#
# Copyright 2016 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::voip::asterisk::remote::mode::showpeers;

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

use strict;
use warnings;
use centreon::plugins::misc;
use apps::voip::asterisk::remote::lib::ami;

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 =>
                                {
                                  "hostname:s"        => { name => 'hostname' },
                                  "port:s"            => { name => 'port', default => 5038 },
                                  "username:s"        => { name => 'username' },
                                  "password:s"        => { name => 'password' },
                                  "remote:s"          => { name => 'remote', default => 'ssh' },
                                  "ssh-option:s@"     => { name => 'ssh_option' },
                                  "ssh-path:s"        => { name => 'ssh_path' },
                                  "ssh-command:s"     => { name => 'ssh_command', default => 'ssh' },
                                  "timeout:s"         => { name => 'timeout', default => 30 },
                                  "command:s"         => { name => 'command', default => 'asterisk_sendcommand.pm' },
                                  "command-path:s"    => { name => 'command_path', default => '/home/centreon/bin' },
                                  "protocol:s"        => { name => 'protocol', },
                                  "filter-name:s"     => { name => 'filter_name', },
                                  "warning:s"         => { name => 'warning', },
                                  "critical:s"        => { name => 'critical', },
                                });
    $self->{result} = {};
    return $self;
}

sub check_options {
    my ($self, %options) = @_;
    $self->SUPER::init(%options);
    
    if (!defined($self->{option_results}->{hostname})) {
        $self->{output}->add_option_msg(short_msg => "Please set the --hostname option");
        $self->{output}->option_exit();
    }

    if ($self->{option_results}->{remote} eq 'ami')
    {
    	if (!defined($self->{option_results}->{username})) {
	        $self->{output}->add_option_msg(short_msg => "Please set the --username option");
	        $self->{output}->option_exit();
	    }
	
	    if (!defined($self->{option_results}->{password})) {
	        $self->{output}->add_option_msg(short_msg => "Please set the --password option");
	        $self->{output}->option_exit();
	    }
    }

    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();
    }
}

sub manage_selection {
    my ($self, %options) = @_;
    my @result;
    
    if ($self->{option_results}->{protocol} eq 'sip' || $self->{option_results}->{protocol} eq 'SIP')
    {
    	$self->{asterisk_command} = 'sip show peers';
    }
    elsif ($self->{option_results}->{protocol} eq 'iax' || $self->{option_results}->{protocol} eq 'IAX')
    {
    	$self->{asterisk_command} = 'iax2 show peers';
    }
    
    if ($self->{option_results}->{remote} eq 'ami')
    {
    	apps::voip::asterisk::remote::lib::ami::connect($self);
        @result = apps::voip::asterisk::remote::lib::ami::action($self);
        apps::voip::asterisk::remote::lib::ami::quit();
    }
    else
    {
    	my $stdout = centreon::plugins::misc::execute(output => $self->{output},
                                                  options => $self->{option_results},
                                                  command => $self->{option_results}->{command},
                                                  command_path => $self->{option_results}->{command_path},
                                                  command_options => "'".$self->{asterisk_command}."'",
                                                  );
        @result = split /\n/, $stdout;
    }

    # Compute data
    foreach my $line (@result) {
        if ($line =~ /^([\w\-\/]*) *\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} .* (OK) \((.*) (.*)\)/)
        {
	        my ($trunkname, $trunkstatus, $trunkvalue, $trunkunit) = ($1, $2, $3, $4);
	
	        if (defined($self->{option_results}->{filter_name}) && $self->{option_results}->{filter_name} ne '' &&
	            $trunkname !~ /$self->{option_results}->{filter_name}/)
	        {
	            $self->{output}->output_add(long_msg => "Skipping trunk '" . $trunkname . "': no matching filter name");
	            next;
	        }
	        
