#
# Copyright 2019 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::redis::cli::mode::memory;

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

use strict;
use warnings;

sub custom_usage_perfdata {
    my ($self, %options) = @_;
    
    $self->{output}->perfdata_add(label => $self->{result_values}->{label}, unit => 'B',
                                  value => $self->{result_values}->{used},
                                  warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning-' . $self->{result_values}->{label}, total => $self->{result_values}->{total}, cast_int => 1),
                                  critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical-' . $self->{result_values}->{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 = $self->{result_values}->{free} if (defined($self->{instance_mode}->{option_results}->{free}));
    if ($self->{instance_mode}->{option_results}->{units} eq '%') {
        $threshold_value = $self->{result_values}->{prct_used};
        $threshold_value = $self->{result_values}->{prct_free} if (defined($self->{instance_mode}->{option_results}->{free}));
    }
    $exit = $self->{perfdata}->threshold_check(value => $threshold_value, threshold => [ { label => 'critical-' . $self->{result_values}->{label}, exit_litteral => 'critical' }, { label => 'warning-' . $self->{result_values}->{label}, exit_litteral => 'warning' } ]);
    return $exit;
}

sub custom_usage_output {
    my ($self, %options) = @_;
    
    my ($total_used_value, $total_used_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{used});
    
    my $msg = sprintf($self->{result_values}->{display}.": %s (%.2f%%)",
                      $total_used_value . " " . $total_used_unit, $self->{result_values}->{prct_used});
    return $msg;
}

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

    $self->{result_values}->{display} = $options{new_datas}->{$self->{instance} . '_display'};
    $self->{result_values}->{label} = $options{new_datas}->{$self->{instance} . '_label'};
    $self->{result_values}->{used} = $options{new_datas}->{$self->{instance} . '_used'};
    $self->{result_values}->{total} = $options{new_datas}->{$self->{instance} . '_total'};
    $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};

    return 0;
}

sub set_counters {
    my ($self, %options) = @_;
    
    $self->{maps_counters_type} = [
        { name => 'used', type => 0 },
        { name => 'rss', type => 0, skipped_code => { -10 => 1 } },
        { name => 'peak', type => 0, skipped_code => { -10 => 1 } },
        { name => 'overhead', type => 0, skipped_code => { -10 => 1 } },
        { name => 'startup', type => 0, skipped_code => { -10 => 1 } },
        { name => 'dataset', type => 0, skipped_code => { -10 => 1 } },
        { name => 'lua', type => 0, skipped_code => { -10 => 1 } },
        { name => 'stats', type => 0, cb_prefix_output => 'prefix_stats_output', skipped_code => { -10 => 1 } },
    ];
    
    $self->{maps_counters}->{used} = [
        { label => 'used', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{rss} = [
        { label => 'rss', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{peak} = [
        { label => 'peak', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{overhead} = [
        { label => 'overhead', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{startup} = [
        { label => 'startup', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{dataset} = [
        { label => 'dataset', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{lua} = [
        { label => 'lua', set => {
                key_values => [ { name => 'display' }, { name => 'label' }, { name => 'used' }, { name => 'total' } ],
                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'),
            }
        },
    ];

    $self->{maps_counters}->{stats} = [
        { label => 'fragmentation-ratio', set => {
                key_values => [ { name => 'mem_fragmentation_ratio' } ],
                output_template => 'Fragmentation ratio: %s',
                perfdatas => [
                    { label => 'fragmentation_ratio', value => 'mem_fragmentation_ratio_absolute', template => '%s', min => 0 },
                ],
            },
        },
        { label => 'defrag-running', set => {
                key_values => [ { name => 'active_defrag_running' } ],
                output_template => 'Defragmentation running: %s',
                perfdatas => [
                    { label => 'defrag_running', value => 'active_defrag_running_absolute', template => '%s', min => 0 },
                ],
            },
        },
        { label => 'lazyfree-pending-objects', set => {
                key_values => [ { name => 'lazyfree_pending_objects' } ],
                output_template => 'Lazyfree pending objects: %s',
                perfdatas => [
                    { label => 'lazyfree_pending_objects', value => 'lazyfree_pending_objects_absolute', template => '%s', min => 0 },
                ],
            },
        },
    ];
}

sub prefix_stats_output {
    my ($self, %options) = @_;
    
    return "Statistics: ";
}

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 => {
        "units:s"   => { name => 'units', default => '%' },
        "free"      => { name => 'free' },
    });

    return $self;
}

my $metrics = {
    used_memory             => { label => 'used', display => 'Used' },
    used_memory_rss         => { label => 'rss', display => 'Rss' },
    used_memory_peak        => { label => 'peak', display => 'Peak' },
    used_memory_overhead    => { label => 'overhead', display => 'Overhead' },
    used_memory_startup     => { label => 'startup', display => 'Startup' },
    used_memory_dataset     => { label => 'dataset', display => 'Dataset' },
    used_memory_lua         => { label => 'lua', display => 'Lua' },
};

sub manage_selection {
    my ($self, %options) = @_;
    
    my $results = $options{custom}->get_info(); 
    foreach my $type (keys %$metrics) {
        next if (!defined($results->{$type}));
        $self->{$metrics->{$type}->{label}} = { display => $metrics->{$type}->{display},
                                                label   => $metrics->{$type}->{label},
                                                used    => $results->{$type},
                                                total   => $results->{total_system_memory} };
    }

    $self->{stats} = { 
        mem_fragmentation_ratio => $results->{mem_fragmentation_ratio},
        active_defrag_running => $results->{active_defrag_running},
        lazyfree_pending_objects => $results->{lazyfree_pending_objects},
    };
}

1;

__END__

=head1 MODE

Check memory utilization

=over 8

=item B<--units>

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

=item B<--free>

Thresholds are on free space left.

=item B<--warning-used>

Warning threshold for Used memory utilization

=item B<--critical-used>

Critical threshold for Used memory utilization

=item B<--warning-rss>

Warning threshold for Rss memory utilization

=item B<--critical-rss>

Critical threshold for Rss memory utilization

=item B<--warning-peak>

Warning threshold for Peak memory utilization

=item B<--critical-peak>

Critical threshold for Peak memory utilization

=item B<--warning-overhead>

Warning threshold for Overhead memory utilization

=item B<--critical-overhead>

Critical threshold for Overhead memory utilization

=item B<--warning-startup>

Warning threshold for Startup memory utilization

=item B<--critical-startup>

Critical threshold for Startup memory utilization

=item B<--warning-dataset>

Warning threshold for Dataset memory utilization

=item B<--critical-dataset>

Critical threshold for Dataset memory utilization

=item B<--warning-lua>

Warning threshold for Lua memory utilization

=item B<--critical-lua>

Critical threshold for Lua memory utilization

=item B<--warning-fragmentation-ratio>

Warning threshold for Fragmentation Ratio

=item B<--critical-fragmentation-ratio>

Critical threshold for Fragmentation Ratio

=item B<--warning-defrag-running>

Warning threshold for Running Defragmentation

=item B<--critical-defrag-running>

Critical threshold for Running Defragmentation

=item B<--warning-lazyfree-pending-objects>

Warning threshold for Lazyfree Pending Objects

=item B<--critical-lazyfree-pending-objects>

Critical threshold for Lazyfree Pending Objects

=back

=cut