/*
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 "info/media/info_media_inner_widget.h"

#include <rpl/flatten_latest.h>
#include "boxes/abstract_box.h"
#include "info/media/info_media_list_widget.h"
#include "info/media/info_media_buttons.h"
#include "info/media/info_media_empty_widget.h"
#include "info/profile/info_profile_button.h"
#include "info/profile/info_profile_icon.h"
#include "info/info_controller.h"
#include "ui/widgets/discrete_sliders.h"
#include "ui/widgets/shadow.h"
#include "ui/widgets/box_content_divider.h"
#include "ui/wrap/vertical_layout.h"
#include "ui/search_field_controller.h"
#include "styles/style_info.h"
#include "lang/lang_keys.h"

namespace Info {
namespace Media {

InnerWidget::InnerWidget(
	QWidget *parent,
	not_null<Controller*> controller)
: RpWidget(parent)
, _controller(controller)
, _empty(this) {
	_empty->heightValue(
	) | rpl::start_with_next(
		[this] { refreshHeight(); },
		_empty->lifetime());
	_list = setupList();
}

// Allows showing additional shared media links and tabs.
// Was done for top level tabs support.
// Now used for shared media in Saved Messages.
void InnerWidget::setupOtherTypes() {
	if (_controller->key().peer()->isSelf() && _isStackBottom) {
		createOtherTypes();
	} else {
		_otherTypes.destroy();
		refreshHeight();
	}
	//rpl::combine(
	//	_controller->wrapValue(),
	//	_controller->searchEnabledByContent()
	//) | rpl::start_with_next([this](Wrap wrap, bool enabled) {
	//	_searchEnabled = enabled;
	//	refreshSearchField();
	//}, lifetime());
}

void InnerWidget::createOtherTypes() {
	//_otherTabsShadow.create(this);
	//_otherTabsShadow->show();

	//_otherTabs = nullptr;
	_otherTypes.create(this);
	_otherTypes->show();

	createTypeButtons();
	_otherTypes->add(object_ptr<Ui::BoxContentDivider>(_otherTypes));
	//createTabs();

	_otherTypes->resizeToWidth(width());
	_otherTypes->heightValue(
	) | rpl::start_with_next(
		[this] { refreshHeight(); },
		_otherTypes->lifetime());
}

void InnerWidget::createTypeButtons() {
	auto wrap = _otherTypes->add(object_ptr<Ui::SlideWrap<Ui::VerticalLayout>>(
		_otherTypes,
		object_ptr<Ui::VerticalLayout>(_otherTypes)));
	auto content = wrap->entity();
	content->add(object_ptr<Ui::FixedHeightWidget>(
		content,
		st::infoProfileSkip));

	auto tracker = Ui::MultiSlideTracker();
	auto addMediaButton = [&](
			Type buttonType,
			const style::icon &icon) {
		if (buttonType == type()) {
			return;
		}
		auto result = AddButton(
			content,
			_controller,
			_controller->key().peer(),
			_controller->migrated(),
			buttonType,
			tracker);
		object_ptr<Profile::FloatingIcon>(
			result,
			icon,
			st::infoSharedMediaButtonIconPosition)->show();
	};
	//auto addCommonGroupsButton = [&](
	//		not_null<UserData*> user,
	//		const style::icon &icon) {
	//	auto result = AddCommonGroupsButton(
	//		content,
	//		_controller,
	//		user,
	//		tracker);
	//	object_ptr<Profile::FloatingIcon>(
	//		result,
	//		icon,
	//		st::infoSharedMediaButtonIconPosition)->show();
	//};

	addMediaButton(Type::Photo, st::infoIconMediaPhoto);
	addMediaButton(Type::Video, st::infoIconMediaVideo);
	addMediaButton(Type::File, st::infoIconMediaFile);
	addMediaButton(Type::MusicFile, st::infoIconMediaAudio);
	addMediaButton(Type::Link, st::infoIconMediaLink);
	if (auto user = _controller->key().peer()->asUser()) {
//		addCommonGroupsButton(user, st::infoIconMediaGroup);
	}
	addMediaButton(Type::RoundVoiceFile, st::infoIconMediaVoice);

	content->add(object_ptr<Ui::FixedHeightWidget>(
		content,
		st::infoProfileSkip));
	wrap->toggleOn(tracker.atLeastOneShownValue());
	wrap->finishAnimating();
}

//void InnerWidget::createTabs() {
//	_otherTabs = _otherTypes->add(object_ptr<Ui::SettingsSlider>(
//		this,
//		st::infoTabs));
//	auto sections = QStringList();
//	sections.push_back(tr::lng_media_type_photos(tr::now).toUpper());
//	sections.push_back(tr::lng_media_type_videos(tr::now).toUpper());
//	sections.push_back(tr::lng_media_type_files(tr::now).toUpper());
//	_otherTabs->setSections(sections);
//	_otherTabs->setActiveSection(*TypeToTabIndex(type()));
//	_otherTabs->finishAnimating();
//
//	_otherTabs->sectionActivated(
//	) | rpl::map([](int index) {
//		return TabIndexToType(index);
//	}) | rpl::start_with_next(
//		[this](Type newType) {
//			if (type() != newType) {
//				switchToTab(Memento(
//					_controller->peerId(),
//					_controller->migratedPeerId(),
//					newType));
//			}
//		},
//		_otherTabs->lifetime());
//}

