//
// This file is part of Kepka,
// an unofficial desktop version of Telegram messaging app,
// see https://github.com/procxx/kepka
//
// Kepka 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 3 of the License, or
// (at your option) any later version.
//
// It 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.
//
// In addition, as a special exception, the copyright holders give permission
// to link the code of portions of this program with the OpenSSL library.
//
// Full license: https://github.com/procxx/kepka/blob/master/LICENSE
// Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
// Copyright (c) 2017- Kepka Contributors, https://github.com/procxx
//
#pragma once

#include "boxes/abstract_box.h"
#include "styles/style_widgets.h"
#include "ui/effects/ripple_animation.h"

QString findValidCode(QString fullCode);

namespace Ui {
class MultiSelect;
} // namespace Ui

class CountryInput : public TWidget {
	Q_OBJECT

public:
	CountryInput(QWidget *parent, const style::InputField &st);

public slots:
	void onChooseCode(const QString &code);
	bool onChooseCountry(const QString &country);

signals:
	void codeChanged(const QString &code);

protected:
	void paintEvent(QPaintEvent *e) override;
	void mouseMoveEvent(QMouseEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void enterEventHook(QEvent *e) override;
	void leaveEventHook(QEvent *e) override;

private:
	void setText(const QString &newText);

	const style::InputField &_st;
	bool _active = false;
	QString _text;
	QPainterPath _placeholderPath;
};

class CountrySelectBox : public BoxContent {
	Q_OBJECT

public:
	CountrySelectBox(QWidget *);

signals:
	void countryChosen(const QString &iso);

protected:
	void prepare() override;
	void setInnerFocus() override;

	void keyPressEvent(QKeyEvent *e) override;
	void resizeEvent(QResizeEvent *e) override;

private slots:
	void onSubmit();

private:
	void onFilterUpdate(const QString &query);

	object_ptr<Ui::MultiSelect> _select;

	class Inner;
	QPointer<Inner> _inner;
};

// This class is hold in header because it requires Qt preprocessing.
class CountrySelectBox::Inner : public TWidget {
	Q_OBJECT

public:
	Inner(QWidget *parent);

	void updateFilter(QString filter = QString());

	void selectSkip(qint32 dir);
	void selectSkipPage(qint32 h, qint32 dir);

	void chooseCountry();

	void refresh();

	~Inner();

signals:
	void countryChosen(const QString &iso);
	void mustScrollTo(int ymin, int ymax);

protected:
	void paintEvent(QPaintEvent *e) override;
	void enterEventHook(QEvent *e) override;
	void leaveEventHook(QEvent *e) override;
	void mouseMoveEvent(QMouseEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void mouseReleaseEvent(QMouseEvent *e) override;

private:
	void updateSelected() {
		updateSelected(mapFromGlobal(QCursor::pos()));
	}
	void updateSelected(QPoint localPos);
	void updateSelectedRow();
	void updateRow(int index);
	void setPressed(int pressed);

	int _rowHeight;

	int _selected = -1;
	int _pressed = -1;
	QString _filter;
	bool _mouseSelection = false;

	std::vector<std::unique_ptr<Ui::RippleAnimation>> _ripples;
};