//
// 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 "calls/calls_call.h"
#include "mtproto/sender.h"

namespace Media {
namespace Audio {
class Track;
} // namespace Audio
} // namespace Media

namespace Calls {

class Panel;

class Instance : private MTP::Sender, private Call::Delegate, private base::Subscriber {
public:
	Instance();

	void startOutgoingCall(not_null<UserData *> user);
	void handleUpdate(const MTPDupdatePhoneCall &update);
	void showInfoPanel(not_null<Call *> call);

	base::Observable<Call *> &currentCallChanged() {
		return _currentCallChanged;
	}

	base::Observable<FullMsgId> &newServiceMessage() {
		return _newServiceMessage;
	}

	bool isQuitPrevent();

	~Instance();

private:
	not_null<Call::Delegate *> getCallDelegate() {
		return static_cast<Call::Delegate *>(this);
	}
	DhConfig getDhConfig() const override {
		return _dhConfig;
	}
	void callFinished(not_null<Call *> call) override;
	void callFailed(not_null<Call *> call) override;
	void callRedial(not_null<Call *> call) override;
	using Sound = Call::Delegate::Sound;
	void playSound(Sound sound) override;
	void createCall(not_null<UserData *> user, Call::Type type);
	void destroyCall(not_null<Call *> call);
	void destroyCurrentPanel();

	void refreshDhConfig();
	void refreshServerConfig();

	bool alreadyInCall();
	void handleCallUpdate(const MTPPhoneCall &call);

	DhConfig _dhConfig;

	TimeMs _lastServerConfigUpdateTime = 0;
	mtpRequestId _serverConfigRequestId = 0;

	std::unique_ptr<Call> _currentCall;
	std::unique_ptr<Panel> _currentCallPanel;
	base::Observable<Call *> _currentCallChanged;
	base::Observable<FullMsgId> _newServiceMessage;
	std::vector<QPointer<Panel>> _pendingPanels;

	std::unique_ptr<Media::Audio::Track> _callConnectingTrack;
	std::unique_ptr<Media::Audio::Track> _callEndedTrack;
	std::unique_ptr<Media::Audio::Track> _callBusyTrack;
};

Instance &Current();

} // namespace Calls