# $Id:  $
###############################################################################
#
# Developed with Kate
#
#  (c) 2019 Copyright: Marko Oldenburg (leongaultier at gmail dot com)
#  All rights reserved
#
#   Special thanks goes to:
#       - Lippie hourly forecast code
#
#
#  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.
#
#
###############################################################################

package DarkSkyAPI::Weather;
use strict;
use warnings;

use POSIX;
use HttpUtils;

my $missingModul = '';
eval "use JSON;1"
  or $missingModul .=
  "JSON ";    # apt-get install libperl-JSON on Debian and derivatives
eval "use Encode qw(encode_utf8);1" or $missingModul .= "Encode ";

# use Data::Dumper;    # for Debug only
## API URL
use constant URL => 'https://api.darksky.net/forecast/';
use constant VERSION => '0.2.4';

my %codes = (
    'clear-day'           => 32,
    'clear-night'         => 31,
    'rain'                => 11,
    'snow'                => 16,
    'sleet'               => 18,
    'wind'                => 24,
    'fog'                 => 20,
    'cloudy'              => 26,
    'partly-cloudy-day'   => 30,
    'partly-cloudy-night' => 29,
    'hail'                => 17,
    'thunderstorm'        => 4,
    'tornado'             => 0,
);

sub new {
    ### geliefert wird ein Hash
    my ( $class, $argsRef ) = @_;

    my $self = {
        devName => $argsRef->{devName},
        key     => (
            ( defined( $argsRef->{apikey} ) and $argsRef->{apikey} )
            ? $argsRef->{apikey}
            : 'none'
        ),
        cachemaxage => (
            ( defined( $argsRef->{apioptions} ) and $argsRef->{apioptions} )
            ? (
                  ( split( ':', $argsRef->{apioptions} ) )[0] eq 'cachemaxage'
                ? ( split( ':', $argsRef->{apioptions} ) )[1]
                : 900
              )
            : 900
        ),
        lang      => $argsRef->{language},
        lat       => ( split( ',', $argsRef->{location} ) )[0],
        long      => ( split( ',', $argsRef->{location} ) )[1],
        fetchTime => 0,
    };

    $self->{cached} = _CreateForecastRef($self);

    bless $self, $class;
    return $self;
}

sub setFetchTime {
    my $self = shift;

    $self->{fetchTime} = time();
    return 0;
}

sub setRetrieveData {
    my $self = shift;

    _RetrieveDataFromDarkSky($self);
    return 0;
}

sub getFetchTime {
    my $self = shift;

    return $self->{fetchTime};
}

sub getWeather {
    my $self = shift;

    return $self->{cached};
}

sub _RetrieveDataFromDarkSky($) {
    my $self = shift;

    # retrieve data from cache
    if ( ( time() - $self->{fetchTime} ) < $self->{cachemaxage} ) {
        return _CallWeatherCallbackFn($self);
    }

    my $paramRef = {
        timeout  => 15,
        self     => $self,
        callback => \&_RetrieveDataFinished,
    };

    if (   $self->{lat} eq 'error'
        or $self->{long} eq 'error'
        or $self->{key} eq 'none'
        or $missingModul )
    {
        _RetrieveDataFinished(
            $paramRef,
'The given location is invalid. (wrong latitude or longitude?) put both as an attribute in the global device or set define option location=[LAT],[LONG]',
            undef
        ) if ( $self->{lat} eq 'error' or $self->{long} eq 'error' );

        _RetrieveDataFinished( $paramRef,
            'No given api key. (define  myWeather Weather apikey=[KEY])',
            undef )
          if ( $self->{key} eq 'none' );

        _RetrieveDataFinished( $paramRef,
            'Perl modul ' . $missingModul . ' is missing.', undef )
          if ($missingModul);
    }
    else {
        $paramRef->{url} =
            URL
          . $self->{key} . '/'
          . $self->{lat} . ','
          . $self->{long}
          . '?lang='
          . $self->{lang}
          . '&units=auto';

        main::HttpUtils_NonblockingGet($paramRef);
    }
}

sub _RetrieveDataFinished($$$) {
    my ( $paramRef, $err, $response ) = @_;
    my $self = $paramRef->{self};

