#!/usr/bin/perl

use warnings;
use strict;

my $devs = {};
my @errs;
my @warn;
my @ok;

my @cmd = ('sudo', 'megactl', '-Hv', '2>&1');
my @output = `@cmd`;
if ($? != 0) {
	print "WARNING: Exec failed!\n";
	exit 2;
}

for my $line (@output) {
	if ($line =~ /^(\w+)\s+/) {
		my $dev = $1;
		my @line = split /\s+/, $line;
		$devs->{$dev}->{'header'} = \@line;
		next;
	}
}

sub check_controller {
	my $dev = shift;
	my ($err, $warn, $ok) = undef;
	$ok .= "$dev->{'header'}->[0]: ";
	for my $stat (@{$dev->{'header'}}) {
		if ($stat =~ /batt:(.*)/) {
			if ($1 ne 'good') {
				$warn .= "$dev->{'header'}->[0]: " unless $warn;
				$warn .= "Battery: $1 ";
			}
		}
	}
	$ok = "$dev->{'header'}->[0]: ok ";
	return ($ok, $err, $warn);
}

sub check_ld {
	my $dev = shift;
	my ($err, $warn, $ok) = undef;
	if ($dev->{'header'}->[5] ne 'online') {
		$err .= "$dev->{'header'}->[0]: $dev->{'header'}->[5]";
		return ($ok, $err, $warn);
	}
	$ok = "$dev->{'header'}->[0]: ok ";
	return ($ok, $err, $warn);
}

sub check_pd {
	my $dev = shift;
	my ($err, $warn, $ok) = undef;
	if ($dev->{'header'}->[5] ne 'online') {
		$err .= "$dev->{'header'}->[0]: $dev->{'header'}->[5]";
		return ($ok, $err, $warn);
	}
	for my $stat (@{$dev->{'header'}}) {
		if ($stat =~ /(^errs|media|other):/) {
			$warn .= "$dev->{'header'}->[0]: " unless $warn;
			$warn .= $stat . " ";
		}
	}
	$ok = "$dev->{'header'}->[0]: ok ";
	return ($ok, $err, $warn);
}

for my $dev (sort keys %$devs) {
	if ($dev =~ /^\w\d$/) {
		my ($ok, $err, $warn) = check_controller($devs->{$dev});
		push @errs, $err if $err;
		push @warn, $warn if $warn;
		push @ok, $ok if $ok;
	} elsif ($dev =~ /^\w\d\w\d$/) {
		my ($ok, $err, $warn) = check_ld($devs->{$dev});
		push @errs, $err if $err;
		push @warn, $warn if $warn;
		push @ok, $ok if $ok;
	} elsif ($dev =~ /^\w+\d+\w+\d+\w+\d+/) {
		my ($ok, $err, $warn) = check_pd($devs->{$dev});
		push @errs, $err if $err;
		push @warn, $warn if $warn;
		push @ok, $ok if $ok;
	}
}

if (@errs) {
	print "CRITICAL: ";
	print @errs;
	print "\n";
	exit 2;
} elsif (@warn) {
	print "WARNING: ";
	print @warn;
	print "\n";
	exit 1;
}
unless (@ok) {
	push @ok, "All devices OK";
}
print "OK: ";
print @ok;
print "\n";
exit 0;