/*
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 "boxes/send_files_box.h"

#include "lang.h"
#include "storage/localstorage.h"
#include "mainwidget.h"
#include "history/history_media_types.h"
#include "core/file_utilities.h"
#include "ui/widgets/checkbox.h"
#include "ui/widgets/buttons.h"
#include "ui/widgets/input_fields.h"
#include "styles/style_history.h"
#include "styles/style_boxes.h"
#include "media/media_clip_reader.h"
#include "mainwindow.h"

namespace {

constexpr auto kMinPreviewWidth = 20;

bool ValidatePhotoDimensions(int width, int height) {
	return (width > 0) && (height > 0) && (width < 20 * height) && (height < 20 * width);
}

} // namespace

SendFilesBox::SendFilesBox(QWidget*, QImage image, CompressConfirm compressed)
: _image(image)
, _compressConfirm(compressed)
, _caption(this, st::confirmCaptionArea, lang(lng_photo_caption)) {
	_files.push_back(QString());
	prepareSingleFileLayout();
}

SendFilesBox::SendFilesBox(QWidget*, const QStringList &files, CompressConfirm compressed)
: _files(files)
, _compressConfirm(compressed)
, _caption(this, st::confirmCaptionArea, lang(_files.size() > 1 ? lng_photos_comment : lng_photo_caption)) {
	if (_files.size() == 1) {
		prepareSingleFileLayout();
	}
}

void SendFilesBox::prepareSingleFileLayout() {
	t_assert(_files.size() == 1);
	if (!_files.front().isEmpty()) {
		tryToReadSingleFile();
	}

	if (_image.isNull() || !ValidatePhotoDimensions(_image.width(), _image.height()) || _animated) {
		_compressConfirm = CompressConfirm::None;
	}

	if (!_image.isNull()) {
		auto image = _image;
		if (!_animated && _compressConfirm == CompressConfirm::None) {
			auto originalWidth = image.width();
			auto originalHeight = image.height();
			auto thumbWidth = st::msgFileThumbSize;
			if (originalWidth > originalHeight) {
				thumbWidth = (originalWidth * st::msgFileThumbSize) / originalHeight;
			}
			auto options = Images::Option::Smooth | Images::Option::RoundedSmall | Images::Option::RoundedTopLeft | Images::Option::RoundedTopRight | Images::Option::RoundedBottomLeft | Images::Option::RoundedBottomRight;
			_fileThumb = Images::pixmap(image, thumbWidth * cIntRetinaFactor(), 0, options, st::msgFileThumbSize, st::msgFileThumbSize);
		} else {
			auto maxW = 0;
			auto maxH = 0;
			if (_animated) {
				auto limitW = st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
				auto limitH = st::confirmMaxHeight;
				maxW = qMax(image.width(), 1);
				maxH = qMax(image.height(), 1);
				if (maxW * limitH > maxH * limitW) {
					if (maxW < limitW) {
						maxH = maxH * limitW / maxW;
						maxW = limitW;
					}
				} else {
					if (maxH < limitH) {
						maxW = maxW * limitH / maxH;
						maxH = limitH;
					}
				}
				image = Images::prepare(image, maxW * cIntRetinaFactor(), maxH * cIntRetinaFactor(), Images::Option::Smooth | Images::Option::Blurred, maxW, maxH);
			}
			auto originalWidth = image.width();
			auto originalHeight = image.height();
			if (!originalWidth || !originalHeight) {
				originalWidth = originalHeight = 1;
			}
			_previewWidth = st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
			if (image.width() < _previewWidth) {
				_previewWidth = qMax(image.width(), kMinPreviewWidth);
			}
			auto maxthumbh = qMin(qRound(1.5 * _previewWidth), st::confirmMaxHeight);
			_previewHeight = qRound(originalHeight * float64(_previewWidth) / originalWidth);
			if (_previewHeight > maxthumbh) {
				_previewWidth = qRound(_previewWidth * float64(maxthumbh) / _previewHeight);
				accumulate_max(_previewWidth, kMinPreviewWidth);
				_previewHeight = maxthumbh;
			}
			_previewLeft = (st::boxWideWidth - _previewWidth) / 2;

