//
// 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 "base/timer.h"
#include "window/window_title.h"
#include <QIcon>
#include <QMimeData>
#include <QTimer>

class MediaView;
class TWidget;

namespace Window {

class Controller;
class TitleWidget;

QImage LoadLogo();
QImage LoadLogoNoMargin();
QIcon CreateIcon();

class MainWindow : public QWidget, protected base::Subscriber {
	Q_OBJECT

public:
	MainWindow();

	Window::Controller *controller() const {
		return _controller.get();
	}
	void setInactivePress(bool inactive);
	bool wasInactivePress() const {
		return _wasInactivePress;
	}

	bool hideNoQuit();

	void init();
	HitTestResult hitTest(const QPoint &p) const;
	void updateIsActive(int timeout);
	bool isActive() const {
		return _isActive;
	}

	bool positionInited() const {
		return _positionInited;
	}
	void positionUpdated();

	bool titleVisible() const;
	void setTitleVisible(bool visible);
	QString titleText() const {
		return _titleText;
	}

	void reActivateWindow() {
#if defined Q_OS_LINUX32 || defined Q_OS_LINUX64
		onReActivate();
		QTimer::singleShot(200, this, SLOT(onReActivate()));
#endif // Q_OS_LINUX32 || Q_OS_LINUX64
	}

	void showRightColumn(object_ptr<TWidget> widget);
	bool canExtendWidthBy(int addToWidth);
	void tryToExtendWidthBy(int addToWidth);

	virtual void updateTrayMenu(bool force = false) {}

	virtual ~MainWindow();

	TWidget *bodyWidget() {
		return _body.data();
	}

	void launchDrag(std::unique_ptr<QMimeData> data);
	base::Observable<void> &dragFinished() {
		return _dragFinished;
	}
	base::Observable<void> &widgetGrabbed() {
		return _widgetGrabbed;
	}

public slots:
	bool minimizeToTray();
	void updateGlobalMenu() {
		updateGlobalMenuHook();
	}

protected:
	void resizeEvent(QResizeEvent *e) override;

	void savePosition(Qt::WindowState state = Qt::WindowActive);
	void handleStateChanged(Qt::WindowState state);
	void handleActiveChanged();

	virtual void initHook() {}

	virtual void updateIsActiveHook() {}

	void clearWidgets();
	virtual void clearWidgetsHook() {}

	virtual void updateWindowIcon();

	virtual void stateChangedHook(Qt::WindowState state) {}

	virtual void titleVisibilityChangedHook() {}

	virtual void unreadCounterChangedHook() {}

	virtual void closeWithoutDestroy() {
		hide();
	}

	virtual void updateGlobalMenuHook() {}

	virtual bool hasTrayIcon() const {
		return false;
	}
	virtual void showTrayTooltip() {}

	virtual void workmodeUpdated(DBIWorkMode mode) {}

	virtual void updateControlsGeometry();

	// This one is overriden in Windows for historical reasons.
	virtual qint32 screenNameChecksum(const QString &name) const;

	void setPositionInited();

private slots:
	void savePositionByTimer() {
		savePosition();
	}
	void onReActivate();

private:
	void checkAuthSession();
	void updatePalette();
	void updateUnreadCounter();
	void initSize();

	bool computeIsActive() const;

	object_ptr<QTimer> _positionUpdatedTimer;
	bool _positionInited = false;

	std::unique_ptr<Window::Controller> _controller;
	object_ptr<TitleWidget> _title = {nullptr};
	object_ptr<TWidget> _body;
	object_ptr<TWidget> _rightColumn = {nullptr};

	QIcon _icon;
	QString _titleText;

	bool _isActive = false;
	base::Timer _isActiveTimer;
	bool _wasInactivePress = false;
	base::Timer _inactivePressTimer;

	base::Observable<void> _dragFinished;
	base::Observable<void> _widgetGrabbed;
};

} // namespace Window