<?php
require_once(__DIR__ . "/notification.php");

/**
 * Class for creating and rendering an incident
 */
class Incident implements JsonSerializable
{
  private $id;
  private $date;
  private $end_date;
  private $timestamp;
  private $end_timestamp;
  private $text;
  private $type;
  private $title;
  private $username;
  private $service_id;
  private $service_name;

  /**
   * Constructs service from its data.
   * @param array $data incident data
   */
  function __construct($data)
  {
    //TODO: Maybe get data from id?
    $this->id = $data['status_id'];
    $this->timestamp = $data['time'];
    $this->end_timestamp = $data['end_time'];
    $this->date = new DateTime("@" . $data['time']);
    $this->date = $this->date->format('Y-m-d H:i:sP');
    if ($data['end_time'] > 0) {
      $this->end_date = new DateTime("@" . $data['end_time']);
      $this->end_date = $this->end_date->format('Y-m-d H:i:sP');
    }
    $this->type = $data['type'];
    $this->title = $data['title'];
    $this->text = $data['text'];
    $this->username = $data['username'];
    $this->service_id = $data['service_id'];
    $this->service_name = $data['service_name'];
  }

  /**
   * Deletes incident by ID.
   * @param int ID
   */
  public static function delete($id)
  {
    global $mysqli, $message, $user;

    if ($user->get_rank() > 1) {
      $stmt = $mysqli->prepare("SELECT count(*) as count FROM status WHERE id= ? AND user_id = ?");
      $stmt->bind_param("ii", $id, $_SESSION['user']);
      $stmt->execute();
      $query = $stmt->get_result();
      if (!$query->fetch_assoc()['count']) {
        $message = _("You don't have permission to do that!");
        return;
      }
    }

    $stmt = $mysqli->prepare("DELETE FROM services_status WHERE status_id = ?");
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $query = $stmt->get_result();

    $stmt = $mysqli->prepare("DELETE FROM status WHERE id= ?");
    $stmt->bind_param("i", $id);
    $stmt->execute();
    $query = $stmt->get_result();
    header("Location: " . WEB_URL . "/admin");
  }

  /**
   * Processes submitted form and adds incident unless problem is encountered,
   * calling this is possible only for admin or higher rank. Also checks requirements
   * for char limits.
   * @return void
   */
  public static function add()
  {
    global $mysqli, $message;
    //Sould be a better way to get this array...
    $statuses = array(_("Major outage"), _("Minor outage"), _("Planned maintenance"), _("Operational"));

    $user_id = $_SESSION['user'];
    $type = $_POST['type'];
    $title = strip_tags($_POST['title']);
    $text = strip_tags($_POST['text'], '<br>');

    if (strlen($title) == 0) {
      $message = _("Please enter title");
      return;
    } else if (strlen($title) > 50) {
      $message = _("Title too long! Character limit is 50");
      return;
    }

    if (strlen($title) == 0) {
      $message = _("Please enter text");
      return;
    }

    if ($type == 2 && (!strlen(trim($_POST['time'])) || !strlen(trim($_POST['end_time'])))) {
      $message = _("Please set start and end time! Use ISO 8601 format.");
      return;
    }

    if (empty($_POST['services'])) {
      $message = _("Please select at least one service");
    } else {
      if (!is_array($_POST['services'])) {
        $services = array($_POST['services']);
      } else {
        $services = $_POST['services'];
      }

      if (!empty($_POST['time']) && $type == 2) {
        $input_time = (!empty($_POST['time_js']) ? $_POST['time_js'] : $_POST['time']);
        $input_end_time = (!empty($_POST['end_time_js']) ? $_POST['end_time_js'] : $_POST['end_time']);
        $time = strtotime($input_time);
        $end_time = strtotime($input_end_time);
        if (!$time) {
          $message = _("Start date format is not recognized. Please use ISO 8601 format.");
          return;
        }

        if (!$end_time) {
          $message = _("End date format is not recognized. Please use ISO 8601 format.");
          return;
        }

        if ($time >= $end_time) {
          $message = _("End time is either the same or earlier than start time!");
          return;
        }
      } else {
        $time = time();
        $end_time = '';
      }

      $stmt = $mysqli->prepare("INSERT INTO status VALUES (NULL,?, ?, ?, ?, ?, ?)");
      $stmt->bind_param("issiii", $type, $title, $text, $time, $end_time, $user_id);
      $stmt->execute();
      $query = $stmt->get_result();
      $status_id = $mysqli->insert_id;

      foreach ($services as $service) {
        $stmt = $mysqli->prepare("INSERT INTO services_status VALUES (NULL,?, ?)");
        $stmt->bind_param("ii", $service, $status_id);
        $stmt->execute();
        $query = $stmt->get_result();
      }

      // Perform notification to subscribers
      $notify = new Notification();
      $notify->populate_impacted_services($status_id);

      $notify->type = $type;
      $notify->time = $time;
      $notify->title = $title;
      $notify->text = $text;
      $notify->status = $statuses[$type];

      $notify->notify_subscribers();

      header("Location: " . WEB_URL . "/admin?sent=true");
    }
  }

  /**
   * Renders incident
   * @param Boolean $admin - decides whether admin controls should be rendered
   * @return void
   */
  public function render($admin = 0)
  {
    global $icons;
    global $classes, $user;
    $admin = $admin && (($user->get_rank() <= 1) || ($user->get_username() == $this->username));
    $Parsedown = new Parsedown();
?>
    <article class="card border-<?php echo $classes[$this->type]; ?> mb-3">
      <div class="card-colore icon bg-<?php echo $classes[$this->type]; ?>"><i class="<?php echo $icons[$this->type]; ?>"></i></div>
      <div class="card-header bg-<?php echo $classes[$this->type]; ?> border-<?php echo $classes[$this->type]; ?>">
        <?php echo $this->title; ?>
        <div class="float-end">
          <?php if ($admin) {
            echo '<a href="' . WEB_URL . '/admin/?delete=' . $this->id . '" class="delete"><i class="fa fa-trash"></i></a>';
          } ?>
        </div>
        <time class="float-end timeago" datetime="<?php echo $this->date; ?>"><?php echo $this->date; ?></time>
      </div>
      <div class="card-body">
        <?php echo $Parsedown->setBreaksEnabled(true)->text($this->text); ?>
      </div>
      <div class="card-footer bg-transparent border-<?php echo $classes[$this->type]; ?>">
        <p class="card-title">
          <?php echo _("Impacted service(s): "); ?>
          <?php if (isset($this->end_date)) { ?>
            <span class="float-end"><?php echo strtotime($this->end_date) > time() ? _("Ending") : _("Ended"); ?>:&nbsp;<time class="timeago" datetime="<?php echo $this->end_date; ?>"><?php echo $this->end_date; ?></time></span>
          <?php } ?>
        </p>
        <p class="card-badge">
          <?php foreach ($this->service_name as $value) {
            echo '<span class="badge bg-secondary">' . $value . '</span>&nbsp;';
          } ?>
        </p>
      </div>
    </article>
<?php
  }

  public function jsonSerialize()
  {
    return [
      "id" => $this->id,
      "date" => $this->timestamp,
      "end_date" => $this->end_timestamp,
      "text" => $this->text,
      "type" => $this->type,
      "title" => $this->title,
      "username" => $this->username
    ];
  }
}