			image = std::move(image).scaled(_previewWidth * cIntRetinaFactor(), _previewHeight * cIntRetinaFactor(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
			image = Images::prepareOpaque(std::move(image));
			_preview = App::pixmapFromImageInPlace(std::move(image));
			_preview.setDevicePixelRatio(cRetinaFactor());

			prepareGifPreview();
		}
	}
	if (_preview.isNull()) {
		prepareDocumentLayout();
	}
}

void SendFilesBox::prepareGifPreview() {
	auto createGifPreview = [this] {
		if (!_information) {
			return false;
		}
		if (auto video = base::get_if<FileLoadTask::Video>(&_information->media)) {
			return video->isGifv;
		}
		// Plain old .gif animation.
		return _animated;
	};
	if (createGifPreview()) {
		_gifPreview = Media::Clip::MakeReader(FileLocation(_files.front()), QByteArray(), [this](Media::Clip::Notification notification) {
			clipCallback(notification);
		});
		if (_gifPreview) _gifPreview->setAutoplay();
	}
}

void SendFilesBox::clipCallback(Media::Clip::Notification notification) {
	using namespace Media::Clip;
	switch (notification) {
	case NotificationReinit: {
		if (_gifPreview && _gifPreview->state() == State::Error) {
			_gifPreview.setBad();
		}

		if (_gifPreview && _gifPreview->ready() && !_gifPreview->started()) {
			auto s = QSize(_previewWidth, _previewHeight);
			_gifPreview->start(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None);
		}

		update();
	} break;

	case NotificationRepaint: {
		if (_gifPreview && !_gifPreview->currentDisplayed()) {
			update();
		}
	} break;
	}
}

void SendFilesBox::prepareDocumentLayout() {
	auto filepath = _files.front();
	if (filepath.isEmpty()) {
		auto filename = filedialogDefaultName(qsl("image"), qsl(".png"), QString(), true);
		_nameText.setText(st::semiboldTextStyle, filename, _textNameOptions);
		_statusText = qsl("%1x%2").arg(_image.width()).arg(_image.height());
		_statusWidth = qMax(_nameText.maxWidth(), st::normalFont->width(_statusText));
		_fileIsImage = true;
	} else {
		auto fileinfo = QFileInfo(filepath);
		auto filename = fileinfo.fileName();
		_fileIsImage = fileIsImage(filename, mimeTypeForFile(fileinfo).name());

		auto songTitle = QString();
		auto songPerformer = QString();
		if (_information) {
			if (auto song = base::get_if<FileLoadTask::Song>(&_information->media)) {
				songTitle = song->title;
				songPerformer = song->performer;
				_fileIsAudio = true;
			}
		}

		auto nameString = DocumentData::composeNameString(filename, songTitle, songPerformer);
		_nameText.setText(st::semiboldTextStyle, nameString, _textNameOptions);
		_statusText = formatSizeText(fileinfo.size());
		_statusWidth = qMax(_nameText.maxWidth(), st::normalFont->width(_statusText));
	}
}

void SendFilesBox::tryToReadSingleFile() {
	auto filepath = _files.front();
	auto filemime = mimeTypeForFile(QFileInfo(filepath)).name();
	_information = FileLoadTask::ReadMediaInformation(_files.front(), QByteArray(), filemime);
	if (auto image = base::get_if<FileLoadTask::Image>(&_information->media)) {
		_image = image->data;
		_animated = image->animated;
	} else if (auto video = base::get_if<FileLoadTask::Video>(&_information->media)) {
		_image = video->thumbnail;
		_animated = true;
	}
}

SendFilesBox::SendFilesBox(QWidget*, const QString &phone, const QString &firstname, const QString &lastname)
: _contactPhone(phone)
, _contactFirstName(firstname)
, _contactLastName(lastname) {
	auto name = lng_full_name(lt_first_name, _contactFirstName, lt_last_name, _contactLastName);
	_nameText.setText(st::semiboldTextStyle, name, _textNameOptions);
	_statusText = _contactPhone;
	_statusWidth = qMax(_nameText.maxWidth(), st::normalFont->width(_statusText));
	_contactPhotoEmpty.set(0, name);
}

void SendFilesBox::prepare() {
	if (_files.size() > 1) {
		updateTitleText();
	}

	_send = addButton(lang(lng_send_button), [this] { onSend(); });
	addButton(lang(lng_cancel), [this] { closeBox(); });

