package APIjsonclient;
# 
# SPDX-License-Identifier: AGPL-3.0-or-later
# Copyright (c) Rainer Gümpelein, TeilRad GmbH
#
#Client for shareejson api
#
use strict;
use warnings;
use POSIX;
use CGI; # only for debugging
use JSON;
use LWP::UserAgent;
use URI::Encode;
use Config::General;
use Mod::Basework;
use Mod::DBtank;
use Data::Dumper;


sub new {
 my $class = shift;
 my $self = {};
 bless($self,$class);
 return $self;
}


my $q = new CGI;
my $netloc = $q->url(-base=>1);
my $ua = LWP::UserAgent->new;
my $uri_encode = URI::Encode->new( { encode_reserved => 1 } );
$ua->agent("APIclient $netloc");
my $bw = new Basework;
my $dbt = new DBtank;

my $json = JSON->new->allow_nonref;

sub loop_sharees {
 my $self = shift;
 my $q = shift || "";
 my $auth = shift;
 my $authraw = shift;
 my $return_merchant = shift || "";
 my $last_used_operator = shift || "";
 my @keywords = $q->param;

 #only request keys which initated by sharee primary requests to operator 
 my $rest_hash = {};
 my $rest = "";
 foreach (@keywords){
  if($_ =~ /request|authcookie|system|bike|station/g){
   my $val = $q->param($_);
   my $encoded_val = $uri_encode->encode($val);
   $rest .= "$_=$encoded_val&";
   $rest_hash->{$_} = "$encoded_val";
  }
 }
 $rest =~ s/\&$//;
 
 my $response_in = {};

 my $globalconf_file = "/var/www/copri4/shareeconf/global.cfg";
 my $conf = Config::General->new($globalconf_file);
 my %globalconf = $conf->getall;

 my @uri_operator_array = ();
 my @user_group = ();
 my @user_tour = ();
 my $fetch_hash = {};
 my $o=0;
 while (my ($key, $op_name) = each %{ $globalconf{operator} }) {
   my $ret_json = "";
   my %ret_json_all = ();
   my %ret_json_private = ();
   my %ret_json_public = ();
   my %withpub = ();

   #shareetool, to loop only operators who is the shareetool by usersconf enabled 
   my $users_serviceapp = { u_id => 0 };
   if($return_merchant->{aowner} && $return_merchant->{aowner} == 187 && $op_name->{database}->{dbname} && $authraw->{txt17} =~ /$op_name->{database}->{dbname}/){
     my $dbh_operator = $dbt->dbconnect_extern($op_name->{database}->{dbname});
     $users_serviceapp = $dbt->select_users($dbh_operator,$authraw->{c_id},"and int09=1");
     $bw->log("shareetool select_users $return_merchant->{aowner} on $op_name->{database}->{dbname} $authraw->{c_id} $authraw->{txt17}",$users_serviceapp->{u_id},"");
   }
   #every sharee client must have a merchant_id which associate a project
   if($op_name->{operatorApp} && ($users_serviceapp->{u_id} || $return_merchant->{merchant_id} eq $globalconf{website}->{'shareeweb-sharee'}->{merchant_id} || ($return_merchant->{project_id} eq $op_name->{project}))){
    $o++;
    #stations_available with optional caching
    if($rest_hash->{request} eq "stations_available"){
     push(@uri_operator_array, $op_name->{operatorApp});
     #if disabled, reads DB
     if($op_name->{cache_station} == 1){
	#primary authraw
   	if($authraw->{txt30}){
    	 my %prim_tarif_hash = ();
    	 if($authraw->{txt30} =~ /\w\s\w/){
     	  %prim_tarif_hash = map { $_ => 1 } split(/\s+/,$authraw->{txt30});
    	 }elsif($authraw->{txt30} && $authraw->{txt30} =~ /(\w+)/){
     	  $prim_tarif_hash{$1} = 1;
    	 }
	 foreach my $optarif (keys(%prim_tarif_hash)){
	  my $op_key = "";
	  my $tarif_key = "";
	  if($optarif =~ /([A-Z]+)(\d+)/){
	    $op_key = $1;
	    $tarif_key = $2;
  	  }
	  if($op_key && $op_key eq $op_name->{oprefix}){
	   #print $optarif . "---" . $op_name->{oprefix} . "\n";
	   $ret_json_private{$optarif} = $self->fetch_operator_json("$op_name->{operatorApp}/json/stations-$optarif.json","");
      	   eval {
	    $bw->log("$o $key) Test Decode json-caching, using 1: $op_name->{operatorApp}/json/stations-$optarif.json","","");
       	    my $response_in = "";
            $response_in = decode_json($ret_json_private{$optarif});
      	   };
      	   if ($@){
	    $bw->log("$o $key) Failure Test reading json-caching, using fallback 1 and generate cache just-in-time: $op_name->{operatorApp}/APIjsonserver?$rest&cachme=$tarif_key",$ret_json,"");
	    #$ret_json_private{$optarif} = $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver",$rest);
	    $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver","$rest&cachme=$tarif_key");
	    $ret_json_private{$optarif} = $self->fetch_operator_json("$op_name->{operatorApp}/json/stations-$optarif.json","");
      	   }
  	  }
	  %ret_json_all = %ret_json_private;
 	 }
	}#primary private Tarifs

