module Main
where

import qualified Data.Array.Repa as R
import System.Environment (getArgs)

import Grid (make_grid, zoom, zoom_chunk)
import MRI


in_file :: FilePath
in_file = "./data/mri.bin"


main :: IO ()
main = main2d_chunk


main2d_chunk :: IO ()
main2d_chunk = do
  (s:_) <- getArgs
  let scale = read s :: Int
  let zoom_factor = (1, scale, scale)
  let out_file = "output.bmp"
  arr <- read_word16s in_file
  let arr' = swap_bytes arr
  let arrInv   = flip_x $ flip_y arr'
  let arrSlice = z_slice3 50 arrInv
  let dbl_data = R.map fromIntegral arrSlice
  let g = make_grid 1 dbl_data
  let output = zoom_chunk g zoom_factor
  write_values_chunk_to_bitmap output out_file



main3d :: IO ()
main3d = do
  (s:_) <- getArgs
  let scale = read s :: Int
  let zoom_factor = (scale, scale, scale)
  let out_file = "output.bin"
  arr <- read_word16s in_file
  let arr' = swap_bytes arr
--  let arrInv   = flip_x $ flip_y arr'
  let arrMRI = R.reshape mri_shape arr'
  let dbl_data = R.force $ R.map fromIntegral arrMRI
  let g = make_grid 1 dbl_data
  let output = zoom g zoom_factor
  let word16_output = bracket_array output
  write_word16s out_file word16_output


main2d :: IO ()
main2d = do
  (s:_) <- getArgs
  let scale = read s :: Int
  let zoom_factor = (1, scale, scale)
  let out_file = "output.bmp"
  arr <- read_word16s in_file
  let arr' = swap_bytes arr
  let arrInv   = flip_x $ flip_y arr'
  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
  write_values_slice_to_bitmap (z_slice 0 output) out_file