package Mod::GBFSout;
#
# SPDX-License-Identifier: AGPL-3.0-or-later
# Copyright (c) Rainer Gümpelein, TeilRad GmbH
#
#without login only public Stations have to be viewable:
#https://shareeapp-primary.copri-bike.de/GBFSout
#
#with login and valid autcookie:
#https://shareeapp-primary.copri-bike.de/GBFSout?sessionid=a49aba2b5440be72816db2_rafo87znqx
#
#
use warnings;
use strict;
use POSIX;
use Exporter;
our @ISA = qw (Exporter);
use CGI::Cookie ();
use CGI ':standard';
use Apache2::Const -compile => qw(OK );
use Scalar::Util qw(looks_like_number);
use JSON;
use LWP::UserAgent;
use Time::Piece;
use Lib::Config;
use Mod::DBtank;
use Mod::APIfunc;
use Mod::Basework;
use Data::Dumper;
my $bw = new Basework;

sub handler {
 my $r = shift;
 my $q = new CGI;
 $q->import_names('R');
 my $dbt = new DBtank;
 my $apif = new APIfunc;
 my $cf = new Config;
 my %varenv = $cf->envonline();

 my $coo = $q->cookie('domcookie') || $R::sessionid || "";
 my $users_sharee = { c_id => 0 };
 my $api_return = { authcookie => '' };

 ($api_return,$users_sharee) = $apif->auth_verify($q,$coo,"");

  if($dbt->{website}->{$varenv{syshost}}->{merchant_id}){
   $api_return->{authcookie} = $dbt->{website}->{$varenv{syshost}}->{merchant_id} if(!$api_return->{authcookie});
  }elsif($dbt->{operator}->{$varenv{dbname}}->{merchant_id}){
   $api_return->{authcookie} = $dbt->{operator}->{$varenv{dbname}}->{merchant_id} if(!$api_return->{authcookie});
  }elsif($dbt->{primary}->{$varenv{dbname}}->{merchant_id}){
   $api_return->{authcookie} = $dbt->{primary}->{$varenv{dbname}}->{merchant_id} if(!$api_return->{authcookie});
  }
  $users_sharee->{c_id} = "0" if(!$users_sharee->{c_id});

 $bw->log("GBFSout handler with api_return: ",$api_return,"");

 print $q->header(-type => "application/json", -charset => "utf-8", -'Access-Control-Allow-Origin' => "*");
 #main
 my $project = "all";
 $project = $dbt->{website}->{$varenv{syshost}}->{project} if($dbt->{website}->{$varenv{syshost}}->{project});
 $project = $dbt->{operator}->{$varenv{dbname}}->{project} if($dbt->{operator}->{$varenv{dbname}}->{project});

 #request primary will jsonclient loop_sharees
 my $uri_request = $dbt->{primary}->{sharee_primary}->{primaryApp};
 #detect DMS, because  this will do it directly without loop_sharees
 $uri_request = $dbt->{operator}->{$varenv{dbname}}->{operatorApp} if($varenv{dbname} ne $dbt->{primary}->{sharee_primary}->{database}->{dbname} && $varenv{syshost} =~ /shareedms-/);

 if($R::request eq "stations_available"){
  station_information($api_return,\%varenv,$users_sharee,$uri_request,$project);
 }
 if($R::request eq "bikes_available"){
  vehicle_status($api_return,\%varenv,$users_sharee,$uri_request,$project);
 }

 return Apache2::Const::OK;
}


sub station_information {
 my $authcookie = shift || { authcookie => '' };
 my $varenv = shift;
 my $users_sharee = shift || { c_id => 0 };
 my $uri_request = shift || "";
 my $project = shift || "all";
 my $json = JSON->new->allow_nonref;

 my $rest_stations = "request=stations_available&project=$project&authcookie=$authcookie->{authcookie}";
   my $gbfs_resp = {};
   my @gbfs_stations = ();
   my $stations_json = fetch_primary_json("",$uri_request,$rest_stations);
   #decode json to hash
   eval {
     my $response_stations = {};
     $response_stations = decode_json($stations_json);

