#!/usr/bin/perl -wT
#
# ==========================================================================
#
# ZoneMinder X10 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
# ==========================================================================

=head1 NAME

zmx10.pl - ZoneMinder X10 Control Script

=head1 SYNOPSIS

 zmx10.pl -c <command>,--command=<command> [-u <unit code>,--unit-code=<unit code>]

=head1 DESCRIPTION

This script controls the monitoring of the X10 interface and the consequent
management of the ZM daemons based on the receipt of X10 signals.

=head1 OPTIONS

 -c <command>, --command=<command>       - Command to issue, one of 'on','off','dim','bright','status','shutdown'
 -u <unit code>, --unit-code=<unit code> - Unit code to act on required for all commands
                                           except 'status' (optional) and 'shutdown'
 -v, --verison                           - Pirnts the currently installed version of ZoneMinder

=cut
use strict;
use bytes;

# ==========================================================================
#
# These are the elements you can edit to suit your installation
#
# ==========================================================================

use constant CAUSE_STRING => "X10"; # What gets written as the cause of any events

# ==========================================================================
#
# Don't change anything below here
#
# ==========================================================================

@EXTRA_PERL_LIB@
use ZoneMinder;
use POSIX;
use Socket;
use Getopt::Long;
use autouse 'Pod::Usage'=>qw(pod2usage);
use autouse 'Data::Dumper'=>qw(Dumper);

use constant SOCK_FILE => $Config{ZM_PATH_SOCKS}.'/zmx10.sock';

$| = 1;

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

logInit();
logSetSignal();

my $command;
my $unit_code;
my $version;

GetOptions(
    'command=s'     =>\$command,
    'unit-code=i'   =>\$unit_code,
    'version'       =>\$version
) or pod2usage(-exitstatus => -1);

if ( $version ) {
    print ZoneMinder::Base::ZM_VERSION;
    exit(0);
}

die( "No command given" ) unless( $command );
die( "No unit code given" )
    unless( $unit_code || ($command =~ /(?:start|status|shutdown)/) );

if ( $command eq "start" )
{
    X10Server::runServer();
    exit();
}

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

my $saddr = sockaddr_un( SOCK_FILE );

if ( !connect( CLIENT, $saddr ) )
{
    # The server isn't there 
    print( "Unable to connect, starting server\n" );
    close( CLIENT );

    if ( my $cpid = fork() )
    {
        # Parent process just sleep and fall through
        sleep( 2 );
        logReinit();
        socket( CLIENT, PF_UNIX, SOCK_STREAM, 0 )
            or Fatal( "Can't open socket: $!" );
        connect( CLIENT, $saddr )
            or Fatal( "Can't connect: $!" );
    }
    elsif ( defined($cpid) )
    {
        setpgrp();

        logReinit();
        X10Server::runServer();
    }
    else
    {
        Fatal( "Can't fork: $!" );
    }
}
# The server is there, connect to it
#print( "Writing commands\n" );
CLIENT->autoflush();
my $message = "$command";
$message .= ";$unit_code" if ( $unit_code );
print( CLIENT $message );
shutdown( CLIENT, 1 );
while ( my $line = <CLIENT> )
{
    chomp( $line );
    print( "$line\n" );
}
close( CLIENT );
#print( "Finished writing, bye\n" );
exit;

#
# ==========================================================================
#
# This is the X10 Server package
#
# ==========================================================================
#
package X10Server;

use strict;
use bytes;

use ZoneMinder;
use POSIX;
use DBI;
use Socket;
use X10::ActiveHome;
use autouse 'Data::Dumper'=>qw(Dumper);

our $dbh;
our $x10;

our %monitor_hash;
our %device_hash;
our %pending_tasks;

sub runServer
{
    Info( "X10 server starting\n" );

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

    $dbh = zmDbConnect();

    $x10 = new X10::ActiveHome( port=>$Config{ZM_X10_DEVICE}, house_code=>$Config{ZM_X10_HOUSE_CODE}, debug=>0 );

    loadTasks();

