###############################################################################
# 
# Developed with Kate
#
#  (c) 2017 Copyright: Marko Oldenburg (leongaultier at gmail dot com)
#  All rights reserved
#
#   Special thanks goes to comitters:
#       - Olaf Schnicke
#
#
#  This script 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
#  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.
#
#
# $Id$
#
###############################################################################

#################################
######### Wichtige Hinweise und Links #################


##
#


################################


package main;

use strict;
use warnings;

use JSON qw(decode_json);
use Encode qw(encode_utf8);
use Net::Telnet;


my $version = "0.1.55";


my %heosCmds = (
    'enableChangeEvents'        => 'system/register_for_change_events?enable=',
    'checkAccount'              => 'system/check_account',
    'signAccountIn'             => 'system/sign_in?',
    'signAccountOut'            => 'system/sign_out',
    'reboot'                    => 'system/reboot',
    'getMusicSources'           => 'browse/get_music_sources',
	'browseSource'              => 'browse/browse?',
    'getPlayers'                => 'player/get_players',
    'getGroups'                 => 'group/get_groups',
    'getPlayerInfo'             => 'player/get_player_info?',
    'getGroupInfo'              => 'group/get_group_info?',
    'getPlayState'              => 'player/get_play_state?',
    'getPlayMode'               => 'player/get_play_mode?',
    'clearQueue'                => 'player/clear_queue?',
	'saveQueue'                 => 'player/save_queue?',
    'getVolume'                 => 'player/get_volume?',
    'getGroupVolume'            => 'group/get_volume?',
    'setPlayState'              => 'player/set_play_state?',
    'setPlayMode'               => 'player/set_play_mode?',
    'setMute'                   => 'player/set_mute?',
    'playNext'                  => 'player/play_next?',
	'playPrev'                  => 'player/play_prev?',
	'playPresetStation'         => 'browse/play_preset?',
	'playInput'                 => 'browse/play_input?',
	'playStream'                => 'browse/play_stream?',
	'playPlaylist'              => 'browse/add_to_queue?',
    'setVolume'                 => 'player/set_volume?',
    'setGroupVolume'            => 'group/set_volume?',
    'volumeUp'                  => 'player/volume_up?',
    'volumeDown'                => 'player/volume_down?',
    'GroupVolumeUp'             => 'group/volume_up?',
    'GroupVolumeDown'           => 'group/volume_down?',
    'getNowPlayingMedia'        => 'player/get_now_playing_media?',
    'eventChangeVolume'         => 'event/player_volume_changed',
    'createGroup'               => 'group/set_group?'
);




# Declare functions
sub HEOSMaster_Initialize($);
sub HEOSMaster_Define($$);
sub HEOSMaster_Undef($$);
sub HEOSMaster_Set($@);
sub HEOSMaster_Open($);
sub HEOSMaster_Close($);
sub HEOSMaster_Read($);
sub HEOSMaster_Write($@);
sub HEOSMaster_Attr(@);
sub HEOSMaster_firstRun($);
sub HEOSMaster_ResponseProcessing($$);
sub HEOSMaster_WriteReadings($$);
sub HEOSMaster_GetPlayers($);
sub HEOSMaster_EnableChangeEvents($);
sub HEOSMaster_PreProcessingReadings($$);
sub HEOSMaster_ReOpen($);
sub HEOSMaster_ReadPassword($);
sub HEOSMaster_StorePassword($$);
sub HEOSMaster_GetGroups($);
sub HEOSMaster_ProcessRead($$);
sub HEOSMaster_ParseMsg($$);
sub HEOSMaster_CheckAccount($);
sub HEOSMaster_Get($$@);
sub HEOSMaster_GetFavorites($);
sub HEOSMaster_GetHistory($);
sub HEOSMaster_GetInputs($);
sub HEOSMaster_GetMusicSources($);
sub HEOSMaster_GetPlaylists($);
sub HEOSMaster_GetServers($);




sub HEOSMaster_Initialize($) {

    my ($hash) = @_;
    
    # Provider
    $hash->{ReadFn}     =   "HEOSMaster_Read";
    $hash->{WriteFn}    =   "HEOSMaster_Write";
    $hash->{Clients}    =   ":HEOSPlayer:";
    $hash->{MatchList}  = { "1:HEOSPlayer"      => '.*{"command":."player.*|.*{"command":."event\/player.*|.*{"command":."event\/repeat_mode_changed.*|.*{"command":."event\/shuffle_mode_changed.*|.*{"command":."event\/favorites_changed.*',
                            "2:HEOSGroup"       => '.*{"command":."group.*'
                            };