	if (_compressConfirm != CompressConfirm::None) {
		auto compressed = (_compressConfirm == CompressConfirm::Auto) ? cCompressPastedImage() : (_compressConfirm == CompressConfirm::Yes);
		auto text = lng_send_images_compress(lt_count, _files.size());
		_compressed.create(this, text, compressed, st::defaultBoxCheckbox);
		connect(_compressed, SIGNAL(changed()), this, SLOT(onCompressedChange()));
	}
	if (_caption) {
		_caption->setMaxLength(MaxPhotoCaption);
		_caption->setCtrlEnterSubmit(Ui::CtrlEnterSubmit::Both);
		connect(_caption, SIGNAL(resized()), this, SLOT(onCaptionResized()));
		connect(_caption, SIGNAL(submitted(bool)), this, SLOT(onSend(bool)));
		connect(_caption, SIGNAL(cancelled()), this, SLOT(onClose()));
	}
	_send->setText(getSendButtonText());
	updateButtonsGeometry();
	updateBoxSize();
}

QString SendFilesBox::getSendButtonText() const {
	if (!_contactPhone.isEmpty()) {
		return lang(lng_send_button);
	} else if (_compressed && _compressed->checked()) {
		return lng_send_photos(lt_count, _files.size());
	}
	return lng_send_files(lt_count, _files.size());
}

void SendFilesBox::onCompressedChange() {
	setInnerFocus();
	_send->setText(getSendButtonText());
	updateButtonsGeometry();
	updateControlsGeometry();
}

void SendFilesBox::onCaptionResized() {
	updateBoxSize();
	updateControlsGeometry();
	update();
}

void SendFilesBox::updateTitleText() {
	_titleText = (_compressConfirm == CompressConfirm::None) ? lng_send_files_selected(lt_count, _files.size()) : lng_send_images_selected(lt_count, _files.size());
	update();
}

void SendFilesBox::updateBoxSize() {
	auto newHeight = _titleText.isEmpty() ? 0 : st::boxTitleHeight;
	if (!_preview.isNull()) {
		newHeight += st::boxPhotoPadding.top() + _previewHeight;
	} else if (!_fileThumb.isNull()) {
		newHeight += st::boxPhotoPadding.top() + st::msgFileThumbPadding.top() + st::msgFileThumbSize + st::msgFileThumbPadding.bottom();
	} else if (_files.size() > 1) {
		newHeight += 0;
	} else {
		newHeight += st::boxPhotoPadding.top() + st::msgFilePadding.top() + st::msgFileSize + st::msgFilePadding.bottom();
	}
	if (_compressed) {
		newHeight += st::boxPhotoCompressedSkip + _compressed->heightNoMargins();
	}
	if (_caption) {
		newHeight += st::boxPhotoCaptionSkip + _caption->height();
	}
	setDimensions(st::boxWideWidth, newHeight);
}

void SendFilesBox::keyPressEvent(QKeyEvent *e) {
	if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return) {
		onSend((e->modifiers().testFlag(Qt::ControlModifier) || e->modifiers().testFlag(Qt::MetaModifier)) && e->modifiers().testFlag(Qt::ShiftModifier));
	} else {
		BoxContent::keyPressEvent(e);
	}
}

void SendFilesBox::paintEvent(QPaintEvent *e) {
	BoxContent::paintEvent(e);

	Painter p(this);

	if (!_titleText.isEmpty()) {
		p.setFont(st::boxPhotoTitleFont);
		p.setPen(st::boxTitleFg);
		p.drawTextLeft(st::boxPhotoTitlePosition.x(), st::boxPhotoTitlePosition.y(), width(), _titleText);
	}

