/*
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 "settings/business/settings_greeting.h"

#include "base/event_filter.h"
#include "core/application.h"
#include "data/business/data_business_info.h"
#include "data/business/data_shortcut_messages.h"
#include "data/data_session.h"
#include "lang/lang_keys.h"
#include "main/main_session.h"
#include "settings/business/settings_shortcut_messages.h"
#include "settings/business/settings_recipients_helper.h"
#include "ui/boxes/time_picker_box.h"
#include "ui/layers/generic_box.h"
#include "ui/text/text_utilities.h"
#include "ui/toast/toast.h"
#include "ui/widgets/box_content_divider.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/vertical_drum_picker.h"
#include "ui/wrap/slide_wrap.h"
#include "ui/wrap/vertical_layout.h"
#include "ui/vertical_list.h"
#include "window/window_session_controller.h"
#include "styles/style_layers.h"
#include "styles/style_settings.h"

namespace Settings {
namespace {

constexpr auto kDefaultNoActivityDays = 7;

class Greeting : public BusinessSection<Greeting> {
public:
	Greeting(
		QWidget *parent,
		not_null<Window::SessionController*> controller);
	~Greeting();

	[[nodiscard]] bool closeByOutsideClick() const override;
	[[nodiscard]] rpl::producer<QString> title() override;

	const Ui::RoundRect *bottomSkipRounding() const override {
		return &_bottomSkipRounding;
	}

private:
	void setupContent(not_null<Window::SessionController*> controller);
	void save();

	Ui::RoundRect _bottomSkipRounding;

	rpl::variable<Data::BusinessRecipients> _recipients;
	rpl::variable<bool> _canHave;
	rpl::event_stream<> _deactivateOnAttempt;
	rpl::variable<int> _noActivityDays;
	rpl::variable<bool> _enabled;

};

Greeting::Greeting(
	QWidget *parent,
	not_null<Window::SessionController*> controller)
: BusinessSection(parent, controller)
, _bottomSkipRounding(st::boxRadius, st::boxDividerBg) {
	setupContent(controller);
}

void EditPeriodBox(
		not_null<Ui::GenericBox*> box,
		int days,
		Fn<void(int)> save) {
	auto values = std::vector{ 7, 14, 21, 28 };
	if (!ranges::contains(values, days)) {
		values.push_back(days);
		ranges::sort(values);
	}

	const auto phrases = ranges::views::all(
		values
	) | ranges::views::transform([](int days) {
		return tr::lng_days(tr::now, lt_count, days);
	}) | ranges::to_vector;
	const auto take = TimePickerBox(box, values, phrases, days);

	box->addButton(tr::lng_settings_save(), [=] {
		const auto weak = Ui::MakeWeak(box);
		save(take());
		if (const auto strong = weak.data()) {
			strong->closeBox();
		}
	});
	box->addButton(tr::lng_cancel(), [=] {
		box->closeBox();
	});
}

Greeting::~Greeting() {
	if (!Core::Quitting()) {
		save();
	}
}

bool Greeting::closeByOutsideClick() const {
	return false;
}

rpl::producer<QString> Greeting::title() {
	return tr::lng_greeting_title();
}

void Greeting::setupContent(
		not_null<Window::SessionController*> controller) {
	using namespace rpl::mappers;

	const auto content = Ui::CreateChild<Ui::VerticalLayout>(this);
	const auto info = &controller->session().data().businessInfo();
	const auto current = info->greetingSettings();
	const auto disabled = !current.noActivityDays;

	_recipients = disabled
		? Data::BusinessRecipients{ .allButExcluded = true }
		: current.recipients;
	_noActivityDays = disabled
		? kDefaultNoActivityDays
		: current.noActivityDays;

	AddDividerTextWithLottie(content, {
		.lottie = u"greeting"_q,
		.lottieSize = st::settingsCloudPasswordIconSize,
		.lottieMargins = st::peerAppearanceIconPadding,
		.showFinished = showFinishes(),
		.about = tr::lng_greeting_about(Ui::Text::WithEntities),
		.aboutMargins = st::peerAppearanceCoverLabelMargin,
	});

	const auto session = &controller->session();
	_canHave = rpl::combine(
		ShortcutsCountValue(session),
		ShortcutsLimitValue(session),
		ShortcutExistsValue(session, u"hello"_q),
		(_1 < _2) || _3);

