module Dodge.Placement.Instance.LightSource.Cover where
import Dodge.Data
import Dodge.Base
import Geometry.Data
import ShapePicture
import Shape
import Geometry

import Control.Lens

lampCover :: Float -> Prop
lampCover h = ShapeProp
    { _pjPos = V2 0 0
    , _pjID  = 0
    , _pjRot = 0
    , _pjUpdate = rotateProp 0.15
    , _prDraw = drawLampCover h
    , _prToggle = True
    }
lampCoverWhen :: (World -> Bool) -> Point2 -> Float -> Prop
lampCoverWhen cond pos h = ShapeProp
    { _pjPos = pos
    , _pjID  = 0
    , _pjRot = 0
    , _pjUpdate = setToggle cond `dbArgChain` rotateProp 0.15
    , _prDraw = drawLampCover h
    , _prToggle = True
    }

doubleLampCover :: Float -> Prop
doubleLampCover h = ShapeProp
    { _pjPos = V2 0 0
    , _pjID  = 0
    , _pjRot = 0
    , _pjUpdate = rotateProp 0.15
    , _prDraw = drawDoubleLampCover h
    , _prToggle = True
    }

-- on the current (27/9/21) version of shadow stencilling, this glitches
-- slightly when the shadow rotates towards the screen
verticalLampCover :: Float -> Prop
verticalLampCover h = ShapeProp
    { _pjPos = V2 0 0
    , _pjID  = 0
    , _pjRot = 0
    , _pjUpdate = rotateProp 0.15
    , _prDraw = drawVerticalLampCover h
    , _prToggle = True
    }

rotateProp :: Float -> Prop -> World -> World
rotateProp rotAmount pr w = w
    & props . ix (_pjID pr) . pjRot +~ rotAmount

setToggle :: (World -> Bool) -> Prop -> World -> World
setToggle cond pr w = w & props . ix (_pjID pr) . prToggle .~ cond w

drawLampCover :: Float -> Prop -> SPic
drawLampCover h pr | not (_prToggle pr) = mempty
                   | otherwise =
    ( translateSHz (h-2.5) . uncurryV translateSHf pos 
        $ rotateSH a $ mconcat
        [ translateSHz 1 . upperPrismPoly 1 $ rectNSEW 3 2    3 (-1)
        , translateSHz 1 . upperPrismPoly 1 $ rectNSEW 3 (-1) 3 2
        , translateSHz 2 . upperPrismPoly 1 $ rectNSEW 3 2    3 (-1)
        , translateSHz 2 . upperPrismPoly 1 $ rectNSEW 3 (-1) 3 2
        , upperPrismPoly 1 [V2 2 2,V2 (-1) 2,V2 2 (-1)]
        ]
    , mempty
    )
  where
    a = _pjRot pr
    pos = _pjPos pr

drawDoubleLampCover :: Float -> Prop -> SPic
drawDoubleLampCover h pr =
    ( translateSHz (h-2.5) . uncurryV translateSHf pos 
        $ rotateSH a $ mconcat
        [ upperPrismPoly 5 $ rectNSEW 6 5       6 (-6)
        , upperPrismPoly 5 $ rectNSEW (-5) (-6) 6 (-6)
        , upperPrismPoly 1 [V2 0 (-1),V2 6 5,V2 (-6) 5]
        , upperPrismPoly 1 [V2 0   1 ,V2 (-6) (-5),V2 6 (-5)]
        ]
    , mempty
    )
  where
    a = _pjRot pr
    pos = _pjPos pr

drawVerticalLampCover :: Float -> Prop -> SPic
drawVerticalLampCover h pr =
    ( translateSHz h . uncurryV translateSHf pos 
        $ rotateSHx a $ mconcat
        [ 
        translateSHz (-3) . upperPrismPoly 1 $ rectNSEW 2 (-2) 5 (-5)
        ]
    , mempty
    )
  where
    a = _pjRot pr
    pos = _pjPos pr