	if (!_preview.isNull()) {
		if (_previewLeft > st::boxPhotoPadding.left()) {
			p.fillRect(st::boxPhotoPadding.left(), st::boxPhotoPadding.top(), _previewLeft - st::boxPhotoPadding.left(), _previewHeight, st::confirmBg);
		}
		if (_previewLeft + _previewWidth < width() - st::boxPhotoPadding.right()) {
			p.fillRect(_previewLeft + _previewWidth, st::boxPhotoPadding.top(), width() - st::boxPhotoPadding.right() - _previewLeft - _previewWidth, _previewHeight, st::confirmBg);
		}
		if (_gifPreview && _gifPreview->started()) {
			auto s = QSize(_previewWidth, _previewHeight);
			auto paused = App::wnd()->isGifPausedAtLeastFor(Window::GifPauseReason::Layer);
			auto frame = _gifPreview->current(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None, paused ? 0 : getms());
			p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), frame);
		} else {
			p.drawPixmap(_previewLeft, st::boxPhotoPadding.top(), _preview);
		}
		if (_animated && !_gifPreview) {
			auto inner = QRect(_previewLeft + (_previewWidth - st::msgFileSize) / 2, st::boxPhotoPadding.top() + (_previewHeight - st::msgFileSize) / 2, st::msgFileSize, st::msgFileSize);
			p.setPen(Qt::NoPen);
			p.setBrush(st::msgDateImgBg);

			{
				PainterHighQualityEnabler hq(p);
				p.drawEllipse(inner);
			}

			auto icon = &st::historyFileInPlay;
			icon->paintInCenter(p, inner);
		}
	} else if (_files.size() < 2) {
		auto w = width() - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
		auto h = _fileThumb.isNull() ? (st::msgFilePadding.top() + st::msgFileSize + st::msgFilePadding.bottom()) : (st::msgFileThumbPadding.top() + st::msgFileThumbSize + st::msgFileThumbPadding.bottom());
		auto nameleft = 0, nametop = 0, nameright = 0, statustop = 0, linktop = 0;
		if (_fileThumb.isNull()) {
			nameleft = st::msgFilePadding.left() + st::msgFileSize + st::msgFilePadding.right();
			nametop = st::msgFileNameTop;
			nameright = st::msgFilePadding.left();
			statustop = st::msgFileStatusTop;
		} else {
			nameleft = st::msgFileThumbPadding.left() + st::msgFileThumbSize + st::msgFileThumbPadding.right();
			nametop = st::msgFileThumbNameTop;
			nameright = st::msgFileThumbPadding.left();
			statustop = st::msgFileThumbStatusTop;
			linktop = st::msgFileThumbLinkTop;
		}
		auto namewidth = w - nameleft - (_fileThumb.isNull() ? st::msgFilePadding.left() : st::msgFileThumbPadding.left());
		int32 x = (width() - w) / 2, y = st::boxPhotoPadding.top();

		App::roundRect(p, x, y, w, h, st::msgOutBg, MessageOutCorners, &st::msgOutShadow);

		if (_fileThumb.isNull()) {
			if (_contactPhone.isNull()) {
				QRect inner(rtlrect(x + st::msgFilePadding.left(), y + st::msgFilePadding.top(), st::msgFileSize, st::msgFileSize, width()));
				p.setPen(Qt::NoPen);
				p.setBrush(st::msgFileOutBg);

				{
					PainterHighQualityEnabler hq(p);
					p.drawEllipse(inner);
				}

				auto &icon = _fileIsAudio ? st::historyFileOutPlay : _fileIsImage ? st::historyFileOutImage : st::historyFileOutDocument;
				icon.paintInCenter(p, inner);
			} else {
				_contactPhotoEmpty.paint(p, x + st::msgFilePadding.left(), y + st::msgFilePadding.top(), width(), st::msgFileSize);
			}
		} else {
			QRect rthumb(rtlrect(x + st::msgFileThumbPadding.left(), y + st::msgFileThumbPadding.top(), st::msgFileThumbSize, st::msgFileThumbSize, width()));
			p.drawPixmap(rthumb.topLeft(), _fileThumb);
		}
		p.setFont(st::semiboldFont);
		p.setPen(st::historyFileNameOutFg);
		_nameText.drawLeftElided(p, x + nameleft, y + nametop, namewidth, width());

		auto &status = st::mediaOutFg;
		p.setFont(st::normalFont);
		p.setPen(status);
		p.drawTextLeft(x + nameleft, y + statustop, width(), _statusText);
	}
}

void SendFilesBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);
	updateControlsGeometry();
}