    $x10->register_listener( \&x10listen );

    my $rin = '';
    vec( $rin, fileno(SERVER),1) = 1;
    vec( $rin, $x10->select_fds(),1) = 1;
    my $timeout = 0.2;
    #print( "F:".fileno(SERVER)."\n" );
    my $reload = undef;
    my $reload_count = 0;
    my $reload_limit = $Config{ZM_X10_DB_RELOAD_INTERVAL} / $timeout;
    while( 1 )
    {
        my $nfound = select( my $rout = $rin, undef, undef, $timeout );
        #print( "Off select, NF:$nfound, ER:$!\n" );
        #print( vec( $rout, fileno(SERVER),1)."\n" );
        #print( vec( $rout, $x10->select_fds(),1)."\n" );
        if ( $nfound > 0 )
        {
            if ( vec( $rout, fileno(SERVER),1) )
            {
                my $paddr = accept( CLIENT, SERVER );
                my $message = <CLIENT>;

                my ( $command, $unit_code ) = split( /;/, $message );

                my $device;
                if ( defined($unit_code) )
                {
                    if ( $unit_code < 1 || $unit_code > 16 )
                    {
                        dPrint( ZoneMinder::Logger::ERROR, "Invalid unit code '$unit_code'\n" );
                        next;
                    }

                    $device = $device_hash{$unit_code};
                    if ( !$device )
                    {
                        $device = $device_hash{$unit_code} = { appliance=>$x10->Appliance( unit_code=>$unit_code ),
                                                               status=>'unknown'
                                                             };
                    }
                }

                my $result;
                if ( $command eq 'on' )
                {
                    $result = $device->{appliance}->on();
                }
                elsif ( $command eq 'off' )
                {
                    $result = $device->{appliance}->off();
                }
                #elsif ( $command eq 'dim' )
                #{
                    #$result = $device->{appliance}->dim();
                #}
                #elsif ( $command eq 'bright' )
                #{
                    #$result = $device->{appliance}->bright();
                #}
                elsif ( $command eq 'status' )
                {
                    if ( $device )
                    {
                        dPrint( ZoneMinder::Logger::DEBUG, $unit_code." ".$device->{status}."\n" );
                    }
                    else
                    {
                        foreach my $unit_code ( sort( keys(%device_hash) ) )
                        {
                            my $device = $device_hash{$unit_code};
                            dPrint( ZoneMinder::Logger::DEBUG, $unit_code." ".$device->{status}."\n" );
                        }
                    }
                }
                elsif ( $command eq 'shutdown' )
                {
                    last;
                }
                else
                {
                    dPrint( ZoneMinder::Logger::ERROR, "Invalid command '$command'\n" );
                }
                if ( defined($result) )
                {
                    if ( 1 || $result )
                    {
                        $device->{status} = uc($command);
                        dPrint( ZoneMinder::Logger::DEBUG, $device->{appliance}->address()." $command, ok\n" );
                        #x10listen( new X10::Event( sprintf("%s %s", $device->{appliance}->address, uc($command) ) ) );
                    }
                    else
                    {
                        dPrint( ZoneMinder::Logger::ERROR, $device->{appliance}->address()." $command, failed\n" );
                    }
                }
                close( CLIENT );
            }
            elsif ( vec( $rout, $x10->select_fds(),1) )
            {
                $x10->handle_input();
            }
            else
            {
                Fatal( "Bogus descriptor" );
            }
        }
        elsif ( $nfound < 0 )
        {
            if ( $! != EINTR )
            {
                Fatal( "Can't select: $!" );
            }
        }
        else
        {
            #print( "Select timed out\n" );
            # Check for state changes
            foreach my $monitor_id ( sort(keys(%monitor_hash) ) )
            {
                my $monitor = $monitor_hash{$monitor_id};
                my $state = zmGetMonitorState( $monitor );
                if ( !defined($state) )
                {
                    $reload = !undef;
                    next;
                }
                if ( defined( $monitor->{LastState} ) )
                {
                    my $task_list;
                    if ( ($state == STATE_ALARM || $state == STATE_ALERT)
                         && ($monitor->{LastState} == STATE_IDLE || $monitor->{LastState} == STATE_TAPE)
                    ) # Gone into alarm state
                    {
                        Debug( "Applying ON_list for $monitor_id\n" );
                        $task_list = $monitor->{"ON_list"};
                    }
                    elsif ( ($state == STATE_IDLE && $monitor->{LastState} != STATE_IDLE)
                            || ($state == STATE_TAPE && $monitor->{LastState} != STATE_TAPE)
                    ) # Come out of alarm state
                    {
                        Debug( "Applying OFF_list for $monitor_id\n" );
                        $task_list = $monitor->{"OFF_list"};
                    }
                    if ( $task_list )
                    {
                        foreach my $task ( @$task_list )
                        {
                            processTask( $task );
                        }
                    }
                }
                $monitor->{LastState} = $state;
            }