    if ( !$err ) {
        $self->{cached}->{status} = 'ok';
        $self->{cached}->{validity} = 'up-to-date', $self->{fetchTime} = time();
        _ProcessingRetrieveData( $self, $response );
    }
    else {
        $self->{fetchTime} = time() if ( not defined( $self->{fetchTime} ) );
        _ErrorHandling( $self, $err );
        _ProcessingRetrieveData( $self, $response );
    }
}

sub _ProcessingRetrieveData($$) {
    my ( $self, $response ) = @_;

    if (    $self->{cached}->{status} eq 'ok'
        and defined($response)
        and $response )
    {
        if ( $response =~ m/^{.*}$/ ) {
            my $data = eval { decode_json($response) };

            if ($@) {
                _ErrorHandling( $self, 'DarkSky Weather decode JSON err ' . $@ );
            }
            elsif ( defined( $data->{code} )
                and $data->{code}
                and defined( $data->{error} )
                and $data->{error} )
            {
                _ErrorHandling( $self,
                    'Code: ' . $data->{code} . ' Error: ' . $data->{error} );
            }
            else {
                #             print Dumper $data;       ## für Debugging

                $self->{cached}->{current_date_time} =
                strftime( "%a, %e %b %Y %H:%M",
                    localtime( $self->{fetchTime} ) );
                $self->{cached}->{timezone} = $data->{timezone};
                $self->{cached}->{license}{text} =
                $data->{flags}->{'meteoalarm-license'};
                $self->{cached}->{current} = {
                    'temperature' => int(
                        sprintf( "%.1f", $data->{currently}->{temperature} ) + 0.5
                    ),
                    'temp_c' => int(
                        sprintf( "%.1f", $data->{currently}->{temperature} ) + 0.5
                    ),
                    'dewPoint' => int(
                        sprintf( "%.1f", $data->{currently}->{dewPoint} ) + 0.5
                    ),
                    'humidity'  => $data->{currently}->{humidity} * 100,
                    'condition' => encode_utf8( $data->{currently}->{summary} ),
                    'pressure'  => int(
                        sprintf( "%.1f", $data->{currently}->{pressure} ) + 0.5
                    ),
                    'wind' => int(
                        sprintf( "%.1f", ($data->{currently}->{windSpeed} * 3.6) ) + 0.5
                    ),
                    'wind_speed' => int(
                        sprintf( "%.1f", ($data->{currently}->{windSpeed} * 3.6) ) + 0.5
                    ),
                    'wind_direction' => $data->{currently}->{windBearing},
                    'windGust'       => int(
                        sprintf( "%.1f", ($data->{currently}->{windGust} * 3.6) ) + 0.5
                    ),
                    'cloudCover' => $data->{currently}->{cloudCover} * 100,
                    'uvIndex'    => $data->{currently}->{uvIndex},
                    'visibility' => int(
                        sprintf( "%.1f", $data->{currently}->{visibility} ) + 0.5
                    ),
                    'ozone'   => $data->{currently}->{ozone},
                    'code'    => $codes{ $data->{currently}->{icon} },
                    'iconAPI' => $data->{currently}->{icon},
                    'pubDate' => strftime(
                        "%a, %e %b %Y %H:%M",
                        localtime( $data->{currently}->{'time'} )
                    ),
                    'precipProbability' => $data->{currently}->{precipProbability} * 100,
                    'apparentTemperature' => int(
                        sprintf(
                            "%.1f", $data->{currently}->{apparentTemperature}
                        ) + 0.5
                    ),
                    'precipIntensity' => $data->{currently}->{precipIntensity},
                };

                if ( ref( $data->{daily}->{data} ) eq "ARRAY"
                    and scalar( @{ $data->{daily}->{data} } ) > 0 )
                {
                    ### löschen des alten Datensatzes
                    delete $self->{cached}->{forecast};