	$withpub{$op_name->{oprefix}} = 0;
	foreach my $optarif (keys(%ret_json_all)){
	  my $opx = $1 if($optarif =~ /([A-Z]+)(\d+)/);
	  if($op_name->{oprefix} eq $opx){
	   eval {
	    $bw->log("$o $key) Test Decode json-caching, using 2: ret_json_private hash","","");
	    my $response_in = "";
	    $response_in = decode_json($ret_json_all{$optarif});
	    foreach my $station (keys (%{ $response_in })) {
	     $withpub{$op_name->{oprefix}} = $response_in->{$station}->{withpub};
	    }
	   };
	   if ($@){
	    $bw->log("$o $key) Failure Test reading json-caching, No fallback for ret_json_private hash","","");
	   }
	  }
	}

	#print "$op_name->{oprefix}: $withpub{$op_name->{oprefix}}\n";
	if($withpub{$op_name->{oprefix}} || $op_name->{withpub}){
	  $ret_json_public{$op_name->{oprefix}} = $self->fetch_operator_json("$op_name->{operatorApp}/json/stations-$op_name->{oprefix}.json","");
      	   eval {
	    $bw->log("$o $key) Test Decode json-caching, using 3: $op_name->{operatorApp}/json/stations-$op_name->{oprefix}.json","","");
       	    my $response_in = "";
            $response_in = decode_json($ret_json_public{$op_name->{oprefix}});
      	   };
      	   if ($@){
	    $bw->log("$o $key) Failure Test reading json-caching, using fallback 3 and generate cache just-in-time: $op_name->{operatorApp}/APIjsonserver?$rest&cachme=public",$ret_json,"");
	    #$ret_json_public{$op_name->{oprefix}} = $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver",$rest);
	    $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver","$rest&cachme=public");
	    $ret_json_public{$op_name->{oprefix}} = $self->fetch_operator_json("$op_name->{operatorApp}/json/stations-$op_name->{oprefix}.json","");
      	   }
	   %ret_json_all = ( %ret_json_all, %ret_json_public );
        }

    	foreach my $optarif (keys(%ret_json_all)){
     	 if($ret_json_all{$optarif}){
	  eval {
	   $bw->log("$o $key) Test Decode json-caching, using 3: ret_json_all hash","","");
      	   my $response_in = "";
      	   $response_in = decode_json($ret_json_all{$optarif});
      	   foreach my $result (keys (%{ $response_in })) {
       	     $fetch_hash->{$result} = $response_in->{$result};
      	   }
	  };
	  if ($@){
            $bw->log("$o $key) Failure Test reading json-caching, No fallback for ret_json_all hash","","");
          }
     	 }
    	}

