module Engine.Camera.Event.Handler
  ( handler
  ) where

import RIO

import Engine.Camera qualified as Camera
import Engine.Camera.Controls qualified as Controls
import Engine.Camera.Event.Type (Event)
import Engine.Camera.Event.Type qualified as Event
import Engine.Worker qualified as Worker

handler
  :: MonadIO m
  => m Controls.ViewProcess
  -> m Controls.ControlsProcess
  -> Event
  -> m ()
handler :: m ViewProcess -> m ControlsProcess -> Event -> m ()
handler m ViewProcess
getViewP m ControlsProcess
getCameraControls = \case
  Event.Zoom Float
delta -> do
    ViewProcess
cameraView <- m ViewProcess
getViewP
    ViewProcess
-> (GetInput ViewProcess -> GetInput ViewProcess) -> m ()
forall (m :: * -> *) var.
(MonadIO m, HasInput var) =>
var -> (GetInput var -> GetInput var) -> m ()
Worker.pushInput ViewProcess
cameraView \GetInput ViewProcess
voi -> GetInput ViewProcess
ViewOrbitalInput
voi
      { $sel:orbitDistance:ViewOrbitalInput :: Float
Camera.orbitDistance =
          Float -> Float -> Float
forall a. Ord a => a -> a -> a
max Float
0.5 (Float -> Float) -> Float -> Float
forall a b. (a -> b) -> a -> b
$ ViewOrbitalInput -> Float
Camera.orbitDistance GetInput ViewProcess
ViewOrbitalInput
voi Float -> Float -> Float
forall a. Num a => a -> a -> a
- Float
delta Float -> Float -> Float
forall a. Num a => a -> a -> a
* Float
0.5
      }

  Event.Pan Vec3
delta -> do
    ViewProcess
cameraView <- m ViewProcess
getViewP
    ViewProcess -> Vec3 -> m ()
forall (m :: * -> *). MonadIO m => ViewProcess -> Vec3 -> m ()
Controls.panInstant ViewProcess
cameraView Vec3
delta

  Event.PanHorizontal Float
delta -> do
    ControlsProcess
controls <- m ControlsProcess
getCameraControls
    Timed Float ()
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall (m :: * -> *) var.
(MonadIO m, HasConfig var) =>
var -> (GetConfig var -> GetConfig var) -> m ()
Worker.modifyConfig (ControlsProcess -> Timed Float ()
forall a. Controls a -> a
Controls.panHorizontal ControlsProcess
controls) ((GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
 -> m ())
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall a b. (a -> b) -> a -> b
$
      Float -> Float -> Float
forall a b. a -> b -> a
const Float
delta

  Event.PanVertical Float
delta -> do
    ControlsProcess
controls <- m ControlsProcess
getCameraControls
    Timed Float ()
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall (m :: * -> *) var.
(MonadIO m, HasConfig var) =>
var -> (GetConfig var -> GetConfig var) -> m ()
Worker.modifyConfig (ControlsProcess -> Timed Float ()
forall a. Controls a -> a
Controls.panVertical ControlsProcess
controls) ((GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
 -> m ())
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall a b. (a -> b) -> a -> b
$
      Float -> Float -> Float
forall a b. a -> b -> a
const Float
delta

  Event.TurnAzimuth Float
delta -> do
    ControlsProcess
controls <- m ControlsProcess
getCameraControls
    Timed Float ()
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall (m :: * -> *) var.
(MonadIO m, HasConfig var) =>
var -> (GetConfig var -> GetConfig var) -> m ()
Worker.modifyConfig (ControlsProcess -> Timed Float ()
forall a. Controls a -> a
Controls.turnAzimuth ControlsProcess
controls) ((GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
 -> m ())
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall a b. (a -> b) -> a -> b
$
      Float -> Float -> Float
forall a b. a -> b -> a
const Float
delta

  Event.TurnInclination Float
delta -> do
    ControlsProcess
controls <- m ControlsProcess
getCameraControls
    Timed Float ()
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall (m :: * -> *) var.
(MonadIO m, HasConfig var) =>
var -> (GetConfig var -> GetConfig var) -> m ()
Worker.modifyConfig (ControlsProcess -> Timed Float ()
forall a. Controls a -> a
Controls.turnInclination ControlsProcess
controls) ((GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
 -> m ())
-> (GetConfig (Timed Float ()) -> GetConfig (Timed Float ()))
-> m ()
forall a b. (a -> b) -> a -> b
$
      Float -> Float -> Float
forall a b. a -> b -> a
const Float
delta