void SendFilesBox::updateControlsGeometry() {
	auto bottom = height();
	if (_caption) {
		_caption->resize(st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right(), _caption->height());
		_caption->moveToLeft(st::boxPhotoPadding.left(), bottom - _caption->height());
		bottom -= st::boxPhotoCaptionSkip + _caption->height();
	}
	if (_compressed) {
		_compressed->moveToLeft(st::boxPhotoPadding.left(), bottom - _compressed->heightNoMargins());
		bottom -= st::boxPhotoCompressedSkip + _compressed->heightNoMargins();
	}
}

void SendFilesBox::setInnerFocus() {
	if (!_caption || _caption->isHidden()) {
		setFocus();
	} else {
		_caption->setFocusFast();
	}
}

void SendFilesBox::onSend(bool ctrlShiftEnter) {
	if (_compressed && _compressConfirm == CompressConfirm::Auto && _compressed->checked() != cCompressPastedImage()) {
		cSetCompressPastedImage(_compressed->checked());
		Local::writeUserSettings();
	}
	_confirmed = true;
	if (_confirmedCallback) {
		auto compressed = _compressed ? _compressed->checked() : false;
		auto caption = _caption ? prepareText(_caption->getLastText(), true) : QString();
		_confirmedCallback(_files, _animated ? QImage() : _image, std::move(_information), compressed, caption, ctrlShiftEnter);
	}
	closeBox();
}

void SendFilesBox::closeHook() {
	if (!_confirmed && _cancelledCallback) {
		_cancelledCallback();
	}
}

EditCaptionBox::EditCaptionBox(QWidget*, HistoryItem *msg)
: _msgId(msg->fullId()) {
	QSize dimensions;
	ImagePtr image;
	QString caption;
	DocumentData *doc = nullptr;
	if (auto media = msg->getMedia()) {
		auto t = media->type();
		switch (t) {
		case MediaTypeGif: {
			_animated = true;
			doc = static_cast<HistoryGif*>(media)->getDocument();
			dimensions = doc->dimensions;
			image = doc->thumb;
		} break;

		case MediaTypePhoto: {
			_photo = true;
			PhotoData *photo = static_cast<HistoryPhoto*>(media)->photo();
			dimensions = QSize(photo->full->width(), photo->full->height());
			image = photo->full;
		} break;

		case MediaTypeVideo: {
			_animated = true;
			doc = static_cast<HistoryVideo*>(media)->getDocument();
			dimensions = doc->dimensions;
			image = doc->thumb;
		} break;

		case MediaTypeFile:
		case MediaTypeMusicFile:
		case MediaTypeVoiceFile: {
			_doc = true;
			doc = static_cast<HistoryDocument*>(media)->getDocument();
			image = doc->thumb;
		} break;
		}
		caption = media->getCaption().text;
	}
	if ((!_animated && (dimensions.isEmpty() || doc)) || image->isNull()) {
		_animated = false;
		if (image->isNull()) {
			_thumbw = 0;
		} else {
			int32 tw = image->width(), th = image->height();
			if (tw > th) {
				_thumbw = (tw * st::msgFileThumbSize) / th;
			} else {
				_thumbw = st::msgFileThumbSize;
			}
			auto options = Images::Option::Smooth | Images::Option::RoundedSmall | Images::Option::RoundedTopLeft | Images::Option::RoundedTopRight | Images::Option::RoundedBottomLeft | Images::Option::RoundedBottomRight;
			_thumb = Images::pixmap(image->pix().toImage(), _thumbw * cIntRetinaFactor(), 0, options, st::msgFileThumbSize, st::msgFileThumbSize);
		}

