#!@PERL_EXECUTABLE@ -wT
#
# ==========================================================================
#
# ZoneMinder Control Script, $Date$, $Revision$
# Copyright (C) 2001-2008 Philip Coombes
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# 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; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# ==========================================================================

use strict;

@EXTRA_PERL_LIB@
use ZoneMinder;
use Getopt::Long;
use autouse 'Pod::Usage'=>qw(pod2usage);
use POSIX qw/strftime EPIPE EINTR/;
use Socket;
use Data::Dumper;
use Module::Load::Conditional qw{can_load};

use constant MAX_CONNECT_DELAY => 15;
use constant MAX_COMMAND_WAIT => 1800;

$| = 1;

$ENV{PATH}  = '/bin:/usr/bin:/usr/local/bin';
$ENV{SHELL} = '/bin/sh' if exists $ENV{SHELL};
delete @ENV{qw(IFS CDPATH ENV BASH_ENV)};

my $arg_string = join(' ', @ARGV);

my $id;
my %options;

GetOptions(
  'id=i'          =>\$id,
  'command=s'     =>\$options{command},
  'xcoord=f'      =>\$options{xcoord},
  'ycoord=f'      =>\$options{ycoord},
  'speed=f'       =>\$options{speed},
  'step=i'        =>\$options{step},
  'panspeed=i'    =>\$options{panspeed},
  'tiltspeed=i'   =>\$options{tiltspeed},
  'panstep=i'     =>\$options{panstep},
  'tiltstep=i'    =>\$options{tiltstep},
  'preset=i'      =>\$options{preset},
  'autostop'      =>\$options{autostop},
) or pod2usage(-exitstatus => -1);

if (!$id) {
  print(STDERR "Please give a valid monitor id\n");
  pod2usage(-exitstatus => -1);
}

($id) = $id =~ /^(\w+)$/;
logInit($id?(id=>'zmcontrol_'.$id):());

my $sock_file = $Config{ZM_PATH_SOCKS}.'/zmcontrol-'.$id.'.sock';
Debug("zmcontrol: arg string: $arg_string sock file $sock_file");

socket(CLIENT, PF_UNIX, SOCK_STREAM, 0) or Fatal("Can't open socket: $!");

my $saddr = sockaddr_un($sock_file);

if ($options{command}) {
  # Have a command, so we are the client, connect to the server and send it.

  my $tries = 10;
  my $server_up;
  while ( $tries and ! ( $server_up = connect(CLIENT, $saddr) ) ) {
    Debug("Failed to connect to zmcontrol server at $sock_file");
    runCommand("zmdc.pl start zmcontrol.pl --id $id");
    sleep 1;
    $tries -= 1;
  }
  if ( $server_up ) {
    # The server is there, connect to it
    #print( "Writing commands\n" );
    CLIENT->autoflush();

    if ( $options{command} ) {
      my $message = jsonEncode(\%options);
      print(CLIENT $message);
    }
    shutdown(CLIENT, 1);
  } else {
    Error("Unable to connect to zmcontrol server at $sock_file");
  }
} else {
  # The server isn't there
  my $monitor = zmDbGetMonitorAndControl($id);
  Fatal("Unable to load control data for monitor $id") if !$monitor;

  my $protocol = $monitor->{Protocol};
  if (!$protocol) {
    Fatal('No protocol is set in monitor. Please edit the monitor, edit control type, select the control capability and fill in the Protocol field');
  }

  if (-x $protocol) {
    # Protocol is actually a script!
    # Holdover from previous versions
    my $command .= $protocol.' '.$arg_string;
    Debug($command);

    my $output = qx($command);
    my $status = $? >> 8;
    if ($status || logDebugging()) {
      chomp($output);
      Debug("Output: $output");
    }
    if ($status) {
      Error("Command '$command' exited with status: $status");
      exit($status);
    }
    exit(0);
  }

  Info("Starting control server $id/$protocol");
  close(CLIENT);

  if (!can_load(modules => {'ZoneMinder::Control::'.$protocol => undef})) {
    Fatal("Can't load ZoneMinder::Control::$protocol\n$Module::Load::Conditional::ERROR");
  }

  my $zm_terminate = 0;
  sub TermHandler {
    Info('Received TERM, exiting');
    $zm_terminate = 1;
  }
  $SIG{TERM} = \&TermHandler;
  $SIG{INT} = \&TermHandler;

  Info("Control server $id/$protocol starting at "
    .strftime('%y/%m/%d %H:%M:%S', localtime())
  );

  $0 = $0.' --id '.$id;

  my $control = ('ZoneMinder::Control::'.$protocol)->new($id);
  my $control_key = $control->getKey();
  $control->loadMonitor();

  $control->open();

  # If we have a command when starting up, then do it.
  if ($options{command}) {
    my $command = $options{command};
    $control->$command(\%options);
  }

  socket(SERVER, PF_UNIX, SOCK_STREAM, 0) or Fatal("Can't open socket: $!");
  unlink($sock_file);
  bind(SERVER, $saddr) or Fatal("Can't bind: $!");
  listen(SERVER, SOMAXCONN) or Fatal("Can't listen: $!");

  my $rin = '';
  vec($rin, fileno(SERVER), 1) = 1;
  my $win = $rin;
  my $ein = $win;
  my $timeout = MAX_COMMAND_WAIT;
  while (!$zm_terminate) {
    my $nfound = select(my $rout = $rin, undef, undef, $timeout);
    if ( $nfound > 0 ) {
      if ( vec($rout, fileno(SERVER), 1) ) {
        my $paddr = accept(CLIENT, SERVER);
        my $message = <CLIENT>;
        close(CLIENT);

        next if !$message;

        my $params = jsonDecode($message);
        Debug(Dumper($params));

        my $command = $params->{command};
        if ( $command eq 'quit' ) {
          last;
        } elsif ( $command ) {
          $control->$command($params);
        } else {
          Warning("No command in $message");
        }
      } else {
        Fatal('Bogus descriptor');
      }
    } elsif ( $nfound < 0 ) {
      if ( $! == EINTR ) {
        # Likely just SIGHUP
        Debug("Can't select: $!");
      } elsif ( $! == EPIPE ) {
        Error("Can't select: $!");
      } else {
        Fatal("Can't select: $!");
      }
    } else {
      Debug('Select timed out');
    }
  } # end while !$zm_terminate
  Info("Control server $id/$protocol exiting");
  unlink($sock_file);
  $control->close();
} # end if !server up

exit(0);

1;
__END__

=head1 NAME

zmcontrol.pl - ZoneMinder control script

=head1 SYNOPSIS

 zmcontrol.pl --id {monitor_id} [--command={command}] [various options]

=head1 DESCRIPTION

FIXME FIXME

=head1 OPTIONS

 --autostop          -
 --xcoord [ arg ]    - X-coord
 --ycoord [ arg ]    - Y-coord
 --speed [ arg ]     - Speed
 --step [ arg ]      -
 --panspeed [ arg ]  -
 --panstep [ arg ]   -
 --tiltspeed [ arg ] -
 --tiltstep [ arg ]  -
 --preset [ arg ]    -

=cut