                    my $i = 0;
                    foreach ( @{ $data->{daily}->{data} } ) {
                        push(
                            @{ $self->{cached}->{forecast}->{daily} },
                            {
                                'pubDate' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{'time'}
                                    )
                                ),
                                'day_of_week' => strftime(
                                    "%a",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{'time'}
                                    )
                                ),
                                'low_c' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureLow} ) + 0.5
                                ),
                                'high_c' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureHigh} ) + 0.5
                                ),
                                'tempLow' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureLow} ) + 0.5
                                ),
                                'tempLowTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureLowTime}
                                    )
                                ),
                                'tempHigh' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureHigh} ) + 0.5
                                ),
                                'tempHighTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]
                                        ->{temperatureHighTime}
                                    )
                                ),
                                'apparentTempLow' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{apparentTemperatureLow} ) + 0.5
                                ),
                                'apparentTempLowTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]
                                        ->{apparentTemperatureLowTime}
                                    )
                                ),
                                'apparentTempHigh' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]
                                        ->{apparentTemperatureHigh} ) + 0.5
                                ),
                                'apparentTempHighTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]
                                        ->{apparentTemperatureHighTime}
                                    )
                                ),
                                'code' =>
                                $codes{ $data->{daily}->{data}->[$i]->{icon} },
                                'iconAPI'   => $data->{daily}->{data}->[$i]->{icon},
                                'condition' => encode_utf8(
                                    $data->{daily}->{data}->[$i]->{summary}
                                ),
                                'ozone' => $data->{daily}->{data}->[$i]->{ozone},
                                'uvIndex' =>
                                    $data->{daily}->{data}->[$i]->{uvIndex},
                                'uvIndexTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{uvIndexTime}
                                    )
                                ),
                                'dewPoint' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]->{dewPoint} )
                                    + 0.5
                                ),
                                'humidity' =>
                                    $data->{daily}->{data}->[$i]->{humidity} * 100,
                                'cloudCover' =>
                                    $data->{daily}->{data}->[$i]->{cloudCover} * 100,
                                'wind_direction' =>
                                    $data->{daily}->{data}->[$i]->{windBearing},
                                'wind' => int(
                                    sprintf( "%.1f",
                                        ($data->{daily}->{data}->[$i]->{windSpeed} * 3.6) )
                                    + 0.5
                                ),
                                'wind_speed' => int(
                                    sprintf( "%.1f",
                                        ($data->{daily}->{data}->[$i]->{windSpeed} * 3.6) )
                                    + 0.5
                                ),
                                'windGust' => int(
                                    sprintf( "%.1f",
                                        ($data->{daily}->{data}->[$i]->{windGust} * 3.6) )
                                    + 0.5
                                ),
                                'windGustTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{windGustTime}
                                    )
                                ),
                                'moonPhase' =>
                                    $data->{daily}->{data}->[$i]->{moonPhase},
                                'sunsetTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{sunsetTime}
                                    )
                                ),
                                'sunriseTime' => strftime(
                                    "%a, %e %b %Y %H:%M",
                                    localtime(
                                        $data->{daily}->{data}->[$i]->{sunriseTime}
                                    )
                                ),
                                'pressure' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]->{pressure} )
                                    + 0.5
                                ),
                                'visibility' => int(
                                    sprintf( "%.1f",
                                        $data->{daily}->{data}->[$i]->{visibility} )
                                    + 0.5
                                ),
                            }
                        );

                        $self->{cached}->{forecast}->{daily}[$i]{precipIntensityMax} = ( defined($data->{daily}->{data}->[$i]->{precipIntensityMax}) ? $data->{daily}->{data}->[$i]->{precipIntensityMax} : '-' );
                        $self->{cached}->{forecast}->{daily}[$i]{precipIntensity} = ( defined($data->{daily}->{data}->[$i]->{precipIntensity}) ? $data->{daily}->{data}->[$i]->{precipIntensity} : '-' );  
                        $self->{cached}->{forecast}->{daily}[$i]{precipProbability} = ( defined($data->{daily}->{data}->[$i]->{precipProbability}) ? $data->{daily}->{data}->[$i]->{precipProbability} * 100 : '-' );
                        $self->{cached}->{forecast}->{daily}[$i]{precipType} = ( defined($data->{daily}->{data}->[$i]->{precipType}) ? $data->{daily}->{data}->[$i]->{precipType} : '-' );
                        $self->{cached}->{forecast}->{daily}[$i]{precipIntensityMaxTime} = ( defined($data->{daily}->{data}->[$i]->{precipIntensityMaxTime}) ? strftime("%a, %e %b %Y %H:%M",localtime($data->{daily}->{data}->[$i]->{precipIntensityMaxTime}) ) : '-' );

                        $i++;
                    }

                    if ( ref( $data->{hourly}->{data} ) eq "ARRAY"
                        and scalar( @{ $data->{hourly}->{data} } ) > 0 )
                    {
                        ### löschen des alten Datensatzes
                        delete $self->{cached}->{forecast}->{hourly};