		if (doc) {
			if (doc->voice()) {
				_name.setText(st::semiboldTextStyle, lang(lng_media_audio), _textNameOptions);
			} else {
				_name.setText(st::semiboldTextStyle, doc->composeNameString(), _textNameOptions);
			}
			_status = formatSizeText(doc->size);
			_statusw = qMax(_name.maxWidth(), st::normalFont->width(_status));
			_isImage = doc->isImage();
			_isAudio = (doc->voice() || doc->song());
		}
	} else {
		int32 maxW = 0, maxH = 0;
		if (_animated) {
			int32 limitW = st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
			int32 limitH = st::confirmMaxHeight;
			maxW = qMax(dimensions.width(), 1);
			maxH = qMax(dimensions.height(), 1);
			if (maxW * limitH > maxH * limitW) {
				if (maxW < limitW) {
					maxH = maxH * limitW / maxW;
					maxW = limitW;
				}
			} else {
				if (maxH < limitH) {
					maxW = maxW * limitH / maxH;
					maxH = limitH;
				}
			}
			_thumb = image->pixNoCache(maxW * cIntRetinaFactor(), maxH * cIntRetinaFactor(), Images::Option::Smooth | Images::Option::Blurred, maxW, maxH);
			prepareGifPreview(doc);
		} else {
			maxW = dimensions.width();
			maxH = dimensions.height();
			_thumb = image->pixNoCache(maxW * cIntRetinaFactor(), maxH * cIntRetinaFactor(), Images::Option::Smooth, maxW, maxH);
		}
		int32 tw = _thumb.width(), th = _thumb.height();
		if (!tw || !th) {
			tw = th = 1;
		}
		_thumbw = st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
		if (_thumb.width() < _thumbw) {
			_thumbw = (_thumb.width() > 20) ? _thumb.width() : 20;
		}
		int32 maxthumbh = qMin(qRound(1.5 * _thumbw), int(st::confirmMaxHeight));
		_thumbh = qRound(th * float64(_thumbw) / tw);
		if (_thumbh > maxthumbh) {
			_thumbw = qRound(_thumbw * float64(maxthumbh) / _thumbh);
			_thumbh = maxthumbh;
			if (_thumbw < 10) {
				_thumbw = 10;
			}
		}
		_thumbx = (st::boxWideWidth - _thumbw) / 2;

		_thumb = App::pixmapFromImageInPlace(_thumb.toImage().scaled(_thumbw * cIntRetinaFactor(), _thumbh * cIntRetinaFactor(), Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
		_thumb.setDevicePixelRatio(cRetinaFactor());
	}
	if (_animated || _photo || _doc) {
		_field.create(this, st::confirmCaptionArea, lang(lng_photo_caption), caption);
		_field->setMaxLength(MaxPhotoCaption);
		_field->setCtrlEnterSubmit(Ui::CtrlEnterSubmit::Both);
	} else {
		auto original = msg->originalText();
		auto text = textApplyEntities(original.text, original.entities);
		_field.create(this, st::editTextArea, lang(lng_photo_caption), text);
//		_field->setMaxLength(MaxMessageSize); // entities can make text in input field larger but still valid
		_field->setCtrlEnterSubmit(cCtrlEnter() ? Ui::CtrlEnterSubmit::CtrlEnter : Ui::CtrlEnterSubmit::Enter);
	}
}

void EditCaptionBox::prepareGifPreview(DocumentData *document) {
	auto createGifPreview = [document] {
		return (document && document->isAnimation());
	};
	auto createGifPreviewResult = createGifPreview(); // Clang freeze workaround.
	if (createGifPreviewResult) {
		_gifPreview = Media::Clip::MakeReader(document->location(), document->data(), [this](Media::Clip::Notification notification) {
			clipCallback(notification);
		});
		if (_gifPreview) _gifPreview->setAutoplay();
	}
}

void EditCaptionBox::clipCallback(Media::Clip::Notification notification) {
	using namespace Media::Clip;
	switch (notification) {
	case NotificationReinit: {
		if (_gifPreview && _gifPreview->state() == State::Error) {
			_gifPreview.setBad();
		}

		if (_gifPreview && _gifPreview->ready() && !_gifPreview->started()) {
			auto s = QSize(_thumbw, _thumbh);
			_gifPreview->start(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None);
		}

		update();
	} break;

	case NotificationRepaint: {
		if (_gifPreview && !_gifPreview->currentDisplayed()) {
			update();
		}
	} break;
	}
}

bool EditCaptionBox::canEdit(HistoryItem *message) {
	if (auto media = message->getMedia()) {
		switch (media->type()) {
		case MediaTypeGif:
		case MediaTypePhoto:
		case MediaTypeVideo:
		case MediaTypeFile:
		case MediaTypeMusicFile:
		case MediaTypeVoiceFile: return true;
		}
	}
	return false;
}