    # Consumer
    $hash->{SetFn}      = "HEOSMaster_Set";
    $hash->{GetFn}      = "HEOSMaster_Get";
    $hash->{DefFn}      = "HEOSMaster_Define";
    $hash->{UndefFn}    = "HEOSMaster_Undef";
    $hash->{AttrFn}     = "HEOSMaster_Attr";
    $hash->{AttrList}   = "disable:1 ".
                          "heosUsername ".
                          $readingFnAttributes;


    foreach my $d(sort keys %{$modules{HEOSMaster}{defptr}}) {
        my $hash = $modules{HEOSMaster}{defptr}{$d};
        $hash->{VERSION} 	= $version;
    }
}

sub HEOSMaster_Define($$) {

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

    return "too few parameters: define <name> HEOSMaster <HOST>" if( @a != 3 );
    


    my $name            = $a[0];
    my $host            = $a[2];

    $hash->{HOST}       = $host;
    $hash->{VERSION}    = $version;


    Log3 $name, 3, "HEOSMaster ($name) - defined with host $host";

    $attr{$name}{room} = "HEOS" if( !defined( $attr{$name}{room} ) );
    
    readingsBeginUpdate($hash);
    readingsBulkUpdate($hash,'state','Initialized');
    readingsBulkUpdate($hash,'enableChangeEvents', 'off');
    readingsEndUpdate($hash,1);
    
    
    if( $init_done ) {
    
        HEOSMaster_firstRun($hash);
        
    } else {
    
        InternalTimer( gettimeofday()+15, 'HEOSMaster_firstRun', $hash, 0 ) if( ($hash->{HOST}) );
    }
    
    $modules{HEOSPlayer}{defptr}{$host} = $hash;
    
    return undef;
}

sub HEOSMaster_Undef($$) {

    my ( $hash, $arg ) = @_;
    
    my $host = $hash->{HOST};
    my $name = $hash->{NAME};
    
    HEOSMaster_Close($hash);
    delete $modules{HEOSMaster}{defptr}{$hash->{HOST}};
    
    Log3 $name, 3, "HEOSPlayer ($name) - device $name deleted";
    
    return undef;
}

sub HEOSMaster_Attr(@) {

    my ( $cmd, $name, $attrName, $attrVal ) = @_;
    my $hash = $defs{$name};
    
    my $orig = $attrVal;

    
    if( $attrName eq "disable" ) {
        if( $cmd eq "set" and $attrVal eq "1" ) {
            readingsSingleUpdate ( $hash, "state", "disabled", 1 );
            Log3 $name, 3, "HEOSMaster ($name) - disabled";
        }

        elsif( $cmd eq "del" ) {
            readingsSingleUpdate ( $hash, "state", "active", 1 );
            Log3 $name, 3, "HEOSMaster ($name) - enabled";
        }
    }
    
    if( $attrName eq "disabledForIntervals" ) {
        if( $cmd eq "set" ) {
            Log3 $name, 3, "HEOSMaster ($name) - enable disabledForIntervals";
            readingsSingleUpdate ( $hash, "state", "Unknown", 1 );
        }

        elsif( $cmd eq "del" ) {
            readingsSingleUpdate ( $hash, "state", "active", 1 );
            Log3 $name, 3, "HEOSMaster ($name) - delete disabledForIntervals";
        }
    }

    return undef;
}

sub HEOSMaster_Get($$@) {
    my ($hash, $name, @aa) = @_;
    my ($cmd, @args) = @aa;
    
    my $pid     = $hash->{PID};

    if( $cmd eq 'showAccount' ) {
    
        return AttrVal($name,'heosUsername',0) . ":" .HEOSMaster_ReadPassword($hash);
    }

    my $list = 'showAccount:noArg';

    return "Unknown argument $cmd, choose one of $list";
}

sub HEOSMaster_Set($@) {

    my ($hash, $name, $cmd, @args) = @_;
    my ($arg, @params)  = @args;

    my $action;
    my $heosCmd;
    
    if($cmd eq 'reopen') {
        return "usage: reopen" if( @args != 0 );

        HEOSMaster_ReOpen($hash);

        return undef;

