/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop 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/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#pragma once

#include "ui/rp_widget.h"
#include "base/timer.h"

namespace Ui {
class UserpicButton;
class RoundButton;
class IconButton;
class DropdownMenu;
} // namespace Ui

namespace Window {
class Controller;
} // namespace Window

class HistoryTopBarWidget : public Ui::RpWidget, private base::Subscriber {
public:
	HistoryTopBarWidget(
		QWidget *parent,
		not_null<Window::Controller*> controller);

	struct SelectedState {
		bool textSelected = false;
		int count = 0;
		int canDeleteCount = 0;
		int canForwardCount = 0;
	};

	void updateControlsVisibility();
	void showSelected(SelectedState state);
	void animationFinished();
	rpl::producer<bool> membersShowAreaActive() const {
		return _membersShowAreaActive.events();
	}

	void setHistoryPeer(not_null<PeerData*> historyPeer);

	void clicked();
	static void paintUnreadCounter(
		Painter &p,
		int outerWidth,
		PeerData *substractPeer = nullptr);

protected:
	void paintEvent(QPaintEvent *e) override;
	void mousePressEvent(QMouseEvent *e) override;
	void resizeEvent(QResizeEvent *e) override;
	bool eventFilter(QObject *obj, QEvent *e) override;

private:
	void refreshLang();
	void updateControlsGeometry();
	void selectedShowCallback();
	void updateInfoToggleActive();

	void onForwardSelection();
	void onDeleteSelection();
	void onClearSelection();
	void onInfoClicked();
	void onCall();
	void onSearch();
	void showMenu();
	void toggleInfoSection();

	void updateAdaptiveLayout();
	int countSelectedButtonsTop(float64 selectedShown);

	void paintTopBar(Painter &p, int decreaseWidth, TimeMs ms);
	QRect getMembersShowAreaGeometry() const;
	void updateMembersShowArea();
	void updateOnlineDisplay();
	void updateOnlineDisplayTimer();
	void updateOnlineDisplayIn(TimeMs timeout);

	not_null<Window::Controller*> _controller;
	PeerData *_historyPeer = nullptr;

	int _selectedCount = 0;
	bool _canDelete = false;
	bool _canForward = false;

	Animation _selectedShown;

	object_ptr<Ui::RoundButton> _clearSelection;
	object_ptr<Ui::RoundButton> _forward, _delete;

	object_ptr<Ui::UserpicButton> _info = { nullptr };

	object_ptr<Ui::IconButton> _call;
	object_ptr<Ui::IconButton> _search;
	object_ptr<Ui::IconButton> _infoToggle;
	object_ptr<Ui::IconButton> _menuToggle;
	object_ptr<Ui::DropdownMenu> _menu = { nullptr };

	object_ptr<TWidget> _membersShowArea = { nullptr };
	rpl::event_stream<bool> _membersShowAreaActive;

	QString _titlePeerText;
	bool _titlePeerTextOnline = false;
	int _titlePeerTextWidth = 0;

	int _unreadCounterSubscription = 0;
	base::Timer _onlineUpdater;

};