#
# Copyright 2022 Centreon (http://www.centreon.com/)
#
# Centreon is a full-fledged industry-strength solution that meets
# the needs in IT infrastructure and application monitoring for
# service performance.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

package apps::monitoring::alyvix::restapi::custom::api;

use strict;
use warnings;
use centreon::plugins::http;
use JSON::XS;

sub new {
    my ($class, %options) = @_;
    my $self  = {};
    bless $self, $class;

    if (!defined($options{output})) {
        print "Class Custom: Need to specify 'output' argument.\n";
        exit 3;
    }
    if (!defined($options{options})) {
        $options{output}->add_option_msg(short_msg => "Class Custom: Need to specify 'options' argument.");
        $options{output}->option_exit();
    }
    
    if (!defined($options{noptions})) {
        $options{options}->add_options(arguments =>  {
            'hostname:s'             => { name => 'hostname' },
            'url-path:s'             => { name => 'url_path' },
            'port:s'                 => { name => 'port' },
            'proto:s'                => { name => 'proto' },
            'api-username:s'         => { name => 'api_username' },
            'api-password:s'         => { name => 'api_password' },
            'timeout:s'              => { name => 'timeout' },
            'unknown-http-status:s'  => { name => 'unknown_http_status' },
            'warning-http-status:s'  => { name => 'warning_http_status' },
            'critical-http-status:s' => { name => 'critical_http_status' }
        });
    }
    $options{options}->add_help(package => __PACKAGE__, sections => 'REST API OPTIONS', once => 1);

    $self->{output} = $options{output};
    $self->{http} = centreon::plugins::http->new(%options);

    return $self;
}

sub set_options {
    my ($self, %options) = @_;

    $self->{option_results} = $options{option_results};
}

sub set_defaults {}

sub check_options {
    my ($self, %options) = @_;

    $self->{hostname} = (defined($self->{option_results}->{hostname})) ? $self->{option_results}->{hostname} : '';
    $self->{port} = (defined($self->{option_results}->{port})) ? $self->{option_results}->{port} : 80;
    $self->{proto} = (defined($self->{option_results}->{proto})) ? $self->{option_results}->{proto} : 'http';
    $self->{url_path} = (defined($self->{option_results}->{url_path})) ? $self->{option_results}->{url_path} : '/v0/';
    $self->{timeout} = (defined($self->{option_results}->{timeout}) && $self->{option_results}->{timeout} =~ /^(\d+)$/) ? $1 : 30;
    $self->{api_username} = (defined($self->{option_results}->{api_username})) ? $self->{option_results}->{api_username} : undef;
    $self->{api_password} = (defined($self->{option_results}->{api_password})) ? $self->{option_results}->{api_password} : undef;
    $self->{unknown_http_status} = (defined($self->{option_results}->{unknown_http_status})) ? $self->{option_results}->{unknown_status} : '%{http_code} < 200 or %{http_code} >= 300';
    $self->{warning_http_status} = (defined($self->{option_results}->{warning_http_status})) ? $self->{option_results}->{warning_status} : '';
    $self->{critical_http_status} = (defined($self->{option_results}->{critical_http_status})) ? $self->{option_results}->{critical_status} : '';

    if ($self->{hostname} eq '') {
        $self->{output}->add_option_msg(short_msg => 'Need to specify hostname option.');
        $self->{output}->option_exit();
    }

    return 0;
}

sub settings {
    my ($self, %options) = @_;

    $self->{http}->add_header(key => 'Content-Type', value => 'application/json');
    $self->{http}->set_options(%{$self->{option_results}});
}

sub get_connection_info {
    my ($self, %options) = @_;

    return $self->{hostname} . ":" . $self->{port};
}

sub get_hostname {
    my ($self, %options) = @_;

    return $self->{hostname};
}

sub get_port {
    my ($self, %options) = @_;

    return $self->{port};
}

sub json_decode {
    my ($self, %options) = @_;

    my $decoded;
    eval {
        $decoded = JSON::XS->new->utf8->decode($options{content});
    };

    if ($@) {
        $self->{output}->add_option_msg(short_msg => "Cannot decode json response: $@");
        $self->{output}->option_exit();
    }

    return $decoded;
}

sub request_api {
    my ($self, %options) = @_;

    $self->settings();
    my ($content) = $self->{http}->request(
        url_path => $self->{url_path} . $options{endpoint},
        unknown_status => $self->{unknown_http_status},
        warning_status => $self->{warning_http_status},
        critical_status => $self->{critical_http_status}
    );

    my $decoded = $self->json_decode(content => $content);
    return $decoded;
}

1;

__END__

=head1 NAME

Alyvix Server Rest API.

=head1 SYNOPSIS

Alyvix Rest API custom mode.

=head1 REST API OPTIONS

Alyvix Server Rest API.

=over 8

=item B<--hostname>

Alyvix Server hostname.

=item B<--url-path>

API url path (Default: '/v0/')

=item B<--port>

API port (Default: 80)

=item B<--proto>

Specify https if needed (Default: 'http')

=item B<--credentials>

Specify this option if you access the API with authentication

=item B<--username>

Specify username for authentication (Mandatory if --credentials is specified)

=item B<--password>

Specify password for authentication (Mandatory if --credentials is specified)

=item B<--basic>

Specify this option if you access the API over basic authentication and don't want a '401 UNAUTHORIZED' error to be logged on your webserver.

Specify this option if you access the API over hidden basic authentication or you'll get a '404 NOT FOUND' error.

(Use with --credentials)

=item B<--timeout>

Set HTTP timeout

=back

=head1 DESCRIPTION

B<custom>.

=cut