Type InnerWidget::type() const {
	return _controller->section().mediaType();
}

void InnerWidget::visibleTopBottomUpdated(
		int visibleTop,
		int visibleBottom) {
	setChildVisibleTopBottom(_list, visibleTop, visibleBottom);
}

bool InnerWidget::showInternal(not_null<Memento*> memento) {
	if (!_controller->validateMementoPeer(memento)) {
		return false;
	}
	auto mementoType = memento->section().mediaType();
	if (mementoType == type()) {
		restoreState(memento);
		return true;

	// Allows showing additional shared media links and tabs.
	// Was done for top level tabs support.
	//
	//} else if (_otherTypes) {
	//	if (TypeToTabIndex(mementoType)) {
	//		switchToTab(std::move(*memento));
	//		return true;
	//	}

	}
	return false;
}

// Allows showing additional shared media links and tabs.
// Was done for top level tabs support.
//
//void InnerWidget::switchToTab(Memento &&memento) {
//	// Save state of the tab before setSection() call.
//	_controller->setSection(&memento);
//	_list = setupList();
//	restoreState(&memento);
//	_list->show();
//	_list->resizeToWidth(width());
//	refreshHeight();
//	if (_otherTypes) {
//		_otherTabsShadow->raise();
//		_otherTypes->raise();
//		_otherTabs->setActiveSection(*TypeToTabIndex(type()));
//	}
//}
//
//void InnerWidget::refreshSearchField() {
//	auto search = _controller->searchFieldController();
//	if (search && _otherTabs && _searchEnabled) {
//		_searchField = search->createRowView(
//			this,
//			st::infoMediaSearch);
//		_searchField->resizeToWidth(width());
//		_searchField->show();
//		search->queryChanges(
//		) | rpl::start_with_next([this] {
//			scrollToSearchField();
//		}, _searchField->lifetime());
//	} else {
//		_searchField = nullptr;
//	}
//}
//
//void InnerWidget::scrollToSearchField() {
//	Expects(_searchField != nullptr);
//
//	auto top = _searchField->y();
//	auto bottom = top + _searchField->height();
//	_scrollToRequests.fire({ top, bottom });
//}

object_ptr<ListWidget> InnerWidget::setupList() {
	auto result = object_ptr<ListWidget>(
		this,
		_controller);
	result->heightValue(
	) | rpl::start_with_next(
		[this] { refreshHeight(); },
		result->lifetime());
	using namespace rpl::mappers;
	result->scrollToRequests(
	) | rpl::map([widget = result.data()](int to) {
		return Ui::ScrollToRequest {
			widget->y() + to,
			-1
		};
	}) | rpl::start_to_stream(
		_scrollToRequests,
		result->lifetime());
	_selectedLists.fire(result->selectedListValue());
	_listTops.fire(result->topValue());
	_empty->setType(_controller->section().mediaType());
	_controller->mediaSourceQueryValue(
	) | rpl::start_with_next([this](const QString &query) {
		_empty->setSearchQuery(query);
	}, result->lifetime());
	return result;
}

void InnerWidget::saveState(not_null<Memento*> memento) {
	_list->saveState(memento);
}

void InnerWidget::restoreState(not_null<Memento*> memento) {
	_list->restoreState(memento);
}

rpl::producer<SelectedItems> InnerWidget::selectedListValue() const {
	return _selectedLists.events_starting_with(
		_list->selectedListValue()
	) | rpl::flatten_latest();
}

void InnerWidget::cancelSelection() {
	_list->cancelSelection();
}

InnerWidget::~InnerWidget() = default;

int InnerWidget::resizeGetHeight(int newWidth) {
	_inResize = true;
	auto guard = gsl::finally([this] { _inResize = false; });

	if (_otherTypes) {
		_otherTypes->resizeToWidth(newWidth);
		//_otherTabsShadow->resizeToWidth(newWidth);
	}
	//if (_searchField) {
	//	_searchField->resizeToWidth(newWidth);
	//}
	_list->resizeToWidth(newWidth);
	_empty->resizeToWidth(newWidth);
	return recountHeight();
}

void InnerWidget::refreshHeight() {
	if (_inResize) {
		return;
	}
	resize(width(), recountHeight());
}

int InnerWidget::recountHeight() {
	auto top = 0;
	if (_otherTypes) {
		_otherTypes->moveToLeft(0, top);
		top += _otherTypes->heightNoMargins() - st::lineWidth;
//		_otherTabsShadow->moveToLeft(0, top);
	}
	//if (_searchField) {
	//	_searchField->moveToLeft(0, top);
	//	top += _searchField->heightNoMargins() - st::lineWidth;
	//}
	auto listHeight = 0;
	if (_list) {
		_list->moveToLeft(0, top);
		listHeight = _list->heightNoMargins();
		top += listHeight;
	}
	if (listHeight > 0) {
		_empty->hide();
	} else {
		_empty->show();
		_empty->moveToLeft(0, top);
		top += _empty->heightNoMargins();
	}
	return top;
}

void InnerWidget::setScrollHeightValue(rpl::producer<int> value) {
	using namespace rpl::mappers;
	_empty->setFullHeight(rpl::combine(
		std::move(value),
		_listTops.events_starting_with(
			_list->topValue()
		) | rpl::flatten_latest(),
		_1 - _2));
}

rpl::producer<Ui::ScrollToRequest> InnerWidget::scrollToRequests() const {
	return _scrollToRequests.events();
}

} // namespace Media
} // namespace Info