#!/usr/bin/perl
use warnings;
use strict;
use Getopt::Long;
use File::SmartTail;
use File::Basename qw( fileparse );
use File::Path qw( make_path );
use File::Copy qw( move );
use Net::FTP;
use POSIX;
$SIG{CHLD} = 'IGNORE';

$|++;    # Autoflush

sub getTimeStamp
{        # parm [ts] => timestamp for filename; log => timestamp for log
    my $format = "%04d%02d%02d%02d%02d%02d";
    my ($p1) = @_;
    if ( defined $p1 and $p1 eq "log" ) {
        $format = "%04d%02d%02d %02d:%02d:%02d";
    }
    my ( $sec, $min, $hour, $mday, $mon, $year, $wday, $yday, $isdst ) =
      localtime(time);
    my $timestamp =
      sprintf( $format, $year + 1900, $mon + 1, $mday, $hour, $min, $sec );
    return $timestamp;
}

sub getUnitName {    # parm => file received ($trfile)
    my ($filename) = @_;
    my ( $fileDate,    $fileTime );
    my ( $unittype,    $unit );
    my ( $filenamecsv, $path, $suffix ) = fileparse( $filename, qr/\.[^.]*/ );
    if ( $filenamecsv =~ m/^G201_ID\d\d\d\d_DT\d\d\d\d_\d*$/i ) {    # G201
        my @strings = $filenamecsv =~
/(.{1,4})_(.{1,6})_(.{1,6})_(.{1,4})(.{1,2})(.{1,2})(.{1,2})(.{1,2})(.{1,2}).*/;
        $unittype = $strings[0];
        $unit     = $strings[1];
        $fileDate = $strings[3] . "/" . $strings[4] . "/" . $strings[5];
        $fileTime = $strings[6] . ":" . $strings[7] . ":" . $strings[8];
    }
    elsif ( $filenamecsv =~ m/^D2W_ID\d\d\d\d_DT\d\d\d\d$/i ) {
        my @strings = $filenamecsv =~ /(.{1,3})_(.{1,6})_(.{1,6}).*/;
        $unittype = $strings[0];
        $unit     = $strings[1];
    }
    else {
        open FILE, $filename
          or warn getTimeStamp("log")
          . " >> Error: opening input file $filename\n";
        ( $fileDate, $fileTime ) = split( /\s/, <FILE> );
        ( $unittype, $unit )     = split( /\s/, uc <FILE> );
        $unit =~ s/;+$//;
        close FILE;
    }
    return $unit;
}

my $readingFile;
my $ftpuser   = "aseftp";
my $ftpuser1  = "asega";
my $recvOKstr = "OK UPLOAD";
my $ext       = ".csv";
my $hostname  = "160.78.21.55";
my $username  = 'asega';
my $password  = 'mums';

GetOptions( "file=s" => \$readingFile )
  or die("Error in command line arguments\n");

my ( $scriptname, $scriptpath ) = fileparse($0);

my $tail = new File::SmartTail;
$tail->WatchFile( -file => $readingFile, -type => "UNIX", -timeout => '10' );

while ( my $line = $tail->GetLine() ) {
    if (
        (
               ( index( $line, $ftpuser ) != -1 )
            or ( index( $line, $ftpuser1 ) != -1 )
        )
        and ( index( $line, $recvOKstr ) != -1 )
      )
    {
        my (
            undef, undef, undef,   $truser, undef,
            $trip, undef, $trfile, $trstat
        ) = split( /[\"\[\]]/, $line );
        my ( $login, $pass, $uid, $gid ) = getpwnam($truser)
          or warn getTimeStamp("log") . " >> $truser not in passwd file.\n";

        my ( $filename, $path, $suffix ) = fileparse( $trfile, qr/\.[^.]*/ );

        if (
            ( ( uc $suffix ) eq ( uc $ext ) )
            and (  $filename =~ m/^(\d\d_\d\d\d\d_|)(DT\d\d\d\d|LOC\d*|GD\d*)$/i
                or $filename =~ m/^G201_ID\d\d\d\d_DT\d\d\d\d_\d*$/i
                or $filename =~ m/^D2W_ID\d\d\d\d_DT\d\d\d\d$/i )
          )
        {
            my $unit = getUnitName($trfile);
            print getTimeStamp("log") . " >> Unit $unit - Filename $trfile\n";
            my $outpath = $path . $unit . "/received";
            my $trnpath = $path . $unit . "/transmitted";
            if ( !-d "$outpath" ) {
                make_path "$outpath",
                  { mode => 0755, owner => $truser, group => $truser }
                  or warn getTimeStamp("log")
                  . " >> Failed to create path: $outpath";
            }
            if ( !-d "$trnpath" ) {
                make_path "$trnpath",
                  { mode => 0755, owner => $truser, group => $truser }
                  or warn getTimeStamp("log")
                  . " >> Failed to create path: $trnpath";
            }
            my $timestamp = getTimeStamp();
            my $dest = $outpath . "/" . $filename . "_" . $timestamp . $suffix;
            my $send = $trnpath . "/" . $filename . "_" . $timestamp . $suffix;
            if ( !move $trfile, $dest ) {
                warn getTimeStamp("log")
                  . " >> Move $trfile -> $dest failed: $!";
            }
            else {
                print getTimeStamp("log") . " >> Moved $trfile -> $dest.\n";
                chmod 0664, $dest;
                my @fname = ($dest);
                chown $uid, $gid, @fname;
            }
            my $ftp = Net::FTP->new(
                $hostname,
                Timeout => 20,
                Debug   => 0,
                Passive => 0
              )
              or warn getTimeStamp("log")
              . " >> Cannot connect to $hostname: $@";
            if ( $ftp->login( $username, $password ) ) {
                if ( $ftp->put( $dest, $filename . $suffix ) ) {
                    if ( !move $dest, $send ) {
                        warn getTimeStamp("log")
                          . " >> Move $dest -> $send failed: $!";
                    }
                    else {
                        print getTimeStamp("log")
                          . " >> Moved $dest -> $send.\n";
                    }
                }
                else {
                    warn getTimeStamp("log") . " >> Put $dest failed ",
                      $ftp->message;
                }
            }
            else {
                warn getTimeStamp("log") . " >> Cannot login ", $ftp->message;
            }
        }
    }
}

exit(0);