package WebService::TFL::Bus;
use Moose;
use Moose::Util::TypeConstraints;
use MooseX::Types::URI 'Uri';
use WebService::TFL::Bus::Response;
use namespace::autoclean;

has user_agent => (
    isa => duck_type(['get']),
    is => 'ro',
    lazy_build => 1,
);
sub _build_user_agent {
    require LWP::UserAgent;
    my $ua = LWP::UserAgent->new();
    $ua->env_proxy;
    return $ua;
}

has uri => (
    isa => Uri,
    is => 'ro',
    coerce => 1,
    default => 'http://countdown.api.tfl.gov.uk/interfaces/ura/instant_V1',
);

sub request {
    my ($self,$request) = @_;

    my $http_response = $self->user_agent->get(
        $request->request_uri($self->uri)
    );
    if ($http_response->is_success) {
        my $json = $http_response->content;

        return WebService::TFL::Bus::Response->new_from_json(
            $request->ReturnList,
            $json
        );
    }
    else {
        die $http_response->status_line;
    }
}

1;