    } elsif($cmd eq 'getPlayers') {
        return "usage: getPlayers" if( @args != 0 );

        $heosCmd    = 'getPlayers';
        $action     = undef;
        
    } elsif($cmd eq 'getGroups') {
        return "usage: getGroups" if( @args != 0 );

        $heosCmd    = 'getGroups';
        $action     = undef;
        
    } elsif($cmd eq 'enableChangeEvents') {
        return "usage: enableChangeEvents" if( @args != 1 );

        $heosCmd    = $cmd;
        $action     = $args[0];
        
    } elsif($cmd eq 'checkAccount') {
        return "usage: checkAccount" if( @args != 0 );

        $heosCmd    = $cmd;
        $action     = undef;
        
    } elsif($cmd eq 'signAccount') {
        return "usage: signAccountIn" if( @args != 1 );
        return "please set account informattion first" if(AttrVal($name,'heosUsername','none') eq 'none');

        $heosCmd    = $cmd . $args[0];
        $action     = 'un='. AttrVal($name,'heosUsername','none') . '&pw=' . HEOSMaster_ReadPassword($hash) if($args[0] eq 'In');
    
    } elsif($cmd eq 'password') {
        return "usage: password" if( @args != 1 );

        return HEOSMaster_StorePassword( $hash, $args[0] );
        
    } elsif($cmd eq 'reboot') {
        return "usage: reboot" if( @args != 0 );

        return HEOSMaster_StorePassword( $hash, $args[0] );
        
        
    ###################################################
    ### Dieser Menüpunkt ist nur zum testen
    } elsif($cmd eq 'eventSend') {
            return "usage: eventSend" if( @args != 0 );

            HEOSMaster_send($hash);
            return undef;
    ###################################################
    
            
    } else {
        my  $list = ""; 
        $list .= "reopen:noArg getPlayers:noArg getGroups:noArg enableChangeEvents:on,off checkAccount:noArg signAccount:In,Out password reboot";
        return "Unknown argument $cmd, choose one of $list";
    }
    
    HEOSMaster_Write($hash,$heosCmd,$action);
}

sub HEOSMaster_Open($) {

    my $hash        = shift;
    my $name        = $hash->{NAME};
    my $host        = $hash->{HOST};
    my $port        = 1255;
    my $timeout     = 0.1;
    my $user        = AttrVal($name,'heosUsername',0);
    my $password    = HEOSMaster_ReadPassword($hash);
    
    
    Log3 $name, 4, "HEOSMaster ($name) - Baue Socket Verbindung auf";
    

    my $socket = new Net::Telnet ( Host=>$host,
        Port => $port,
        Timeout=>$timeout,
        Errmode=>'return')
        or return Log3 $name, 3, "HEOSMaster ($name) Couldn't connect to $host:$port";
        
    $hash->{FD}    = $socket->fileno();
    $hash->{CD}    = $socket;         # sysread / close won't work on fileno
    $selectlist{$name} = $hash;
    
    readingsSingleUpdate($hash, 'state', 'connected', 1 );
    
    Log3 $name, 4, "HEOSMaster ($name) - Socket Connected";
    
    
    #hinzugefügt laut Protokoll 2.1.1 Initsequenz
    HEOSMaster_Write($hash,'enableChangeEvents','off');
    Log3 $name, 4, "HEOSMaster ($name) - set enableChangeEvents off";	
    
    #hinzugefügt laut Protokoll 2.1.1 Initsequenz
    if( defined($user) and defined($password) ) {
    
        HEOSMaster_Write($hash,'signAccountIn',"un=$user&pw=$password");
        Log3 $name, 4, "HEOSMaster ($name) - sign in";	
    }
    
    
    HEOSMaster_GetPlayers($hash);
    InternalTimer( gettimeofday()+1, 'HEOSMaster_EnableChangeEvents', $hash, 0 );
    InternalTimer( gettimeofday()+2, 'HEOSMaster_GetMusicSources', $hash, 0 );
}

sub HEOSMaster_Close($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    return if( !$hash->{CD} );

    close($hash->{CD}) if($hash->{CD});
    delete($hash->{FD});
    delete($hash->{CD});
    delete($selectlist{$name});
    readingsSingleUpdate($hash, 'state', 'not connected', 1 );
}

sub HEOSMaster_ReOpen($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    
    HEOSMaster_Close($hash);
    HEOSMaster_Open($hash) if( !$hash->{CD} or !defined($hash->{CD}) );
}

sub HEOSMaster_Write($@) {

    my ($hash,$heosCmd,$value)  = @_;
    my $name                    = $hash->{NAME};
    
    
    my $string  = "heos://$heosCmds{$heosCmd}";
    
    if( defined($value) ) {
        $string    .= "${value}" if( $value ne '&' );
    }
    
