/*
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 "ui/boxes/confirm_box.h"

#include "lang/lang_keys.h"
#include "ui/rect.h"
#include "ui/widgets/buttons.h"
#include "styles/style_layers.h"

namespace Ui {

void ConfirmBox(not_null<Ui::GenericBox*> box, ConfirmBoxArgs &&args) {
	const auto weak = Ui::MakeWeak(box);
	const auto lifetime = box->lifetime().make_state<rpl::lifetime>();

	const auto withTitle = !v::is_null(args.title);
	if (withTitle) {
		box->setTitle(v::text::take_marked(std::move(args.title)));
	}

	if (!v::is_null(args.text)) {
		const auto padding = st::boxPadding;
		const auto use = args.labelPadding
			? *args.labelPadding
			: withTitle
			? QMargins(padding.left(), 0, padding.right(), padding.bottom())
			: padding;
		const auto label = box->addRow(
			object_ptr<Ui::FlatLabel>(
				box.get(),
				v::text::take_marked(std::move(args.text)),
				args.labelStyle ? *args.labelStyle : st::boxLabel),
			use);
		if (args.labelFilter) {
			label->setClickHandlerFilter(std::move(args.labelFilter));
		}
	}

	const auto prepareCallback = [&](ConfirmBoxArgs::Callback &callback) {
		return [=, confirmed = std::move(callback)]() {
			if (const auto callbackPtr = std::get_if<1>(&confirmed)) {
				if (auto callback = (*callbackPtr)) {
					callback();
				}
			} else if (const auto callbackPtr = std::get_if<2>(&confirmed)) {
				if (auto callback = (*callbackPtr)) {
					callback(crl::guard(weak, [=] { weak->closeBox(); }));
				}
			} else if (weak) {
				weak->closeBox();
			}
		};
	};

	const auto &defaultButtonStyle = box->getDelegate()->style().button;

	const auto confirmButton = box->addButton(
		v::text::take_plain(std::move(args.confirmText), tr::lng_box_ok()),
		[=, c = prepareCallback(args.confirmed)]() {
			lifetime->destroy();
			c();
		},
		args.confirmStyle ? *args.confirmStyle : defaultButtonStyle);
	box->events(
	) | rpl::start_with_next([=](not_null<QEvent*> e) {
		if ((e->type() != QEvent::KeyPress) || !confirmButton) {
			return;
		}
		const auto k = static_cast<QKeyEvent*>(e.get());
		if (k->key() == Qt::Key_Enter || k->key() == Qt::Key_Return) {
			confirmButton->clicked(Qt::KeyboardModifiers(), Qt::LeftButton);
		}
	}, box->lifetime());

	if (!args.inform) {
		const auto cancelButton = box->addButton(
			v::text::take_plain(std::move(args.cancelText), tr::lng_cancel()),
			crl::guard(weak, [=, c = prepareCallback(args.cancelled)]() {
				lifetime->destroy();
				c();
			}),
			args.cancelStyle ? *args.cancelStyle : defaultButtonStyle);

		box->boxClosing(
		) | rpl::start_with_next(crl::guard(cancelButton, [=] {
			cancelButton->clicked(Qt::KeyboardModifiers(), Qt::LeftButton);
		}), *lifetime);
	}

	if (args.strictCancel) {
		lifetime->destroy();
	}
}

object_ptr<Ui::GenericBox> MakeConfirmBox(ConfirmBoxArgs &&args) {
	return Box(ConfirmBox, std::move(args));
}

void IconWithTitle(
		not_null<VerticalLayout*> container,
		not_null<RpWidget*> icon,
		not_null<RpWidget*> title,
		RpWidget *subtitle) {
	const auto line = container->add(
		object_ptr<RpWidget>(container),
		st::boxRowPadding);
	icon->setParent(line);
	title->setParent(line);
	if (subtitle) {
		subtitle->setParent(line);
	}

	icon->heightValue(
	) | rpl::start_with_next([=](int height) {
		line->resize(line->width(), height);
	}, icon->lifetime());

	line->widthValue(
	) | rpl::start_with_next([=](int width) {
		icon->moveToLeft(0, 0);
		const auto skip = st::defaultBoxCheckbox.textPosition.x();
		title->resizeToWidth(width - rect::right(icon) - skip);
		if (subtitle) {
			subtitle->resizeToWidth(title->width());
			title->moveToLeft(rect::right(icon) + skip, icon->y());
			subtitle->moveToLeft(
				title->x(),
				icon->y() + icon->height() - subtitle->height());
		} else {
			title->moveToLeft(
				rect::right(icon) + skip,
				((icon->height() - title->height()) / 2));
		}
	}, title->lifetime());

	icon->setAttribute(Qt::WA_TransparentForMouseEvents);
	title->setAttribute(Qt::WA_TransparentForMouseEvents);
}

} // namespace Ui