class Asciidoctor::Timings

def convert
  @log[:convert] || 0
end

def initialize
  @log = {}
  @timers = {}
end

def print_report to = $stdout, subject = nil
  to.puts %(Input file: #{subject}) if subject
  to.puts %(  Time to read and parse source: #{'%05.5f' % read_parse.to_i})
  to.puts %(  Time to convert document: #{'%05.5f' % convert.to_i})
  to.puts %(  Total time (read, parse and convert): #{'%05.5f' % read_parse_convert.to_i})
end

def read_parse
  (time = (@log[:read] || 0) + (@log[:parse] || 0)) > 0 ? time : nil
end

def read_parse_convert
  (time = (@log[:read] || 0) + (@log[:parse] || 0) + (@log[:convert] || 0)) > 0 ? time : nil
end

def record key
  @log[key] = (::Time.now - (@timers.delete key))
end

def start key
  @timers[key] = ::Time.now
end

def total
  (time = (@log[:read] || 0) + (@log[:parse] || 0) + (@log[:convert] || 0) + (@log[:write] || 0)) > 0 ? time : nil
end