    $string    .= "\r\n";
    
    Log3 $name, 4, "HEOSMaster ($name) - WriteFn called";
    
    return Log3 $name, 4, "HEOSMaster ($name) - socket not connected"
    unless($hash->{CD});

    Log3 $name, 5, "HEOSMaster ($name) - $string";
    syswrite($hash->{CD}, $string);
    return undef;
}

sub HEOSMaster_Read($) {

    my $hash = shift;
    my $name = $hash->{NAME};
    
    my $len;
    my $buf;
    
    
    Log3 $name, 4, "HEOSMaster ($name) - ReadFn gestartet";

    $len = sysread($hash->{CD},$buf,1024);          # die genaue Puffergröße wird noch ermittelt
    
    if( !defined($len) || !$len ) {
        Log3 $name, 5, "HEOSMaster ($name) - connection closed by remote Host";
        HEOSMaster_Close($hash);
        return;
    }
    
	unless( defined $buf) { 
        Log3 $name, 3, "HEOSMaster ($name) - Keine Daten empfangen";
        return; 
    }


    Log3 $name, 5, "HEOSMaster ($name) - received buffer data, start HEOSMaster_ProcessRead: $buf";
    HEOSMaster_ProcessRead($hash,$buf);
}

sub HEOSMaster_ProcessRead($$) {

    my ($hash, $data) = @_;
    my $name = $hash->{NAME};
    
    my $buffer = '';
    
    
    Log3 $name, 4, "HEOSMaster ($name) - process read";

    #include previous partial message
    if(defined($hash->{PARTIAL}) && $hash->{PARTIAL}) {
    
        Log3 $name, 5, "HEOSMaster ($name) - PARTIAL: " . $hash->{PARTIAL};
        $buffer = $hash->{PARTIAL};
        
    } else {
    
        Log3 $name, 4, "HEOSMaster ($name) - No PARTIAL buffer";
    }
  
    Log3 $name, 5, "HEOSMaster ($name) - Incoming data: " . $data;
  
    $buffer = $buffer  . $data;
    Log3 $name, 5, "HEOSMaster ($name) - Current processing buffer (PARTIAL + incoming data): " . $buffer;

    my ($json,$tail) = HEOSMaster_ParseMsg($hash, $buffer);
    
    
    #processes all complete messages
    while($json) {
    
        $hash->{LAST_RECV} = time();
        
        Log3 $name, 5, "HEOSMaster ($name) - Decoding JSON message. Length: " . length($json) . " Content: " . $json;
        
        my $obj = JSON->new->utf8(0)->decode($json);
        if(defined($obj->{heos})) {
        
            HEOSMaster_ResponseProcessing($hash,$json);
            Log3 $name, 4, "HEOSMaster ($name) - starte HEOSMaster_ResponseProcessing";
            
        } elsif(defined($obj->{error})) {
        
            Log3 $name, 3, "HEOSMaster ($name) - Received error message: " . $json;
        }
        
        ($json,$tail) = HEOSMaster_ParseMsg($hash, $tail);
    }
    
    $hash->{PARTIAL} = $tail;
    
    
    Log3 $name, 5, "HEOSMaster ($name) - Tail: " . $tail;
    Log3 $name, 5, "HEOSMaster ($name) - PARTIAL: " . $hash->{PARTIAL};
    
    return;
}

sub HEOSMaster_ResponseProcessing($$) {

    my ($hash,$json)    = @_;
    my $name            = $hash->{NAME};
    
    my $decode_json;
    

    Log3 $name, 5, "HEOSMaster ($name) - JSON String: $json";

    return Log3 $name, 3, "HEOSMaster ($name) - empty answer received"
    unless( defined($json));


    Log3 $name, 4, "HEOSMaster ($name) - JSON detected!";
    $decode_json = decode_json(encode_utf8($json));
    
    return Log3 $name, 3, "HEOSMaster ($name) - decode_json has no Hash"
    unless(ref($decode_json) eq "HASH");


    if( (defined($decode_json->{heos}{result}) and defined($decode_json->{heos}{command})) or ($decode_json->{heos}{command} =~ /^system/) ) {
    
