#!/usr/bin/env perl

package Net::WHMCS::Integration::OSX;

use strict;
use warnings;

no warnings qw/experimental/;
use v5.14;
use Digest::MD5 qw/md5_hex/;
use HTTP::Date;
use JSON::PP;
use LWP::UserAgent;
use Maff::Common::OSX qw/nc_notify/;
use Maff::Common::Time qw/relative_time/;

# Configuration
our $username = "";
our $password = "";
our $apitoken = "";
$password = md5_hex $password;

my $whmcsinstall = "";
my $endpoint = "$whmcsinstall/includes/api.php";
my $maxsubjlen = 32;
my $knownpath = "$ENV{HOME}/.tnotifyd_known";

my $whmcs;

sub readknown {
	open my $kn, "<$knownpath";
	my $json = <$kn>;
	$json = decode_json $json;
	close $kn;
	return $json;
}
sub writeknown {
	open my $kn, ">$knownpath";
	my $json = JSON::PP->new->encode(@_);
	print $kn $json;
	close $kn;
}
sub known {
	my $k = readknown;
	my ($id,$ts) = @_;
	return 1 if defined $k->{$id} and $k->{$id} == $ts;
	$k->{$id}=$ts;
	writeknown $k;
	return 0;
}
sub fetchWaitingTickets {
	my %pfields = (
		"username"	=>		$username,
		"password"	=>		$password,
		"accesskey"	=>		$apitoken,
		"action"	=>		"gettickets",
		"status"	=>		"Awaiting Reply",
		#"status"	=>		"All Active Tickets",
		"limitnum"	=>		50,
		"responsetype"	=>	"json",
	);
	my $lwp = new LWP::UserAgent(timeout => 100);
	$lwp->agent('perl/whmcs-api');
	my $response = $lwp->post($endpoint, \%pfields);
	return $response->decoded_content;
}
sub build_single {
	my $tnum = shift || 0;
	my $ticket = $whmcs->{tickets}->{ticket}->[$tnum];
	my ($tid,$tsubj,$ttime,$tstat);
	$tid = $ticket->{tid}; $ttime = $ticket->{lastreply};
	$tsubj = $ticket->{subject}; $tstat = $ticket->{status};
	$tsubj = substr($tsubj,0,$maxsubjlen)."…" if length $tsubj > $maxsubjlen;
	$ttime =~ s/$/ -0700/; $ttime = str2time $ttime;
	return if known $tid, $ttime;
	$ttime = relative_time $ttime;
	$tstat = "opened" if $tstat eq "Open"; $tstat = "response" if $tstat eq "Customer-Reply";
	return ("New ticket $tstat","#$tid: $tsubj ($ttime)");
}
sub build_many {
	my ($openc,$replc,$esclc,$othc,$ltnum) = (0,0,0,0,0);
	for(my $t=0;$t<$whmcs->{numreturned};$t++) {
		my $ticket = $whmcs->{tickets}->{ticket}->[$t];
		my $tid = $ticket->{tid};
		my $ttime = $ticket->{lastreply}; $ttime =~ s/$/ -0700/; $ttime = str2time $ttime;
		next if known $tid, $ttime;
		$ltnum=$t;
		for($ticket->{status}) {
			$openc++ when /Open/;
			$replc++ when /Customer-Reply/;
			$esclc++ when /Escalated/i;
			default { $othc++ }
		}
	}
	my $tc = ($openc+$replc+$esclc+$othc);
	return unless $tc;
	return build_single $ltnum if $tc == 1;
	my $tstr = "";
	$openc and $tstr .= "$openc open";
	$replc and $tstr .= (length $tstr? ', ' : '')."$replc replied to";
	$esclc and $tstr .= (length $tstr? ', ' : '')."$esclc escalated";
	$othc and $tstr .= (length $tstr? ', ' : '')."$othc misc.";
	return ("New tickets waiting",$tstr);
}
sub build {
	$whmcs = fetchWaitingTickets;
	return ("Error","Failed to parse response from WHMCS: $whmcs") if $whmcs !~ /^{/;
	$whmcs = decode_json $whmcs;
	return ("Error","Failed to fetch tickets from WHMCS") if $whmcs->{result} ne "success";
	return unless $whmcs->{numreturned};
	return build_single if $whmcs->{numreturned} == 1;
	return build_many;
}
my ($t,$m) = build or exit 0;
nc_notify $t, $m;