/*
	Copyright 2006-2026 The QElectroTech Team
	This file is part of QElectroTech.

	QElectroTech 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 2 of the License, or
	(at your option) any later version.

	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "qetsettings.h"
#include <QSettings>
#include <QVariant>
#include <QByteArray>

namespace QetSettings
{
	/**
	* @brief setHdpiScaleFactorRoundingPolicy
	* Write the value of HdpiScaleFactorRoundingPolicy in
	* QElectroTech settings
	* the value is in form of a string.
	* @a policy can be : Round, Ceil, Floor, RoundPreferFloor, PassThrough
	* In case of wrong policy, PassThrough is use as default value.
	* The value is stored with key : hdpi_scale_factor_rounding_policy
	* @sa Qt::HighDpiScaleFactorRoundingPolicy
	* @param policy
	*/
	void setHdpiScaleFactorRoundingPolicy(const QString &policy_str)
	{
		auto policy = QString("PassThrough");
		if (policy_str == QLatin1String("Round")) {
			policy = "Round";
		} else if (policy_str == QLatin1String("Ceil")) {
			policy = "Ceil";
		} else if (policy_str == QLatin1String("Floor")) {
			policy = "Floor";
		} else if (policy_str == QLatin1String("RoundPreferFloor")) {
			policy = "RoundPreferFloor";
		}
		QSettings settings;
		settings.setValue("hdpi_scale_factor_rounding_policy", policy);
	}

	/**
	* @brief setHdpiScaleFactorRoundingPolicy
	* Overload function
	* @sa void setHdpiScaleFactorRoundingPolicy(const QString &policy_str)
	* @param policy
	*/
	void setHdpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy policy)
	{
		QString policy_str;
		switch (policy) {
			case Qt::HighDpiScaleFactorRoundingPolicy::Round:
				policy_str = "Round";
				break;
			case Qt::HighDpiScaleFactorRoundingPolicy::Ceil:
				policy_str = "Ceil";
				break;
			case Qt::HighDpiScaleFactorRoundingPolicy::Floor:
				policy_str = "Floor";
				break;
			case Qt::HighDpiScaleFactorRoundingPolicy::RoundPreferFloor:
				policy_str = "RoundPreferFloor";
				break;
			default:
				policy_str = "PassThrough";
				break;
		}

		QSettings settings;
		settings.setValue("hdpi_scale_factor_rounding_policy", policy_str);
	}

	/**
	* @brief hdpiScaleFactorRoundingPolicy
	* @param default_policy
	* @return the hdpiScaleFactorRoundingPolicy value stored in current settings.
	* @sa setHdpiScaleFactorRoundingPolicy
	*/
	Qt::HighDpiScaleFactorRoundingPolicy hdpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy default_policy)
	{
		QSettings settings;
		auto value_ = settings.value("hdpi_scale_factor_rounding_policy");

		if (value_ == QLatin1String("Round")) {
			return Qt::HighDpiScaleFactorRoundingPolicy::Round;
		} else if (value_ == QLatin1String("Ceil")) {
			return Qt::HighDpiScaleFactorRoundingPolicy::Ceil;
		} else if (value_ == QLatin1String("Floor")) {
			return Qt::HighDpiScaleFactorRoundingPolicy::Floor;
		} else if (value_ == QLatin1String("RoundPreferFloor")) {
			return Qt::HighDpiScaleFactorRoundingPolicy::RoundPreferFloor;
		} else if (value_ == QLatin1String("PassThrough")) {
			return Qt::HighDpiScaleFactorRoundingPolicy::PassThrough;
		} else {
			return default_policy;
		}
	}

	/**
	* @brief scriptingForcedByEnvironment
	* @return true if QET_ENABLE_SCRIPTING is set to 1 in the environment.
	*
	* The way to turn scripting on where there is nobody to tick a box:
	* a headless run, a CI job, a build server. Those have no settings
	* file worth writing to -- and on a machine whose HOME is created
	* fresh for the run, writing one would not survive anyway.
	*/
	bool scriptingForcedByEnvironment()
	{
		return qgetenv("QET_ENABLE_SCRIPTING") == QByteArray("1");
	}

	/**
	* @brief scriptingEnabled
	* @return whether QElectroTech may run a JavaScript script.
	*
	* Off unless the user turned it on. A script reaches the whole project
	* and the filesystem through the export calls, so it is capability the
	* great majority of users never asked for; leaving it on by default
	* would hand it to them anyway. @sa setScriptingEnabled
	*
	* The environment override wins over the stored value, and is checked
	* first so that a machine with no settings at all still answers.
	*/
	bool scriptingEnabled()
	{
		if (scriptingForcedByEnvironment()) {
			return true;
		}
		QSettings settings;
		return settings.value("scripting/enabled", false).toBool();
	}

	/**
	* @brief setScriptingEnabled
	* Store whether scripting is allowed. @sa scriptingEnabled
	* @param enabled
	*/
	void setScriptingEnabled(bool enabled)
	{
		QSettings settings;
		settings.setValue("scripting/enabled", enabled);
	}

	/**
	* @brief setSheetBackground
	* Store the sheet background last picked in the diagram editor, so the
	* next start opens on it for every project, old or new. @sa sheetBackground
	* @param background
	*/
	void setSheetBackground(const SheetBackground &background)
	{
		QSettings settings;
		//HexRgb, not HexArgb, on purpose: Diagram::background_color is
		//temporarily given an alpha of 0 by the SVG export to make the
		//background transparent, and that transient value must never end
		//up here as a stored transparent sheet.
		settings.setValue(QStringLiteral("diagrameditor/sheet_background_color"),
				  background.color.name(QColor::HexRgb));
		settings.setValue(QStringLiteral("diagrameditor/sheet_background_custom"),
				  background.custom);
	}

	/**
	* @brief sheetBackground
	* @return the sheet background stored by setSheetBackground(), or the
	* built-in default (white, following the system) when there is none.
	* @sa setSheetBackground
	*/
	SheetBackground sheetBackground()
	{
		QSettings settings;
		SheetBackground background;
		background.custom = settings.value(
				QStringLiteral("diagrameditor/sheet_background_custom"),
				false).toBool();
		const QColor stored(settings.value(
				QStringLiteral("diagrameditor/sheet_background_color"),
				QStringLiteral("#ffffff")).toString());
		background.color = stored.isValid() ? stored : QColor(Qt::white);
		return background;
	}

	/**
	* @brief sheetBackgroundRecentColors
	* @return the "recently used" sheet background colours, most recent
	* first. Empty until the user has picked a non-preset colour.
	* @sa setSheetBackgroundRecentColors
	*/
	QStringList sheetBackgroundRecentColors()
	{
		QSettings settings;
		return settings.value(QStringLiteral("diagrameditor/sheet_background_recent")).toStringList();
	}

	/**
	* @brief setSheetBackgroundRecentColors
	* Store the "recently used" sheet background colours, most recent first.
	* @sa sheetBackgroundRecentColors
	* @param colors
	*/
	void setSheetBackgroundRecentColors(const QStringList &colors)
	{
		QSettings settings;
		settings.setValue(QStringLiteral("diagrameditor/sheet_background_recent"), colors);
	}
}