            # Check for pending tasks
            my $now = time();
            foreach my $activation_time ( sort(keys(%pending_tasks) ) )
            {
                last if ( $activation_time > $now );
                my $pending_list = $pending_tasks{$activation_time};
                foreach my $task ( @$pending_list )
                {
                    processTask( $task );
                }
                delete( $pending_tasks{$activation_time} );
            }
            if ( $reload || ++$reload_count >= $reload_limit )
            {
                loadTasks();
                $reload = undef;
                $reload_count = 0;
            }
        }
    }
    Info( "X10 server exiting\n" );
    close( SERVER );
    exit();
}

sub addToDeviceList
{
    my $unit_code = shift;
    my $event = shift;
    my $monitor = shift;
    my $function = shift;
    my $limit = shift;

    Debug( "Adding to device list, uc:$unit_code, ev:$event, mo:"
           .$monitor->{Id}.", fu:$function, li:$limit\n"
    );
    my $device = $device_hash{$unit_code};
    if ( !$device )
    {
        $device = $device_hash{$unit_code} = { appliance=>$x10->Appliance( unit_code=>$unit_code ),
                                               status=>'unknown'
                                             };
    }

    my $task = { type=>"device",
                 monitor=>$monitor,
                 address=>$device->{appliance}->address(),
                 function=>$function
    };
    if ( $limit )
    {
        $task->{limit} = $limit
    }

    my $task_list = $device->{$event."_list"};
    if ( !$task_list )
    {
        $task_list = $device->{$event."_list"} = [];
    }
    push( @$task_list, $task );
}

sub addToMonitorList
{
    my $monitor = shift;
    my $event = shift;
    my $unit_code = shift;
    my $function = shift;
    my $limit = shift;

    Debug( "Adding to monitor list, uc:$unit_code, ev:$event, mo:".$monitor->{Id}
          .", fu:$function, li:$limit\n"
    );
    my $device = $device_hash{$unit_code};
    if ( !$device )
    {
        $device = $device_hash{$unit_code} = { appliance=>$x10->Appliance( unit_code=>$unit_code ),
                                               status=>'unknown'
                                             };
    }

    my $task = { type=>"monitor",
                 device=>$device,
                 id=>$monitor->{Id},
                 function=>$function
    };
    if ( $limit )
    {
        $task->{limit} = $limit;
    }

    my $task_list = $monitor->{$event."_list"};
    if ( !$task_list )
    {
        $task_list = $monitor->{$event."_list"} = [];
    }
    push( @$task_list, $task );
}

sub loadTasks
{
    %monitor_hash = ();

    Debug( "Loading tasks\n" );
    # Clear out all old device task lists
    foreach my $unit_code ( sort( keys(%device_hash) ) )
    {
        my $device = $device_hash{$unit_code};
        $device->{ON_list} = [];
        $device->{OFF_list} = [];
    }

    my $sql = "SELECT M.*,T.* from Monitors as M
               INNER JOIN TriggersX10 as T on (M.Id = T.MonitorId)
               WHERE find_in_set( M.Function, 'Modect,Record,Mocord,Nodect' )
                AND M.Enabled = 1
                AND find_IN_set( 'X10', M.Triggers )"
    ;
    my $sth = $dbh->prepare_cached( $sql )
        or Fatal( "Can't prepare '$sql': ".$dbh->errstr() );
    my $res = $sth->execute()
        or Fatal( "Can't execute: ".$sth->errstr() );
    while( my $monitor = $sth->fetchrow_hashref() )
    {
        next if ( !zmMemVerify( $monitor ) ); # Check shared memory ok

