#!/usr/bin/perl -w
require 5.008;
use bytes;
use strict;
use POSIX;
use Locale::PO;

use integer;

if (@ARGV == 0 || $ARGV[0] eq '--help') {
  print STDERR "Syntax: $0 PO_FILE...\n";
  exit (@ARGV != 0);
}

for my $po_file (@ARGV) {
  my $todo = $po_file;
  if (!($todo =~ s/\.po$/.todo/)) {
    print STDERR "$po_file: doesn't end '.po'\n";
    next;
  }
  my $po = Locale::PO->load_file_asarray($po_file);
  if (!defined $po) {
    print STDERR "$po_file: Bad!\n";
    next;
  }
  my $c = 0;
  open TODO, '>', $todo or die $!;
  foreach my $po_entry (@{$po}) {
    my $msgid = $po_entry->msgid;
    my $msgstr = $po_entry->msgstr;
    ($msgid eq '""' || $msgstr eq '""' || $po_entry->fuzzy) or next;
    $msgstr =~ s/\\n(..)/\\n"\n"$1/g;
    if ($msgid eq '""') {
      print TODO "msgid $msgid\n";
      print TODO "msgstr \"\"\n$msgstr\n";
      next;
    }
    if (defined $po_entry->automatic) {
      my $automatic = "\n" . $po_entry->automatic;
      $automatic =~ s/\n/\n#. /g;
      while ($automatic =~ s/\n#. \n/\n#.\n/g) { }
      print TODO $automatic;
    }
    my $ref = $po_entry->reference;
    if (defined $ref) {
      $ref = "\n" . $ref;
      $ref =~ s/\n/\n#: /mg;
      print TODO $ref;
    }
    my $fuzzy = $po_entry->fuzzy;
    my $c_format = $po_entry->c_format;
    if ($fuzzy || $c_format) {
      print TODO "\n#";
      print TODO ", fuzzy" if $fuzzy;
      print TODO ", c-format" if $c_format;
    }
    print TODO "\n";
    print TODO "#~ " if $po_entry->obsolete;
    print TODO "msgid $msgid\n";
    print TODO "#~ " if $po_entry->obsolete;
    print TODO "msgstr $msgstr\n";
    ++$c;
  }
  close TODO or die $!;
  ($c == 0) and unlink $todo;
}