//
// C++ Interface: ComboboxAdapter
//
// Description: 
//
// Author: Martin Preisler <preisler.m@gmail.com>, (C) 2011
// based on Atlas adapters by Erik Ogenvik <erik@ogenvik.org>, (C) 2007
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.//
//
#ifndef EMBEROGRE_GUI_ADAPTERS_COMBOBOXADAPTER_H
#define EMBEROGRE_GUI_ADAPTERS_COMBOBOXADAPTER_H

#include "GenericPropertyAdapter.h"
#include "../ColouredListItem.h"
#include <CEGUI/widgets/Combobox.h>
#include <CEGUI/widgets/Editbox.h>
#include <CEGUI/widgets/PushButton.h>
#include <wfmath/MersenneTwister.h>

namespace Ember::OgreView::Gui::Adapters {

/**
 * @brief bridges a string to a CEGUI combobox (and combobox only!)
 */
template<typename ValueType, typename PropertyNativeType>
class ComboboxAdapter : public GenericPropertyAdapter<ValueType, PropertyNativeType> {
public:
	/**
	 * @brief Ctor
	 */
	ComboboxAdapter(const ValueType& value, CEGUI::Window* widget);

	/**
	 * @brief Dtor
	 */
	virtual ~ComboboxAdapter();

	void addSuggestion(const std::string& suggestedValue);

	void randomize() override;

protected:
	CEGUI::Combobox* mCombobox;
};

template<typename ValueType, typename PropertyNativeType>
ComboboxAdapter<ValueType, PropertyNativeType>::ComboboxAdapter(const ValueType& value, CEGUI::Window* widget):
		GenericPropertyAdapter<ValueType, PropertyNativeType>(value, widget, "Text", CEGUI::Combobox::EventListSelectionAccepted),
		mCombobox(dynamic_cast<CEGUI::Combobox*>(widget)) {
	// TODO: Do we want to assert that given widget is a combobox or just silently not provide the
	//       functionality specific to the combobox?

	if (mCombobox) {
		this->addGuiEventConnection(mCombobox->getEditbox()->subscribeEvent(CEGUI::Window::EventDeactivated,
																			[this](const CEGUI::EventArgs& e) {
																				auto initialValue = this->mEditedValue;
																				if (initialValue != this->getValue()) {
																					this->widget_PropertyChanged(e);
																				}
																				return true;
																			}

									)
		);
		// at this point no suggestions were added, so hide the combobox dropdown button
		mCombobox->getPushButton()->setVisible(false);
	}
}

template<typename ValueType, typename PropertyNativeType>
ComboboxAdapter<ValueType, PropertyNativeType>::~ComboboxAdapter() = default;

template<typename ValueType, typename PropertyNativeType>
void ComboboxAdapter<ValueType, PropertyNativeType>::addSuggestion(const std::string& suggestedValue) {
	if (mCombobox) {
		mCombobox->addItem(new ColouredListItem(suggestedValue));

		// when we add any suggestions (they can't be removed), we immediately show the dropdown button
		// so that user can access the suggestions
		mCombobox->getPushButton()->setVisible(true);
	}
}

template<typename ValueType, typename PropertyNativeType>
void ComboboxAdapter<ValueType, PropertyNativeType>::randomize() {
	if (mCombobox) {
		if (mCombobox->getItemCount()) {
			WFMath::MTRand rand;
			auto index = rand.randInt((uint32_t) (mCombobox->getItemCount() - 1));
			mCombobox->setItemSelectState(index, true);
		}
	}
}

}

#endif
