/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.

For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#pragma once

#include "data/data_statistics.h"
#include "mtproto/sender.h"

class ApiWrap;
class ChannelData;
class PeerData;

namespace Api {

class Statistics final {
public:
	explicit Statistics(not_null<ApiWrap*> api);

	[[nodiscard]] rpl::producer<rpl::no_value, QString> request(
		not_null<PeerData*> peer);
	using GraphResult = rpl::producer<Data::StatisticalGraph, QString>;
	[[nodiscard]] GraphResult requestZoom(
		not_null<PeerData*> peer,
		const QString &token,
		float64 x);
	[[nodiscard]] GraphResult requestMessage(
		not_null<PeerData*> peer,
		MsgId msgId);

	[[nodiscard]] Data::ChannelStatistics channelStats() const;
	[[nodiscard]] Data::SupergroupStatistics supergroupStats() const;

private:
	Data::ChannelStatistics _channelStats;
	Data::SupergroupStatistics _supergroupStats;
	MTP::Sender _api;

	std::deque<Fn<void()>> _zoomDeque;

};

class PublicForwards final {
public:
	explicit PublicForwards(not_null<ChannelData*> channel, FullMsgId fullId);

	void request(
		const Data::PublicForwardsSlice::OffsetToken &token,
		Fn<void(Data::PublicForwardsSlice)> done);

private:
	const not_null<ChannelData*> _channel;
	const FullMsgId _fullId;
	mtpRequestId _requestId = 0;
	int _lastTotal = 0;

	MTP::Sender _api;

};

class MessageStatistics final {
public:
	explicit MessageStatistics(
		not_null<ChannelData*> channel,
		FullMsgId fullId);

	void request(Fn<void(Data::MessageStatistics)> done);

	[[nodiscard]] Data::PublicForwardsSlice firstSlice() const;

private:
	PublicForwards _publicForwards;
	const not_null<ChannelData*> _channel;
	const FullMsgId _fullId;

	Data::PublicForwardsSlice _firstSlice;

	mtpRequestId _requestId = 0;
	MTP::Sender _api;

};

} // namespace Api