#!/usr/bin/env perl
use strict;
use warnings;
use URI::Amazon::APA;
use XML::LibXML;
use XML::LibXML::XPathContext;

my $key = $ENV{AWS_KEY} || "YOURKEYHERE";
my $secret = $ENV{AWS_SECRET} || "youforgottoputyourownsecretin";
my $asscociate = $ENV{AWS_ASSOC} || "this-isnt-it-20";

my $title = shift || die "You must provide a search string";
my $mode = shift || die "You must provide a mode, e.g., Books";

my $uri = URI::Amazon::APA->new("http://ecs.amazonaws.com/onca/xml");

$uri->query_form(
                 Service       => "AWSECommerceService",
                 Operation     => "ItemSearch",
                 ResponseGroup => "Large",
                 AssociateTag  => $asscociate,
                 Title         => $title,
                 SearchIndex   => $mode,
                );

$uri->sign( key => $key,
            secret => $secret );

my $doc = XML::LibXML->load_xml( location => $uri );
my $xc = XML::LibXML::XPathContext->new($doc);
$xc->registerNs('amzn', $doc->getDocumentElement->namespaceURI);

if ( my @error = $xc->findnodes('//amzn:Error') )
{
    die join("\n", map { $_->textContent } @error ), $/;
}

for my $item ( $xc->findnodes('//amzn:ItemAttributes/amzn:Title/text()') )
{
    print $item->nodeValue, $/;
}

# print $doc->serialize(1);