<?
  use \Firebase\JWT\JWT;
  class zoomMtg
  {
    private $token;
    private $hosts;
    private $ente;
    public function __construct()
    {
      if (isset($_SESSION["ente"])) {
        global $config;
        $curl = curl_init(); 
        curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/oauth/token");
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 0);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
        $auth = base64_encode($config["zoom-OAuth-CLIENTID"].":".$config["zoom-OAuth-CLIENTSECRET"]);
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded","Authorization: Basic {$auth}"));
        curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query([
          "grant_type" => "account_credentials",
          "account_id" => $config["zoom-OAuth-ACCOUNTID"]
        ]));
        $risposta = curl_exec($curl);
        curl_close($curl);
        if (!empty($risposta)) {
          $risposta = json_decode($risposta,true);
          if (!empty($risposta["access_token"])) {
            $success = true;
            $this->token = $risposta["access_token"];
            $this->hosts = self::getHosts();
            $this->ente = $_SESSION["ente"]->getInfo();
          }
        } 
      } 
      if (empty($success)) {
        return false;
      }
    }

    public static function getHosts($onlyID= true) {
      if (isset($_SESSION["ente"])) {
        global $pdo;
        $hosts = $pdo->go("SELECT * FROM b_hosts WHERE provider = 'zoom' AND codice_ente = :ente",[":ente"=>$_SESSION["ente"]->codice]);
        if ($hosts->rowCount() > 0) {
          $hosts = $hosts->fetchAll(PDO::FETCH_ASSOC);
          if ($onlyID) {
            $tmp = [];
            foreach($hosts AS $host) {
              $tmp[] = $host["id"];
            }
            $hosts = $tmp;
          }
          return $hosts;
        }
      }
      return false;
    }

    public function getMeetingDetails($id) {
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/meetings/{$id}");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      $risposta = curl_exec($curl);
      curl_close($curl);
      if (!empty($risposta)) {
        $risposta = json_decode($risposta,true);
        if (!empty($risposta["id"])) {
          return $risposta;
        }
      }
      return false;
    }
    
    public function getPastMeeting($id) {
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/past_meetings/{$id}");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      $risposta = curl_exec($curl);
      curl_close($curl);
      if (!empty($risposta)) {
        $risposta = json_decode($risposta,true);
        if (!empty($risposta["id"])) {
          if ($risposta["participants_count"] > 0) {
            $curl = curl_init(); 
            curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/past_meetings/{$id}/participants");
            curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
            curl_setopt($curl, CURLOPT_TIMEOUT, 0);
            curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
            curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
            curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
            curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
            $participants = curl_exec($curl);
            curl_close($curl);
            if (!empty($participants)) {
              $participants = json_decode($participants,true);
              if (!empty($participants["participants"])) {
                $risposta["participants"] = $participants["participants"];
              }
            }
          }
          return $risposta;
        }
      }
      return false;
    }

    public function getMeetingFromDB($sezione,$codice_elemento,$sub_elemento,$contesto,$codice_meeting=false) {
      global $pdo;
      $bind = [":sezione"=>$sezione,":codice_elemento"=>$codice_elemento,":sub_elemento"=>$sub_elemento,":contesto"=>$contesto,"ente"=>$this->ente["codice"]];
      $sql = "SELECT * FROM b_conference WHERE provider = 'zoom' AND codice_ente = :ente AND sezione = :sezione AND codice_elemento = :codice_elemento AND sub_elemento = :sub_elemento AND contesto = :contesto ";
      if (!empty($codice_meeting)) { 
        $bind[":codice"] = $codice_meeting;
        $sql .= " AND codice = :codice";
      }
      $sql .= " ORDER BY codice DESC LIMIT 0,1";
      $meetings = $pdo->go($sql,$bind);
      if ($meetings->rowCount() > 0) { return $meetings->fetch(PDO::FETCH_ASSOC); }
      return false;
    }


    public function createUser() {
      global $config;
      $body = [];
      $body["action"] ="custCreate";
      $body["user_info"] = [
        "first_name" => "Host",
        "last_name" => substr($this->ente["denominazione"], 0, 20),
        "email" => time()."-".$this->ente["codice"]."@studioamica.it",
        "password" => $config["zoom-JWT-APIKEY"],
        "type" => (($_SESSION["demoEnv"]) ? 1 : 2)
      ];
      $body = json_encode($body);
      $curl = curl_init(); 
      global $pdo;
      curl_setopt_array($curl, array(
        CURLOPT_URL => 'https://api.zoom.us/v2/users',
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_ENCODING => '',
        CURLOPT_MAXREDIRS => 10,
        CURLOPT_TIMEOUT => 0,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
        CURLOPT_CUSTOMREQUEST => 'POST',
        CURLOPT_POSTFIELDS => $body,
        CURLOPT_HTTPHEADER => array(
          'Content-Type: application/json',
          'Accept: application/json',
          "Authorization: Bearer {$this->token}"
        ),
      ));
      $risposta = $response = curl_exec($curl);
      curl_close($curl);
      if (!empty($risposta)) {
        $risposta = json_decode($risposta,TRUE);
        if (!empty($risposta["id"])) {  
          $salva = new salva($pdo);
          $salva->debug = false;
          
