use strict;

package Seismic;

package Seismic::Station;
    use Moose;

    has 'Easting'       => (isa => 'Int', is => 'rw', required => 1);
    has 'Northing'      => (isa => 'Int', is => 'rw', required => 1);
    has 'Elevation'     => (isa => 'Int', is => 'rw', required => 1);
    has 'Id'            => (isa => 'Str', is => 'rw', required => 1);

package Seismic::Line;
    use Moose;
    use MooseX::AttributeHelpers;

    has 'Length'        => (isa => 'Int',              is => 'rw');
    has 'GroupInterval' => (isa => 'Int',              is => 'rw');
    has 'Id'            => (isa => 'Str',              is => 'rw', required => 1);
    has 'Stations'      => (
      metaclass => 'Collection::Hash',
      is        => 'rw',
      isa       => 'HashRef[Seismic::Station]',
      default   => sub { {} },
      provides  => {
        exists    => 'station_exists',
        keys      => 'station_ids',
        get       => 'get_station',
        set       => 'add_station',
        count     => 'count_stations',
        delete    => 'delete_station',
        clear     => 'delete_all_stations',
      },
    );

package Seismic::Grid;
    use Moose;

    has 'Lines'  => (
      metaclass => 'Collection::Hash',
      is        => 'rw',
      isa       => 'HashRef[Seismic::Line]',
      default   => sub { {} },
      provides  => {
        exists    => 'line_exists',
        keys      => 'line_ids',
        get       => 'get_line',
        set       => 'add_line',
        count     => 'count_lines',
        delete    => 'delete_line',
        clear     => 'delete_all_lines',
      },
    );

1;

##</code><code>##

use strict;

use Seismic;

my $grid = Seismic::Grid->new();

for my $line (1 .. 1000) {
    my $lineobject = Seismic::Line->new(
        {
            Id            => $line,
            Length        => int(1000 * rand(90)),
            GroupInterval => int( 100 * rand(90)),
        }
    );
    $grid->add_line($lineobject->Id, $lineobject);
    for my $station (1 .. 10) {
        my $stationobject = Seismic::Station->new(
            {
                Id          => $line . '_' . $station,
                Northing    => int(1e6 * rand(90)),
                Easting     => int(1e6 * rand(90)),
                Elevation   => int( 10 * rand(90)),
            }
        );
        $lineobject->add_station($stationobject->Id, $stationobject);
    }
}

print "line     station  position            elev.\n";
for my$line_id ($grid->line_ids) {
    my $line = $grid->get_line($line_id);
    for my $station_id ($line->station_ids) {
        my $station = $line->get_station($station_id);
        printf "%08d %-8s %08dN%08dW %4d\n",
            $line->Id,
            $station->Id,
            $station->Northing,
            $station->Easting,
            $station->Elevation;
    }
}

##</code><code>##

$grid->get_line(257)->get_station('257_5')->Elevation;