#
# Copyright 2018 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 storage::netapp::restapi::mode::lunusage;

use base qw(centreon::plugins::templates::counter);

use strict;
use warnings;

my $instance_mode;

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

    my $extra_label = '';
    $extra_label = '_' . $self->{result_values}->{display} if (!defined($options{extra_instance}) || $options{extra_instance} != 0);
    
    $self->{output}->perfdata_add(label => 'used' . $extra_label,
                                  unit => 'B',
                                  value => $self->{result_values}->{used},
                                  warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning-' . $self->{label}, total => $self->{result_values}->{total}, cast_int => 1),
                                  critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical-' . $self->{label}, total => $self->{result_values}->{total}, cast_int => 1),
                                  min => 0, max => $self->{result_values}->{total});
}

sub custom_usage_threshold {
    my ($self, %options) = @_;
    
    my ($exit, $threshold_value);
    $threshold_value = $self->{result_values}->{used};
    $threshold_value = $self->{result_values}->{free} if (defined($instance_mode->{option_results}->{free}));
    if ($instance_mode->{option_results}->{units} eq '%') {
        $threshold_value = $self->{result_values}->{prct_used};
        $threshold_value = $self->{result_values}->{prct_free} if (defined($instance_mode->{option_results}->{free}));
    }
    $exit = $self->{perfdata}->threshold_check(value => $threshold_value,
                                               threshold => [ { label => 'critical-' . $self->{label}, exit_litteral => 'critical' },
                                                              { label => 'warning-' . $self->{label}, exit_litteral => 'warning' } ]);
    return $exit;
}

sub custom_usage_output {
    my ($self, %options) = @_;
    
    my ($used_value, $used_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{used});
    my ($free_value, $free_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{free});
    my ($total_value, $total_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{total});
    
    my $msg = sprintf("Total: %s Used: %s (%.2f%%) Free: %s (%.2f%%)", 
            $total_value . " " . $total_unit, 
            $used_value . " " . $used_unit, $self->{result_values}->{prct_used}, 
            $free_value . " " . $free_unit, $self->{result_values}->{prct_free});
    return $msg;
}

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

    $self->{result_values}->{display} = $options{new_datas}->{$self->{instance} . '_path'};
    $self->{result_values}->{total} = $options{new_datas}->{$self->{instance} . '_size'};
    $self->{result_values}->{used} = $options{new_datas}->{$self->{instance} . '_size_used'};

    if ($self->{result_values}->{total} != 0) {
        $self->{result_values}->{free} = $self->{result_values}->{total} - $self->{result_values}->{used};
        $self->{result_values}->{prct_used} = $self->{result_values}->{used} * 100 / $self->{result_values}->{total};
        $self->{result_values}->{prct_free} = 100 - $self->{result_values}->{prct_used};
    } else {
        $self->{result_values}->{free} = '0';
        $self->{result_values}->{prct_used} = '0';
        $self->{result_values}->{prct_free} = '0';
    }

    return 0;
}

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

    return "Lun '" . $options{instance_value}->{path} . "' ";
}

sub set_counters {
    my ($self, %options) = @_;
    
    $self->{maps_counters_type} = [
        { name => 'luns', type => 1, cb_prefix_output => 'prefix_output', message_multiple => 'All luns usage are ok' },
    ];
    
    $self->{maps_counters}->{luns} = [
        { label => 'usage', set => {
                key_values => [ { name => 'size_used' }, { name => 'size' }, { name => 'path' } ],
                closure_custom_calc => $self->can('custom_usage_calc'),
                closure_custom_output => $self->can('custom_usage_output'),
                closure_custom_perfdata => $self->can('custom_usage_perfdata'),
                closure_custom_threshold_check => $self->can('custom_usage_threshold'),
            }
        },
    ];
}

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 =>
                                {
                                    "filter-name:s"     => { name => 'filter_name' },
                                    "units:s"           => { name => 'units', default => '%' },
                                    "free"              => { name => 'free' },
                                });
   
    return $self;
}

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

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

    my $result = $options{custom}->get(path => '/luns');

    foreach my $lun (@{$result}) {
        if (defined($self->{option_results}->{filter_name}) && $self->{option_results}->{filter_name} ne '' &&
            $lun->{path} !~ /$self->{option_results}->{filter_name}/) {
            $self->{output}->output_add(long_msg => "skipping  '" . $lun->{path} . "': no matching filter name.", debug => 1);
            next;
        }

        $self->{luns}->{$lun->{key}} = {
            path => $lun->{path},
            size => $lun->{size},
            size_used => $lun->{size_used},
        }
    }

    if (scalar(keys %{$self->{luns}}) <= 0) {
        $self->{output}->add_option_msg(short_msg => "No entry found.");
        $self->{output}->option_exit();
    }
}

1;

__END__

=head1 MODE

Check NetApp luns usage.

=over 8

=item B<--filter-name>

Filter lun name (can be a regexp).

=item B<--warning-usage>

Threshold warning.

=item B<--critical-usage>

Threshold critical.

=item B<--units>

Units of thresholds (Default: '%') ('%', 'B').

=item B<--free>

Thresholds are on free space left.

=back

=cut