#!/usr/bin/perl
# IBM(c) 2016 EPL license http://www.eclipse.org/legal/epl-v10.html

#--------------------------------------------------------
#This is a template for developing a new probe sub_command. Especially in hierarchical environment.
#This template mainly implement the sub_comamd dispatch in hierarchical structure and basic framework of a new sub_comamd.
#Developer only need to focus on main probe job (by implement do_main_job function) and friendly output (by implement summary_all_jobs_output function) for user.
#This template can also be used in flat structure. but if developer think it's too heavy in flat, it's fine to develop sub command directly.
#But in hierarchical structure, we strongly recommand using this template.
#
#The main dispatch policy are:
#1. if there isn't noderange input from commmand line and  there are service nodes defined in current MN,
#   dispatch exact same command input from STDIN to all SNs and current MN. if there isn't service nodes defined,
#   just hanld command input from STDIN in current MN
#2. If there is noderange input from command line by opion "-n", we will dispatch the command input from STDIN to SN which can hanle these ndoes
#   For example, if we got command from STDIN like "probecommand -n test[1-15] -V" and test[1-5] 's SN is SN1, test[6-10]'s SN is SN2
#   The dispatch result will be:
#   For MN run:  probecommand -n test[11-15] -V
#   For SN1 run: probecommand -n test[1-5] -V
#   For SN2 run: probecommand -n test[6-10] -V
#3. All the return message from SNs and MN will be saved in hash %summaryoutput, develper can use it when implement summary_all_jobs_output function
#--------------------------------------------------------

BEGIN { $::XCATROOT = $ENV{'XCATROOT'} ? $ENV{'XCATROOT'} : -d '/opt/xcat' ? '/opt/xcat' : '/usr'; }

use lib "$::XCATROOT/probe/lib/perl";
use probe_utils;
use hierarchy;
use File::Basename;
use Data::Dumper;
use Getopt::Long qw(:config no_ignore_case);


my $help      = 0;    #command line attribute '-h', get usage information
my $test      = 0;    #command line attribute '-T'
my $hierarchy = 0;
my $verbose   = 0;    #command line attribute '-V'
my $noderange;        #command line attribute '-n'
my $output = "stdout"; #used by probe_utils->send_msg("$output", "o", "xxxxxxxxxx"); print output to STDOUT
my $is_sn  = 0;        #flag current server is SN
my $rst    = 0;        #the exit code of current command
my $terminal = 0;      #means get INT signal from STDIN

#save all output from commands running on SNs and MN
# one example:
# $summaryoutput{mn} = @mn_output_history
# $summaryoutput{SN1} = @SN1_output_history
my %summaryoutput;

my $is_sn;
$is_sn = 1 if (-e "/etc/xCATSN");

#-------------------------------------
#            Usage
#-------------------------------------
# below are some options rules used by default
#     -h : Get usage information of current sub command
#     -V : Output more information for debug
#     -T : To verify if $program_name can work, reserve option for probe framework, dosen't use by customer
#     -n : In xCAT probe, -n is uesd to specify node range uniformly
#-------------------------------------
my $program_name = basename("$0");    #current sub_command name
$::USAGE = "Usage:
    $program_name -h
    $program_name [-V]

Description:
    This is a template for developing a probe sub_command.
    <# ADD DESCRIPTION FOR YOUR COMMAND #>

Options:
    -h : Get usage information of $program_name
    -V : Output more information for debug
";

#------------------------------------
# Please implement the main job of current command in do_main_job function
# Recommand to use probe_utils->send_msg() to handle message you plan to print out to STDOUT
# A simple example has been written in funciton.
#------------------------------------
sub do_main_job {
    my $rst = 0;

    probe_utils->send_msg("$output", "o", "Received node range:  $noderange");

    #<#DO YOUR OWN JOB1#>
    probe_utils->send_msg("$output", "o", "Do the first job");

    #<#DO YOUR OWN JOB2#>
    probe_utils->send_msg("$output", "f", "Do the second job");

    return $rst;
}

#-------------------------------------
# When this command return from all SNs and MN, you need to generate a summary
# All history outpout from SNs and MN are saved in globle hash %summaryoutput.
# $summaryoutput{mn} = @mnhistory
# $summaryoutput{snname1} = @snname1history;
# The entry in each histroy array isn't categorized, the message coming early is arranged before the one coming later.
# A simple example of how to dump %summaryoutput has been written in function
#-------------------------------------
sub summary_all_jobs_output {
    my $rst = 0;

