/*
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/report_box.h"

#include "lang/lang_keys.h"
#include "data/data_peer.h"
#include "main/main_session.h"
#include "boxes/confirm_box.h"
#include "ui/widgets/checkbox.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/input_fields.h"
#include "ui/toast/toast.h"
#include "mtproto/facade.h"
#include "mainwindow.h"
#include "styles/style_layers.h"
#include "styles/style_boxes.h"
#include "styles/style_profile.h"

namespace {

constexpr auto kReportReasonLengthMax = 200;

} // namespace

ReportBox::ReportBox(QWidget*, not_null<PeerData*> peer)
: _peer(peer) {
}

ReportBox::ReportBox(QWidget*, not_null<PeerData*> peer, MessageIdsList ids)
: _peer(peer)
, _ids(std::move(ids)) {
}

void ReportBox::prepare() {
	setTitle([&] {
		if (_ids) {
			return tr::lng_report_message_title();
		} else if (_peer->isUser()) {
			return tr::lng_report_bot_title();
		} else if (_peer->isMegagroup()) {
			return tr::lng_report_group_title();
		} else {
			return tr::lng_report_title();
		}
	}());

	addButton(tr::lng_report_button(), [=] { report(); });
	addButton(tr::lng_cancel(), [=] { closeBox(); });

	_reasonGroup = std::make_shared<Ui::RadioenumGroup<Reason>>(
		Reason::Spam);
	const auto createButton = [&](
			object_ptr<Ui::Radioenum<Reason>> &button,
			Reason reason,
			const QString &text) {
		button.create(
			this,
			_reasonGroup,
			reason,
			text,
			st::defaultBoxCheckbox);
	};
	createButton(_reasonSpam, Reason::Spam, tr::lng_report_reason_spam(tr::now));
	createButton(_reasonViolence, Reason::Violence, tr::lng_report_reason_violence(tr::now));
	if (_ids) {
		createButton(_reasonChildAbuse, Reason::ChildAbuse, tr::lng_report_reason_child_abuse(tr::now));
	}
	createButton(_reasonPornography, Reason::Pornography, tr::lng_report_reason_pornography(tr::now));
	createButton(_reasonOther, Reason::Other, tr::lng_report_reason_other(tr::now));
	_reasonGroup->setChangedCallback([=](Reason value) {
		reasonChanged(value);
	});

	updateMaxHeight();
}

void ReportBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);

	_reasonSpam->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), st::boxOptionListPadding.top() + _reasonSpam->getMargins().top());
	_reasonViolence->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), _reasonSpam->bottomNoMargins() + st::boxOptionListSkip);
	if (_ids) {
		_reasonChildAbuse->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), _reasonViolence->bottomNoMargins() + st::boxOptionListSkip);
		_reasonPornography->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), _reasonChildAbuse->bottomNoMargins() + st::boxOptionListSkip);
	}
	else{
		_reasonPornography->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), _reasonViolence->bottomNoMargins() + st::boxOptionListSkip);
	}
	_reasonOther->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left(), _reasonPornography->bottomNoMargins() + st::boxOptionListSkip);

	if (_reasonOtherText) {
		_reasonOtherText->moveToLeft(st::boxPadding.left() + st::boxOptionListPadding.left() - st::defaultInputField.textMargins.left(), _reasonOther->bottomNoMargins() + st::newGroupDescriptionPadding.top());
	}
}

void ReportBox::reasonChanged(Reason reason) {
	if (reason == Reason::Other) {
		if (!_reasonOtherText) {
			_reasonOtherText.create(
				this,
				st::profileReportReasonOther,
				Ui::InputField::Mode::MultiLine,
				tr::lng_report_reason_description());
			_reasonOtherText->show();
			_reasonOtherText->setSubmitSettings(_peer->session().settings().sendSubmitWay());
			_reasonOtherText->setMaxLength(kReportReasonLengthMax);
			_reasonOtherText->resize(width() - (st::boxPadding.left() + st::boxOptionListPadding.left() + st::boxPadding.right()), _reasonOtherText->height());

			updateMaxHeight();
			connect(_reasonOtherText, &Ui::InputField::resized, [=] { reasonResized(); });
			connect(_reasonOtherText, &Ui::InputField::submitted, [=] { report(); });
			connect(_reasonOtherText, &Ui::InputField::cancelled, [=] { closeBox(); });
		}
		_reasonOtherText->setFocusFast();
	} else if (_reasonOtherText) {
		_reasonOtherText.destroy();
		updateMaxHeight();
	}
}

void ReportBox::setInnerFocus() {
	if (_reasonOtherText) {
		_reasonOtherText->setFocusFast();
	} else {
		setFocus();
	}
}

void ReportBox::reasonResized() {
	updateMaxHeight();
	update();
}

void ReportBox::report() {
	if (_requestId) return;

	if (_reasonOtherText && _reasonOtherText->getLastText().trimmed().isEmpty()) {
		_reasonOtherText->showError();
		return;
	}

	const auto reason = [&] {
		switch (_reasonGroup->value()) {
		case Reason::Spam: return MTP_inputReportReasonSpam();
		case Reason::Violence: return MTP_inputReportReasonViolence();
		case Reason::ChildAbuse: return MTP_inputReportReasonChildAbuse();
		case Reason::Pornography: return MTP_inputReportReasonPornography();
		case Reason::Other: return MTP_inputReportReasonOther(MTP_string(_reasonOtherText->getLastText()));
		}
		Unexpected("Bad reason group value.");
	}();
	if (_ids) {
		auto ids = QVector<MTPint>();
		for (const auto &fullId : *_ids) {
			ids.push_back(MTP_int(fullId.msg));
		}
		_requestId = MTP::send(
			MTPmessages_Report(
				_peer->input,
				MTP_vector<MTPint>(ids),
				reason),
			rpcDone(&ReportBox::reportDone),
			rpcFail(&ReportBox::reportFail));
	} else {
		_requestId = MTP::send(
			MTPaccount_ReportPeer(_peer->input, reason),
			rpcDone(&ReportBox::reportDone),
			rpcFail(&ReportBox::reportFail));
	}
}

void ReportBox::reportDone(const MTPBool &result) {
	_requestId = 0;
	Ui::Toast::Show(tr::lng_report_thanks(tr::now));
	closeBox();
}

bool ReportBox::reportFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) {
		return false;
	}

	_requestId = 0;
	if (_reasonOtherText) {
		_reasonOtherText->showError();
	}
	return true;
}

void ReportBox::updateMaxHeight() {
	const auto buttonsCount = _ids ? 5 : 4;
	auto newHeight = st::boxOptionListPadding.top() + _reasonSpam->getMargins().top() + buttonsCount * _reasonSpam->heightNoMargins() + (buttonsCount - 1) * st::boxOptionListSkip + _reasonSpam->getMargins().bottom() + st::boxOptionListPadding.bottom();

	if (_reasonOtherText) {
		newHeight += st::newGroupDescriptionPadding.top() + _reasonOtherText->height() + st::newGroupDescriptionPadding.bottom();
	}
	setDimensions(st::boxWidth, newHeight);
}
