/*
 * Olive Community Edition - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * This program 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.
 *
 * This program 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "projectproperties.h"

#include <QButtonGroup>
#include <QDialogButtonBox>
#include <QFileDialog>
#include <QGroupBox>
#include <QLabel>
#include <QMessageBox>
#include <QPushButton>

#include "common/filefunctions.h"
#include "node/color/colormanager/colormanager.h"
#include "render/diskmanager.h"

namespace olive
{

#define super QDialog

ProjectPropertiesDialog::ProjectPropertiesDialog(Project *p, QWidget *parent)
	: super(parent)
	, working_project_(p)
	, ocio_config_is_valid_(true)
{
	QVBoxLayout *layout = new QVBoxLayout(this);

	setWindowTitle(
		tr("Project Properties for '%1'").arg(working_project_->name()));

	QTabWidget *tabs = new QTabWidget;
	layout->addWidget(tabs);

	{
		// Color management group
		QWidget *color_group = new QWidget();

		QVBoxLayout *color_outer_layout = new QVBoxLayout(color_group);

		QGridLayout *color_layout = new QGridLayout();
		color_outer_layout->addLayout(color_layout);

		int row = 0;

		color_layout->addWidget(new QLabel(tr("OpenColorIO Configuration:")),
								row, 0);

		ocio_filename_ = new QLineEdit();
		ocio_filename_->setPlaceholderText(tr("(default)"));
		color_layout->addWidget(ocio_filename_, row, 1);

		row++;

		color_layout->addWidget(new QLabel(tr("Default Input Color Space:")),
								row, 0);

		default_input_colorspace_ = new QComboBox();
		color_layout->addWidget(default_input_colorspace_, row, 1, 1, 2);

		row++;

		color_layout->addWidget(new QLabel(tr("Reference Space:")), row, 0);

		reference_space_ = new QComboBox(this);
		reference_space_->addItem(tr("Scene Linear"), OCIO::ROLE_SCENE_LINEAR);
		reference_space_->addItem(tr("Compositing Log"),
								  OCIO::ROLE_COMPOSITING_LOG);
		QtUtils::SetComboBoxData(reference_space_, p->GetColorReferenceSpace());
		color_layout->addWidget(reference_space_, row, 1, 1, 2);

		row++;

		QPushButton *browse_btn = new QPushButton(tr("Browse"));
		color_layout->addWidget(browse_btn, 0, 2);
		connect(browse_btn, &QPushButton::clicked, this,
				&ProjectPropertiesDialog::BrowseForOCIOConfig);

		ocio_filename_->setText(
			working_project_->color_manager()->GetConfigFilename());

		connect(ocio_filename_, &QLineEdit::textChanged, this,
				&ProjectPropertiesDialog::OCIOFilenameUpdated);
		OCIOFilenameUpdated();

		tabs->addTab(color_group, tr("Color Management"));

		color_outer_layout->addStretch();
	}

	{
		// Cache group
		QWidget *cache_group = new QWidget();

		QVBoxLayout *cache_layout = new QVBoxLayout(cache_group);

		QButtonGroup *disk_cache_btn_group = new QButtonGroup();

		// Create radio buttons and add to widget and button group
		disk_cache_radios_[Project::kCacheUseDefaultLocation] =
			new QRadioButton(tr("Use Default Location"));
		disk_cache_radios_[Project::kCacheStoreAlongsideProject] =
			new QRadioButton(tr("Store Alongside Project"));
		disk_cache_radios_[Project::kCacheCustomPath] =
			new QRadioButton(tr("Use Custom Location:"));
		for (int i = 0; i < kDiskCacheRadioCount; i++) {
			disk_cache_btn_group->addButton(disk_cache_radios_[i]);
			cache_layout->addWidget(disk_cache_radios_[i]);
		}

		// Create custom cache path widget
		custom_cache_path_ =
			new PathWidget(working_project_->GetCustomCachePath(), this);
		custom_cache_path_->setEnabled(false);
		cache_layout->addWidget(custom_cache_path_);

		// Ensure custom cache path "enabled" is tied to the radio button being checked
		connect(disk_cache_radios_[Project::kCacheCustomPath],
				&QRadioButton::toggled, custom_cache_path_,
				&PathWidget::setEnabled);

		// Check the radio button that should currently be active
		disk_cache_radios_[working_project_->GetCacheLocationSetting()]
			->setChecked(true);

