/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop 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/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2017 John Preston, https://desktop.telegram.org
*/
#include "ui/search_field_controller.h"

#include "styles/style_widgets.h"
#include "ui/wrap/padding_wrap.h"
#include "ui/widgets/input_fields.h"
#include "ui/widgets/shadow.h"
#include "ui/widgets/buttons.h"
#include "lang/lang_keys.h"

namespace Ui {

SearchFieldController::SearchFieldController(const QString &query)
: _query(query) {
}

base::unique_qptr<Ui::RpWidget> SearchFieldController::createRowView(
		QWidget *parent,
		const style::SearchFieldRow &st) {
	auto result = base::make_unique_q<Ui::FixedHeightWidget>(
		parent,
		st.height);
	auto wrap = result.get();

	auto field = createField(wrap, st.field).release();
	field->show();
	field->connect(field, &Ui::InputField::cancelled, [=] {
		field->setText(QString());
	});

	auto cancel = CreateChild<Ui::CrossButton>(
		wrap,
		st.fieldCancel);
	cancel->addClickHandler([=] {
		field->setText(QString());
	});
	queryValue()
		| rpl::map([](const QString &value) {
			return !value.isEmpty();
		})
		| rpl::start_with_next([cancel](bool shown) {
			cancel->toggleAnimated(shown);
		}, cancel->lifetime());
	cancel->finishAnimations();

	auto shadow = CreateChild<Ui::PlainShadow>(wrap);
	shadow->show();

	wrap->widthValue()
		| rpl::start_with_next([=, &st](int newWidth) {
			auto availableWidth = newWidth
				- st.fieldIconSkip
				- st.fieldCancelSkip;
			field->setGeometryToLeft(
				st.padding.left() + st.fieldIconSkip,
				st.padding.top(),
				availableWidth,
				field->height());
			cancel->moveToRight(0, 0);
			shadow->setGeometry(
				0,
				st.height - st::lineWidth,
				newWidth,
				st::lineWidth);
		}, wrap->lifetime());
	wrap->paintRequest()
		| rpl::start_with_next([=, &st] {
			Painter p(wrap);
			st.fieldIcon.paint(
				p,
				st.padding.left(),
				st.padding.top(),
				wrap->width());
		}, wrap->lifetime());

	_view.release();
	_view.reset(wrap);
	return std::move(result);
}

base::unique_qptr<Ui::InputField> SearchFieldController::createField(
		QWidget *parent,
		const style::InputField &st) {
	auto result = base::make_unique_q<Ui::InputField>(
		parent,
		st,
		langFactory(lng_dlg_filter),
		_query.current());
	auto field = result.get();
	field->connect(field, &Ui::InputField::changed, [=] {
		_query = field->getLastText();
	});
	_view.reset(field);
	return result;
}

} // namespace Ui