        $monitor_hash{$monitor->{Id}} = $monitor;

        if ( $monitor->{Activation} )
        {
            Debug( "$monitor->{Name} has active string '$monitor->{Activation}'\n" );
            foreach my $code_string ( split( /,/, $monitor->{Activation} ) )
            {
                #Debug( "Code string: $code_string\n" );
                my ( $invert, $unit_code, $modifier, $limit )
                   = ( $code_string =~ /^([!~])?(\d+)(?:([+-])(\d+)?)?$/ );
                $limit = 0 if ( !$limit );
                if ( $unit_code )
                {
                    if ( !$modifier || $modifier eq '+' )
                    {
                        addToDeviceList( $unit_code,
                                         "ON",
                                         $monitor,
                                         !$invert ? "start_active"
                                                  : "stop_active",
                                         $limit
                        );
                    }
                    if ( !$modifier || $modifier eq '-' )
                    {
                        addToDeviceList( $unit_code,
                                         "OFF",
                                         $monitor,
                                         !$invert ? "stop_active"
                                                  : "start_active",
                                         $limit
                        );
                    }
                }
            }
        }
        if ( $monitor->{AlarmInput} )
        {
            Debug( "$monitor->{Name} has alarm input string '$monitor->{AlarmInput}'\n" );
            foreach my $code_string ( split( /,/, $monitor->{AlarmInput} ) )
            {
                #Debug( "Code string: $code_string\n" );
                my ( $invert, $unit_code, $modifier, $limit )
                   = ( $code_string =~ /^([!~])?(\d+)(?:([+-])(\d+)?)?$/ );
                $limit = 0 if ( !$limit );
                if ( $unit_code )
                {
                    if ( !$modifier || $modifier eq '+' )
                    {
                        addToDeviceList( $unit_code,
                                         "ON",
                                         $monitor,
                                         !$invert ? "start_alarm"
                                                  : "stop_alarm",
                                         $limit
                        );
                    }
                    if ( !$modifier || $modifier eq '-' )
                    {
                        addToDeviceList( $unit_code,
                                         "OFF",
                                         $monitor,
                                         !$invert ? "stop_alarm"
                                                  : "start_alarm",
                                         $limit
                        );
                    }
                }
            }
        }
        if ( $monitor->{AlarmOutput} )
        {
            Debug( "$monitor->{Name} has alarm output string '$monitor->{AlarmOutput}'\n" );
            foreach my $code_string ( split( /,/, $monitor->{AlarmOutput} ) )
            {
                #Debug( "Code string: $code_string\n" );
                my ( $invert, $unit_code, $modifier, $limit )
                   = ( $code_string =~ /^([!~])?(\d+)(?:([+-])(\d+)?)?$/ );
                $limit = 0 if ( !$limit );
                if ( $unit_code )
                {
                    if ( !$modifier || $modifier eq '+' )
                    {
                        addToMonitorList( $monitor,
                                          "ON",
                                          $unit_code,
                                          !$invert ? "on"
                                                   : "off",
                                          $limit
                        );
                    }
                    if ( !$modifier || $modifier eq '-' )
                    {
                        addToMonitorList( $monitor,
                                          "OFF",
                                          $unit_code,
                                          !$invert ? "off"
                                                   : "on",
                                          $limit
                        );
                    }
                }
            }
        }
        zmMemInvalidate( $monitor );
    }
}

sub addPendingTask
{
    my $task = shift;

    # Check whether we are just extending a previous pending task
    # and remove it if it's there
    foreach my $activation_time ( sort(keys(%pending_tasks) ) )
    {
        my $pending_list = $pending_tasks{$activation_time};
        my $new_pending_list = [];
        foreach my $pending_task ( @$pending_list )
        {
            if ( $task->{type} ne $pending_task->{type} )
            {
                push( @$new_pending_list, $pending_task )
            }
            elsif ( $task->{type} eq "device" )
            {
                if (( $task->{monitor}->{Id} != $pending_task->{monitor}->{Id} )
                || ( $task->{function} ne $pending_task->{function} ))
                {
                    push( @$new_pending_list, $pending_task )
                }
            }
            elsif ( $task->{type} eq "monitor" )
            {
                if (( $task->{device}->{appliance}->unit_code()
                      != $pending_task->{device}->{appliance}->unit_code()
                    )
                    || ( $task->{function} ne $pending_task->{function} )
                )
                {
                    push( @$new_pending_list, $pending_task )
                }
            }
        }
        if ( @$new_pending_list )
        {
            $pending_tasks{$activation_time} = $new_pending_list;
        }
        else
        {
            delete( $pending_tasks{$activation_time} );
        }
    }

