#!/usr/bin/env ruby

require 'pathname'

chapters = %w(
  Races
  Classes
  Characterizations
  Gameplay
  Equipment
  Gamemastering
  Spells\ (Alt)
  Treasure\ (Alt)
  Monsters\ (Alt)
)

# chapter = h1
# file = h2

`rm chapters/*.md`

chapters.each_with_index do |chapter, i|
  s = "# #{chapter.split.first}\n\n" +
    Pathname(chapter).children.sort.map do |f|
      data = f.read
      data[/^#+ /] = ''  # remove initial heading (it will be re-added as h2)
      hs = data.scan(/^#+ /).sort.uniq.map {|hdg| hdg.size - 1 }
      (hs.length - 1).downto(0) do |h|
        data.gsub! /^\#{#{hs[h]}}/, '#' * (h + 3)
      end
      "\n\n## " + data
    end.join
  File.write "chapters/#{i+1}_#{chapter.split.first}.md", s
end

pandoc_cmd = "pandoc -o Dungeons_and_Dragons_SRD_5.1.epub title.txt chapters/*"
puts pandoc_cmd
system pandoc_cmd