#
# Copyright 2017 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 database::mssql::mode::transactions;

use base qw(centreon::plugins::mode);

use strict;
use warnings;
use centreon::plugins::statefile;

sub new {
    my ($class, %options) = @_;
    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
    bless $self, $class;
    
    $self->{version} = '1.0';
    $options{options}->add_options(arguments =>
                                { 
                                  "warning:s"               => { name => 'warning', },
                                  "critical:s"              => { name => 'critical', },
                                });
	$self->{statefile_cache} = centreon::plugins::statefile->new(%options);
    return $self;
}

sub check_options {
    my ($self, %options) = @_;
    $self->SUPER::init(%options);

    if (($self->{perfdata}->threshold_validate(label => 'warning', value => $self->{option_results}->{warning})) == 0) {
       $self->{output}->add_option_msg(short_msg => "Wrong warning threshold '" . $self->{option_results}->{warning} . "'.");
       $self->{output}->option_exit();
    }
    if (($self->{perfdata}->threshold_validate(label => 'critical', value => $self->{option_results}->{critical})) == 0) {
       $self->{output}->add_option_msg(short_msg => "Wrong critical threshold '" . $self->{option_results}->{critical} . "'.");
       $self->{output}->option_exit();
    }
	$self->{statefile_cache}->check_options(%options);
}

sub run {
    my ($self, %options) = @_;
    # $options{sql} = sqlmode object
    $self->{sql} = $options{sql};

    $self->{sql}->connect();
    $self->{sql}->query(query => q{SELECT cntr_value FROM sys.dm_os_performance_counters WHERE counter_name = 'transactions/sec' AND instance_name = '_Total'});
    my $transactions = $self->{sql}->fetchrow_array();

	$self->{statefile_cache}->read(statefile => 'mssql_' . $self->{mode} . '_' . $self->{sql}->get_unique_id4save());
    sleep 1;

	my $old_timestamp = $self->{statefile_cache}->get(name => 'last_timestamp');
	my $old_transactions = $self->{statefile_cache}->get(name => 'transactions');

	my $new_datas = {};
	$new_datas->{last_timestamp} = time();
	$new_datas->{transactions} = $transactions;

	$self->{statefile_cache}->write(data => $new_datas);
	if (!defined($old_timestamp) || !defined($old_transactions)) {
		$self->{output}->output_add(severity => 'OK',
									short_msg => "Buffer creation...");
		$self->{output}->display();
		$self->{output}->exit();
	}
	my $delta_time = $new_datas->{last_timestamp} - $old_timestamp;
	$delta_time = 1 if ($delta_time == 0);

    my $transactionsPerSec = ($transactions - $old_transactions) / $delta_time ;

    my $exit_code = $self->{perfdata}->threshold_check(value => $transactionsPerSec, threshold => [ { label => 'critical', 'exit_litteral' => 'critical' }, { label => 'warning', exit_litteral => 'warning' } ]);
    $self->{output}->output_add(severity => $exit_code,
                                  short_msg => sprintf("%.2f transactions/s.", $transactionsPerSec));
    $self->{output}->perfdata_add(label => 'transactions',
                                  value => sprintf("%.2f", $transactionsPerSec),
                                  unit => '/s',
                                  warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning'),
                                  critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical'),
                                  min => 0);

    $self->{output}->display();
    $self->{output}->exit();
}

1;

__END__

=head1 MODE

Check MSSQL transactions per second.

=over 8

=item B<--warning>

Threshold warning.

=item B<--critical>

Threshold critical.

=back

=cut