# @author Peter Kappelt
# @author Clemens Bergmann
# @author Sebastian Kessler

# @version 1.18

package main;
use strict;
use warnings;

use Data::Dumper;
use JSON;

use TradfriUtils;

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

	$hash->{DefFn}      = 'Tradfri_Define';
	$hash->{UndefFn}    = 'Tradfri_Undef';
	$hash->{SetFn}      = 'Tradfri_Set';
	$hash->{GetFn}      = 'Tradfri_Get';
	$hash->{AttrFn}     = 'Tradfri_Attr';
	$hash->{ReadFn}     = 'Tradfri_Read';
	$hash->{ParseFn}	= 'TradfriDevice_Parse';

	$hash->{Match} = '^subscribedDeviceUpdate::';

	$hash->{AttrList} =
		"usePercentDimming:1,0 "
		. $readingFnAttributes;
}

#messages look like this: (without newlines)
# subscribedDeviceUpdate::device-id::{
#    "lastSeenAt":1501407261,
#    "createdAt":1492280964,
#    "reachabilityState":1,
#    "name":"Fenster Links",
#    "dimvalue":200,
#    "type":"TRADFRI bulb E27 opal 1000lm",
#    "deviceid":65537,
#    "version":"1.1.1.0-5.7.2.0",
#    "manufacturer":"IKEA of Sweden",
#    "onoff":0
# }
sub TradfriDevice_Parse ($$){
	my ($io_hash, $message) = @_;

	my @parts = split('::', $message);

	if(int(@parts) < 3){
		#expecting at least three parts
		return undef;
	}
	
	my $messageID = $parts[1];

	#check if device with the id exists
	if(my $hash = $modules{'TradfriDevice'}{defptr}{$messageID}) 
	{
		# the path returned "Not Found" -> unknown resource, but this message still suits for this device
		if($parts[2] eq "Not Found"){
			$hash->{STATE} = "NotFound";
			return $hash->{NAME};
		}

		#parse the JSON data
		my $jsonData = eval{ JSON->new->utf8->decode($parts[2]) };
		if($@){
			return undef; #the string was probably not valid JSON
		}

		my $manufacturer = $jsonData->{'manufacturer'} || '';
		my $type = $jsonData->{'type'} || '';
		
		#dimvalue is in range 0 - 254
		my $dimvalue = $jsonData->{'dimvalue'} || '0';
		#dimpercent is always in range 0 - 100
		my $dimpercent = int($dimvalue / 2.54 + 0.5);
		$dimpercent = 1 if($dimvalue == 1);
		$dimvalue = $dimpercent if (AttrVal($hash->{NAME}, 'usePercentDimming', 0) == 1);
		
		my $state = 'off';
		if($jsonData->{'onoff'} eq '0'){
			$dimpercent = 0;
		}else{
        	$state = Tradfri_stateString($dimpercent);
        }
		
        my $onoff = ($jsonData->{'onoff'} || '0') ? 'on':'off';
		my $name = $jsonData->{'name'} || '';
		my $createdAt = FmtDateTimeRFC1123($jsonData->{'createdAt'} || '');
		my $reachableState = $jsonData->{'reachabilityState'} || '';
		my $lastSeen = FmtDateTimeRFC1123($jsonData->{'lastSeenAt'} || '');
		my $color = $jsonData->{'color'} || '';
		my $version = $jsonData->{'version'} || '';

		readingsBeginUpdate($hash);
		readingsBulkUpdateIfChanged($hash, 'dimvalue', $dimvalue, 1);
		readingsBulkUpdateIfChanged($hash, 'pct', $dimpercent, 1);
		readingsBulkUpdateIfChanged($hash, 'state', $state, 1);
		readingsBulkUpdateIfChanged($hash, 'name', $name, 1);
		readingsBulkUpdateIfChanged($hash, 'createdAt', $createdAt, 1);
		readingsBulkUpdateIfChanged($hash, 'softwareVersion', $version, 1);
		readingsBulkUpdateIfChanged($hash, 'type', $type, 1);
		readingsBulkUpdateIfChanged($hash, 'manufacturer', $manufacturer, 1);
		readingsBulkUpdateIfChanged($hash, 'reachableState', $reachableState, 1);
		readingsBulkUpdateIfChanged($hash, 'color', $color, 1);
		readingsBulkUpdateIfChanged($hash, 'lastSeen', $lastSeen, 1);
		readingsBulkUpdateIfChanged($hash, 'onoff', $onoff, 1);
		readingsEndUpdate($hash, 1);
	
		#$attr{$hash->{NAME}}{webCmd} = 'pct:toggle:on:off';
		#$attr{$hash->{NAME}}{devStateIcon} = '{(Tradfri_devStateIcon($name),"toggle")}' if( !defined( $attr{$hash->{NAME}}{devStateIcon} ) );
		
		#return the appropriate device's name
		return $hash->{NAME}; 
	}
	
	return undef;
}


1;

=pod

=item device
=item summary controls an IKEA Trådfri device (bulb, panel)
=item summary_DE steuert ein IKEA Trådfri Gerät

=begin html

<a name="TradfriDevice"></a>
<h3>TradfriDevice</h3>
<ul>
    <i>TradfriDevice</i> is a module for controlling a single IKEA Trådfri device. You currently need a gateway for the connection.
    See TradfriGateway.
    <br><br>
    <a name="TradfriDevicedefine"></a>
    <b>Define</b>
    <ul>
        <code>define &lt;name&gt; TradfriDevice &lt;device-address&gt;</code>
        <br><br>
        Example: <code>define trDeviceOne TradfriDevice 65538</code>
        <br><br>
        You can get the ID of the devices by calling "get TradfriGW deviceList" on the gateway device
    </ul>
    <br>
    
