module Main
where

import qualified Data.Array.Repa as R (map, reshape)
import qualified Data.Array.Repa.IO.BMP as R (writeComponentsToBMP)
import System.Environment (getArgs)

import Grid (make_grid, zoom)
import MRI
import Values (drop_z, zoom_shape)

zoom_factor :: (Int, Int, Int)
zoom_factor = (1,2,2)


main :: IO ()
main = do
--  args <- getArgs
--  let color = head args
  let in_file = "./data/mri.bin"
  let out_file = "output.bmp"
  arr <- read_word16s in_file
  let arrBrack = bracket_array arr
  let arrInv   = flip_x $ flip_y arrBrack
  let arrSlice = z_slice 50 arrInv
  let arrSlice' = R.reshape mri_slice3d arrSlice
  let dbl_data = R.map fromIntegral arrSlice'
  let g = make_grid 1 dbl_data
  let output = zoom g zoom_factor
  let mri_slice2d = drop_z $ zoom_shape zoom_factor mri_slice3d
  let colors = values_to_colors $ R.reshape mri_slice2d output
  let routput = R.map (\(red, _,     _)    -> red)   colors
  let goutput = R.map (\(_,   green, _)    -> green) colors
  let boutput = R.map (\(_,   _,     blue) -> blue)  colors
  R.writeComponentsToBMP out_file routput goutput boutput