<?php
  
  require_once("../commun.php");
  
  verifierDroit(2);
  
  if (!(donne("idCarte"))) {
      retour("requete_malformee");
  }
  
  if (!clientExiste(donne("idCarte"))) {
      retour("client_inconnu");
  }
  
  $requete = $db->prepare("SELECT solde FROM Clients WHERE idCarte=?");

  if (!$requete) {
      retour("erreur_bdd_preparee", ["message" => $db->error]);
  }

  $requete->bind_param("s", $_POST["idCarte"]);
  $requete->bind_result($soldeAncien);
  if (!$requete->execute()) {
      retour("erreur_bdd", ["message" => $requete->error]);
  }
  $requete->fetch();
  $requete->close();
  
  if ($soldeAncien <= 0) {
      retour("solde_negatif");
  }
  
  $requete = $db->prepare("UPDATE Clients SET solde=0 WHERE idCarte=?");

  if (!$requete) {
      retour("erreur_bdd_preparee", ["message" => $db->error]);
  }

  $requete->bind_param("s", $_POST["idCarte"]);
  if (!$requete->execute()) {
      retour("erreur_bdd", ["message" => $requete->error]);
  }
  $requete->close();

  $idTransaction = transaction(TRANSACTION_VIDANGE, $_POST["idCarte"], $soldeAncien);

  retour("ok", ["idTransaction" => $idTransaction, "soldeAncien" => $soldeAncien]);

  
  ?>