{-
pandoc-crossref is a pandoc filter for numbering figures,
equations, tables and cross-references to them.
Copyright (C) 2015  Nikolay Yakimov <root@livid.pp.ru>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-}

module Text.Pandoc.CrossRef.References.Blocks.CodeBlock where

import Lens.Micro.Mtl
import qualified Data.Text as T
import Text.Pandoc.Definition
import qualified Text.Pandoc.Builder as B

import Text.Pandoc.CrossRef.References.Types
import Text.Pandoc.CrossRef.References.Monad
import Text.Pandoc.CrossRef.References.Blocks.Util
import Text.Pandoc.CrossRef.Util.Options
import Text.Pandoc.CrossRef.Util.Template
import Text.Pandoc.CrossRef.Util.Generic

runCodeBlock :: Attr -> T.Text -> Either T.Text [Inline] -> WS (ReplacedResult Block)
runCodeBlock (label, classes, attrs) code eCaption = do
  opts <- use wsOptions
      --if used with listings package,nothing should be done
  if  | isLatexFormat opts, listings opts -> do
          let cap = either (B.toList . B.text) id eCaption
          ref <- replaceAttr (Just label) attrs cap SPfxLst
          let attrs' =
                [ ("nolol", "true") | refHideFromList ref ] <>
                (("caption", latexCaptionRaw ref) : filter (\(k, _) -> k /= "hidden") attrs)
          replaceNoRecurse $ CodeBlock (label, classes, attrs') code
      --if not using listings, however, wrap it in a codelisting environment
      | isLatexFormat opts -> do
          let cap = either (B.toList . B.text) id eCaption
          ref <- replaceAttr (Just label) attrs cap SPfxLst
          replaceRecurse $ Div nullAttr [
              RawBlock (Format "latex") "\\begin{codelisting}"
            , Plain $ latexCaption ref
            , CodeBlock ("", classes, attrs) code
            , RawBlock (Format "latex") "\\end{codelisting}"
            ]
      | otherwise -> do
          let cap = either (B.toList . B.text) id eCaption
          ref <- replaceAttr (Just label) attrs cap SPfxLst
          idxStr <- chapIndex ref
          let caption' = applyTemplate idxStr cap $ listingTemplate opts
          replaceRecurse $ Div (label, "listing":classes, []) [
              mkCaption opts "Caption" caption'
            , CodeBlock ("", classes, filter ((/="caption") . fst) $ setLabel opts idxStr attrs) code
            ]