        HEOSMaster_WriteReadings($hash,$decode_json);
        Log3 $name, 4, "HEOSMaster ($name) - call Sub HEOSMaster_WriteReadings";

    }

    if( $decode_json->{heos}{command} =~ /^browse\/get_music_sources/ and ref($decode_json->{payload}) eq "ARRAY" and scalar(@{$decode_json->{payload}}) > 0) {
    
        #liest nur die Radioquellen der Rest wird extra eingelesen
        $hash->{helper}{sources} = [];
        my $i = 4;
    
    foreach my $payload ( @{$decode_json->{payload}} ) {
    
            if( $payload->{sid} eq "1024" ) {
            
                $i += 2;
                InternalTimer( gettimeofday()+$i, 'HEOSMaster_GetServers', $hash, 0 );
                Log3 $name, 4, "HEOSMaster ($name) - GetServers in $i seconds";
                
            } elsif( $payload->{sid} eq "1025" ) {
            
                $i += 2;
                InternalTimer( gettimeofday()+$i, 'HEOSMaster_GetPlaylists', $hash, 0 );
                Log3 $name, 4, "HEOSMaster ($name) - GetPlaylists in $i seconds";
                
            } elsif( $payload->{sid} eq "1026" ) {
            
                $i += 2;
                InternalTimer( gettimeofday()+$i, 'HEOSMaster_GetHistory', $hash, 0 );
                Log3 $name, 4, "HEOSMaster ($name) - GetHistory in $i seconds";
                
            } elsif( $payload->{sid} eq "1027" ) {
            
                $i += 2;
                InternalTimer( gettimeofday()+$i, 'HEOSMaster_GetInputs', $hash, 0 );
                Log3 $name, 4, "HEOSMaster ($name) - GetInputs in $i seconds";
                
            } elsif( $payload->{sid} eq "1028" ) {
            
                $i += 2;
                InternalTimer( gettimeofday()+$i, 'HEOSMaster_GetFavorites', $hash, 0 );
                Log3 $name, 4, "HEOSMaster ($name) - GetFavorites in $i seconds";
                
            } else {
            
                #Radios
                push( @{$hash->{helper}{sources}},$payload);
                Log3 $name, 4, "HEOSMaster ($name) - GetRadioSource {$payload->{name} with sid $payload->{sid}";
            }
        }
        
        Log3 $name, 3, "HEOSMaster ($name) - call Sourcebrowser";
        return;
    }

    if( $decode_json->{heos}{command} =~ /^browse\/browse/ and ref($decode_json->{payload}) eq "ARRAY" and scalar(@{$decode_json->{payload}}) > 0) {
    
        my %message  = map split("=",$_), split('&', $decode_json->{heos}{message});
        
        if( exists $message{sid} ) {
            if( $message{sid} eq '1028' ) {
            
                #Favoriten einlesen
                $hash->{helper}{favorites} = $decode_json->{payload};
                my @keys = (keys %defs);				
                my @pids =  map { $_->{PID} } grep { $_->{TYPE} =~ /HEOSPlayer/i } @defs{@keys};
            
                #Nachricht an die Player das die Favoriten sich geändert haben
                foreach my $pid (@pids) {
                
                    $json  =    '{"heos": {"command": "event/favorites_changed", "message": "pid='.$pid.'"}}';
                    Dispatch($hash,$json,undef);
                    Log3 $name, 4, "HEOSMaster ($name) - call Dispatcher for Favorites Changed";
                }
                
            } elsif( $message{sid} eq '1026' ) {
                
                #History einlesen
                $hash->{helper}{history} = $decode_json->{payload};
            
            } elsif( $message{sid} eq '1025' ) {
            
                #Playlisten einlesen
                $hash->{helper}{playlists} = $decode_json->{payload};
            
            } elsif( $message{sid} eq '1027' ) {
                
                #Inputs einlesen
                push( @{$hash->{helper}{sources}}, map { $_->{name} .= " AUX"; $_ }  (@{$decode_json->{payload}}) );
            
            } elsif( $message{sid} eq '1024' ) {
                
                #Lokal einlesen
                push( @{$hash->{helper}{sources}}, map { $_->{name} .= " USB" if ( $_->{sid} < 0 ); $_ }  (@{$decode_json->{payload}}) );
            
