-- | Continous controller event and Ctl systems for external control interfaces.
module Sound.Sc3.Ugen.Event where

import Data.List {- base -}

import Data.List.Split {- split -}

import Sound.Sc3.Common.Math {- hsc3 -}
import Sound.Sc3.Common.Rate {- hsc3 -}
import Sound.Sc3.Ugen.Bindings.Db {- hsc3 -}
import Sound.Sc3.Ugen.Bindings.Composite {- hsc3 -}
import Sound.Sc3.Ugen.Types {- hsc3 -}
import Sound.Sc3.Ugen.Util {- hsc3 -}

-- * Cc Event

{- | (v, w, x, y, z, o, rx, ry, p, px, _)

     v = voice, w = gate, z = force/pressure,
     o = orientation/angle, r = radius, p = pitch
-}
type CcEvent t = (Int, t, t, t, t, t, t, t, t, t, t)

-- | Translate list to Event.
cc_event_from_list :: Num t => Int -> [t] -> CcEvent t
cc_event_from_list v l =
  case l of
    [w, x, y, z, o, rx, ry, p, px, py] -> (v, w, x, y, z, o, rx, ry, p, px, py)
    _ -> error "cc_event_from_list?"

{- | (ccEventAddr, ccEventIncr, ccEventZero)

ccEventAddr = k0 = index of control bus zero for event system,
ccEventIncr = stp = voice index increment,
ccEventZero = c0 = offset for event voices at current server
-}
type CcEventMeta t = (t, t, t)

ccEventMetaDefault :: Num n => CcEventMeta n
ccEventMetaDefault = (13000, 10, 0)

ccEventMetaControls :: CcEventMeta Int -> CcEventMeta Ugen
ccEventMetaControls (p,q,r) =
  let k nm i = control kr nm (fromIntegral i)
  in (k "ccEventAddr" p, k "ccEventIncr" q, k "ccEventZero" r)

-- | c = event number (zero indexed)
ccEventAddr :: (Ugen,Ugen,Ugen) -> Int -> CcEvent Ugen
ccEventAddr (k0, stp, c0) c =
  let u = in' 10 kr (k0 + ((c0 + fromIntegral c) * stp))
  in cc_event_from_list c (mceChannels u)

-- | c0 = index of voice (channel) zero for event set, n = number of voices (channels)
ccEventVoicerAddr :: CcEventMeta Ugen -> Int -> (CcEvent Ugen -> Ugen) -> Ugen
ccEventVoicerAddr m n f = mce (map (\c -> f (ccEventAddr m c)) [0 .. n - 1])

-- | 'eventVoicerAddr' with default (addr, inct, zero).
ccEventVoicer :: Int -> (CcEvent Ugen -> Ugen) -> Ugen
ccEventVoicer = ccEventVoicerAddr ccEventMetaDefault

-- | Synonym for ccEventVoicer.
voicer :: Int -> (CcEvent Ugen -> Ugen) -> Ugen
voicer = ccEventVoicer

-- | 'eventVoicerAddr' with 'control' inputs for /eventAddr/, /eventIncr/ and /eventZero/.
ccEventVoicerParam :: Int -> (CcEvent Ugen -> Ugen) -> Ugen
ccEventVoicerParam = ccEventVoicerAddr (ccEventMetaControls ccEventMetaDefault)

{- | Given /g/ and /p/ fields of an 'CcEvent' derive a 'gateReset' from g
and a trigger derived from monitoring /g/ and /p/ for changed values.
-}
ccEventGateReset :: Ugen -> Ugen -> (Ugen, Ugen)
ccEventGateReset g p = let tr = changed p 0.01 + changed g 0.01 in (gateReset g tr,tr)

-- * Ctl

-- | Sequence of 8 continous controller inputs in range (0-1).
type Ctl8 = (Ugen,Ugen,Ugen,Ugen,Ugen,Ugen,Ugen,Ugen)

-- | k0 = index of control bus zero
ctl8At :: Int -> Ctl8
ctl8At k0 =
  let u = in' 8 kr (constant k0)
  in case mceChannels u of
       [cc0,cc1,cc2,cc3,cc4,cc5,cc6,cc7] -> (cc0,cc1,cc2,cc3,cc4,cc5,cc6,cc7)
       _ -> error "ctl8At?"

-- | 'ctlVoicerAddr' with 'control' inputs for /CtlAddr/ and /CtlZero/.
ctl8Voicer :: Int -> (Int -> Ctl8 -> Ugen) -> Ugen
ctl8Voicer n f = mce (map (\c -> f c (ctl8At (11000 + (8 * c)))) [0 .. n - 1])

-- | Sequence of 16 continous controller inputs arranged as two Ctl8 sequences.
type Ctl16 = (Ctl8,Ctl8)

-- | 'ctl16VoicerAddr' with 'control' inputs for /CtlAddr/ and /CtlZero/.
ctl16Voicer :: Int -> (Int -> Ctl16 -> Ugen) -> Ugen
ctl16Voicer n f = mce (map (\c -> let i = 11000 + (16 * c) in f c (ctl8At i,ctl8At (i + 8))) [0 .. n - 1])

-- * Names

-- | Control Specificier.  (name,default,(minValue,maxValue,warpName))
type ControlSpec t = (String,t,(t,t,String))

-- | Comma separated, no spaces.
control_spec_parse :: String -> ControlSpec Double
control_spec_parse str =
  case splitOn "," str of
    [cnmdef,lhs,rhs,wrp] -> case splitOn ":" cnmdef of
                              [cnm,def] -> (cnm,read def,(read lhs,read rhs,wrp))
                              _ -> error ("control_spec_parse: " ++ cnmdef)
    _ -> error ("control_spec_parse: " ++ str)

