{- |
Module      : Dodge.SoundLogic
Description : Messages to "Sound" backend

This module allows us to talk to the "Sound" module.
-}
module Dodge.SoundLogic (
    -- * Manipulation of individual sounds
    soundStart,
    soundContinue,
    soundContinueVol,
    soundMultiFrom,
    stopSoundFrom,
--    soundWithStatus,

    -- * helper to determine the angle of a sound given a world position
    soundAngle,

    -- * Manipulation of all sounds
    haltSound,
    resumeSound,
    pauseSound,
    module Dodge.SoundLogic.LoadSound,
) where

import Control.Lens
import Data.Int (Int16)
import qualified Data.Map as M
import Data.Maybe
import Dodge.Data.Universe
import Dodge.SoundLogic.LoadSound
import Geometry.Data
import Geometry.Vector
import Sound.Data
import SDL.Mixer as Mix

-- | Placeholder...
haltSound :: World -> World
haltSound = id

-- | Placeholder...
pauseSound :: Universe -> Universe
pauseSound = uvIOEffects %~ \f u -> do
    Mix.pause (-1)
    f u

-- | Placeholder...
resumeSound :: Universe -> Universe
resumeSound = uvIOEffects %~ \f u -> do
    Mix.resume (-1)
    f u


soundWithStatusVolume ::
    -- | Volume factor, 0 - 1
    Float ->
    PlayStatus ->
    -- | \"Creator\" of sound
    SoundOrigin ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    World
soundWithStatusVolume vol status so fpos sType mtime w =
    w & toPlaySounds
        %~ M.insert
            so
            (aSound vol status fpos sType mtime w)

aSound ::
    -- | Volume factor, 0 - 1
    Float ->
    PlayStatus ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    Sound
aSound vol status fpos sType mtime w =
    Sound
        { _soundChunkID = sType
        , _soundTime = mtime
        , _soundStatus =
            SoundStatus
                { _playStatus = status
                , _soundIsLooping = isJust mtime
                }
        , _soundChannel = Nothing
        , _soundAngDist = Just (a, floor (225 * (1 - vol)))
        , _soundPos = fpos
        , _soundVolume = soundToVol sType * vol
        , _soundVolumeFraction = vol
        }
  where
    a = soundAngle fpos w

soundWithStatus ::
    PlayStatus ->
    -- | \"Creator\" of sound
    SoundOrigin ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    World
soundWithStatus = soundWithStatusVolume 1

soundStart ::
    -- | \"Creator\" of sound
    SoundOrigin ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    World
soundStart = soundWithStatus ToStart

soundContinue ::
    -- | \"Creator\" of sound
    SoundOrigin ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    World
soundContinue = soundWithStatus ToContinueStart

-- this needs to all be cleaned up, moved to general sounds
soundContinueVol ::
    -- | volume
    Float ->
    -- | \"Creator\" of sound
    SoundOrigin ->
    -- | Position of sound
    Point2 ->
    -- | ID of sound to be played
    SoundID ->
    -- | Frames to play sound for, Nothing for until finished
    Maybe Int ->
    World ->
    World
soundContinueVol vol = soundWithStatusVolume vol ToContinueStart

{- | Calculates the angle of a sound with reference to '_cameraViewFrom'.
Within 10 units considers the sound to be directly in front.
-}
soundAngle :: Point2 -> World -> Int16
{-# INLINE soundAngle #-}
soundAngle p w
    | d < 10 = 0
    | otherwise =
        round
            . radToDeg
            . f
            . normalizeAngle
            . (+ pi)
            $ argV (vNormal (p -.- earPos)) - (w ^. wCam . camRot)
  where
    earPos = w ^. wCam . camViewFrom
    d = dist p earPos 
    -- the following should soften the positional effect 
    -- when you are close to the sound source
    f x | x < pi / 2 = x * dfact
        | x < 3 * pi / 2 = pi + (dfact * (x - pi))
        | otherwise = 2*pi + (dfact * (x - 2*pi))
    dfact = min ((d - 10) / 100) 1

{- | Uses the first free origin from a list.
Does nothing if all origins are already creating sounds.
-}
soundMultiFrom ::
    [SoundOrigin] ->
    -- | Position
    Point2 ->
    -- | Sound ID
    SoundID ->
    -- | Frames to play for, Nothing for full length
    Maybe Int ->
    World ->
    World
soundMultiFrom [] _ _ _ w = w
soundMultiFrom (so : sos) pos sType mtime w
    | so `M.member` _playingSounds w = soundMultiFrom sos pos sType mtime w
    | otherwise = over toPlaySounds (M.insert so sound) w
  where
    sound =
        Sound
            { _soundChunkID = sType
            , _soundTime = mtime
            , _soundStatus =
                SoundStatus
                    { _playStatus = ToStart
                    , _soundIsLooping = isJust mtime
                    }
            , _soundChannel = Nothing
            , _soundAngDist = Just (a, 0)
            , _soundPos = pos
            , _soundVolume = soundToVol sType
            , _soundVolumeFraction = 1
            }
    a = soundAngle pos w

-- | Sets '_soundTime' to 0.
stopSoundFrom :: SoundOrigin -> World -> World
stopSoundFrom so = playingSounds . ix so . soundTime ?~ 0

--stopSoundFrom so = over (playingSounds . ix so . soundTime) (fmap $ min 0)