#pragma once

#include "lts_widgets_export.h"
#include "lts_frameless_dialog.h"

#include <QString>
#include <QHash>


class QWidget;
class QHBoxLayout;


namespace LtsWidgets
{

/**
 * @brief The Button enum describes one or more buttons, which should be shown on a Dialog which supports LtsWidgets::Button. Also this enum
 * is the return type of LtsMessageDialog and provides the button clicked to close the Popup-Dialog.
 */
enum class Button
{
  UNKNOWN = 0,
  Ok = 1,
  Yes = 2,
  No = 4,
  Cancel = 8,

  Apply = 16,
  Discard = 32,
};
Q_DECLARE_FLAGS(Buttons, Button)
inline uint qHash(LtsWidgets::Button b)
{
  return ::qHash(static_cast<int>(b));
}

/**
 * @brief [Please consider using LtsMessageDialogNew]  The LtsMessageDialog class provides a BLOCKING Popup-Dialog (based on LtsFramelessDialog) to show a message to the user with selectable buttons. This class is static and cannot be instantiated.
 * To show a message to the user class 'LtsMessageDialog::showMessage(..)'. And to get the button that was selected by the user to close the dialog, consider the return type 'LtsWidgets::Button'.
 * This Popup-Dialog closes automatically if any button on it is clicked.
 * The return type is an enum class instance which contains the information about the clicked button.
 * If no button was specified there is no chance to close the dialog if LtsWidgets::Behaviour::Modal was specified.
 */
namespace LtsMessageDialog // in reality this is the helper, but for "naming's sake", this is not called the helper
{
/**
   * @brief showMessage shows a Popup-Dialog to show a message to the user with selectable buttons - method is blocking (creates new EventLoop)!
   * @param parent The widget to be covered.
   * @param message The message to the user.
   * @param behaviour How the Popup-Dialog should behave (see LtsFramelessDialog).
   * @param buttons A list of Buttons to provide to the user.
   * @param buttonTexts If set, the button texts are used from there instead the default ones
   * @return The button that has been clicked by the user to close this Popup-Dialog.
   */
LTSWIDGETS_EXPORT Button showMessage(QWidget* parent,
                                     const QString &message,
                                     const QString &title = QString(),
                                     const Behaviour behaviour = Behaviour::Modal,
                                     const Buttons buttons = Button::Ok,
                                     const QHash<Button, QString> &buttonTexts = QHash<Button, QString>());
LTSWIDGETS_EXPORT Button askApplyDiscardCancel(QWidget *parent);
} // namespace LtsMessageDialog



/**
 * @brief The LtsMessageDialog class provides a NON-BLOCKING Popup-Dialog (based on LtsFramelessDialog) to show a message to the user with selectable buttons.
 * To show a message to the user use: connect(new LtsMessageDialogNew(this, title, message), &LtsMessageDialogNew::ok, this, &MyDialog::mySlot);
 * This Popup-Dialog closes automatically if any button on it is clicked.
 * Keep in mind that as this dialog does not block, following code gets executed right afetr creating this dialog.
 */
class LTSWIDGETS_EXPORT LtsMessageDialogNew : public QObject
{
  Q_OBJECT

public:
  explicit LtsMessageDialogNew(QWidget* parent,
                               const QString &message,
                               const QString &title = QString(),
                               const Behaviour behaviour = Behaviour::Modal,
                               const Buttons buttons = Button::Ok,
                               const QHash<Button, QString> &buttonTexts = QHash<Button, QString>(),
                               bool deleteOnClose = true /* retain c++ conformity by this convenience bool */);

private:
  LtsFramelessDialog *m_dialog;

  QPushButton *addButton(const QString &text, QHBoxLayout *thatLayout, LtsFramelessDialog *dialog, const Button &button, QWidget *parent);


signals:
  void ok();
  void yes();
  void no();
  void apply();
  void discard();
  void cancel();

};

} // namespace LtsWidgets

Q_DECLARE_OPERATORS_FOR_FLAGS(LtsWidgets::Buttons)