/**
 * @RDE_HEADER@
 * Helper Class, which manages a progress Dialog with two states.
 * $Id$
 * $HeadURL$
 * $Author$
 *
 * Created by Mike Wille, SLSE, 2016-06-20
 */

#pragma once

#include "lts_widgets_export.h"

#include <QObject>
#include <QPointer>

class QLabel;
class QWidget;

namespace LtsWidgets
{
class LtsFramelessDialog;

/**
 * @brief The LtsProgressDialogHelper class is a helper class, which can be used to easily
 * show a Dialog with eather a wait state (indefinite progress bar), or a default message,
 * adjusted to the result type (see ReplyResult)
 */
class LTSWIDGETS_EXPORT LtsProgressDialogHelper : public QObject
{
  Q_OBJECT

public:
  /**
   * @brief The ReplyResult enum describes the behaviour of the slotSopWaitForReplyWindow method.
   */
  enum class ReplyResult
  {
    Close = 0, // say nothing, just close automatically
    Success, // dialog with success message, has to be receipted
    Failure, // dialog with failure message plus reply string, has to be receipted
    TimeOut, // dialog with timeout message, has to be receipted
  };

  explicit LtsProgressDialogHelper(QWidget *parent = nullptr);
  ~LtsProgressDialogHelper();
  bool isShown() const { return !!m_waitDlg; }
  void setCustomText(const QString &customText = QString());

  void setParentWidget(QWidget *newParent);

public slots:
  /**
   * @brief slotShowWaitForReplyWindow shows a centered wait dialog which does not allow the user to interact with the application and cannot be canceled.
   */
  void slotShowWaitForReplyWindow(/*const QString &textToShow*/);

  /**
   * @brief slotStopWaitForReplyWindow closes the wait dialog. Nothing happens when there was no show wait dialog called before.
   * @param replyResult The wait dialog is closed on ReplyResult::Close. A new centered, modal dialog is shown on ReplyResult::Failure/Success/Timeout with an error message in it.
   * @param replyString An explanatory string shown on ReplyResult::Failure to tell the user what went wrong on.
   */
  void slotStopWaitForReplyWindow(const LtsWidgets::LtsProgressDialogHelper::ReplyResult &replyResult = ReplyResult::Close /* say nothing, just close */,
                                  const QString &replyString = QString());

private:
  QPointer<LtsFramelessDialog> m_waitDlg;
  QWidget *m_parentWidget;
  QPointer<QLabel> m_textLabel;

signals:
  /**
   * @brief accepted is emitted when accept() was called (e.g. by clicking okay)
   */
  void accepted();

private slots:
  void accept();
};

}