--[[
************************************************************************
* Copyright 2021 by Bastien Dumont (bastien.dumont@posteo.net)
*
* This file 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 3 of the License, or
* (at your option) any later version.
*
* This file 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 file.  If not, see <https://www.gnu.org/licenses/>.
*
************************************************************************
]]--

local function isLineIndication(first, middle, last)
   return last.t == 'Str' and string.match(last.text, '^l. [^,]+,?$')
      and middle.t == 'Space'
      and first.t == 'Str' and string.match(first.text, '.+,$')
end

local function isCommaAfterLineIndication(lineIndication)
   return string.match(lineIndication, '.+,$')
end

function Inlines (inlines)
   for i = #inlines, 3, -1 do
      if isLineIndication(inlines[i-2], inlines[i-1], inlines[i]) then
         firstString = inlines[i-2].text
         inlines[i-2].text = string.match(firstString, '^[^,]+')
         if isCommaAfterLineIndication(inlines[i].text) then
            inlines[i].text = string.match(inlines[i].text, '^[^,]+')
            inlines:insert(i+1, pandoc.Str(','))
         end
         inlines[i] = pandoc.Superscript(pandoc.Str(string.sub(inlines[i].text, 5)))
         inlines:remove(i-1)
      end
   end
   return inlines
end