		// Add disk cache settings button
		QPushButton *disk_cache_settings_btn =
			new QPushButton(tr("Disk Cache Settings"));
		connect(disk_cache_settings_btn, &QPushButton::clicked, this,
				&ProjectPropertiesDialog::OpenDiskCacheSettings);
		cache_layout->addWidget(disk_cache_settings_btn);

		tabs->addTab(cache_group, tr("Disk Cache"));
	}

	QDialogButtonBox *dialog_btns = new QDialogButtonBox(
		QDialogButtonBox::Ok | QDialogButtonBox::Cancel, Qt::Horizontal);
	layout->addWidget(dialog_btns);
	connect(dialog_btns, &QDialogButtonBox::accepted, this,
			&ProjectPropertiesDialog::accept);
	connect(dialog_btns, &QDialogButtonBox::rejected, this,
			&ProjectPropertiesDialog::reject);
}

void ProjectPropertiesDialog::accept()
{
	if (!ocio_config_is_valid_) {
		QMessageBox mb(this);
		mb.setWindowModality(Qt::WindowModal);
		mb.setIcon(QMessageBox::Critical);
		mb.setWindowTitle(tr("OpenColorIO Config Error"));
		mb.setText(tr("Failed to set OpenColorIO configuration: %1")
					   .arg(ocio_config_error_));
		mb.addButton(QMessageBox::Ok);
		mb.exec();
		return;
	}

	if (disk_cache_radios_[Project::kCacheUseDefaultLocation]->isChecked()) {
		// Keep new cache path empty, which means default
	} else if (disk_cache_radios_[Project::kCacheStoreAlongsideProject]
				   ->isChecked()) {
		// Ensure alongside project path is valid
		if (!VerifyPathAndWarnIfBad(
				working_project_->get_cache_alongside_project_path())) {
			return;
		}
	} else {
		// Ensure custom path is valid
		if (!VerifyPathAndWarnIfBad(custom_cache_path_->text())) {
			return;
		}
	}

	if (custom_cache_path_->text() != working_project_->GetCustomCachePath()) {
		// Check if the user is okay with invalidating the current cache
		if (!DiskManager::ShowDiskCacheChangeConfirmationDialog(this)) {
			return;
		}

		working_project_->SetCustomCachePath(custom_cache_path_->text());

		emit DiskManager::instance() -> InvalidateProject(working_project_);
	}

	// This should ripple changes throughout the graph/cache that the color config has changed, and
	// therefore should be done after the cache path is changed
	if (working_project_->color_manager()->GetConfigFilename() !=
		ocio_filename_->text()) {
		working_project_->color_manager()->SetConfigFilename(
			ocio_filename_->text());
	}
	if (working_project_->color_manager()->GetDefaultInputColorSpace() !=
		default_input_colorspace_->currentText()) {
		working_project_->color_manager()->SetDefaultInputColorSpace(
			default_input_colorspace_->currentText());
	}
	if (working_project_->GetColorReferenceSpace() !=
		reference_space_->currentData().toString()) {
		working_project_->SetColorReferenceSpace(
			reference_space_->currentData().toString());
	}

	super::accept();
}

bool ProjectPropertiesDialog::VerifyPathAndWarnIfBad(const QString &path)
{
	if (!FileFunctions::DirectoryIsValid(path)) {
		QMessageBox mb(this);
		mb.setWindowModality(Qt::WindowModal);
		mb.setIcon(QMessageBox::Critical);
		mb.setWindowTitle(tr("Invalid path"));
		mb.setText(tr(
			"The custom cache path is invalid. Please check it and try again."));
		mb.addButton(QMessageBox::Ok);
		mb.exec();
		return false;
	}

	return true;
}

void ProjectPropertiesDialog::BrowseForOCIOConfig()
{
	QString fn = QFileDialog::getOpenFileName(
		this, tr("Browse for OpenColorIO configuration"));
	if (!fn.isEmpty()) {
		ocio_filename_->setText(fn);
	}
}

void ProjectPropertiesDialog::OCIOFilenameUpdated()
{
	default_input_colorspace_->clear();

	try {
		OCIO::ConstConfigRcPtr c;

		if (ocio_filename_->text().isEmpty()) {
			c = ColorManager::GetDefaultConfig();
		} else {
			c = ColorManager::CreateConfigFromFile(ocio_filename_->text());
		}

		ocio_filename_->setStyleSheet(QString());
		ocio_config_is_valid_ = true;

		// List input color spaces
		QStringList input_cs = ColorManager::ListAvailableColorspaces(c);

		foreach (QString cs, input_cs) {
			default_input_colorspace_->addItem(cs);

			if (cs ==
				working_project_->color_manager()->GetDefaultInputColorSpace()) {
				default_input_colorspace_->setCurrentIndex(
					default_input_colorspace_->count() - 1);
			}
		}
	} catch (OCIO::Exception &e) {
		ocio_config_is_valid_ = false;
		ocio_filename_->setStyleSheet(
			QStringLiteral("QLineEdit {color: red;}"));
		ocio_config_error_ = e.what();
	}
}

void ProjectPropertiesDialog::OpenDiskCacheSettings()
{
	if (disk_cache_radios_[Project::kCacheUseDefaultLocation]->isChecked()) {
		DiskManager::instance()->ShowDiskCacheSettingsDialog(
			DiskManager::instance()->GetDefaultCacheFolder(), this);
	} else if (disk_cache_radios_[Project::kCacheStoreAlongsideProject]
				   ->isChecked()) {
		DiskManager::instance()->ShowDiskCacheSettingsDialog(
			working_project_->get_cache_alongside_project_path(), this);
	} else {
		DiskManager::instance()->ShowDiskCacheSettingsDialog(
			custom_cache_path_->text(), this);
	}
}

}