
package Paws::Net::EC2Caller;
  use Paws;
  use Moose::Role;
  use HTTP::Request::Common;
  use POSIX qw(strftime); 

  use Paws::Net::XMLResponse;

  has response_to_object => (
    is => 'ro',
    default => sub {
      Paws::Net::XMLResponse->new;
    }
  );

  sub array_flatten_string {
    my $self = shift;
    return ($self->flattened_arrays)?'%s.%d':'%s.member.%d';
  }

  # converts the objects that represent the call into parameters that the API can understand
  sub _to_querycaller_params {
    my ($self, $params) = @_;
    my %p;
    foreach my $att (grep { $_ !~ m/^_/ } $params->meta->get_attribute_list) {
      my $key;
      if ($params->meta->get_attribute($att)->does('Paws::API::Attribute::Trait::NameInRequest')){
        $key = $params->meta->get_attribute($att)->request_name;
      } else {
        $key = $att;
      }
      
      # This is due to code found in serialize.py (EC2Serializer)
      substr($key,0,1) = uc(substr($key,0,1));

      if (defined $params->$att) {
        my $att_type = $params->meta->get_attribute($att)->type_constraint;

        if (Paws->is_internal_type($att_type)) {
          if ($att_type eq 'Bool') {
            $p{ $key } = ($params->{$att} == 1) ? 'true' : 'false';
          } else {
            $p{ $key } = $params->{$att};
          }
        } elsif ($att_type =~ m/^ArrayRef\[(.*)\]/) {
          if (Paws->is_internal_type("$1")){
            my $i = 1;
            foreach my $value (@{ $params->$att }){
              $p{ sprintf($self->array_flatten_string, $key, $i) } = $value;
              $i++
            }
          } else {
            my $i = 1;
            foreach my $value (@{ $params->$att }){
              my %complex_value = $self->_to_querycaller_params($value);
              map { $p{ sprintf($self->array_flatten_string . ".%s", $key, $i, $_) } = $complex_value{$_} } keys %complex_value;
              $i++
            }
          }
        } else {
          my %complex_value = $self->_to_querycaller_params($params->$att);
          map { $p{ "$key.$_" } = $complex_value{$_} } keys %complex_value;
        }
      }
    }
    return %p;
  }

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

    $request->headers->content_type('application/x-www-form-urlencoded');
    my $url = URI->new('http:');
    $url->query_form($request->parameters);
    my $content = $url->query;
    # HTML/4.01 says that line breaks are represented as "CR LF" pairs (i.e., `%0D%0A')
    $content =~ s/(?<!%0D)%0A/%0D%0A/g if (defined $content);
    return $content;
  }

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

    my $request = Paws::Net::APIRequest->new();

    $request->url($self->_api_endpoint . '/');
    $request->uri('/');
    $request->method('POST');

    $request->parameters({ Action => $call->_api_call, 
                           Version   => $self->version,
                           $self->_to_querycaller_params($call) 
    });

    $request->content($self->generate_content_from_parameters($request));

    $self->sign($request);

    return $request;
  }
1;