#!/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 $show_full_route = 0;

GetOptions(
	'h|help'       => sub { show_help(0) },
	'f|full-route' => \$show_full_route,
	'l|line=s@'    => \@grep_lines,
	'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(
	name        => $stop_name,
	full_routes => $show_full_route
);

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

	print "Usage: aseag-m <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 ($show_full_route) {
			print "\n" . $line->[3] . "\n\n\n";
		}
	}

	return;
}

sub show_results {
	my @output;

	for my $d ( $status->results ) {

		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 1.04

=head1 DESCRIPTION

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

=head1 OPTIONS

=over

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

Display complete routes (including arrival times) of all buses.

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

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

=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.