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#!/usr/bin/env perl
use strict;
use warnings;
use 5.010;

no if $] >= 5.018, warnings => "experimental::smartmatch";

our $VERSION = '0.00';

binmode( STDOUT, ':encoding(utf-8)' );

use Getopt::Long qw(:config no_ignore_case);
use List::Util qw(max);
use Travel::Status::DE::ASEAG;

my (@grep_lines);
my $full_route = 0;
my $hide_past  = 1;

GetOptions(
	'a|route-after'  => sub { $full_route = 'after' },
	'b|route-before' => sub { $full_route = 'before' },
	'h|help'         => sub { show_help(0) },
	'f|full-route'   => \$full_route,
	'l|line=s@'      => \@grep_lines,
	'p|with-past'    => sub { $hide_past  = 0 },
	'V|version'      => \&show_version,

) or show_help(1);

if ( @ARGV != 1 ) {
	show_help(1);
}

# --line=foo,bar support
@grep_lines = split( qr{,}, join( q{,}, @grep_lines ) );

my ($stop_name) = @ARGV;

my $status = Travel::Status::DE::ASEAG->new;

sub show_help {
	my ($code) = @_;

	print "Usage: B<aseag-m> [ B<-l> I<lines> ] [B<-f>] I< <stop name>\n"
	  . "See also: man aseag-m\n";

	exit $code;
}

sub show_version {
	say "aseag-m version ${VERSION}";

	exit 0;
}

sub display_result {
	my (@lines) = @_;

	my @line_length;

	if ( not @lines ) {
		die("Nothing to show\n");
	}

	for my $i ( 0 .. 2 ) {
		$line_length[$i] = max map { length( $_->[$i] ) } @lines;
	}

	for my $line (@lines) {

		printf(
			join( q{  }, ( map { "%-${_}s" } @line_length ) ) . "\n",
			@{$line}[ 0 .. 2 ]
		);

		if ($full_route) {
			print "\n" . $line->[3] . "\n\n\n";
		}
	}

	return;
}

sub show_results {
	my @output;

	for my $d (
		$status->results(
			full_routes => $full_route,
			hide_past   => $hide_past,
			stop        => $stop_name,
		)
	  )
	{

		my $dtime = $d->time;

		if ( ( @grep_lines and not( $d->line ~~ \@grep_lines ) ) ) {
			next;
		}

		push(
			@output,
			[
				$dtime,
				$d->line,
				$d->destination,
				join( "\n",
					map { sprintf( '%-8s  %s', @{$_} ) }
					  @{ $d->route_timetable } )
			]
		);
	}

	display_result(@output);

	return;
}

if ( my $err = $status->errstr ) {
	say STDERR "Request error: ${err}";
	exit 2;
}

show_results();

__END__

=head1 NAME

aseag-m - Unofficial interface to the ASEAG departure monitor

=head1 SYNOPSIS

B<aseag-m> I<name>

=head1 VERSION

version 0.00

=head1 DESCRIPTION

B<aseag-m> lists upcoming bus departures at the ASEAG stop I<name>.

=head1 OPTIONS

=over

=item B<-a>, B<--route-after>

For each departure, show all of the line's stops after I<name> as well.

=item B<-b>, B<--route-before>

For each departure, show all of the line's stops before I<name> as well.

=item B<-f>, B<--full-route>

For each departure, show all other stops serviced by the respective line.

=item B<-l>, B<--line> I<lines>

Only show departures of I<lines> (comma-separatad list, option may be
repeated)

=item B<-p>, B<--with-past>

Also show departures in the past. Also appleas to the route information of
B<-a> / B<-b> / B<-f>.

=item B<-V>, B<--version>

Show version information.

=back

=head1 EXIT STATUS

Zero.

=head1 CONFIGURATION

None.

=head1 DEPENDENCIES

=over

=item * Class::Accessor(3pm)

=item * DateTime(3pm)

=item * LWP::UserAgent(3pm)

=back

=head1 BUGS AND LIMITATIONS

Unknown.

=head1 AUTHOR

Copyright (C) 2013 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

This program is licensed under the same terms as Perl itself.