require 'rubygems'
require 'fastercsv'
require 'ruby-debug'
 
data = FasterCSV.read(ARGV[0], :headers => :first_row)
columns = %w( PCI5  PCI6  PCI7  PCI9 PCI11 PCI13
              PCI15 PCI21 PCI24
            )
 
headers_extra = columns.map { |col| "p_#{col}" }
puts (data.headers + headers_extra).join(',')
previous_row = nil
 
data.each do |row|
  if previous_row && row['subID'] =~ /^ *$/
    line_one_extra = columns.map {|col| row[col]}
    line_two_extra = columns.map {|col| previous_row[col]}
    puts (previous_row.fields + line_one_extra).map{|col| %Q["#{col}"]}.join(',')
    puts (row.fields + line_two_extra).map{|col| %Q["#{col}"]}.join(',')
  elsif previous_row && previous_row['subID'] !~ /^ *$/
    bogus_line_extra = columns.map {|col| ' '}
    puts (previous_row.fields + bogus_line_extra).map{|col| %Q["#{col}"]}.join(',')
  end
  previous_row = row
end
 
if previous_row['subID'] !~ /^ *$/
  bogus_line_extra = columns.map {|col| ' '}
  puts (previous_row.fields + bogus_line_extra).map{|col| %Q["#{col}"]}.join(',')
end