          $salva->nome_tabella = "b_hosts";
          $salva->operazione = "INSERT";
          $salva->oggetto = ["id"=>$risposta["email"],"codice_ente"=>$this->ente["codice"],"other"=>$response];
          $salva->save();
          if (!$_SESSION["demoEnv"]) {
            $this->allowLiveStreaming($risposta["email"]);
          }
          return true;
        }
      }
      return false;
    }

    public function getInfoLicenze() {
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/accounts/me/plans/usage");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      $risposta = curl_exec($curl);
      curl_close($curl);
      if (!empty($risposta)) {
        $risposta = json_decode($risposta,true);
        return $risposta;
      }
      return false;
    }

    public function allowLiveStreaming($id) {
      $body = [];
      $body["members"] = [["email"=>$id]];
      $body = json_encode($body);
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/groups/n7MPX8PZQzaKFY9YPekQ0w/members");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
      curl_setopt($curl, CURLOPT_POSTFIELDS, $body); 
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      curl_exec($curl);
      curl_close($curl);
    }

    public function getSettings($id) {
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/users/{$id}/settings");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      curl_exec($curl);
      curl_close($curl);
    }

    public function deleteUser($codice) {
      $hosts = self::getHosts(false);
      foreach($hosts AS $tmp) {
        if ($tmp["codice"] == $codice) {
          $host = json_decode($tmp["other"],true);
          break;
        }
      }
      if (!empty($host)) {
        $curl = curl_init(); 
        global $pdo;
        curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/users/{$host["id"]}?action=delete");
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 0);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
        $risposta = curl_exec($curl);
        curl_close($curl);
        if (empty($risposta)) {
          $pdo->go("DELETE FROM b_hosts WHERE codice = :codice",[":codice"=>$codice]);
          return true;
        }
      }
      return false;
    }

    public function createMeeting($sezione,$codice_elemento,$sub_elemento,$contesto) {
      $body = [];
      $body["type"] = 1;
      $body["topic"] = "{$sezione} - #{$codice_elemento} - {$contesto}";
      $body["password"] = ""; // randomPassword(10); TODO: IMPLEMENTARE PASSWORD
      $body["timezone"] = "Europe/Rome";
      $body["settings"] = [
        "audio" => "voip",
        "auto_recording" => "local",
        "waiting_room" => true,
        "contact_name" => $this->ente["denominazione"],
        "contact_email" => $this->ente["pec"],
        "approval_type" => 1
      ];
      $body = json_encode($body);
      $curl = curl_init(); 
      global $pdo;
      $check = $pdo->prepare("SELECT response FROM b_conference WHERE provider = 'zoom' AND codice_ente = :ente AND host = :host AND DATE(timestamp) = curdate() ORDER BY codice DESC LIMIT 0,1");
      $check->bindValue(":ente",$this->ente["codice"]);
      foreach($this->hosts AS $tmpHost) {
        $check->bindValue(":host",$tmpHost);
        $check->execute();
        if ($check->rowCount() > 0) {
          $tmpResponse = $check->fetch(PDO::FETCH_ASSOC);
          $meeting = json_decode($tmpResponse["response"],true);
          $status = $this->getMeetingDetails($meeting["id"]);
          if (empty($status["status"]) || $status["status"] == "finished") {
            $host = $tmpHost;
          }
        } else {
          $host = $tmpHost;
        }
        if (!empty($host)) { break; }
      }
      if (!empty($host)) {
        curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/users/{$host}/meetings");
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($curl, CURLOPT_TIMEOUT, 0);
        curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
        curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($curl, CURLOPT_POSTFIELDS, $body); 
        curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));

        $risposta = $response = curl_exec($curl);
        curl_close($curl);
        if (!empty($risposta)) {
          $risposta = json_decode($risposta,TRUE);
          if (!empty($risposta["uuid"])) {  
            $salva = new salva($pdo);
            $salva->debug = false;
            
            $salva->nome_tabella = "b_conference";
            $salva->operazione = "INSERT";
            $salva->oggetto = ["sezione"=>$sezione,"codice_ente"=>$this->ente["codice"],"provider"=>"zoom","codice_elemento"=>$codice_elemento,"sub_elemento"=>$sub_elemento,"contesto"=>$contesto,"response"=>$response,"host"=>$host];
            $salva->save();
            return $risposta;
          }
        }
      }
      return false;
    }

    public function deleteMeeting($id) {
      $curl = curl_init(); 
      curl_setopt($curl, CURLOPT_URL, "https://api.zoom.us/v2/meetings/{$id}");
      curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($curl, CURLOPT_TIMEOUT, 0);
      curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
      curl_setopt($curl, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
      curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE");
      curl_setopt($curl, CURLOPT_HTTPHEADER, array("Content-Type: application/json","Authorization: Bearer {$this->token}"));
      $risposta = curl_exec($curl);
      curl_close($curl);
      if (curl_getinfo($curl, CURLINFO_HTTP_CODE) == 204) { return true; }
      return false;
    }
    
    public function printLog($id) {
      $bind = [];
      $bind[":codice"] = $id;
      global $pdo;
      $risultato_conference = $pdo->go("SELECT * FROM b_conference WHERE provider = 'zoom' AND codice = :codice ",$bind);
      if ($risultato_conference->rowCount() > 0) {
        $zoomMeeting = $risultato_conference->fetch(PDO::FETCH_ASSOC);
        $response = json_decode($zoomMeeting["response"],true);
        $info = $this->getPastMeeting($response["uuid"]);
        if (!empty($info)) {
          include(__DIR__."/log.php");
        }
      }
    }
  }
  
?>