            } else {
            
                #aktuellen Input/Media einlesen
                $hash->{helper}{media} = $decode_json->{payload};
            }
            
            Log3 $name, 4, "HEOSMaster ($name) - call Browser with sid $message{sid} and $message{returned} items from $message{count} items";
            
            if( $message{returned} < $message{count} ) {
            
                HEOSMaster_Write($hash,'browseSource',"sid=.$message{sid}&range=.$message{returned}");
                Log3 $name, 3, "HEOSMaster ($name) - call Browser search next Range for $message{sid} => $message{returned}";
            }
            
            return;
        }
    }
    
    #Quellen neu einlesen
    if( $decode_json->{heos}{command} =~ /^event\/sources_changed/ ) {
    
        #InternalTimer( gettimeofday()+5, 'HEOSMaster_GetMusicSources', $hash, 0 );
        HEOSMaster_Write($hash,'getMusicSources',undef);
        Log3 $name, 4, "HEOSMaster ($name) - source changed";
        return;  
    }
    
    #Player neu einlesen
    if( $decode_json->{heos}{command} =~ /^event\/players_changed/ ) {
    
        #InternalTimer( gettimeofday()+5, 'HEOSMaster_GetPlayers', $hash, 0 );
        HEOSMaster_Write($hash,'getPlayers',undef);
        Log3 $name, 4, "HEOSMaster ($name) - player changed";
        return;  
    }
    
    #User neu einlesen
    if( $decode_json->{heos}{command} =~ /^event\/user_changed/ ) {
        #InternalTimer( gettimeofday()+5, 'HEOSMaster_CheckAccount', $hash, 0 );
        HEOSMaster_Write($hash,'checkAccount',undef);
        Log3 $name, 4, "HEOSMaster ($name) - user changed";
        return;
    }

    if( $decode_json->{heos}{command} =~ /^player/ or $decode_json->{heos}{command} =~ /^event\/player/ or $decode_json->{heos}{command} =~ /^group/ or $decode_json->{heos}{command} =~ /^event\/group/ or $decode_json->{heos}{command} =~ /^event\/repeat_mode_changed/ or $decode_json->{heos}{command} =~ /^event\/shuffle_mode_changed/ ) {
    
        if( ref($decode_json->{payload}) eq "ARRAY" ) {
        
            return Log3 $name, 4, "HEOSMaster ($name) - empty ARRAY received"
            unless(scalar(@{$decode_json->{payload}}) > 0);
    
            if( $decode_json->{heos}{command} =~ /^player/ ) {

        
                foreach my $payload (@{$decode_json->{payload}}) {
            
                    $json  =    '{"pid": "';
                    $json .=    "$payload->{pid}";
                    $json .=    '","heos": {"command": "player/get_players"}}';

                    Dispatch($hash,$json,undef);
                    Log3 $name, 4, "HEOSMaster ($name) - call Dispatcher";
                }

                return;
            
            } elsif( $decode_json->{heos}{command} =~ /^group/ ) {
        
        
                foreach my $payload (@{$decode_json->{payload}}) {
            
                    $json  =    '{"gid": "';
                    $json .=    "$payload->{gid}";
                    $json .=    '","heos": {"command": "group/get_groups"}}';

                    Dispatch($hash,$json,undef);
                    Log3 $name, 4, "HEOSMaster ($name) - call Dispatcher";
                }
            
                return;
            }
    
        } elsif( defined($decode_json->{payload}{pid}) ) {
    
            Dispatch($hash,$json,undef);
            Log3 $name, 4, "HEOSMaster ($name) - call Dispatcher";
            return;
            
        } elsif( defined($decode_json->{heos}{message}) and $decode_json->{heos}{message} =~ /^pid=/ ) {
        
            Dispatch($hash,$json,undef);
            Log3 $name, 4, "HEOSMaster ($name) - call Dispatcher";
            return;
            
        }
    } 
    
    Log3 $name, 4, "HEOSMaster ($name) - no Match for processing data";
}

sub HEOSMaster_WriteReadings($$) {

    my ($hash,$decode_json) = @_;
    my $name                = $hash->{NAME};
    my $value;
    
