{-# OPTIONS_GHC -Wno-unused-imports #-}

module Dodge.Projectile.Update where

import Control.Lens
import qualified Data.Map.Strict as M
import Data.Maybe
import Dodge.Base
import Dodge.Data.World
import Dodge.Default.Weapon
import Dodge.EnergyBall
import Dodge.Item.Location
import Dodge.Item.Weapon.Launcher
import Dodge.Item.Weapon.Remote
import Dodge.Item.Weapon.Shell
import Dodge.Item.Weapon.TriggerType
import Dodge.Movement.Turn
import Dodge.Payload
import Dodge.Reloading.Action
import Dodge.SoundLogic
import Dodge.SoundLogic.LoadSound
import Dodge.WorldEvent.Cloud
import Geometry
import qualified IntMapHelp as IM
import RandomHelp
import qualified SDL

updateProjectile :: Proj -> World -> World
updateProjectile pj = case pj of
    Shell{} -> upsProjectile pj

shellCollisionCheck :: (Proj -> World -> World) -> Proj -> World -> World
shellCollisionCheck doExplode pj w
    | time > 330 && circOnSomeWall oldPos 4 w = doExplode pj w
    | time <= 330 && anythingHitCirc 2 oldPos newPos w = doExplode pj w
    | time <= 0 = doExplode pj w
    | otherwise = w
  where
    time = _prjTimer pj
    oldPos = _prjPos pj
    vel = _prjVel pj
    newPos = oldPos +.+ vel

remoteShellCollisionCheck :: Proj -> World -> World
remoteShellCollisionCheck = shellCollisionCheck $ \pj -> explodeRemoteRocket (fromJust (_prjMITID pj)) (_prjID pj)

plainShellCollisionCheck :: Proj -> World -> World
plainShellCollisionCheck = shellCollisionCheck $ \pj ->
             usePayload (_prjPayload pj) (_prjPos pj)
            . stopSoundFrom (ShellSound (_prjID pj))
            . (cWorld . lWorld . projectiles %~ IM.delete (_prjID pj))

upsProjectile :: Proj -> World -> World
upsProjectile pj w' = foldr (`upProjectile` pj) w' (_prjUpdates pj)

upProjectile :: ProjectileUpdate -> Proj -> World -> World
upProjectile pu pj = case pu of
    PJRemoteShellCollisionCheck -> remoteShellCollisionCheck pj
    PJShellCollisionCheck -> plainShellCollisionCheck pj
    PJDecTimMvVel -> decTimMvVel pj
    PJThrust st et
        | act st et -> doThrust pj
        | otherwise -> id
    PJSpin t cid spinamount
        | ain t -> trySpinByCID cid spinamount pj
        | otherwise -> id
    PJTrack st et itid
        | act st et -> pjTrack itid pj
        | otherwise -> id
    PJReduceSpin x -> reduceSpinBy x pj
    PJRemoteDirection st et cid itid
        | act st et -> setRemoteDir cid itid pj
        | otherwise -> id
    PJSetScope itid -> setRemoteScope itid (_prjPos pj)
    PJRetireRemote itid 0 pjid -> retireRemoteProj itid pjid
    PJRetireRemote _ _ pjid -> cWorld . lWorld . projectiles . ix pjid . prjUpdates . ix 0 . pjuTimer -~ 1
  where
    time = _prjTimer pj
    act st et = time <= st && time >= et
    ain t = time == t

retireRemoteProj :: Int -> Int -> World -> World
retireRemoteProj itid pjid w =
    w
        & pointerToItemLocation (w ^?! cWorld . lWorld . itemLocations . ix itid)
            %~ ( (itScope . scopePos .~ V2 0 0)
                    . (itUse . heldUse .~ HeldFireRemoteShell)
               )
        & cWorld . lWorld . props %~ IM.delete pjid

setRemoteDir :: Int -> Int -> Proj -> World -> World
setRemoteDir cid itid pj w = w & cWorld . lWorld . projectiles . ix (_prjID pj) . prjAcc .~ turntonewdir
  where
    turntonewdir = magV (_prjAcc pj) *.* unitVectorAtAngle newdir
    --i = _prjID pj
    newdir
        | SDL.ButtonRight `M.member` _mouseButtons w
            && w ^? cWorld . lWorld . creatures . ix cid . crInvSel . iselPos
                == w ^? cWorld . lWorld . itemLocations . ix itid . ipInvID
            = (w ^. cWorld . lWorld . camPos . camRot) + argV (_mousePos w)
        | otherwise = _prjDir pj

doThrust :: Proj -> World -> World
doThrust pj w =
    w
        & randGen .~ g
        & cWorld . lWorld . projectiles . ix i . prjVel %~ (\v -> accel +.+ frict *.* v)
        & soundContinue (ShellSound i) newPos missileLaunchS (Just 1)
        & makeFlamelet (oldPos -.- vel) 0 (vel +.+ rotateV (pi + sparkD) accel) 3 10
        & shellTrailCloud (addZ 20 (oldPos +.+ r1 +.+ 30 *.* normalizeV (oldPos -.- newPos)))
  where
    accel = _prjAcc pj
    i = _prjID pj
    oldPos = _prjPos pj
    vel = _prjVel pj
    newPos = oldPos +.+ vel
    (frict, g) = randomR (0.6, 0.9) $ _randGen w
    (sparkD, _) = randomR (-0.2, 0.2) $ _randGen w
    r1 = randInCirc 10 & evalState $ _randGen w

trySpinByCID ::
    -- | creature id
    Int ->
    -- | Spin amount
    Int ->
    Proj ->
    World ->
    World
trySpinByCID cid i pj w = w & cWorld . lWorld . projectiles . ix pjid . prjSpin .~ newSpin
  where
    pjid = _prjID pj
    dir = argV $ _prjVel pj
    newSpin = case w ^? cWorld . lWorld . creatures . ix cid of
        Just cr -> negate $ min 0.2 $ max (-0.2) $ normalizeAnglePi (dir - _crDir cr) / spinFactor
        _ -> 0
    spinFactor = 5 * (6 - fromIntegral i)

pjTrack :: Int -> Proj -> World -> World
pjTrack itid pj w = rotateToTarget pj w
  where
    rotateToTarget _ = fromMaybe id $ do
        tpos <- w ^? itPoint . itTargeting . tgPos . _Just
        return $
            cWorld . lWorld . projectiles . ix (_prjID pj) . prjSpin
                .~ turnToAmount
                    0.15
                    (_prjPos pj)
                    tpos
                    (argV $ _prjAcc pj)
    itPoint = pointerToItemLocation $ w ^?! cWorld . lWorld . itemLocations . ix itid

reduceSpinBy :: Float -> Proj -> World -> World
reduceSpinBy x pj = cWorld . lWorld . projectiles . ix (_prjID pj) . prjSpin *~ x