#
# obs_notify_generic
#
# Copyright (c) 2015 Jörg Steffens
#
# inspired of
#   https://build.opensuse.org/package/show/isv:B1-Systems:OBS/obs-notfy_email
#   Copyright (c) 2014 Christian Schneemann, B1 Systems GmbH
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program (see the file COPYING); if not, write to the
# Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
#
################################################################

package obs_notify_generic;

use strict;
use warnings;

#use BSConfig;
use lib "/usr/lib/obs/server/plugins/";
use obs_notify_generic_config;
use Data::Dumper;
use IPC::Run;
use Proc::Daemon;
use Time::Piece;

#use XML::Simple;

# stdout goes to /srv/obs/log/src_server.log

sub new
{
    my $self = {
        'cfg'     => ${obs_notify_generic_config::cfg},
        'logfile' => ${obs_notify_generic_config::logfile},
    };
    if ( not $self->{'logfile'} ) {
        ##$self->{'logfile'} = "/tmp/notify_generic.log";
        $self->{'logfile'} = "/srv/obs/log/notify_generic.log";
    }
    bless $self, shift;
    return $self;
}

sub notify
{
    my ( $self, $type, $paramRef ) = @_;

    $type = "UNKNOWN" unless $type;

    my $cfg_type;
    if ( $self->{'cfg'}->{$type} ) {
        $cfg_type = $self->{'cfg'}->{$type};
    } elsif ( $self->{'cfg'}->{'UNKNOWN'} ) {
        $cfg_type = $self->{'cfg'}->{'UNKNOWN'};
    }

    for my $entry ( @{$cfg_type} ) {
        my $match = 1;
        foreach my $key ( keys %{ $entry->{'filter'} } ) {
            my $value = $entry->{'filter'}->{$key};

            #print "key: $key\n";
            #print "value: $value\n";
            if ( not( exists( $paramRef->{$key} ) ) ) {
                error_msg( "$type ("
                      . Data::Dumper->new( [$paramRef] )->Indent(0)->Dump
                      . "): filter for '"
                      . $key
                      . "' is invalid" );
                $match = 0;

                # exit loop
                last;
            } elsif ( not( $paramRef->{$key} =~ /$value/ ) ) {
                $match = 0;
            }
        }
        if ($match) {
            my $extra = undef;
            if ( $entry->{'action'} ) {

                if ( $paramRef->{'project'} ) {
                    my $project = $paramRef->{'project'};
                    $project =~ s/:/:\//g;
                    $paramRef->{'project_path'} = "/srv/obs/repos/" . $project;
                }

                # create regex,
                # test against longest string first to avoid partial replacement ($repo, $repository)
                my $check = join '|',
                  sort { length($b) <=> length($a) } keys %{$paramRef};
                my $action = $entry->{'action'};
                $action =~ s/\$($check)/$paramRef->{$1}/g;

                $extra = {
                    'action_template' => $entry->{'action'},
                    'action'          => $action,
                };

                #$self->run_wait( $action, $extra );
                $self->run_daemon( $action, $extra );
            }
            if ( $entry->{'log'} ) {
                $self->log( $type, $paramRef, $extra );
            }
        } else {

            #print "no match\n";
        }
    }
}

sub run_wait
{
    my ( $self, $action, $extra ) = @_;

    my $in = undef;
    my $out;
    my $err;
    my $rc;
    eval {
        my $process =
          IPC::Run::start(
            [ "sh", "--login", "-c", "HOME=/usr/lib/obs $action", "2>&1" ],
            \$in, \$out, \$err );
        $process->finish();
        $rc = $process->result(0);
    };
    if ($@) {

        #print "eval: ", $@;
        $out = join( "\n", $@ );
        $rc = 127;
    }

    chomp($out);

    $extra->{'returncode'} = $rc;
    $extra->{'output'}     = $out;
}

sub run_daemon
{
    my ( $self, $action, $extra ) = @_;

    my $daemon = Proc::Daemon->new();
    my $pid    = $daemon->Init(
        {
            exec_command => "date --rfc-3339=seconds; echo '$action'; $action",
            child_STDOUT => "+>>" . $self->{'logfile'} . ".out.log",
            child_STDERR => "+>>" . $self->{'logfile'} . ".out.log",
        }
    );

    #print $daemon->Status($pid);

    $extra->{'pid'} = $pid;
}

sub error_msg
{
    print "FAILED: ", join( " ", @_ ) . "\n";
}

sub log
{
    my ( $self, $type, $paramRef, $extra ) = @_;

    my $fh;
    my $file_opened = 0;

    if ( $self->{'logfile'} eq "STDOUT" ) {
        $fh = *STDOUT;
    } else {

        if ( open( $fh, '>>', $self->{'logfile'} ) ) {
            $file_opened = 1;
        } else {
            error_msg( "failed to open log file " . $self->{'logfile'} );
            return 1;
        }
    }

    print $fh localtime->strftime("%Y%m%d %H%M%S"), " TYPE=$type";

    if ($extra) {
        print $fh "\n";
        print $fh Dumper( { 'param' => $paramRef, 'extra' => $extra } );
        print $fh "\n";
    } else {
        print $fh " ";
        print $fh Data::Dumper->new( [$paramRef] )->Indent(0)->Dump;
        print $fh "\n";
    }
    if ($file_opened) {
        close $fh;
    }
}

# sub notify_setting {
#   my ($self, $project) = @_;
#   my ($xml, $attributes);
#
#   $xml = $self->call_obs_api("/source/$project/_attribute/$notify_email_config::notify_attr");
#
#   if ($xml) {
#     $attributes = XMLin($xml, KeyAttr => { }, ForceArray =>0);
#   }
#
#   return $attributes->{attribute}->{'value'} || 0;
# }

# sub unique {
#   my ($self, @a) = @_;
#   return keys %{{ map { $_ => 1 } @a }};
# }

# sub get_obs_maintainer {
#   my ($self, $project, $package) = @_;
#   my ($request, @persons, $xml, $meta);
#   if ($package) {
#     $request = "/source/$project/$package/_meta";
#     $xml = $self->call_obs_api($request);
#     $meta = XMLin($xml, KeyAttr => {}, ForceArray => [ 'person'] );
#
#     @persons = grep { $_->{'role'} =~ /$notify_email_config::notified_roles/i  } @{$meta->{person}};
#   }
#   $request = "/source/$project/_meta";
#
#   $xml = $self->call_obs_api($request);
#   $meta = XMLin($xml, KeyAttr => {}, ForceArray => ['person'] );
#
#   push @persons, grep { $_->{'role'} =~ /$notify_email_config::notified_roles/i  } @{$meta->{person}};
#
#   @persons = $self->unique(map{ $_->{'userid'} } @persons);
#
#   return @persons;
# }
#
# sub get_obs_email {
#   my ($self, $user) = @_;
#
#   my $xml = $self->call_obs_api("/person/$user");
#
#   $xml = XMLin($xml, KeyAttr => {}, ForceArray => 0);
#
#   return $xml->{'email'};
# }

# sub call_obs_api {
#     my ($self, $api_call) = @_;
#     return `$notify_email_config::curl_binary -k -s -u $notify_email_config::api_user:$notify_email_config::api_pass $notify_email_config::api_url/$api_call`;
# }

1;