#!/usr/bin/perl
# Copyright © 2018, Bradley M. Kuhn
#   License: AGPL-3.0-or-later

use strict;
use warnings;

use autodie qw(:all);

use Getopt::Long;
use File::Spec;
use Date::Manip qw(ParseDate UnixDate);

my($VERBOSE, $INTERACTIVE, $PAYMENT_NUMBER, $SVN_CMD, $ROUND, $TRAVEL_NOTICE_TICKET, $ACTIVATE_TICKET_CORRESPONDENCE_FILE);

our $RT_CMD;
our $VERBOSE;
require 'rt-helper.pl';


###############################################################################

GetOptions("verbose=i" => \$VERBOSE, "interactive" => \$INTERACTIVE,
           "paymentNumber=i" => \$PAYMENT_NUMBER, "rtCommand=s" => \$RT_CMD,
           "svnCommand=s" => \$SVN_CMD, "round=s" => \$ROUND,
           "activateInstructions=s" => \$ACTIVATE_TICKET_CORRESPONDENCE_FILE,
           'travelNoticeTicket=i' => \$TRAVEL_NOTICE_TICKET);


$RT_CMD = '/usr/bin/rt' unless defined $RT_CMD;
$SVN_CMD = '/usr/bin/svn' unless defined $SVN_CMD;

$INTERACTIVE = 0 if not defined $INTERACTIVE;

unless (defined $ROUND and $ROUND =~ /^[\d\-]+$/) {
  print STDERR "usage: $0 --round=<YEAR-MONTH> option is required and must formated as YYYY-MM\n";
  exit 1;
}
unless (defined $PAYMENT_NUMBER and $PAYMENT_NUMBER =~ /^[123]$/) {
  print STDERR "usage: $0 --paymentNumber=<VALUE>  option is required and must be 1, 2 or 3\n";
  exit 1;
}
unless (defined $TRAVEL_NOTICE_TICKET) {
  print STDERR "usage: $0 --travelNoticeTicket=<TICKET_NUMBER> option is required and must be an integer\n";
  exit 1;
}
unless (-r $ACTIVATE_TICKET_CORRESPONDENCE_FILE and -f $ACTIVATE_TICKET_CORRESPONDENCE_FILE) {
  print STDERR "usage: $0 --activateInstructions=<FILE>   option is required and must be readible text file\n";
  exit 1;
}
my @activateInstructions;
open (my $activateFH, "<", $ACTIVATE_TICKET_CORRESPONDENCE_FILE);
while (my $line = <$activateFH>) {
  push(@activateInstructions, $line);
}
close $activateFH;

my @ticketSpecs = Outreachy_FindMainTicketsInRound($ROUND);
my $expectedCompletedInternshipField = '(payment-' . $PAYMENT_NUMBER . '-approved|unsuccessful)';

my(%noticeTicketLinks) = GetLinksForTicket("ticket/" . $TRAVEL_NOTICE_TICKET);

if ($VERBOSE > 5) {
  use Data::Dumper;
  print STDERR "Travel Notice Ticket links are: \n", Data::Dumper->Dump([\%noticeTicketLinks]);
}
foreach my $ticketSpec (@ticketSpecs) {
  my(%links) = GetLinksForTicket($ticketSpec);
if ($VERBOSE > 5) {
  use Data::Dumper;
  print STDERR "$ticketSpec has links as follows: \n", Data::Dumper->Dump([\%links]);
}
  my $reimbursementTicket = FindReimbursementTicketFromList($ROUND, @{$links{Members}});
  if (not defined $reimbursementTicket) {
    print STDERR "\"$ticketSpec\": Skipped: no reimbursement ticket found.\n";
    next;
  }
  my $reimburseStatus = GetStatusFromTicket($reimbursementTicket);

  my $completedInternshipField = GetCustomFieldForTicket($ticketSpec, "completed-internship");
  if ($completedInternshipField =~ /unsuccessful/) {
    # For unsuccessful, just verify that the ticket is unlinked from travel notice ticket
    # and already in rejected status.
    if ($reimburseStatus ne 'rejected') {
      print STDERR "\"$ticketSpec\": \"$reimbursementTicket\": Skipped: reimbursement ticket in state of \"$reimburseStatus\" but should be rejected since intern was unsuccessful\n";
      next;
    }
    if ($reimbursementTicket ~~ @{$noticeTicketLinks{DependedOnBy}}) {
      print STDERR "\"$ticketSpec\": \"$reimbursementTicket\": Skipped: reimbursement ticket still linked to travel notice ticket of $TRAVEL_NOTICE_TICKET, but it should not be since intern was unsuccessful\n";
      next;
    }
  } else {
     # Otherwise, the intern hasn't failed yet, so check they've received $PAYMENT_NUMBER payment and activate notice.
    my $date = PaymentDateByTicket($ticketSpec, $PAYMENT_NUMBER);
    if (not defined $date) {
      print STDERR "\"$ticketSpec\": \"$reimbursementTicket\": Skipped: Payment $PAYMENT_NUMBER appears to not have been completed, so not activating travel ticket.\n";
      next;
    }
    if ("ticket/$reimbursementTicket" ~~  @{$noticeTicketLinks{DependedOnBy}}) {
      open(my $rtCorrespondFH, "|-", $RT_CMD, 'correspond', $reimbursementTicket, '-m', '-');
      foreach my $line (@activateInstructions) { print $rtCorrespondFH $line; }
      close $rtCorrespondFH;
      system($RT_CMD, "link", '-d', $reimbursementTicket, 'dependson', $TRAVEL_NOTICE_TICKET);
      system($RT_CMD, "link", $TRAVEL_NOTICE_TICKET, 'refersto', $reimbursementTicket);
      system($RT_CMD, "edit", $reimbursementTicket, 'set',
             'Due=2019-05-14 18:00' , 'CF.{due-date-from}=budget-expiration', 'status=awaiting-request');
    } elsif ("ticket/$reimbursementTicket" ~~  @{$noticeTicketLinks{RefersTo}}) {
      print STDERR "\"$ticketSpec\": \"$reimbursementTicket\": Skipped: ALREADY PROCESSED.\n";
    } else {
      print STDERR "\"$ticketSpec\": \"$reimbursementTicket\": Skipped: $TRAVEL_NOTICE_TICKET does not include $reimbursementTicket in its list of DependedOnBy tickets, but that is only reason for skip .\n";
    }
  }
}
###############################################################################
#
# Local variables:
# compile-command: "perl -c rt-outreachy-activate-travel-tickets.plx"
# perl-indent-level: 2
# End: