{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}

-- |
-- Module      : $header$
-- Copyright   : (c) Laurent P René de Cotret, 2020
-- License     : GNU GPL, version 2 or above
-- Maintainer  : laurent.decotret@outlook.com
-- Stability   : internal
-- Portability : portable
--
-- Rendering Matlab code blocks
module Text.Pandoc.Filter.Plot.Renderers.Matlab
  ( matlabSupportedSaveFormats,
    matlabCommand,
    matlabCapture,
    matlabAvailable,
  )
where

import System.Directory (exeExtension)
import Text.Pandoc.Filter.Plot.Renderers.Prelude

matlabSupportedSaveFormats :: [SaveFormat]
matlabSupportedSaveFormats = [PNG, PDF, SVG, JPG, EPS, GIF, TIF]

matlabCommand :: OutputSpec -> Text -> Text
matlabCommand OutputSpec {..} exe = [st|#{exe} -batch "run('#{oScriptPath}')"|]

-- On Windows at least, "matlab -help"  actually returns -1, even though the
-- help text is shown successfully!
-- Therefore, we cannot rely on this behavior to know if matlab is present,
-- like other toolkits.
matlabAvailable :: PlotM Bool
matlabAvailable = asksConfig matlabExe >>= (\exe -> liftIO $ existsOnPath (exe <> exeExtension))

matlabCapture :: FigureSpec -> FilePath -> Script
matlabCapture = appendCapture matlabCaptureFragment

matlabCaptureFragment :: FigureSpec -> FilePath -> Script
matlabCaptureFragment FigureSpec {..} fname =
  [st|
if exist("exportgraphics")>0
    exportgraphics(gcf, '#{fname}', 'Resolution', #{dpi});
else
    saveas(gcf, '#{fname}');
end
|]