	Ui::AddSkip(content);
	const auto enabled = content->add(object_ptr<Ui::SettingsButton>(
		content,
		tr::lng_greeting_enable(),
		st::settingsButtonNoIcon
	))->toggleOn(rpl::single(
		!disabled
	) | rpl::then(rpl::merge(
		_canHave.value() | rpl::filter(!_1),
		_deactivateOnAttempt.events() | rpl::map_to(false)
	)));

	_enabled = enabled->toggledValue();
	_enabled.value() | rpl::filter(_1) | rpl::start_with_next([=] {
		if (!_canHave.current()) {
			controller->showToast({
				.text = { tr::lng_greeting_limit_reached(tr::now) },
				.adaptive = true,
			});
			_deactivateOnAttempt.fire({});
		}
	}, lifetime());

	Ui::AddSkip(content);

	content->add(
		object_ptr<Ui::SlideWrap<Ui::BoxContentDivider>>(
			content,
			object_ptr<Ui::BoxContentDivider>(
				content,
				st::boxDividerHeight,
				st::boxDividerBg,
				RectPart::Top))
	)->setDuration(0)->toggleOn(enabled->toggledValue() | rpl::map(!_1));
	content->add(
		object_ptr<Ui::SlideWrap<Ui::BoxContentDivider>>(
			content,
			object_ptr<Ui::BoxContentDivider>(
				content))
	)->setDuration(0)->toggleOn(enabled->toggledValue());

	const auto wrap = content->add(
		object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
			content,
			object_ptr<Ui::VerticalLayout>(content)));
	const auto inner = wrap->entity();

	const auto createWrap = inner->add(
		object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
			inner,
			object_ptr<Ui::VerticalLayout>(inner)));
	const auto createInner = createWrap->entity();
	Ui::AddSkip(createInner);
	const auto create = AddButtonWithLabel(
		createInner,
		rpl::conditional(
			ShortcutExistsValue(session, u"hello"_q),
			tr::lng_business_edit_messages(),
			tr::lng_greeting_create()),
		ShortcutMessagesCountValue(
			session,
			u"hello"_q
		) | rpl::map([=](int count) {
			return count
				? tr::lng_forum_messages(tr::now, lt_count, count)
				: QString();
		}),
		st::settingsButtonLightNoIcon);
	create->setClickedCallback([=] {
		const auto owner = &controller->session().data();
		const auto id = owner->shortcutMessages().emplaceShortcut("hello");
		showOther(ShortcutMessagesId(id));
	});
	Ui::AddSkip(createInner);
	Ui::AddDivider(createInner);

	createWrap->toggleOn(rpl::single(true));

	Ui::AddSkip(inner);
	AddBusinessRecipientsSelector(inner, {
		.controller = controller,
		.title = tr::lng_greeting_recipients(),
		.data = &_recipients,
	});

	Ui::AddSkip(inner);
	Ui::AddDivider(inner);
	Ui::AddSkip(inner);

	AddButtonWithLabel(
		inner,
		tr::lng_greeting_period_title(),
		_noActivityDays.value(
		) | rpl::map(
			[](int days) { return tr::lng_days(tr::now, lt_count, days); }
		),
		st::settingsButtonNoIcon
	)->setClickedCallback([=] {
		controller->show(Box(
			EditPeriodBox,
			_noActivityDays.current(),
			[=](int days) { _noActivityDays = days; }));
	});

	Ui::AddSkip(inner);
	Ui::AddDividerText(
		inner,
		tr::lng_greeting_period_about(),
		st::settingsChatbotsBottomTextMargin,
		RectPart::Top);

	wrap->toggleOn(enabled->toggledValue());
	wrap->finishAnimating();

	Ui::ResizeFitChild(this, content);
}

void Greeting::save() {
	const auto show = controller()->uiShow();
	const auto session = &controller()->session();
	const auto fail = [=](QString error) {
		if (error == u"BUSINESS_RECIPIENTS_EMPTY"_q) {
			show->showToast(tr::lng_greeting_recipients_empty(tr::now));
		} else if (error != u"SHORTCUT_INVALID"_q) {
			show->showToast(error);
		}
	};
	session->data().businessInfo().saveGreetingSettings(
		_enabled.current() ? Data::GreetingSettings{
			.recipients = _recipients.current(),
			.noActivityDays = _noActivityDays.current(),
			.shortcutId = LookupShortcutId(session, u"hello"_q),
		} : Data::GreetingSettings(),
		fail);
}

} // namespace

Type GreetingId() {
	return Greeting::Id();
}

} // namespace Settings