback --  control of the amount of output signal fed back into the input of the effect (exceeding 1 (100%) is possible and will result in saturation clipping effects)
-- ; ktone  --  control of the amount of output signal fed back into the input of the effect (range 0 to 1)
csdAnalogDelay :: Sig -> Sig -> Sig -> Sig -> Sig -> Sig
csdAnalogDelay ain kmix ktime kfback ktone = fromGE $ do
    addUdoPlugin E.analogDelayPlugin
    f <$> toGE ain <*> toGE kmix <*> toGE ktime <*> toGE kfback <*> toGE ktone
    where f ain' kmix' ktime' kfback' ktone' = opcs "AnalogDelay" [(Ar,[Ar,Kr,Kr,Kr,Kr])] [ain', kmix', ktime', kfback', ktone']

fxDistortion :: Sig -> Sig -> Sig -> Sig -> Sig
fxDistortion klevel kdrive ktone ain = csdDistortion ain klevel kdrive ktone

-- ; Distortion
-- ; ----------------
-- ; A distortion effect offering stomp-box-like controls
-- ;
-- ; aout  Distortion  ain,klevel,kdrive,ktone
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be distorted
-- ; klevel --  output level of the effect (range: 0 to 1)
-- ; kdrive --  intensity of the distortion effect (range: 0 to 1)
-- ; ktone  --  tone of a lowpass filter (range: 0 to 1)
csdDistortion :: Sig -> Sig -> Sig -> Sig -> Sig
csdDistortion ain klevel kdrive ktone = fromGE $ do
    addUdoPlugin E.distortionPlugin
    f <$> toGE ain <*> toGE klevel <*> toGE kdrive <*> toGE ktone
    where f ain' klevel' kdrive' ktone' = opcs "Distortion" [(Ar,[Ar,Kr,Kr,Kr])] [ain', klevel', kdrive', ktone']


fxEnvelopeFollower :: Sig -> Sig -> Sig -> Sig -> Sig
fxEnvelopeFollower ksens kfreq kres ain = csdEnvelopeFollower ain ksens kfreq kres

-- ; EnvelopeFollower
-- ; ----------------
-- ; A dynamic envelope following resonant lowpass filter
-- ;
-- ; aout  EnvelopeFollower  ain,ksens,kfreq,kres
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be filtered
-- ; ksens  --  sensitivity of the envelope follower (suggested range: 0 to 1)
-- ; kfreq  --  base frequency of the filter before modulation by the input dynamics (range: 0 to 1)
-- ; kres   --  resonance of the lowpass filter (suggested range: 0 to 0.99)
csdEnvelopeFollower :: Sig -> Sig -> Sig -> Sig -> Sig
csdEnvelopeFollower ain ksens kfreq kres = fromGE $ do
    addUdoPlugin E.envelopeFolollowerPlugin
    f <$> toGE ain <*> toGE ksens <*> toGE kfreq <*> toGE kres
    where f ain' ksens' kfreq' kres' = opcs "EnvelopeFollower" [(Ar,[Ar,Kr,Kr,Kr])] [ain', ksens', kfreq', kres']

-- ; Flanger
-- ; ----------------
-- ; A flanger effect following the typical design of a so called 'stomp box'
-- ;
-- ; aout  Flanger  ain,krate,kdepth,kdelay,kfback
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to which the flanging effect will be applied
-- ; krate  --  rate control of the lfo of the effect *NOT IN HERTZ* (range 0 to 1)
-- ; kdepth --  depth of the lfo of the effect (range 0 to 1)
-- ; kdelay --  static delay offset of the flanging effect (range 0 to 1)
-- ; kfback --  feedback and therefore intensity of the effect (range 0 to 1)
fxFlanger :: Sig -> Sig -> Sig -> Sig -> Sig -> Sig
fxFlanger krate kdepth kdelay kfback ain = fromGE $ do
    addUdoPlugin E.flangerPlugin
    f <$> toGE ain <*> toGE krate <*> toGE kdepth <*> toGE kdelay <*> toGE kfback
    where f ain' krate' kdepth' kdelay' kfback' = opcs "Flanger" [(Ar,[Ar,Kr,Kr,Kr,Kr])] [ain', krate', kdepth', kdelay', kfback']


-- ; FreqShifter
-- ; ----------------
-- ; A frequency shifter effect using the hilbert filter
-- ;
-- ; aout  FreqShifter  adry,kmix,kfreq,kmult,kfback
-- ;
-- ; Performance
-- ; -----------
-- ; adry   --  input audio to be frequency shifted
-- ; kmix   --  dry / wet mix of the output signal (range 0 to 1)
-- ; kfreq  --  frequency of frequency shifter effect (suggested range -1000 to 1000)
-- ; kmult  --  multiplier of frequency value for fine tuning control (suggested range -1 to 1)
-- ; kfback --  control of the amount of output signal fed back into the input of the effect (suggested range 0 to 1)
fxFreqShifter :: Sig -> Sig -> Sig -> Sig -> Sig -> Sig
fxFreqShifter kmix kfreq kmult kfback adry = fromGE $ do
    addUdoPlugin E.freqShifterPlugin
    f <$> toGE adry <*> toGE kmix <*> toGE kfreq <*> toGE kmult <*> toGE kfback
    where f adry' kmix' kfreq' kmult' kfback' = opcs "FreqShifter" [(Ar,[Ar,Kr,Kr,Kr,Kr])] [adry', kmix', kfreq', kmult', kfback']


