#! /usr/bin/perl

use strict;
use warnings;
use LWP::Simple;
use JSON;
binmode STDOUT, ':encoding(UTF-8)';
use utf8;

my $ISP_DIR = './isp/';
my $API_URL = 'https://db.ffdn.org/api/v1/isp/?per_page=9999';
my $isp_data;
my $ffdn_members         = 0;
my $ffdn_subscribers     = 0;
my @required_json_fields = qw(memberCount subscriberCount website chatrooms progressStatus creationDate ffdnMemberSince email description);

# Fetch data from db.ffdn.org
sub fetch_data {
    $isp_data = decode_json get $API_URL;

    # How many members/subscribers in the whole federation?
    map { ${ $_ }{is_ffdn_member} == 1 and defined ${ $_ }{ispformat}{subscriberCount} and $ffdn_subscribers += ${ $_ }{ispformat}{subscriberCount} } @{${ $isp_data }{isps}};
    map { ${ $_ }{is_ffdn_member} == 1 and defined ${ $_ }{ispformat}{memberCount}     and $ffdn_members     += ${ $_ }{ispformat}{memberCount} }     @{${ $isp_data }{isps}};

    # Defaults to N/A if the field doesn't exist.
    foreach my $field (@required_json_fields) {
        map { ${ $_ }{is_ffdn_member} == 1 and defined ${ $_ }{ispformat}{$field} or ${ $_ }{ispformat}{$field}='N/A' } @{${ $isp_data }{isps}};
    }
    return 0;
}

# Updates files used by UneFede in $ISP_DIR
sub update_files {

    open my $ffdn_adh_fh, '>', "$ISP_DIR/ffdn.adh";
    printf {$ffdn_adh_fh} "La fédé compte $ffdn_members adhérent·e·s (et $ffdn_subscribers abonné·e·s). C'est un ratio de %.1f%%. ", $ffdn_subscribers / $ffdn_members * 100;
    close $ffdn_adh_fh;

    foreach my $fede_isp ( grep { ${ $_ }{is_ffdn_member} == 1 } @{${ $isp_data }{isps}} ) {
        my $ispformat = ${ $fede_isp }{ispformat};

        # We're using shortname if it exists. Otherwise we'll default to name.
        my $isp = defined ${ $ispformat }{shortname} ? lc ${ $ispformat }{shortname} : lc ${ $ispformat }{name};

        # isp.adh
        my $subscribers = ${ $ispformat }{subscriberCount};
        my $members     = ${ $ispformat }{memberCount};
        my $string ="$members adhérent·e·s (et $subscribers abonné·e·s). ";
        if ( $members ne 'N/A' and $subscribers ne 'N/A' ) {
            $members > 0 and $string .= sprintf 'C\'est un ratio de %.1f%%. ', $subscribers / $members * 100;
            $string .= sprintf 'Cela représente %.1f%% et %.1f%% des adhésions et des abonnements dans la fédération.', $members / $ffdn_members *100, $subscribers / $ffdn_subscribers * 100;
        }
        open my $adh_fh, '>', "$ISP_DIR/$isp.adh";
        print {$adh_fh} $string;
        close $adh_fh;

        # isp.info
        ${ $ispformat }{description}     ne 'N/A' and $string  = "${ $ispformat }{description}. ";
        ${ $ispformat }{website}         ne 'N/A' and $string .= "Site : ${ $ispformat }{website}. ";
        ${ $ispformat }{chatrooms}       ne 'N/A' and $string .= 'Salon de discussion : ' . @{ $ispformat }{chatrooms} . '. ';
        ${ $ispformat }{email}           ne 'N/A' and $string .= "Adresse de contact : ${ $ispformat }{email}. ";
        ${ $ispformat }{creationDate}    ne 'N/A' and $string .= "Créé le ${ $ispformat }{creationDate}. ";
        ${ $ispformat }{ffdnMemberSince} ne 'N/A' and $string .= "Il a rejoint la fédé le ${ $ispformat }{ffdnMemberSince}. ";
        open my $info_fh, '>', "$ISP_DIR/$isp.info";
        print {$info_fh} $string;
        close $info_fh;
    }
    return 0;
}

fetch_data;
update_files;