module NPC where

import Affection as A

import qualified Data.Matrix as M
import Data.Ecstasy as E

import Linear

import System.Random

import NanoVG hiding (V2(..))

-- internal imports

import Types.UserData

drawNPCs
  :: Context
  -> [V2 Double]
  -> Double
  -> Double
  -> Int
  -> Int
  -> Affection UserData ()
drawNPCs ctx npcposs prow pcol row col = do
  ud <- getAffection
  let fnpcposs = filter
        (\(V2 nr nc) -> floor nr == row && floor nc == col)
        npcposs
  liftIO $ mapM_
    (\(V2 nr nc) -> do
      let x = realToFrac $ 640 + ((nc - pcol) + (nr - prow)) * 32
          y = realToFrac $ 360 + ((nr - prow) - (nc - pcol)) * 16
      beginPath ctx
      circle ctx x y 5
      closePath ctx
      fillColor ctx (rgba 255 0 0 255)
      fill ctx
      )
    fnpcposs

placeNPCs :: M.Matrix (Maybe ImgId) -> Int -> Affection UserData [V2 Double]
placeNPCs imgmat count =
  doPlace 1 []
  where
    doPlace :: Int -> [V2 Double] -> Affection UserData [V2 Double]
    doPlace nr acc = do
      if nr <= count
      then do
        r <- liftIO $ randomRIO (1, M.nrows imgmat)
        c <- liftIO $ randomRIO (1, M.ncols imgmat)
        if null (imgObstacle $ imgmat M.! (r, c))
        then doPlace (nr + 1) ((V2 (fromIntegral r) (fromIntegral c)) : acc)
        else doPlace nr acc
      else
        return acc