-- ; LoFi
-- ; ----------------
-- ; 'Low Fidelity' distorting effects of bit reduction and downsampling (foldover)
-- ;
-- ; aout  LoFi  ain,kbits,kfold
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to have low fidelity distortion effects applied
-- ; kbits  --  bit depth reduction (suggested range 0 to 0.6)
-- ; kfold  --  amount of foldover (range 0 to 1)
fxLoFi :: Sig -> Sig -> Sig -> Sig
fxLoFi kbits kfold ain = fromGE $ do
    addUdoPlugin E.loFiPlugin
    f <$> toGE ain <*> toGE kbits <*> toGE kfold
    where f ain' kbits' kfold' = opcs "LoFi" [(Ar,[Ar,Kr,Kr])] [ain', kbits', kfold']

-- ; PanTrem
-- ; ----------------
-- ; Auto-panning and tremolo effects
-- ;
-- ; aout1,aout2  PanTrem  ainL,ainR,,krate,kdepth,kmode,kwave
-- ;
-- ; Performance
-- ; -----------
-- ; ainL   --  first/left input audio
-- ; ainR   --  second/right input audio
-- ; krate  --  rate control of the lfo of the effect *NOT IN HERTZ* (range 0 to 1)
-- ; kdepth --  depth of the lfo of the effect (range 0 to 1)
-- ; kmode  --  mode of the effect (0=auto-panning 1=tremolo)
-- ; kwave  --  waveform used by the lfo (0=sine 1=triangle 2=square)
fxPanTrem :: Sig -> Sig -> Sig -> Sig -> Sig2 -> Sig2
fxPanTrem krate kdepth kmode kwave (ainL, ainR) = toTuple $ do
    addUdoPlugin E.panTremPlugin
    f <$> toGE ainL <*> toGE ainR <*> toGE krate <*> toGE kdepth <*> toGE kmode <*> toGE kwave
    where f ainL' ainR' krate' kdepth' kmode' kwave' = ($ 2) $ mopcs "PanTrem" ([Ar,Ar], [Ar,Ar, Kr,Kr,Kr,Kr]) [ainL', ainR', krate', kdepth', kmode', kwave']

-- ; Tremolo
-- ; ----------------
-- ; Tremolo effect
-- ;
-- ; aout MonoTrem  ain,krate,kdepth,kwave
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio
-- ; krate  --  rate control of the lfo of the effect *NOT IN HERTZ* (range 0 to 1)
-- ; kdepth --  depth of the lfo of the effect (range 0 to 1)
-- ; kwave  --  waveform used by the lfo (0=sine 1=triangle 2=square)
fxMonoTrem :: Sig -> Sig -> Sig -> Sig -> Sig
fxMonoTrem krate kdepth kwave ain = fromGE $ do
    addUdoPlugin E.monoTremPlugin
    f <$> toGE ain <*> toGE krate <*> toGE kdepth <*> toGE kwave
    where f ain' krate' kdepth' kwave' = opcs "MonoTrem" [(Ar, [Ar,Kr,Kr,Kr])] [ain', krate', kdepth', kwave']

-- ; Phaser
-- ; ----------------
-- ; An phase shifting effect that mimics the design of a so called 'stomp box'
-- ;
-- ; aout  Phaser  ain,krate,kdepth,kfreq,kfback
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be pitch shifted
-- ; krate  --  rate of lfo of the effect (range 0 to 1)
-- ; kdepth --  depth of lfo of the effect (range 0 to 1)
-- ; kfreq  --  centre frequency of the phase shifting effect in octaves (suggested range 6 to 11)
-- ; kfback --  feedback and therefore intensity of the effect (range 0 to 1)
fxPhaser :: Sig -> Sig -> Sig -> Sig -> Sig -> Sig
fxPhaser krate kdepth kfreq kfback ain = fromGE $ do
    addUdoPlugin E.phaserPlugin
    f <$> toGE ain <*> toGE krate <*> toGE kdepth <*> toGE kfreq <*> toGE kfback
    where f ain' krate' kdepth' kfreq' kfback' = opcs "Phaser" [(Ar,[Ar,Kr,Kr,Kr,Kr])] [ain', krate', kdepth', kfreq', kfback']

-- ; PitchShifter
-- ; ------------
-- ; A pitch shifter effect based on FFT technology
-- ;
-- ; aout  PitchShifter  ain,kmix,kpitch,kfine,kfback
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be pitch shifted
-- ; kmix   --  dry / wet mix of the output signal (range 0 to 1)
-- ; kscal  -- pitch ratio
-- #### ; kpitch --  pitch shifting interval in thousands of a semitone (suggested range -0.012 to 0.012)
-- #### ; kfine  --  fine control of pitch shifting interval in octaves (range -1/12 to 1/12)
-- ; kfback --  control of the amount of output signal fed back into the input of the effect (suggested range 0 to 1)
fxPitchShifter :: D -> Sig -> Sig -> Sig -> Sig -> Sig
fxPitchShifter ifftsize kmix kscal kfback ain = fromGE $ do
    addUdoPlugin E.pitchShifterPlugin
    f <$> toGE ain <*> toGE kmix <*> toGE kscal <*> toGE kfback <*> toGE ifftsize
    where f ain' kmix' kscal' kfback' ifftsize' = opcs "PitchShifter" [(Ar,[Ar,Kr,Kr,Kr,Ir])] [ain', kmix', kscal', kfback', ifftsize']


-- ; Reverse
-- ; ----------------
-- ; An effect that reverses an audio stream in chunks
-- ;
-- ; aout  Reverse  ain,ktime
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be reversed
-- ; ktime  --  time duration of each chunk (suggested range: 0.3 to 2)--
fxReverse :: Sig -> Sig -> Sig
fxReverse ktime ain = fromGE $ do
    addUdoPlugin E.reversePlugin
    f <$> toGE ain <*> toGE ktime
    where f ain' ktime' = opcs "Reverse" [(Ar,[Ar,Kr])] [ain', ktime']

-- ; RingModulator
-- ; ----------------
-- ; An ring modulating effect with an envelope follower
-- ;
-- ; aout  RingModulator  ain,kmix,kfreq,kenv
-- ;
-- ; Performance
-- ; -----------
-- ; ain    --  input audio to be pitch shifted
-- ; kmix   --  dry / wet mix of the output signal (range 0 to 1)
-- ; kfreq  --  frequency of thew ring modulator *NOT IN HERTZ* (range 0 to 1)
-- ; kenv   --  amount of dynamic envelope following modulation of frequency (range 0 to 1)
fxRingModulator :: Sig -> Sig -> Sig -> Sig -> Sig
fxRingModulator kmix kfreq kenv ain = fromGE $ do
    addUdoPlugin E.ringModulatorPlugin
    f <$> toGE ain <*> toGE kmix <*> toGE kfreq <*> toGE kenv
    where f ain' kmix' kfreq' kenv' = opcs "RingModulator" [(Ar,[Ar,Kr,Kr,Kr])] [ain', kmix', kfreq', kenv']

-- ; StChorus
-- ; ----------------
-- ; A stereo chorus effect
-- ;
-- ; aout  StChorus  ainL,ainR,krate,kdepth,kwidth
-- ;
-- ; Performance
-- ; -----------
-- ; ainL   --  first/left input audio
-- ; ainR   --  second/right input audio
-- ; krate  --  rate control of the lfo of the effect *NOT IN HERTZ* (range 0 to 1)
-- ; kdepth --  depth of the lfo of the effect (range 0 to 1)
-- ; kwidth --  width of stereo widening (range 0 to 1)
fxChorus2 :: Sig -> Sig -> Sig -> Sig2 -> Sig2
fxChorus2 krate kdepth kwidth (ainL, ainR) = toTuple $ do
    addUdoPlugin E.stChorusPlugin
    f <$> toGE ainL <*> toGE ainR <*> toGE krate <*> toGE kdepth <*> toGE kwidth
    where f ainL' ainR' krate' kdepth' kwidth' = ($ 2) $ mopcs "StChorus" ([Ar,Ar], [Ar,Ar,Kr,Kr,Kr]) [ainL', ainR', krate', kdepth', kwidth']

-- aInL, aInR, kdelayTime, kFeedback, kMix, iMaxDelayTime xin

-- | Stereo ping-pong delay effect
--
-- > fxPingPong maxDelayTime kmix width tone time feedback (ainL, ainR)
fxPingPong :: D -> Sig -> Sig -> Sig -> Sig -> Sig -> Sig2 -> Sig2
fxPingPong iMaxDelTime kmix kwidth ktone ktime kfeedback (ainL, ainR) = toTuple $ do
    addUdoPlugin E.stereoPingPongDelayPlugin
    f <$> toGE ainL <*> toGE ainR <*> toGE ktime <*> toGE kfeedback <*> toGE kmix <*> toGE kwidth <*> toGE ktone <*> toGE iMaxDelTime
    where f ainL' ainR' ktime' kfeedback' kmix' kwidth' ktone' iMaxDelTime' = ($ 2) $ mopcs "StereoPingPongDelay" ([Ar,Ar], [Ar,Ar,Kr,Kr,Kr,Kr,Kr,Ir]) [ainL', ainR', ktime', kfeedback', kmix', kwidth', ktone', iMaxDelTime']