class PxIndexBuilder

# File lib/pxindex-builder.rb, line 15
def initialize(obj, debug: false, ignore: [])
  
  @debug = debug
  puts 'inside initialize: ' if @debug
  
  if obj.is_a? String then
  
    s, _ = RXFHelper.read(obj)
    
    s =~ /^---/ ?  import_phrases(YAML.load(s), s, ignore) : import_index(s)
    
  elsif obj.is_a? Hash
    import_phrases obj, s, ignore
  end
  
end

# File lib/pxindex-builder.rb, line 35
def import_index(raw_s)
  
  # find the entries which aren't on the main index
  s = raw_s.sub(/<[^>]+>\n/,'')
  doc = LineTree.new(s, debug: @debug).to_doc(encapsulate: true)
  a = doc.root.xpath('entry/text()')
  puts 'a: ' + a.inspect if @debug
  puts 'doc: ' + doc.xml if @debug
  a2 = doc.root.xpath('entry//entry/text()')
  puts 'a2: ' + a2.inspect if @debug
  a3 = a2.map(&:rstrip) - a.map(&:rstrip)
  puts 'a3:' + a3.inspect if @debug
  
  # add the new entries to the main index
  s << "\n" + a3.join("\n")

  s.prepend '<?ph schema="entries/section[heading]/entry[title, url]"?>

  '
  
  @to_s = s
    
end

# File lib/pxindex-builder.rb, line 59
def import_phrases(h, s, ignore=[])

  words = h.keys.join(' ').split(/ +/).map {|x| x[/\w+/]}.uniq\
    #.tap {|x| puts 't: ' + x.inspect}
    .reject {|x| x.length < 3}\
    .reject {|x| ignore.include? x}\
    .reject {|x| x.length < 4 and !WordsDotDat.list.include? x.downcase}\
    .group_by(&:chr).sort

  pl = PhraseLookup.new s  

  index = words.map do |letter, list|

    a = list.map do |w| 
      phrases = pl.q(w)
      [w, phrases, phrases.map {|x| h[x] }.max]
    end

    [letter, a.sort_by(&:last).reverse]

  end

  @to_h = h = scan(index)
  puts 'h: ' + h.inspect if @debug
  @to_xml = PolyrexBuilder.new(h, parents: %i(entry)).to_xml


end

# File lib/pxindex-builder.rb, line 90
def scan(rows)

  rows.map do |x|

    head, body, _ = x
    
    a = [{title: head}]
    a << scan(body) if body and body.any?
    a

  end

end