    <a name="TradfriDeviceset"></a>
    <b>Set</b><br>
    <ul>
        <code>set &lt;name&gt; &lt;option&gt; [&lt;value&gt;]</code>
        <br><br>
        You can set the following options. See <a href="http://fhem.de/commandref.html#set">commandref#set</a> 
        for more info about the set command.
        <br><br>
        Options:
        <ul>
              <li><i>on</i><br>
                  Turns the device on.<br>The brightness is the one, before the device was turned off</li>
              <li><i>off</i><br>
                  Turn the device off.</li>
              <li><i>dimvalue</i><br>
                  Set the brightness of the device.<br>
                  You need to specify the brightness value as an integer between 0 and 100/254.<br>
                  The largest value depends on the attribute "usePercentDimming".<br>
                  If this attribute is set, the largest value will be 100.<br>
                  By default, it isn't set, so the largest value is 254.<br>
                  A brightness value of 0 turns the device off.<br>
                  If the device is off, and you set a value greater than 0, it will turn on.</li>
              <li><i>color</i>
                  Set the color temperature of a bubl<br>
                  Of course, that only works with bulbs, that can change their color temperature<br>
                  You may pass "warm", "cold", "standard" or a RGB code in the format "RRGGBB"<br>
                  Any RGB code can be set, though the bulb only is able to switch to certain colors.<br>
                  IKEA uses the following RGB codes for their colors. Bulbs I've tested could only be set to those.<br>
				  <ul>
					<li>F1E0B5 for standard</li>
					<li>F5FAF6 for cold</li>
					<li>EFD275 for warm</li>
				  </ul>
				  Other RGB codes than listed here do not work with the current bulb (they only set their color to those three values).
                  </li>
        </ul>
    </ul>
    <br>

    <a name="TradfriDeviceget"></a>
    <b>Get</b><br>
    <ul>
        <code>get &lt;name&gt; &lt;option&gt;</code>
        <br><br>
        You can get the following information about the device. See 
        <a href="http://fhem.de/commandref.html#get">commandref#get</a> for more info about 
        the get command.
		<br><br>
        Options:
        <ul>
              <li><i></i><br>
                  There are no gets implemented</li>
        </ul>
    </ul>
    <br>

    <a name="TradfriDevicereadings"></a>
    <b>Readings</b><br>
    <ul>
        The following readings are displayed for a device. Once there is a change and the connection to the gateway is made, they get updated automatically.
		<br><br>
        Readings:
        <ul>
              <li><i>color</i><br>
                  The color that is set for this bulb. Its value is a hexadecimal code in the format "RRGGBB".<br>
                  If the device doesn't support the change of colors the reading's value will be "0"</li>
              <li><i>createdAt</i><br>
                  A timestamp string, like "Sat, 15 Apr 2017 18:29:24 GMT", that indicates, when the device was paired with the gateway.</li>
              <li><i>dimvalue</i><br>
                  The brightness that is set for this device. It is a integer in the range of 0 to 100/ 254.<br>
                  The greatest dimvalue depends on the attribute "usePercentDimming", see below.</li>
              <li><i>pct</i><br>
                  The brightness that is set for this device in percent.</li>
              <li><i>lastSeen</i><br>
                  A timestamp string, like "Wed, 12 Jul 2017 14:32:06 GMT". I haven't understand the mechanism behind it yet.<br>
                  Communication with the device won't update the lastSeen-timestamp - so I don't get the point of it. This needs some more investigation.</li>
              <li><i>manufacturer</i><br>
                  The device's manufacturer. Since there are only devices from IKEA available yet, it'll surely be "IKEA of Sweden".</li>
              <li><i>name</i><br>
                  The name of the device that you've set in the app.</li>
              <li><i>onoff</i><br>
                  Indicates whether the device is on or off, can be the strings 'on' or 'off'</li>
              <li><i>reachableState</i><br>
                  Indicates whether the gateway is able to connect to the device. This reading's value is either "0" or "1", where "1" indicates reachability.</li>
              <li><i>softwareVersion</i><br>
                  The version of the software that is running on the device.</li>
              <li><i>state</i><br>
                  Indicates, whether the device is on or off. Thus, the reading's value is either "on" or "off", too.</li>
              <li><i>type</i><br>
                  The product type of the device. Is a string like "TRADFRI bulb E27 opal 1000lm"</li>
        </ul>
    </ul>
    <br>
    
    <a name="TradfriDeviceattr"></a>
    <b>Attributes</b>
    <ul>
        <code>attr &lt;name&gt; &lt;attribute&gt; &lt;value&gt;</code>
        <br><br>
        See <a href="http://fhem.de/commandref.html#attr">commandref#attr</a> for more info about 
        the attr command.
        <br><br>
        Attributes:
        <ul>
            <li><i>usePercentDimming</i> 0/1<br>
            	If this attribute is one, the largest value for "set dimvalue" will be 100.<br>
            	Otherwise, the largest value is 254.<br>
            	This attribute is useful, if you need to control the brightness in percent (0-100%)<br>
            	For backward compatibility, it is disabled by default, so the largest dimvalue is 254 by default.
            </li>
        </ul>
    </ul>
</ul>

=end html

=cut