################################################################
#
#  Copyright notice
#
#  (c) 2009 Copyright: Kai 'wusel' Siering (wusel+fhem at uu dot org)
#  All rights reserved
#
#  This code 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.
#
#  The GNU General Public License can be found at
#  http://www.gnu.org/copyleft/gpl.html.
#  A copy is found in the textfile GPL.txt and important notices to the license
#  from the author is found in LICENSE.txt distributed with these scripts.
#
#  This script 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.
#
#  This copyright notice MUST APPEAR in all copies of the script!
###############################################

###########################
# 17_SIS_PMS.pm
# Module for FHEM
#
# Contributed by Kai 'wusel' Siering <wusel+fhem@uu.org> in 2010
# Based in part on work for FHEM by other authors ...
# $Id$
###########################

package main;

use strict;
use warnings;

my $SIS_PMS_cmds ="off on on-till off-till toggle";

sub
SIS_PMS_Initialize($)
{
  my ($hash) = @_;

  $hash->{Match}     = "^socket ..:..:..:..:.. .+ state o.*";
  $hash->{SetFn}     = "SIS_PMS_Set";
#  $hash->{StateFn}   = "SIS_PMS_SetState";
  $hash->{DefFn}     = "SIS_PMS_Define";
  $hash->{UndefFn}   = "SIS_PMS_Undef";
  $hash->{ParseFn}   = "SIS_PMS_Parse";
}


#############################
sub
SIS_PMS_Define($$)
{
  my ($hash, $def) = @_;
  my @a = split("[ \t][ \t]*", $def);

  my $u = "wrong syntax: define <name> SIS_PMS <serial> <socket>";

  return $u if(int(@a) < 4);

  my $serial = $a[2];
  my $socketnr = $a[3];
  my $name = $a[0];
  my $serialnocolon=$serial;
  $serialnocolon =~ s/:/_/g;

  $modules{SIS_PMS}{defptr}{$name}  = $hash;
  $hash->{SERIAL} = $serial;
  $hash->{SOCKET} = $socketnr;
  $hash->{NAME} = $name;
  $modules{SIS_PMS}{defptr}{$serialnocolon . $socketnr} = $hash;
  $hash->{PREV}{STATE} = "undefined";
  AssignIoPort($hash);
}


#############################
sub
SIS_PMS_Undef($$)
{
  my ($hash, $name) = @_;
#
#  foreach my $c (keys %{ $hash->{CODE} } ) {
#    $c = $hash->{CODE}{$c};
#
#    # As after a rename the $name my be different from the $defptr{$c}{$n}
#    # we look for the hash.
#    foreach my $dname (keys %{ $modules{SIS_PMS}{defptr}{$c} }) {
#      delete($modules{SIS_PMS}{defptr}{$c}{$dname})
#        if($modules{SIS_PMS}{defptr}{$c}{$dname} == $hash);
#    }
#  }
  return undef;
}


#############################
sub
SIS_PMS_Parse($$)
{
    my ($hash, $msg) = @_;
    my $serial;
    my $socknr;
    my $sockst;
    my $dummy;
    my $serialnocolon;
    
    
    # Msg format: 
    # ^socket ..:..:..:..:.. . state o.*";

    ($dummy, $serial, $socknr, $dummy, $sockst) = split(' ', $msg);
    $serialnocolon=$serial;
    $serialnocolon =~ s/:/_/g;

    my $def = $modules{SIS_PMS}{defptr}{$serialnocolon . $socknr};
    if($def) {
	Log 5, "SIS_PMS: Found device as " . $def->{NAME};
	if($def->{STATE} ne $sockst) {
	    $def->{READINGS}{PREVSTATE}{TIME} = TimeNow();
	    $def->{READINGS}{PREVSTATE}{VAL} = $def->{STATE};
	    Log 3, "SIS_PMS " . $def->{NAME} ." state changed from " . $def->{STATE} . " to $sockst";
	    $def->{PREV}{STATE} = $def->{STATE};
	    $def->{CHANGED}[0] = $sockst;
	    DoTrigger($def->{NAME}, undef);
	}
	$def->{STATE} = $sockst;
	$def->{READINGS}{state}{TIME} = TimeNow();
	$def->{READINGS}{state}{VAL} = $sockst;
	Log 5, "SIS_PMS " . $def->{NAME} ." state $sockst";

	return $def->{NAME};
    } else {
	my $devname=$serial;
	