void EditCaptionBox::prepare() {
	addButton(lang(lng_settings_save), [this] { onSave(); });
	addButton(lang(lng_cancel), [this] { closeBox(); });

	updateBoxSize();
	connect(_field, SIGNAL(submitted(bool)), this, SLOT(onSave(bool)));
	connect(_field, SIGNAL(cancelled()), this, SLOT(onClose()));
	connect(_field, SIGNAL(resized()), this, SLOT(onCaptionResized()));

	auto cursor = _field->textCursor();
	cursor.movePosition(QTextCursor::End);
	_field->setTextCursor(cursor);
}

void EditCaptionBox::onCaptionResized() {
	updateBoxSize();
	resizeEvent(0);
	update();
}

void EditCaptionBox::updateBoxSize() {
	auto newHeight = st::boxPhotoPadding.top() + st::boxPhotoCaptionSkip + _field->height() + st::normalFont->height;
	if (_photo || _animated) {
		newHeight += _thumbh;
	} else if (_thumbw) {
		newHeight += 0 + st::msgFileThumbSize + 0;
	} else if (_doc) {
		newHeight += 0 + st::msgFileSize + 0;
	} else {
		newHeight += st::boxTitleFont->height;
	}
	setDimensions(st::boxWideWidth, newHeight);
}

void EditCaptionBox::paintEvent(QPaintEvent *e) {
	BoxContent::paintEvent(e);

	Painter p(this);

	if (_photo || _animated) {
		if (_thumbx > st::boxPhotoPadding.left()) {
			p.fillRect(st::boxPhotoPadding.left(), st::boxPhotoPadding.top(), _thumbx - st::boxPhotoPadding.left(), _thumbh, st::confirmBg);
		}
		if (_thumbx + _thumbw < width() - st::boxPhotoPadding.right()) {
			p.fillRect(_thumbx + _thumbw, st::boxPhotoPadding.top(), width() - st::boxPhotoPadding.right() - _thumbx - _thumbw, _thumbh, st::confirmBg);
		}
		if (_gifPreview && _gifPreview->started()) {
			auto s = QSize(_thumbw, _thumbh);
			auto paused = App::wnd()->isGifPausedAtLeastFor(Window::GifPauseReason::Layer);
			auto frame = _gifPreview->current(s.width(), s.height(), s.width(), s.height(), ImageRoundRadius::None, ImageRoundCorner::None, paused ? 0 : getms());
			p.drawPixmap(_thumbx, st::boxPhotoPadding.top(), frame);
		} else {
			p.drawPixmap(_thumbx, st::boxPhotoPadding.top(), _thumb);
		}
		if (_animated && !_gifPreview) {
			QRect inner(_thumbx + (_thumbw - st::msgFileSize) / 2, st::boxPhotoPadding.top() + (_thumbh - st::msgFileSize) / 2, st::msgFileSize, st::msgFileSize);
			p.setPen(Qt::NoPen);
			p.setBrush(st::msgDateImgBg);

			{
				PainterHighQualityEnabler hq(p);
				p.drawEllipse(inner);
			}

			auto icon = &st::historyFileInPlay;
			icon->paintInCenter(p, inner);
		}
	} else if (_doc) {
		int32 w = width() - st::boxPhotoPadding.left() - st::boxPhotoPadding.right();
		int32 h = _thumbw ? (0 + st::msgFileThumbSize + 0) : (0 + st::msgFileSize + 0);
		int32 nameleft = 0, nametop = 0, nameright = 0, statustop = 0;
		if (_thumbw) {
			nameleft = 0 + st::msgFileThumbSize + st::msgFileThumbPadding.right();
			nametop = st::msgFileThumbNameTop - st::msgFileThumbPadding.top();
			nameright = 0;
			statustop = st::msgFileThumbStatusTop - st::msgFileThumbPadding.top();
		} else {
			nameleft = 0 + st::msgFileSize + st::msgFilePadding.right();
			nametop = st::msgFileNameTop - st::msgFilePadding.top();
			nameright = 0;
			statustop = st::msgFileStatusTop - st::msgFilePadding.top();
		}
		int32 namewidth = w - nameleft - 0;
		if (namewidth > _statusw) {
			//w -= (namewidth - _statusw);
			//namewidth = _statusw;
		}
		int32 x = (width() - w) / 2, y = st::boxPhotoPadding.top();