    
    ############################
    #### Aufbereiten der Daten soweit nötig
    
    my $readingsHash    = HEOSMaster_PreProcessingReadings($hash,$decode_json)
    if( $decode_json->{heos}{command} eq 'system/register_for_change_events'
        or $decode_json->{heos}{command} eq 'system/check_account'
        or $decode_json->{heos}{command} eq 'system/sign_in'
        or $decode_json->{heos}{command} eq 'system/sign_out' );
    
    
    ############################
    #### schreiben der Readings
    
    readingsBeginUpdate($hash);
    
    ### Event Readings
    if( ref($readingsHash) eq "HASH" ) {
        
        Log3 $name, 4, "HEOSMaster ($name) - response json Hash back from HEOSMaster_PreProcessingReadings";
        
        my $t;
        my $v;
        while( ( $t, $v ) = each (%{$readingsHash}) ) {
            if( defined( $v ) ) {
            
                readingsBulkUpdate( $hash, $t, $v );
            }
        }
    }


    readingsBulkUpdate( $hash, "lastCommand", $decode_json->{heos}{command} );
    readingsBulkUpdate( $hash, "lastResult", $decode_json->{heos}{result} );
    
    if( ref($decode_json->{payload}) ne "ARRAY" ) {
        readingsBulkUpdate( $hash, "lastPlayerId", $decode_json->{payload}{pid} );
        readingsBulkUpdate( $hash, "lastPlayerName", $decode_json->{payload}{name} );
    }
    
    readingsEndUpdate( $hash, 1 );
    
    return undef;
}

###################
### my little Helpers

sub HEOSMaster_ParseMsg($$) {

    my ($hash, $buffer) = @_;
    
    my $name = $hash->{NAME};
    my $open = 0;
    my $close = 0;
    my $msg = '';
    my $tail = '';
    
    
    if($buffer) {
        foreach my $c (split //, $buffer) {
            if($open == $close && $open > 0) {
                $tail .= $c;
                Log3 $name, 5, "HEOSMaster ($name) - $open == $close && $open > 0";
                
            } elsif(($open == $close) && ($c ne '{')) {
            
                Log3 $name, 5, "HEOSMaster ($name) - Garbage character before message: " . $c;
        
            } else {
      
                if($c eq '{') {

                    $open++;
                
                } elsif($c eq '}') {
                
                    $close++;
                }
                
                $msg .= $c;
            }
        }
        
        if($open != $close) {
    
            $tail = $msg;
            $msg = '';
        }
    }
    
    Log3 $name, 5, "HEOSMaster ($name) - return msg: $msg and tail: $tail";
    return ($msg,$tail);
}

sub HEOSMaster_PreProcessingReadings($$) {

    my ($hash,$decode_json)     = @_;
    my $name                    = $hash->{NAME};
    
    my $reading;
    my %buffer;


    Log3 $name, 4, "HEOSMaster ($name) - preprocessing readings";
    
    
    if ( $decode_json->{heos}{command} eq 'system/register_for_change_events' ) {
        
        my @value     = split('=', $decode_json->{heos}{message});
        $buffer{'enableChangeEvents'}   = $value[1];
        
    } elsif ( $decode_json->{heos}{command} eq 'system/check_account' or $decode_json->{heos}{command} eq 'system/sign_in' ) {
        
        my @value               = split('&', $decode_json->{heos}{message});
        if( $decode_json->{heos}{message} eq 'signed_out' ) {
        
            $buffer{'heosAccount'}  = $value[0];
            
        } else {

            $buffer{'heosAccount'}  = $value[0] . ' as ' . substr($value[1],3);
        }
        
    } else {
    
        Log3 $name, 3, "HEOSMaster ($name) - no match found";
        return undef;
    }
    
    Log3 $name, 4, "HEOSMaster ($name) - Match found for decode_json";
    return \%buffer;
}

sub HEOSMaster_firstRun($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    
    RemoveInternalTimer($hash,'HEOSMaster_firstRun');
    
    HEOSMaster_Open($hash) if( !IsDisabled($name) );
}

sub HEOSMaster_GetPlayers($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    
    RemoveInternalTimer($hash,'HEOSMaster_GetPlayers');
    
    HEOSMaster_Write($hash,'getPlayers',undef);
    Log3 $name, 4, "HEOSMaster ($name) - getPlayers";
}

sub HEOSMaster_GetGroups($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    
    RemoveInternalTimer($hash,'HEOSMaster_GetGroups');
    
