#!/usr/bin/perl -w

use Cwd;
use warnings;
use strict;
use Getopt::Long;

use constant BLOCKLEN  => 2048;
use constant FIXRECORD => 180;

my ($trace, $help, $infile);
my $swap = '';
my $indir  = getcwd;
my $outdir = getcwd;

GetOptions (
	"h|help"	=> \$help,
	"filename|f=s"	=> \$infile,
	"swap|s"	=> \$swap,
	"input|i=s"	=> \$indir,
	"output|o=s"	=> \$outdir,
	"trace|t"	=> \$trace
) or usage();

my $template  = "A8 A1 A2 A2 A5 A3 A20 A20 A2 A3 A2 A2 A28 A2 A3 A5 A1 A1 A1 A6 A6 A6 A6 A6 A1 A6 A3 A15 A7 A7 H*";
#my @fldsize = (A8 A1 A2 A2 A5 A3 A20 A20 A2 A3 A2 A2 A28 A2 A3 A5 A1 A1 A1 A6 A6 A6 A6 A6 A1 A6 A3 A15 A7 A7 H*);

my @fldname = (
	"Call Identification Number",	"Cause for Output",		"Record Type",
	"Record Number",		"Record Sequence Number",	"Record Size",
	"X Number",			"A Sub Number",			"A Category",
	"A Sub Number Type",		"A Sub Numbering Plan Ind",	"A Sub Type",
	"B Sub Number",			"B Category",			"B Sub Number Type",
	"Fault Code",			"Call Status",			"Force Disconnection Info",
	"Abnormal Call Release Ind",	"Start Date",			"Start Time",
	"End Date",			"End Time",			"Duration",
	"Pulse Charging Ind",		"Number of Meter Pulses",	"Tariff Class",
	"Exchange ID",			"Outgoing Route",		"Incoming Route",
	"Additional TAG"
);

sub usage {
	print ("USAGE: $0 -i <input_folder> -o <output_folder> -f <input_filename>\n\n");
	exit;
}

my $outfile = $infile;
my ($data, $cdr, $offset, $recLen);
my ($callid,$cause,$recType,$recNum,$recSeq);
my @rec = ();

if ($infile) {
	open (OUTPUT, ">$outdir/$outfile") or die ("Can't open $outdir/$outfile\n");
	open (DATA, "$indir/$infile") or die ("Can't open $indir/$infile\n");
	binmode DATA;

	while (read(DATA, $data,2048)) {
		$recLen = 0;
		$offset = 0;

		foreach my $val ($data) {
			($callid,$cause,$recType,$recNum,$recSeq,$recLen) = unpack "A8 A1 A2 A2 A5 A3", $val;

			#if ($recLen == 0x81) {
			#$recLen = unpack "C3", substr $data, 18, 3, '';
			#}

			#$cdr = substr($data, $offset, $recLen);
			#@rec = unpack $template, $cdr;
			print "RECLen : $callid,$cause,$recType,$recNum,$recSeq,$recLen,$offset\n";
			$offset += $recLen;
		}
	}
	print "~~~~~~~~~~~~~~~~~~~~~~~~~~~ NEXT BLOCK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
	close(DATA);
	close(OUTPUT);
}