//		App::roundRect(p, x, y, w, h, st::msgInBg, MessageInCorners, &st::msgInShadow);

		if (_thumbw) {
			QRect rthumb(rtlrect(x + 0, y + 0, st::msgFileThumbSize, st::msgFileThumbSize, width()));
			p.drawPixmap(rthumb.topLeft(), _thumb);
		} else {
			QRect inner(rtlrect(x + 0, y + 0, st::msgFileSize, st::msgFileSize, width()));
			p.setPen(Qt::NoPen);
			p.setBrush(st::msgFileInBg);

			{
				PainterHighQualityEnabler hq(p);
				p.drawEllipse(inner);
			}

			auto icon = &(_isAudio ? st::historyFileInPlay : _isImage ? st::historyFileInImage : st::historyFileInDocument);
			icon->paintInCenter(p, inner);
		}
		p.setFont(st::semiboldFont);
		p.setPen(st::historyFileNameInFg);
		_name.drawLeftElided(p, x + nameleft, y + nametop, namewidth, width());

		auto &status = st::mediaInFg;
		p.setFont(st::normalFont);
		p.setPen(status);
		p.drawTextLeft(x + nameleft, y + statustop, width(), _status);
	} else {
		p.setFont(st::boxTitleFont);
		p.setPen(st::boxTextFg);
		p.drawTextLeft(_field->x(), st::boxPhotoPadding.top(), width(), lang(lng_edit_message));
	}

	if (!_error.isEmpty()) {
		p.setFont(st::normalFont);
		p.setPen(st::boxTextFgError);
		p.drawTextLeft(_field->x(), _field->y() + _field->height() + (st::boxButtonPadding.top() / 2), width(), _error);
	}
}

void EditCaptionBox::resizeEvent(QResizeEvent *e) {
	BoxContent::resizeEvent(e);
	_field->resize(st::boxWideWidth - st::boxPhotoPadding.left() - st::boxPhotoPadding.right(), _field->height());
	_field->moveToLeft(st::boxPhotoPadding.left(), height() - st::normalFont->height - _field->height());
}

void EditCaptionBox::setInnerFocus() {
	_field->setFocusFast();
}

void EditCaptionBox::onSave(bool ctrlShiftEnter) {
	if (_saveRequestId) return;

	HistoryItem *item = App::histItemById(_msgId);
	if (!item) {
		_error = lang(lng_edit_deleted);
		update();
		return;
	}

	auto flags = qFlags(MTPmessages_EditMessage::Flag::f_message);
	if (_previewCancelled) {
		flags |= MTPmessages_EditMessage::Flag::f_no_webpage;
	}
	MTPVector<MTPMessageEntity> sentEntities;
	if (!sentEntities.v.isEmpty()) {
		flags |= MTPmessages_EditMessage::Flag::f_entities;
	}
	auto text = prepareText(_field->getLastText(), true);
	_saveRequestId = MTP::send(MTPmessages_EditMessage(MTP_flags(flags), item->history()->peer->input, MTP_int(item->id), MTP_string(text), MTPnullMarkup, sentEntities), rpcDone(&EditCaptionBox::saveDone), rpcFail(&EditCaptionBox::saveFail));
}

void EditCaptionBox::saveDone(const MTPUpdates &updates) {
	_saveRequestId = 0;
	closeBox();
	if (App::main()) {
		App::main()->sentUpdatesReceived(updates);
	}
}

bool EditCaptionBox::saveFail(const RPCError &error) {
	if (MTP::isDefaultHandledError(error)) return false;

	_saveRequestId = 0;
	QString err = error.type();
	if (err == qstr("MESSAGE_ID_INVALID") || err == qstr("CHAT_ADMIN_REQUIRED") || err == qstr("MESSAGE_EDIT_TIME_EXPIRED")) {
		_error = lang(lng_edit_error);
	} else if (err == qstr("MESSAGE_NOT_MODIFIED")) {
		closeBox();
		return true;
	} else if (err == qstr("MESSAGE_EMPTY")) {
		_field->setFocus();
		_field->showError();
	} else {
		_error = lang(lng_edit_error);
	}
	update();
	return true;
}