    my $end_time = time() + $task->{limit};
    my $pending_list = $pending_tasks{$end_time};
    if ( !$pending_list )
    {
        $pending_list = $pending_tasks{$end_time} = [];
    }
    my $pending_task;
    if ( $task->{type} eq "device" )
    {
        $pending_task = { type=>$task->{type},
                          monitor=>$task->{monitor},
                          function=>$task->{function}
        };
        $pending_task->{function} =~ s/start/stop/;
    }
    elsif ( $task->{type} eq "monitor" )
    {
        $pending_task = { type=>$task->{type},
                          device=>$task->{device},
                          function=>$task->{function}
        };
        $pending_task->{function} =~ s/on/off/;
    }
    push( @$pending_list, $pending_task );
}

sub processTask
{
    my $task = shift;

    if ( $task->{type} eq "device" )
    {
        my ( $instruction, $class ) = ( $task->{function} =~ /^(.+)_(.+)$/ );

        if ( $class eq "active" )
        {
            if ( $instruction eq "start" )
            {
                zmMonitorEnable( $task->{monitor} );
                if ( $task->{limit} )
                {
                    addPendingTask( $task );
                }
            }
            elsif( $instruction eq "stop" )
            {
                zmMonitorDisable( $task->{monitor} );
            }
        }
        elsif( $class eq "alarm" )
        {
            if ( $instruction eq "start" )
            {
                zmTriggerEventOn( $task->{monitor},
                                  0,
                                  main::CAUSE_STRING,
                                  $task->{address}
                );
                if ( $task->{limit} )
                {
                    addPendingTask( $task );
                }
            }
            elsif( $instruction eq "stop" )
            {
                zmTriggerEventCancel( $task->{monitor} );
            }
        }
    }
    elsif( $task->{type} eq "monitor" )
    {
        if ( $task->{function} eq "on" )
        {
            $task->{device}->{appliance}->on();
            if ( $task->{limit} )
            {
                addPendingTask( $task );
            }
        }
        elsif ( $task->{function} eq "off" )
        {
            $task->{device}->{appliance}->off();
        }
    }
}

sub dPrint
{
    my $dbg_level = shift;
    if ( fileno(CLIENT) )
    {
        print CLIENT @_
    }
    if ( $dbg_level == ZoneMinder::Logger::DEBUG )
    {
        Debug( @_ );
    }
    elsif ( $dbg_level == ZoneMinder::Logger::INFO )
    {
        Info( @_ );
    }
    elsif ( $dbg_level == ZoneMinder::Logger::WARNING )
    {
        Warning( @_ );
    }
    elsif ( $dbg_level == ZoneMinder::Logger::ERROR )
    {
        Error( @_ );
    }
    elsif ( $dbg_level == ZoneMinder::Logger::FATAL )
    {
        Fatal( @_ );
    }
}

sub x10listen
{
    foreach my $event ( @_ )
    {
        #print( Data::Dumper( $_ )."\n" );
        if ( $event->house_code() eq $Config{ZM_X10_HOUSE_CODE} )
        {
            my $unit_code = $event->unit_code();
            my $device = $device_hash{$unit_code};
            if ( !$device )
            {
                $device = $device_hash{$unit_code} = { appliance=>$x10->Appliance( unit_code=>$unit_code ),
                                                       status=>'unknown'
                                                     };
            }
            next if ( $event->func() !~ /(?:ON|OFF)/ );
            $device->{status} = $event->func();
            my $task_list = $device->{$event->func()."_list"};
            if ( $task_list )
            {
                foreach my $task ( @$task_list )
                {
                    processTask( $task );
                }
            }
        }
        Info( "Got event - ".$event->as_string()."\n" );
    }
}

1;