     }#end cache_station
     else{	  
       	$ret_json = $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver",$rest);
	$bw->log("$o $key) Caching disabled, No reading json-caching, taking: $op_name->{operatorApp}/APIjsonserver?$rest",$ret_json,"");
     }

    }#end stations_available
    #user_bike_occupied by $last_used_operator
    elsif($last_used_operator && $rest_hash->{request} eq "user_bikes_occupied"){
      if($last_used_operator eq $op_name->{database}->{dbname}){
	#$bw->log("fetch_operator_json >> user_bikes_occupied by last_used_operator:$last_used_operator ","","");
      	$ret_json = $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver","$rest&withoutkey=1");
      }
    }
    #all other operator requests
    else{
      $ret_json = $self->fetch_operator_json("$op_name->{operatorApp}/APIjsonserver",$rest);
    }

     if($ret_json){
      push(@uri_operator_array, $op_name->{operatorApp});
      eval {
       my $response_in = "";
       $response_in = decode_json($ret_json);
       #print Dumper($response_in);
   
       #collect OP user_group
       if($response_in->{shareejson}->{user_group}){
	 push (@user_group, @{$response_in->{shareejson}->{user_group}});
       }
       #collect OP user_tour
       if($response_in->{shareejson}->{user_tour}){
	 push (@user_tour, @{$response_in->{shareejson}->{user_tour}});
       }

       if($q->param('request') && $q->param('request') =~ /stations_all|stations_available/){
       	foreach my $result (keys (%{ $response_in->{shareejson}->{stations} })) {
	 $fetch_hash->{$result} = $response_in->{shareejson}->{stations}->{$result};
	 #workaround, delete contributor test stations on global sharee project Freiburg
	 if($return_merchant->{project_id} eq "Freiburg" && $return_merchant->{project_id} ne $op_name->{project} && $fetch_hash->{$result}->{description} =~ /Contributor/i){
	  #$bw->log("delete contributor-station $result: $fetch_hash->{$result}->{description}","","");
	  delete $fetch_hash->{$result};
	 }
       	}
       }
       if($q->param('request') && $q->param('request') =~ /bikes_all|bikes_available/){
       	foreach my $result (keys (%{ $response_in->{shareejson}->{bikes} })) {
	 $fetch_hash->{$result} = $response_in->{shareejson}->{bikes}->{$result};
       	}
       }
       if($q->param('request') && $q->param('request') =~ /user_bikes_occupied/){
       	foreach my $result (keys (%{ $response_in->{shareejson}->{bikes_occupied} })) {
	 $fetch_hash->{$result} = $response_in->{shareejson}->{bikes_occupied}->{$result};
       	}
       }
      };
      if ($@){
	$bw->log("$o $key) Failure, eval json from jsonclient",$ret_json,"");
  	warn $@;
      }
     }else{
	$bw->log("$o $key) NO json from Operator:",$op_name->{operatorApp},"");
     }
     #$bw->log("--> LOOP-end jsonclient loop_sharees user_group:\n",\@user_group,"");
   }

 }
 #print "ALL:" . Dumper($fetch_hash);
 #
 return ($fetch_hash,\@uri_operator_array,\@user_group,\@user_tour);
}

sub fetch_operator_json {
 my $self = shift;
 my $operator_server = shift || "";
 my $rest = shift || "";
 my $operator_request = "$operator_server?$rest";

 #$bw->log("fetch_operator_json >> $operator_request","$operator_request","");
 my $req = HTTP::Request->new(GET => "$operator_request");
 $req->content_type('application/x-www-form-urlencoded');
 $req->content($rest);

 my $res = $ua->request($req);
 if ($res->is_success) {
  #print $res->content;
  #return $res->content;
  my $encoded = Encode::encode('utf-8', Encode::decode('iso-8859-1',$res->content));
  return $encoded;
 }else {
  return "";
 }
}

1;