/*
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
*/
#include "boxes/peers/edit_members_visible.h"

#include "boxes/peers/edit_peer_info_box.h"
#include "data/data_channel.h"
#include "ui/rp_widget.h"
#include "ui/wrap/vertical_layout.h"
#include "ui/wrap/slide_wrap.h"
#include "ui/widgets/buttons.h"
#include "ui/vertical_list.h"
#include "settings/settings_common.h" // IconDescriptor.
#include "main/main_app_config.h"
#include "main/main_session.h"
#include "apiwrap.h"
#include "lang/lang_keys.h"
#include "styles/style_info.h"
#include "styles/style_menu_icons.h"

namespace {

[[nodiscard]] int EnableHideMembersMin(not_null<ChannelData*> channel) {
	return channel->session().appConfig().get<int>(
		u"hidden_members_group_size_min"_q,
		100);
}

} // namespace

[[nodiscard]] object_ptr<Ui::RpWidget> CreateMembersVisibleButton(
		not_null<ChannelData*> megagroup) {
	const auto min = EnableHideMembersMin(megagroup);
	const auto showHideMembers = megagroup->canBanMembers()
		&& megagroup->membersCount() >= min;
	if (!showHideMembers) {
		return { nullptr };
	}

	auto result = object_ptr<Ui::VerticalLayout>((QWidget*)nullptr);
	const auto container = result.data();

	if (showHideMembers) {
		struct State {
			rpl::event_stream<bool> toggled;
		};
		Ui::AddSkip(container);
		const auto state = container->lifetime().make_state<State>();
		const auto button = container->add(
			EditPeerInfoBox::CreateButton(
				container,
				tr::lng_profile_hide_participants(),
				rpl::single(QString()),
				[] {},
				st::manageGroupNoIconButton,
				{}
		))->toggleOn(rpl::single(
			(megagroup->flags() & ChannelDataFlag::ParticipantsHidden) != 0
		) | rpl::then(state->toggled.events()));
		Ui::AddSkip(container);
		Ui::AddDividerText(
			container,
			tr::lng_profile_hide_participants_about());

		button->toggledValue(
		) | rpl::on_next([=](bool toggled) {
			megagroup->session().api().request(
				MTPchannels_ToggleParticipantsHidden(
					megagroup->inputChannel(),
					MTP_bool(toggled)
				)
			).done([=](const MTPUpdates &result) {
				megagroup->session().api().applyUpdates(result);
			}).send();
		}, button->lifetime());
	}

	return result;
}
