#!/usr/bin/perl

use strict;
use warnings;

use Email::Sender::Simple qw(sendmail);
use Sipwise::Provisioning::Billing;

my %LOCK = (
	none => undef,
	foreign => 1,
	outgoing => 2,
	incoming => 3,
	global => 4,
	0 => 'none',
	1 => 'foreign',
	2 => 'outgoing',
	3 => 'incoming',
	4 => 'global',
); 

my $conf = Sipwise::Provisioning::Config->new()->get_config();

my $o = Sipwise::Provisioning::Billing->new();
my $db = $o->{database};

my $a = $db->sql_get_all_arrayref(<<"!");
SELECT 'profile_limit' as type, cdr.source_account_id, SUM(cdr.source_customer_cost) AS daily_cost, bpinfo.contract_id,
  bpinfo.fraud_daily_limit, bpinfo.fraud_daily_lock, bpinfo.fraud_daily_notify
FROM ( 
  SELECT contracts.id as contract_id,
    billing_profiles.fraud_daily_limit, billing_profiles.fraud_daily_lock, billing_profiles.fraud_daily_notify
  FROM billing.contracts 
  JOIN billing.billing_mappings ON contracts.id = billing_mappings.contract_id
  JOIN billing.billing_profiles 
    ON (billing_profiles.id = 
      (SELECT m.billing_profile_id
        FROM billing.billing_mappings m
        WHERE ((m.start_date IS NULL) OR (m.start_date <= NOW()))
          AND ((m.end_date IS NULL) OR (m.end_date >= NOW()))
          AND (m.contract_id = contracts.id)
        ORDER BY m.start_date DESC LIMIT 1
      )
    )
  WHERE (contracts.status = 'active')
    AND (billing_profiles.fraud_daily_limit IS NOT NULL)
    AND (billing_profiles.fraud_daily_limit > 0)
) as bpinfo 
JOIN accounting.cdr ON cdr.source_account_id = bpinfo.contract_id
WHERE (DATEDIFF(FROM_UNIXTIME(cdr.start_time), CURDATE()) = 0)
GROUP BY cdr.source_account_id
HAVING (daily_cost > bpinfo.fraud_daily_limit)

UNION ALL

SELECT 'account_limit' as type, cdr.source_account_id, SUM(cdr.source_customer_cost) AS daily_cost,
       contracts.id,
       contract_fraud_preferences.fraud_daily_limit, contract_fraud_preferences.fraud_daily_lock, 
       contract_fraud_preferences.fraud_daily_notify
FROM accounting.cdr
JOIN billing.contracts ON cdr.source_account_id = contracts.id
JOIN billing.contract_fraud_preferences ON contracts.id = contract_fraud_preferences.contract_id
WHERE (contracts.status = 'active')
  AND (DATEDIFF(FROM_UNIXTIME(cdr.start_time), CURDATE()) = 0)
GROUP BY cdr.source_account_id
!

my $x = {};
for my $e (@{ $a }) {
  if(exists $x->{$e->{id}}) {
    if($x->{$e->{id}}->{type} eq 'profile_limit' && $e->{type} eq 'account_limit') {

      # if account limit hits and it has lock and/or notify, mark for action
      if(defined $e->{fraud_daily_limit} and
         int($e->{daily_cost}) >= int($e->{fraud_daily_limit}) and
         ($e->{fraud_daily_lock} || $e->{fraud_daily_notify})) {

        $x->{$e->{id}} = $e;
      } else {
        # we have account fraud prefs set, but either the limit is not reached
        # or no actions are necessary, let it slip through, overriding
        # billing profile fraud settings
        delete $x->{$e->{id}};
      }
    }
  } else {
    # if account or billing profile limit hits and it has lock and/or notify,
    # mark for action
    if(defined $e->{fraud_daily_limit} and
       int($e->{daily_cost}) >= int($e->{fraud_daily_limit}) and
       ($e->{fraud_daily_lock} || $e->{fraud_daily_notify})) {

      $x->{$e->{id}} = $e;
    }
  }
}

for my $e (values %{ $x }) {
	$e->{fraud_daily_lock} and
		$o->lock_voip_account({id => $e->{id}, lock => $LOCK{$e->{fraud_daily_lock}}});

	$e->{fraud_daily_notify} or next;

	my $subs = $db->sql_get_all_arrayref(<<"!", $e->{id});
		SELECT s.username, d.domain, s.external_id
                  FROM voip_subscribers s
             LEFT JOIN domains d ON d.id = s.domain_id
                 WHERE s.contract_id = ?
                 AND s.status != 'terminated'
!

 my $cur = sprintf('%.2f', $e->{daily_cost} / 100);
	my $max = sprintf('%.2f', $e->{fraud_daily_limit} / 100);

    my ($subject, $body);
    if ($e->{fraud_daily_lock}) {
        $body = "Account ID " . $e->{id} . " has been locked due to exceeding the configured" . "\n"
              . "daily credit balance threshold ($cur >= $max ) in the "
              . ($e->{type} eq 'profile_limit' ? 'billing profile' : 'account settings') . "\n\n";
	$subject = 'Account ID ' . $e->{id} . ' locked by daily fraud detection';
    }
    else {
        $body = "Account ID " . $e->{id} . " is currently exceeding the configured daily credit balance" . "\n"
              . "threshold ($cur >= $max) in the "
              . ($e->{type} eq 'profile_limit' ? 'billing profile' : 'account settings') . ",\n"
              . "but has not been locked due to configuration.\n\n";
	$subject = 'Account ID ' . $e->{id} . ' exceeding daily fraud detection limit';
    }

	if (!$subs || !@$subs) {
		$body .= "There are no affected subscribers.\n";
	}
	else {
		$body .= "Affected subscribers:\n";
		for my $s (@$subs) {
			$body .= "\t$s->{username}\@$s->{domain}".
				($s->{external_id} ? " (external ID '$s->{external_id}')"
				: '') . "\n";
		}
	}

    sendmail ( Email::Simple->create(
        header => [
            To      => $e->{fraud_daily_notify},
            From    => $$conf{adminmail},
            Subject => $subject,
        ],
        body => $body,
    ));
}

1;