-- | Semicolon separated, no spaces.
--
-- > control_spec_seq_parse "freq:220,110,440,exp;amp:0.1,0,1,amp;pan:0,-1,1,lin"
control_spec_seq_parse :: String -> [ControlSpec Double]
control_spec_seq_parse = map control_spec_parse . splitOn ";"

-- | Comma separated, 6 decimal places, no spaces.
control_spec_print :: ControlSpec Double -> String
control_spec_print (cnm,def,(lhs,rhs,wrp)) = intercalate "," [concat [cnm,":",double_pp 6 def],double_pp 6 lhs,double_pp 6 rhs,wrp]

-- | Semicolon separated, no spaces.
--
-- > control_spec_seq_print (control_spec_seq_parse "freq:220,220,440,exp;amp:0.1,0,1,amp;pan:0,-1,1,lin")
control_spec_seq_print :: [ControlSpec Double] -> String
control_spec_seq_print = intercalate ";" . map control_spec_print

control_spec_to_control :: ControlSpec Double -> Control
control_spec_to_control (cnm,def,(lhs,rhs,wrp)) =
  let grp = if last cnm `elem` "[]" then Just Control_Range else Nothing
  in Control ControlRate Nothing cnm def False (Just (Control_Meta lhs rhs wrp 0 "" grp)) emptyBrackets

{- | See SCClassLibrary/Common/Control/Spec:ControlSpec.initClass

"ControlSpec defines the range and curve of a control"

This list adds default values.
-}
sc3_control_spec :: Fractional t => [ControlSpec t]
sc3_control_spec =
  [("amp",0.1,(0,1,"amp"))
  ,("beats",1,(0,20,"lin"))
  ,("bipolar",0,(-1,1,"lin"))
  ,("boostcut",0,(-20,20,"lin"))
  ,("db",-12,(-180,0,"db"))
  ,("delay",0.01,(0.0001,1,"exp"))
  ,("detune",0,(-20,20,"lin"))
  ,("freq",440,(20,20000,"exp"))
  ,("lofreq",20,(0.1,100,"exp"))
  ,("midfreq",440,(25,4200,"exp"))
  ,("midi",64,(0,127,"lin"))
  ,("midinote",64,(0,127,"lin"))
  ,("midivelocity",64,(1,127,"lin"))
  ,("pan",0,(-1,1,"lin"))
  ,("phase",0,(0,6.28318,"lin"))
  ,("rate",1,(0.125,8,"exp"))
  ,("rq",0.1,(0.001,2,"exp"))
  ,("unipolar",0,(0,1,"lin"))
  ,("widefreq",440,(0.1,20000,"exp"))]

{- | See Kyma X Revealed, p.403

"The following EventValue names are associated with initial ranges
other than (0,1). EventValue names are not case-sensitive."

This list adds curve specifiers as strings and default values.

> let x = Data.List.intersect (map fst sc3_control_spec) (map fst kyma_event_value_ranges)
> x == ["beats","boostcut","freq","rate"]
> let c z = let (p,q) = unzip z in let f i = filter (flip elem i . fst) in zip (f p sc3_control_spec) (f q kyma_event_value_ranges)
> c (zip x x)

> c [("lofreq","freqlow"),("midfreq","freqmid")]
> lookup "freqhigh" kyma_event_value_ranges
-}
kyma_event_value_ranges :: Fractional t => [ControlSpec t]
kyma_event_value_ranges =
  [("angle",0,(-0.5,1.5,"lin"))
  ,("beats",1,(1,16,"lin"))
  ,("boostcut",0,(-12,12,"lin"))
  ,("bpm",60,(0,2000,"lin"))
  ,("centervalue",0,(-1,1,"lin"))
  ,("coef",0,(-1,1,"lin"))
  ,("cutoff",440,(0,10000,"exp"))
  ,("cycles",1,(0,100,"lin"))
  ,("dcoffset",0,(-1,1,"lin"))
  ,("direction",0,(-1,1,"lin"))
  ,("distance",0,(-2,2,"lin"))
  ,("fmntshift",1,(0.75,1.25,"lin"))
  ,("freq",440,(0,10000,"exp"))
  ,("freqhigh",12000,(8000,24000,"exp")) -- sampleRate / 2
  ,("freqjitter",0,(0,1,"lin"))
  ,("freqlow",120,(0,1000,"exp"))
  ,("freqmid",1200,(1000,8000,"exp"))
  ,("gain",0.1,(0,10,"amp"))
  ,("gaindb",-12,(-128,128,"lin"))
  ,("interval",0,(-24,24,"lin"))
  ,("keynumber",64,(0,127,"lin"))
  ,("logfreq",20,(0,127,"lin"))
  ,("looplength",0,(-1,1,"lin"))
  ,("offset",0,(-1,1,"lin"))
  ,("onduration",0.1,(0,30,"lin"))
  ,("panner",0,(-0.5,1.5,"lin"))
  ,("pitch",64,(0,127,"lin"))
  ,("q",0.1,(0,10,"lin"))
  ,("radius",1,(-2,2,"lin"))
  ,("rate",1,(0,2,"lin"))
  ,("ratio",1,(0,100,"lin"))
  ,("scale",0,(-2,2,"lin"))
  ,("smallInterval",0,(0,12,"lin"))
  ,("steps",1,(1,128,"lin"))
  ,("swing",0,(0,0.5,"lin"))
  ,("threshdb",-12,(-60,0,"lin"))
  ,("timeconstant",1,(0.0001,5,"lin"))
  ,("timeindex",0,(-1,1,"lin"))
  ,("tune",0,(-1,1,"lin"))
  ,("upinterval",0,(0,24,"lin"))]