	$devname =~ s/:/_/g;
	Log 3, "SIS_PMS Unknown device $serial $socknr, please define it";
	if(defined($hash->{TMPLABEL})) {
	    $devname=$hash->{TMPLABEL};
	    return "UNDEFINED $devname SIS_PMS $serial $socknr";
	} else {
	    return "UNDEFINED SIS_PMS_$devname.$socknr SIS_PMS $serial $socknr";
	}
    }
}


#############################
sub
SIS_PMS_Do_On_Till($@)
{
  my ($hash, @a) = @_;
  return "Timespec (HH:MM[:SS]) needed for the on-till command" if(@a != 3);

  my ($err, $hr, $min, $sec, $fn) = GetTimeSpec($a[2]);
  return $err if($err);

  my @lt = localtime;
  my $hms_till = sprintf("%02d:%02d:%02d", $hr, $min, $sec);
  my $hms_now = sprintf("%02d:%02d:%02d", $lt[2], $lt[1], $lt[0]);
  if($hms_now ge $hms_till) {
    Log 4, "on-till: won't switch as now ($hms_now) is later than $hms_till";
    return "";
  }

  my @b = ($a[0], "on");
  SIS_PMS_Set($hash, @b);
  my $tname = $hash->{NAME} . "_till";
  CommandDelete(undef, $tname) if($defs{$tname});
  CommandDefine(undef, "$tname at $hms_till set $a[0] off");

}

#############################
sub
SIS_PMS_Do_Off_Till($@)
{
  my ($hash, @a) = @_;
  return "Timespec (HH:MM[:SS]) needed for the off-till command" if(@a != 3);

  my ($err, $hr, $min, $sec, $fn) = GetTimeSpec($a[2]);
  return $err if($err);

  my @lt = localtime;
  my $hms_till = sprintf("%02d:%02d:%02d", $hr, $min, $sec);
  my $hms_now = sprintf("%02d:%02d:%02d", $lt[2], $lt[1], $lt[0]);
  if($hms_now ge $hms_till) {
    Log 4, "off-till: won't switch as now ($hms_now) is later than $hms_till";
    return "";
  }

  my @b = ($a[0], "off");
  SIS_PMS_Set($hash, @b);
  my $tname = $hash->{NAME} . "_till";
  CommandDelete(undef, $tname) if($defs{$tname});
  CommandDefine(undef, "$tname at $hms_till set $a[0] on");

}


###################################
sub
SIS_PMS_Set($@)
{
    my ($hash, @a) = @_;
    my $ret = undef;
    my $na = int(@a);
    
    my $what = lc($a[1]);

    return "no set value specified" if($na < 2 || $na > 3);

    my @cmds=split(" ", $SIS_PMS_cmds);
    my $ncmds=int(@cmds);
    my $i;
    my $known_cmd=0;

    for($i=0; $i<$ncmds; $i++) {
	if($cmds[$i] eq $what) {
	    $known_cmd++;
	}
    }
    if($known_cmd==0) {
	return "Unknown argument $what, choose one of $SIS_PMS_cmds";
    }

    return SIS_PMS_Do_On_Till($hash, @a) if($a[1] eq "on-till");
    return SIS_PMS_Do_Off_Till($hash, @a) if($a[1] eq "off-till");

    my $prevstate=$hash->{STATE};
    my $currstate=$what;

    if($what eq "toggle") {
	if($prevstate eq "on") {
	    $currstate="off";
	} elsif($prevstate eq "off") {
	    $currstate="on";
	}
    }
    