                        my $i = 0;
                        foreach ( @{ $data->{hourly}->{data} } ) {
                            push(
                                @{ $self->{cached}->{forecast}->{hourly} },
                                {
                                    'pubDate' => strftime(
                                        "%a, %e %b %Y %H:%M",
                                        localtime(
                                            $data->{hourly}->{data}->[$i]->{'time'}
                                        )
                                    ),
                                    'day_of_week' => strftime(
                                        "%a, %H:%M",
                                        localtime(
                                            $data->{hourly}->{data}->[$i]->{'time'}
                                        )
                                    ),
                                    'temperature' => sprintf( "%.1f", $data->{hourly}->{data}->[$i]->{temperature} ),
                                    'code' =>
                                    $codes{ $data->{hourly}->{data}->[$i]->{icon} },
                                    'iconAPI'   => $data->{hourly}->{data}->[$i]->{icon},
                                    'condition' => encode_utf8(
                                        $data->{hourly}->{data}->[$i]->{summary}
                                    ),
                                    'ozone' => $data->{hourly}->{data}->[$i]->{ozone},
                                    'uvIndex' =>
                                    $data->{hourly}->{data}->[$i]->{uvIndex},
                                    'dewPoint' => sprintf( "%.1f",
                                            $data->{hourly}->{data}->[$i]->{dewPoint} ),
                                    'humidity' =>
                                    $data->{hourly}->{data}->[$i]->{humidity} * 100,
                                    'cloudCover' =>
                                    $data->{hourly}->{data}->[$i]->{cloudCover} * 100,
                                    'wind_direction' =>
                                    $data->{hourly}->{data}->[$i]->{windBearing},
                                    'wind' => int(
                                        sprintf( "%.1f",
                                            ($data->{hourly}->{data}->[$i]->{windSpeed} * 3.6) )
                                        + 0.5
                                    ),
                                    'wind_speed' => int(
                                        sprintf( "%.1f",
                                            ($data->{hourly}->{data}->[$i]->{windSpeed} * 3.6) )
                                        + 0.5
                                    ),
                                    'windGust' => int(
                                        sprintf( "%.1f",
                                            ($data->{hourly}->{data}->[$i]->{windGust} * 3.6) )
                                        + 0.5
                                    ),
                                    
                                    'pressure' => sprintf( "%.1f",
                                            $data->{hourly}->{data}->[$i]->{pressure} ),
                                    'visibility' => sprintf( "%.1f",
                                            $data->{hourly}->{data}->[$i]->{visibility} ),
                                }
                            );

                            $self->{cached}->{forecast}->{hourly}[$i]{precipIntensity} = ( defined($data->{hourly}->{data}->[$i]->{precipIntensity}) ? $data->{hourly}->{data}->[$i]->{precipIntensity} : '-' );  
                            $self->{cached}->{forecast}->{hourly}[$i]{precipProbability} = ( defined($data->{hourly}->{data}->[$i]->{precipProbability}) ? $data->{hourly}->{data}->[$i]->{precipProbability} * 100 : '-' );
                            $self->{cached}->{forecast}->{hourly}[$i]{precipType} = ( defined($data->{hourly}->{data}->[$i]->{precipType}) ? $data->{hourly}->{data}->[$i]->{precipType} : '-' );

                            $i++;
                        }
                    }
                }
            }
        }
        else { _ErrorHandling( $self, 'DarkSky Weather ' . $response ); }
    }

    ## Aufruf der callbackFn
    _CallWeatherCallbackFn($self);
}

sub _CallWeatherCallbackFn($) {
    my $self = shift;

    #     ## Aufruf der callbackFn
    main::Weather_RetrieveCallbackFn( $self->{devName} );
}

sub _ErrorHandling($$) {
    my ( $self, $err ) = @_;

    $self->{cached}->{current_date_time} =
      strftime( "%a, %e %b %Y %H:%M", localtime( $self->{fetchTime} ) ),
      $self->{cached}->{status} = $err;
    $self->{cached}->{validity} = 'stale';
}

sub _CreateForecastRef($) {
    my $self = shift;

    my $forecastRef = (
        {
            lat  => $self->{lat},
            long => $self->{long},
            apiMaintainer =>
'Leon Gaultier (<a href=https://forum.fhem.de/index.php?action=profile;u=13684>CoolTux</a>)',
            apiVersion => VERSION,
        }
    );

    return $forecastRef;
}

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

1;