package Travel::Status::DE::DeutscheBahn;

use strict;
use warnings;
use 5.010;

use Carp qw(confess);
use LWP::UserAgent;
use POSIX qw(strftime);
use Travel::Status::DE::DeutscheBahn::Departure;
use XML::LibXML;

our $VERSION = '0.0';

sub new {
	my ( $obj, %conf ) = @_;
	my $date = strftime( '%d.%m.%Y', localtime(time) );
	my $time = strftime( '%H:%M',    localtime(time) );

	my $ua = LWP::UserAgent->new();

	if ( not $conf{station} ) {
		confess('You need to specify a station');
	}

	my $ref = {
		post => {
			input          => $conf{station},
			inputRef       => q{#},
			date           => $conf{date} || $date,
			time           => $conf{time} || $time,
			productsFilter => '1111101000000000',
			REQTrain_name  => q{},
			maxJourneys    => 20,
			delayedJourney => undef,
			start          => 'Suchen',
			boardType      => 'Abfahrt',
			ao             => 'yes',
		},
	};

	$ref->{html}
	  = $ua->post( 'http://mobile.bahn.de/bin/mobil/bhftafel.exe/dn?rt=1',
		$ref->{post} )->content();

	$ref->{tree} = XML::LibXML->load_html(
		string            => $ref->{html},
		recover           => 2,
		suppress_errors   => 1,
		suppress_warnings => 1,
	);

	return bless( $ref, $obj );
}

sub departures {
	my ($self) = @_;

	my $xp_element = XML::LibXML::XPathExpression->new(
		'//table[@class="result stboard dep"]/tr');
	my $xp_time  = XML::LibXML::XPathExpression->new('./td[@class="time"]');
	my $xp_train = XML::LibXML::XPathExpression->new('./td[@class="train"]');
	my $xp_route = XML::LibXML::XPathExpression->new('./td[@class="route"]');
	my $xp_dest  = XML::LibXML::XPathExpression->new('./td[@class="route"]//a');
	my $xp_platform
	  = XML::LibXML::XPathExpression->new('./td[@class="platform"]');
	my $xp_info = XML::LibXML::XPathExpression->new('./td[@class="ris"]');

	my $re_via = qr{
		^ \s* (.+?) \s* \n
		\d{1,2}:\d{1,2}
	}mx;

	for my $tr ( @{ $self->{tree}->findnodes($xp_element) } ) {

		my ($n_time) = $tr->findnodes($xp_time);
		my ( undef, $n_train ) = $tr->findnodes($xp_train);
		my ($n_route)    = $tr->findnodes($xp_route);
		my ($n_dest)     = $tr->findnodes($xp_dest);
		my ($n_platform) = $tr->findnodes($xp_platform);
		my ($n_info)     = $tr->findnodes($xp_info);
		my $first        = 1;

		if ( not( $n_time and $n_dest ) ) {
			next;
		}

		my $time     = $n_time->textContent();
		my $train    = $n_train->textContent();
		my $route    = $n_route->textContent();
		my $dest     = $n_dest->textContent();
		my $platform = $n_platform->textContent();
		my $info     = $n_info->textContent();
		my @via;

		for my $str ( $time, $train, $dest, $platform, $info ) {
			$str =~ s/\n//mg;
			$str =~ tr/ //s;
		}

		$info =~ s/,Grund//;

		while ( $route =~ m{$re_via}g ) {
			if ($first) {
				$first = 0;
				next;
			}
			my $stop = $1;
			push( @via, $stop );
		}

		push(
			@{ $self->{departures} },
			Travel::Status::DE::DeutscheBahn::Departure->new(
				time        => $time,
				train       => $train,
				route_raw   => $route,
				route       => \@via,
				destination => $dest,
				platform    => $platform,
				info        => $info,
			)
		);
	}

	return @{ $self->{departures} };
}

1;

__END__

=head1 NAME

Travel::Status::DE::DeutscheBahn - Interface to the DeutscheBahn online
departure monitor

=head1 SYNOPSIS

=head1 VERSION

version 0.0

=head1 DESCRIPTION

=head1 METHODS

=over

=back

=head1 DIAGNOSTICS

=head1 DEPENDENCIES

=over

=back

=head1 BUGS AND LIMITATIONS

=head1 SEE ALSO

=head1 AUTHOR

Copyright (C) 2011 by Daniel Friesel E<lt>derf@finalrewind.orgE<gt>

=head1 LICENSE

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