    if($prevstate ne $currstate) {
	$hash->{READINGS}{PREVSTATE}{TIME} = TimeNow();
	$hash->{READINGS}{PREVSTATE}{VAL} = $prevstate;
	Log 3, "SIS_PMS " . $hash->{NAME} ." state changed from $prevstate to $currstate";
	$hash->{PREV}{STATE} = $prevstate;
	$hash->{CHANGED}[0] = $currstate;
	$hash->{STATE} = $currstate;
	$hash->{READINGS}{state}{TIME} = TimeNow();
	$hash->{READINGS}{state}{VAL} = $currstate;
#	DoTrigger($hash->{NAME}, undef);
    }

    my $msg;
    $msg=sprintf("%s %s %s", $hash->{SERIAL}, $hash->{SOCKET}, $what);

    IOWrite($hash, $what, $msg);

    return $ret;
}


1;

=pod
=begin html

<a name="SIS_PMS"></a>

<h3>SIS_PMS</h3>
<ul>
  This module is responsible for handling the actual sockets (power on,
  power off, toggle) on a "Silver Shield Power Manager", see <a href="#SISPM">SISPM</a>
  for how to define access to one (SIS_PMS stands for "Silver Shield Power Manager Socket").
  <br><br>

  <a name="SIS_PMSdefine"></a>
  <b>Define</b>
  <ul>
    <code>define &lt;name&gt; SIS_PMS &lt;serial&gt; &lt;socket&gt;</code>
    <br><br>

   To securely distinguish multiple attached Power Manager devices, the
   serial number of those is used. You get these with "sispmctl -s"&nbsp;- or
   just let autocreate define the sockets attached for you.<br>

   <ul>
   <li><code>&lt;serial&gt;</code> is the serial number of the Power Manager device, see above.</li>
   <li><code>&lt;socket&gt;</code> is a number between 1 and 4 (for a 4 socket model)</li>
   </ul>
   <br>

    Examples:
    <ul>
      <code>define lamp SIS_PMS 01:02:03:04:05 1</code><br>
      <code>define otherlamp SIS_PMS 01:02:03:04:05 3</code><br>
      <code>define tv SIS_PMS 01:01:38:44:55 1</code>
    </ul>
  </ul>
  <br>

  <a name="SIS_PMSset"></a>
  <b>Set </b>
  <ul>
    <code>set &lt;name&gt; &lt;value&gt; [&lt;time&gt;]</code>
    <br><br>
    where <code>value</code> is one of:<br>
    <pre>
    off
    on
    toggle
    on-till           # Special, see the note
    off-till          # Special, see the note
    </pre>
    Examples:
    <ul>
      <code>set lamp on</code><br>
      <code>set lamp1,lamp2,lamp3 on</code><br>
      <code>set lamp1-lamp3 on</code><br>
      <code>set hql_lamp on-till 18:45</code><br>
    </ul>
    <br>
    Notes:
    <ul>
      <li>As an external program is used, a noticeable delay may occur.</li>
      <li>*-till requires an absolute time in the "at" format (HH:MM:SS, HH:MM
      or { &lt;perl code&gt; }, where the perl-code returns a time
          specification).
      If the current time is greater than the specified time, then the
      command is ignored, else an "on" or "off" command, respectively, is
          generated, and for the given time an "off"/"on" command is
      scheduleld via the at command.</li>
    </ul>
  </ul>
  <br>

  <b>Get</b> <ul>N/A</ul><br>

  <a name="SIS_PMSattributes"></a>
  <b>Attributes</b>
  <ul>
    <li><a href="#do_not_notify">do_not_notify</a></li><br>
    <a name="attrdummy"></a>
    <li>dummy<br>
    Set the device attribute dummy to define devices which should not
    output any signals. Associated notifys will be executed if the signal
    is received. Used e.g. to react to a code from a sender, but it will
    not actually switch if triggered in the web frontend.
    </li><br>

    <li><a href="#loglevel">loglevel</a></li><br>
  </ul>
</ul>


=end html
=cut