	        $self->{result}->{$trunkname} = {name => $trunkname, status => 'OK',
	        	                             realstatus => $trunkstatus,
	        	                             value => $trunkvalue,
	        	                             unit => $trunkunit};
        }
        elsif ($line =~ /^([\w\-\/]*) *\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3} .* (Unreachable)/)
        {
        	my ($trunkname, $trunkstatus) = ($1, $2);
        	$self->{result}->{$trunkname} = {name => $trunkname, status => 'CRITICAL', realstatus => $trunkstatus};
        }
        elsif ($line =~ /^Unable to connect .*/)
        {
        	$self->{result}->{$line} = {name => $line, status => 'CRITICAL', realstatus => 'Unreachable'};
        }
    }
}

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

    my $msg;
    my $old_status = 'ok';

    $self->manage_selection();
    
    # Send formated data to Centreon
    if (scalar keys %{$self->{result}} >= 1)
    {
    	$self->{output}->output_add(severity => 'OK',
                                short_msg => 'Everything is OK');
    }
    else
    {
    	$self->{output}->output_add(severity => 'Unknown',
                                short_msg => 'Nothing to be monitored');
    }

    foreach my $name (sort(keys %{$self->{result}})) {
        if (defined($self->{result}->{$name}->{value}) && defined($self->{result}->{$name}->{unit}))
        {
        	$self->{result}->{$name}->{status} = $self->{perfdata}->threshold_check(value => $self->{result}->{$name}->{value}, 
                                                               threshold => [{ label => 'critical', exit_litteral => 'critical' },
                                                               	             { label => 'warning', exit_litteral => 'warning' }]);
        	$self->{output}->perfdata_add(label => $self->{result}->{$name}->{name},
                                          value => $self->{result}->{$name}->{value}.$self->{result}->{$name}->{unit},
                                          warning => $self->{perfdata}->get_perfdata_for_output(label => 'warning'),
                                          critical => $self->{perfdata}->get_perfdata_for_output(label => 'critical'),
                                          min => 0);
        }
        
        if (!$self->{output}->is_status(value => $self->{result}->{$name}->{status}, compare => 'ok', litteral => 1))
        {
            $msg = sprintf("Trunk: %s", $self->{result}->{$name}->{name});
            $self->{output}->output_add(severity => $self->{result}->{$name}->{status},
                                        short_msg => $msg);
            if ($self->{result}->{$name}->{realstatus} eq 'Unreachable')
            {
            	$self->{output}->output_add(long_msg => sprintf("%s : %s", $self->{result}->{$name}->{name}, $self->{result}->{$name}->{realstatus}));
            }
            else
            {
            	$self->{output}->output_add(long_msg => sprintf("%s : %s", $self->{result}->{$name}->{name}, $self->{result}->{$name}->{value}));
            }
        }
    }

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

1;

__END__

=head1 MODE

Show peers for different protocols.

=over 8

=item B<--warning>

Threshold warning.

=item B<--critical>

Threshold critical.

=item B<--remote>

Execute command remotely; can be 'ami' or 'ssh' (default: ssh).

=item B<--hostname>

Hostname to query (need --remote option).

=item B<--port>

AMI remote port (default: 5038).

=item B<--username>

AMI username.

=item B<--password>

AMI password.

=item B<--ssh-option>

Specify multiple options like the user (example: --ssh-option='-l=centreon-engine' --ssh-option='-p=52').

=item B<--ssh-path>

Specify ssh command path (default: none)

=item B<--ssh-command>

Specify ssh command (default: 'ssh'). Useful to use 'plink'.

=item B<--timeout>

Timeout in seconds for the command (Default: 30).

=item B<--command>

Command to get information (Default: 'asterisk_sendcommand.pm').
Can be changed if you have output in a file.

=item B<--command-path>

Command path (Default: /home/centreon/bin).

=item B<--filter-name>

Filter on trunkname (regexp can be used).

=item B<--protocol>

show peer for the choosen protocol (sip or iax).

=back

=cut