    HEOSMaster_Write($hash,'getGroups',undef);
    Log3 $name, 4, "HEOSMaster ($name) - getPlayers";
}

sub HEOSMaster_EnableChangeEvents($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    
    RemoveInternalTimer($hash,'HEOSMaster_EnableChangeEvents');
    
    HEOSMaster_Write($hash,'enableChangeEvents','on');
    Log3 $name, 4, "HEOSMaster ($name) - set enableChangeEvents on";
}

sub HEOSMaster_GetMusicSources($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetMusicSources');

    HEOSMaster_Write($hash,'getMusicSources',undef);
    Log3 $name, 4, "HEOSMaster ($name) - getMusicSources";
    
}

sub HEOSMaster_GetFavorites($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetFavorites');

    HEOSMaster_Write($hash,'browseSource','sid=1028');
    Log3 $name, 4, "HEOSMaster ($name) - getFavorites";    
}

sub HEOSMaster_GetInputs($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetInputs');

    HEOSMaster_Write($hash,'browseSource','sid=1027');
    Log3 $name, 4, "HEOSMaster ($name) - getInputs";    
}

sub HEOSMaster_GetServers($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetServers');

    HEOSMaster_Write($hash,'browseSource','sid=1024');
    Log3 $name, 4, "HEOSMaster ($name) - getServers";    
}

sub HEOSMaster_GetPlaylists($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetPlaylists');

    HEOSMaster_Write($hash,'browseSource','sid=1025');
    Log3 $name, 4, "HEOSMaster ($name) - getPlaylists";    
}

sub HEOSMaster_GetHistory($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_GetHistory');

    HEOSMaster_Write($hash,'browseSource','sid=1026');
    Log3 $name, 4, "HEOSMaster ($name) - getHistory";    
}

sub HEOSMaster_CheckAccount($) {

    my $hash    = shift;
    my $name    = $hash->{NAME};
    
    RemoveInternalTimer($hash, 'HEOSMaster_CheckAccount');

    HEOSMaster_Write($hash,'checkAccount',undef);
    Log3 $name, 4, "HEOSMaster ($name) - checkAccount";    
}

sub HEOSMaster_StorePassword($$) {

    my ($hash, $password) = @_;     
    my $index = $hash->{TYPE}."_".$hash->{NAME}."_passwd";
    my $key = getUniqueId().$index;
    my $enc_pwd = "";
    
    
    if(eval "use Digest::MD5;1") {
    
        $key = Digest::MD5::md5_hex(unpack "H*", $key);
        $key .= Digest::MD5::md5_hex($key);
    }
    
    for my $char (split //, $password) {
    
        my $encode=chop($key);
        $enc_pwd.=sprintf("%.2x",ord($char)^ord($encode));
        $key=$encode.$key;
    }
    
    my $err = setKeyValue($index, $enc_pwd);
    return "error while saving the password - $err" if(defined($err));
    
    return "password successfully saved";
}
   
sub HEOSMaster_ReadPassword($) {

    my ($hash) = @_;
    my $name = $hash->{NAME};
    my $index = $hash->{TYPE}."_".$hash->{NAME}."_passwd";
    my $key = getUniqueId().$index;
    my ($password, $err);

   
    Log3 $name, 4, "HEOSMaster ($name) - Read FritzBox password from file";

    ($err, $password) = getKeyValue($index);

    if ( defined($err) ) {

        Log3 $name, 4, "HEOSMaster ($name) - unable to read FritzBox password from file: $err";
        return undef;
    }  
    
    if ( defined($password) ) {

        if ( eval "use Digest::MD5;1" ) {

            $key = Digest::MD5::md5_hex(unpack "H*", $key);
            $key .= Digest::MD5::md5_hex($key);
        }

        my $dec_pwd = '';
     
        for my $char (map { pack('C', hex($_)) } ($password =~ /(..)/g)) {
      
            my $decode=chop($key);
            $dec_pwd.=chr(ord($char)^ord($decode));
            $key=$decode.$key;
        }
     
        return $dec_pwd;
        
    } else {
    
      Log3 $name, 4, "HEOSMaster ($name) - No password in file";
      return undef;
    }
}




################
### Nur für mich um dem Emulator ein Event ab zu jagen
sub HEOSMaster_send($) {

    my $hash    = shift;
    
    HEOSMaster_Write($hash,'eventChangeVolume',undef);

}









1;