     foreach my $station (keys (%{ $response_stations->{shareejson}->{stations} })) {
	#print Dumper($response_stations->{shareejson}->{stations}->{$station});
   	my %gbfs_station = ();
	$gbfs_station{$station}{station_id} = $response_stations->{shareejson}->{stations}->{$station}->{station};
	$gbfs_station{$station}{name} = Encode::encode('utf-8', Encode::decode('iso-8859-1',$response_stations->{shareejson}->{stations}->{$station}->{description}));
	$gbfs_station{$station}{capacity} = $response_stations->{shareejson}->{stations}->{$station}->{capacity};
	$gbfs_station{$station}{bike_count} = $response_stations->{shareejson}->{stations}->{$station}->{bike_count};
	$gbfs_station{$station}{lat} = $response_stations->{shareejson}->{stations}->{$station}->{gps}->{latitude};
	$gbfs_station{$station}{lon} = $response_stations->{shareejson}->{stations}->{$station}->{gps}->{longitude};
	#$gbfs_station{$station}{is_charging_station} = 1 if(grep(/300102/, @{$response_stations->{shareejson}->{stations}->{$station}->{station_group}}));#E-L
	push (@gbfs_stations, $gbfs_station{$station});
     }
   };
   my $last_updated = time();
     $gbfs_resp = {
	 "last_updated" => $last_updated,
	 "ttl" =>  10,
	 "version" => "2.2", 
	 "data" => {
		 "stations" => [ @gbfs_stations ] 
	 }
   };
   if ($@){
     $bw->log("Failure, GBFSout station_information not valid","","");
     warn $@;
   }
 my $jrout = $json->pretty->encode($gbfs_resp);
 print $jrout;

 return;
}#end station_information


sub vehicle_status {
 my $authcookie = shift || { authcookie => '' };
 my $varenv = shift;
 my $users_sharee = shift || { c_id => 0 };
 my $uri_request = shift || "";
 my $project = shift || "all";
 my $json = JSON->new->allow_nonref;

 my $rest_bikes = "request=bikes_available&project=$project&authcookie=$authcookie->{authcookie}";

   my $gbfs_resp = {};
   my @gbfs_bikes = ();
   my $bikes_json = fetch_primary_json("",$uri_request,$rest_bikes);
   #decode json to hash
   eval {
     my $response_bikes = {};
     $response_bikes = decode_json($bikes_json);

     foreach my $bike (keys (%{ $response_bikes->{shareejson}->{bikes} })) {
      #if($response_bikes->{shareejson}->{bikes}->{$bike}->{station} eq "FR105"){
   	my %gbfs_bike = ();
	$gbfs_bike{$bike}{station_id} = $response_bikes->{shareejson}->{bikes}->{$bike}->{station};
	$gbfs_bike{$bike}{vehicle_id} = $response_bikes->{shareejson}->{bikes}->{$bike}->{bike};
	$gbfs_bike{$bike}{vehicle_name} = Encode::encode('utf-8', Encode::decode('iso-8859-1',$response_bikes->{shareejson}->{bikes}->{$bike}->{description}));#not part of gbfs
	$gbfs_bike{$bike}{vehicle_type_id} = $response_bikes->{shareejson}->{bikes}->{$bike}->{bike_group}[0];
	#$gbfs_bike{$bike}{is_reserved} = 0;
	#$gbfs_bike{$bike}{is_disabled} = 0;
	push (@gbfs_bikes, $gbfs_bike{$bike});
      #}
     }

	#{
	#"vehicle_id":"987fd100-b822-4347-86a4-b3eef8ca8b53",
	#"last_reported":1609866204,
	#"is_reserved":false,
	#"is_disabled":false,
	#"vehicle_type_id":"def456",
	#"current_range_meters":6543.0,
	#"station_id":"86",
	#"pricing_plan_id":"plan3"
	#}
   };
   my $last_updated = time();
   $gbfs_resp = {
	 "last_updated" => $last_updated,
	 "ttl" =>  0,
	 "version" => "3.0", 
	 "data" => {
		 "vehicles" => [ @gbfs_bikes ] 
	 }
   };
   if ($@){
     $bw->log("Failure, GBFSout vehicle_status not valid","","");
     warn $@;
   }

 my $jrout = $json->pretty->encode($gbfs_resp);
 print $jrout;

 return;
}#end vehicle_status


#requestor
sub fetch_primary_json {
 my $self = shift;
 my $primary_server = shift || "";
 my $rest = shift || "";
 my $primary_request = "$primary_server/APIjsonserver?$rest";
 $bw->log("GBFS primary_request: ",$primary_request,"");

 my $ua = LWP::UserAgent->new;
 $ua->agent("sharee GBFSout");

 my $req = HTTP::Request->new(GET => "$primary_request");
 $req->content_type('application/x-www-form-urlencoded');
 $req->content($rest);

 #Pass request to the user agent and get a response back
 my $res = $ua->request($req);
 #SSL certificate must be valid
 #print Dumper($res);
 # Check the outcome of the response
 if ($res->is_success) {
  #print $res->content;
  return $res->content;
  #print $res->status_line, "\n";
 }else {
  return "";
  #print $res->status_line, "\n";
 }
}


1;