#!/usr/bin/perl

use strict;
use Getopt::Std;
use Date::Format;
use File::Temp 'tempdir';
use Net::FTP;
use FS::UID qw(adminsuidsetup datasrc dbh);
use FS::cdr;
use FS::cdr_batch;
use FS::Record qw(qsearch qsearchs);
use Date::Format 'time2str';
use Date::Parse 'str2time';


###
# parse command line
###

use vars qw( $opt_d $opt_v $opt_c $opt_s $opt_e $opt_a );
getopts('dvc:s:e:a');

my ($user, $login, $password) = @ARGV;
($user and $login and $password) or die &usage;

my $dbh = adminsuidsetup $user;
$FS::UID::AutoCommit = 0;

# index already-downloaded batches
my @previous = qsearch({
    'table'     => 'cdr_batch',
    'hashref'   => { 'cdrbatch' => {op=>'like', value=>'thinktel%'} },
    'order_by'  => 'ORDER BY cdrbatch DESC',
});
my %exists = map {$_->cdrbatch => 1} @previous;

my $tempdir = tempdir( CLEANUP => !$opt_v );

my $format = 'thinktel';
my $hostname = 'ucontrol.thinktel.ca';

my $ftp = Net::FTP->new($hostname, Debug => $opt_d)
  or die "Can't connect to $hostname: $@\n";

$ftp->login($login, $password)
  or die "Login failed: ".$ftp->message."\n";

###
# get the file list
###

warn "Retrieving directory listing\n" if $opt_v;

$ftp->cwd('/');
my @files = grep { $_ =~ /MetaSwitch/ } $ftp->ls();

warn scalar(@files)." CDR files found.\n" if $opt_v;
# apply date range
if ( $opt_a ) {
  my $most_recent = $previous[0];
  if ($most_recent) {
    if ($most_recent->cdrbatch =~ /^thinktel-(\d+)/) {
      my $date = $1;
      warn "limiting to dates > $date (from most recent batch)\n" if $opt_v;
      @files = grep { /^(\d+)_/ && $1 > $date } @files;
    }
  } # else download them all
}
if ( $opt_s ) {
  # start date
  # normalize date format
  $opt_s = time2str('%Y%m%d', str2time($opt_s)) if $opt_s =~ /\D/;
  warn "limiting to dates > $opt_s\n" if $opt_v;
  @files= grep { /^(\d+)_/ && $1 >= $opt_s } @files;
}
if ( $opt_e ) {
  # end date
  $opt_e = time2str('%Y%m%d', str2time($opt_e)) if $opt_e =~ /\D/;
  warn "limiting to dates < $opt_e\n" if $opt_v;
  @files= grep { /^(\d+)_/ && $1 < $opt_e } @files;
}
warn scalar(@files) ." files to be downloaded to '$tempdir'\n" if $opt_v;
foreach my $file (@files) {

  warn "downloading $file\n" if $opt_v;
  $ftp->get($file, "$tempdir/$file");
  warn "processing $file\n" if $opt_v;

  my $batchname = "$format-$file";
  if ($exists{$batchname}) {
    warn "already imported $file\n";
    next;
  }
  my $import_options = {
    'file'            => "$tempdir/$file",
    'format'          => $format,
    'batch_namevalue' => $batchname,
    'empty_ok'        => 1,
  };
  $import_options->{'cdrtypenum'} = $opt_c if $opt_c;
  
  my $error = FS::cdr::batch_import($import_options);

  if ( $error ) {
    die "error processing $file: $error\n";
  }
}
warn "finished\n" if $opt_v;
$dbh->commit;

###
# subs
###

sub usage {
  "Usage: \n  freeside-cdr-thinktel [ options ] user login password
  Options:
    -v: be verbose
    -d: enable FTP debugging (very noisy)
    -c num: apply a cdrtypenum to the imported CDRs
    -s date: start date
    -e date: end date
    -a: automatically choose start date from most recently downloaded batch

";
}