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}

# Get a reply from a full chat
sub chat {
    my ($self, $chat, $temperature) = @_;
    
    if (ref($chat) ne 'ARRAY') {
        $self->{'error'} = 'chat method requires an arrayref';
        return undef;
    }

    $temperature = 1.0 unless $temperature;

    my $response = $http->post($url{$self->{'api'}}, {
         'headers' => {
             'Authorization' => 'Bearer ' . $self->{'key'},
             'Content-type'  => 'application/json'
         },
         content => encode_json {
             model          => $self->{'model'},
             messages       => [ @$chat ],
             temperature    => $temperature,
         }
     });
     if ($response->{'content'} =~ 'invalid_api_key') {
         croak 'Incorrect API Key - check your API Key is correct';
     }
     
     if ($self->{'debug'} and !$response->{'success'}) {
         croak $response if $self->{'debug'} eq 'verbose';
         croak $response->{'content'};
     }

     my $reply = decode_json($response->{'content'});
     
     return $reply->{'choices'}[0]->{'message'}->{'content'};
}


__END__

=head1 NAME

AI::Chat - Interact with AI Chat APIs

=head1 VERSION

Version 0.6 

=head1 SYNOPSIS

  use AI::Chat;

  my $chat  = AI::Chat->new(
      key   => 'your-api-key',
      api   => 'OpenAI',
      model => 'gpt-4o-mini',
  );

  my $reply = $chat->prompt("What is the meaning of life?");
  print $reply;

=head1 DESCRIPTION

This module provides a simple interface for interacting with AI Chat APIs,
currently supporting OpenAI.

The AI chat agent can be given a I<role> and then passed I<prompts>.  It will
reply to the prompts in natural language.  Being AI, the responses are
non-deterministic, that is, the same prompt will result in diferent responses
on different occasions.

Further control of the creativity of the responses is possible by specifying
at optional I<temperature> parameter.

=head1 API KEYS

A free OpenAI API can be obtained from L<https://platform.openai.com/account/api-keys>

=head1 MODELS

Although the API Key is free, each use incurs a cost.  This is dependent on the
number of tokens in the prompt and the reply.  Different models have different costs.
The default model C<gpt-4o-mini> is the lowest cost of the useful models and
is a good place to start using this module.  Previous versions of this module
defaulted to C<gpt-3.5-turbo-0125> but the current default is cheaper and
quicker. For most purposes, the default model should be used.

See also L<https://platform.openai.com/docs/models/overview>

=head1 METHODS

=head2 new

  my $chat = AI::Chat->new(%params);

Creates a new AI::Chat object.

=head3 Parameters

=over 4

=item key

C<required> Your API key for the chosen service.

=item api

The API to use (currently only 'OpenAI' is supported).

=item model

The language model to use (default: 'gpt-4o-mini').

See L<https://platform.openai.com/docs/models/overview>

=item role

The role to use for the bot in conversations.

This tells the bot what it's purpose when answering prompts.