    #DO SUMMARY DEPENDING ON YOUR SUB_COMMAND NEED
    probe_utils->send_msg("$output", "d", "======================do summary=====================");

    #print "summaryoutput:\n";
    #print Dumper \%summaryoutput;

    foreach my $sn (keys %summaryoutput) {
        probe_utils->send_msg("$output", "d", "[$sn]");
        foreach my $log (@{ $summaryoutput{$sn} }) {
            probe_utils->send_msg("$output", "d", "\t$log");
        }
    }
    return $rst;
}

#-------------------------------------
#            main process
#-------------------------------------
my @tmpargv = @ARGV;
if (
    !GetOptions("--help|h" => \$help,
        "T"   => \$test,
        "H"   => \$hierarchy,
        "n=s" => \$noderange,
        "V"   => \$verbose))
{
    probe_utils->send_msg("$output", "f", "Invalid parameter for $program_name");
    probe_utils->send_msg("$output", "d", "$::USAGE");
    exit 1;
}

if ($help) {
    if ($output ne "stdout") {
        probe_utils->send_msg("$output", "d", "$::USAGE");
    } else {
        print "$::USAGE";
    }
    exit 0;
}

if ($test) {
    probe_utils->send_msg("$output", "o", "This isn't a probe tool, this is just a template for sub command coding. Using it to develop sub command which need to cover hierarchical cluster");
    exit 0;
}

#Handle the interrupt signal from STDIN
$SIG{TERM} = $SIG{INT} = sub {
    $terminal = 1;
};

#if it is called by hierarchy template, just run job, not to do dispatch
if ($hierarchy || $is_sn) {
    $rst = do_main_job();
    exit $rst;
}

my $hierarchy_instance = hierarchy->new();

#-------starting to dispatch_cmd--------
my @error;
$rst = $hierarchy_instance->dispatch_cmd($noderange, \@tmpargv, \@error);
if ($rst) {
    probe_utils->send_msg("$output", "f", "Calculate dispatch command failed");
    foreach (@error) {
        probe_utils->send_msg("$output", "", "$_");
    }
    if ($hierarchy_instance->destory(\@error)) {
        probe_utils->send_msg("$output", "", "$_") foreach (@error);
    }
    exit $rst;
}

#----------start to read reply-------
my %reply_cache;
while ($hierarchy_instance->read_reply(\%reply_cache)) {
    foreach my $servers (keys %reply_cache) { #Dispatch_cmd may use SN range to dispatch cms to SNs at one time
        my @server_array = split(",", $servers);
        foreach my $server (@server_array) {
            foreach (@{ $reply_cache{$servers} }) {
                my $msg    = "";
                my $logmsg = "";

                #For cases like below:
                #c910f02c04p04: [ok]     :All xCAT deamons are running
                if ($reply_cache{$servers}->[$_] =~ /^(\w+)\s*:\s*(\[\w+\]\s*):\s*(.*)/) {
                    if ("$1" eq "$server") {
                        $logmsg = "$2: $3";
                        $msg    = "$2:<$server>: $3";
                    }

                    #For cases like below:
                    #c910f02c04p05: IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
                } elsif ($reply_cache{$servers}->[$_] =~ /^(\w+)\s*:\s*(.*)/) {
                    if ("$1" eq "$server") {
                        $logmsg = "$2";
                        $msg    = "<$server>: $2";
                    }

                    #For cases like below:
                    #Unable to open socket connection to xcatd daemon on localhost:3001.
                } else {
                    if (length($reply_cache{$servers}->[$_])) {
                        $logmsg = $reply_cache{$servers}->[$_];
                        $msg = "[failed] :[$server]: $reply_cache{$servers}->[$_]";
                    }
                }
                probe_utils->send_msg("$output", "", "$msg") if (length($msg));
                push @{ $summaryoutput{$server} }, $logmsg if (length($logmsg));
            }
        }
    }
    if ($terminal) {
        last;
    }
}

#----------hierarchy_instance->destory-----------
if ($hierarchy_instance->destory(\@error)) {
    probe_utils->send_msg("$output", "", "$_") foreach (@error);
}

#-------------------------------------
# summary all jobs output to display
#-------------------------------------
$rst = summary_all_jobs_output();

exit $rst;