<?php

namespace App\Forms;

use Nette,
    Nette\Application\UI\Form,
    App\Model\Utils\StringUtils,
    App\Model\UserManager,
    Nette\Security\User;

/**
 * Factory for sign-in form
 * @author Michal Rost
 * @since 6.4.2015
 */
class SignFormFactory extends AbstractFormFactory {

  private $userManager;
  private $userObject;
  private $user;
  private $db;

  /**
   * Creates form factory
   * @param UserManager $um
   * @param DibiConnection $db
   * @param User $user
   */
  public function __construct(UserManager $um, \DibiConnection $db, User $user) {
    $this->userObject = (new \App\Model\Dao\AppUser())->setDb($db);
    $this->userManager = $um;
    $this->user = $user;
    $this->db = $db;
  }

  /**
   * Creates form
   * @return Form
   */
  public function create() {

    // Messages
    $msgUsr = 'Please enter your username.';
    $msgPas = 'Please enter your password.';

    // Form
    $form = new Form;
    $form->addText('email', 'E-mail:')->setRequired($msgUsr);
    $form->addPassword('passwd', 'Password:')->setRequired($msgPas);
    $form->addCheckbox('remember', 'Keep me signed in');
    $form->addSubmit('send', 'Sign in');
    $form->onSuccess[] = array($this, 'formSucceeded');
    $form->onValidate[] = array($this, 'formValidation');
    return $this->updateRenderer($form);
  }

  /**
   * Handles form suceed
   * @param Form $form
   * @param array $values
   */
  public function formSucceeded($form, $values) {
    if ($values->remember) {
      $this->user->setExpiration('14 days', FALSE);
    } else {
      $this->user->setExpiration('20 minutes', TRUE);
    }
    try {
      $this->user->login($values->email, $values->passwd, null, null);
    } catch (Nette\Security\AuthenticationException $e) {
      if ($e->getCode() == UserManager::NOT_VERIFIED) {
        $args = array('email' => $values->email);
        $form->getPresenter()->redirect("Sign:verify", $args);
      } else {
        $form->addError($e->getMessage());
      }
    }
  }

  /**
   * Checks sign in form validity
   * @param Form $form
   */
  public function formValidation(Form $form) {

    // Helper variables
    $values = $form->getValues();
    $email = $values['email'];
    $passwd = $values['passwd'];

    // Check email is set
    if (strlen(StringUtils::simplify($email)) == 0) {
      $form['email']->addError('Fill e-mail');
    }

    // Check if email has valid format
    if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
      $form['email']->addError('Invalid e-mail format.');
    }

    // Check password is set
    if (strlen(StringUtils::simplify($passwd)) == 0) {
      $form['passwd']->addError('Fill password');
    }

    // Check password
    $ac = $this->userObject->loadByEmail($email);
    if (!$ac->isPopulated() || !$this->userManager->checkPasswd($ac, $passwd)) {
      $form['passwd']->addError('Invalid password');
    }
  }

}