// Copyright 2021 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.

#ifndef MUMBLE_MUMBLE_PLUGININSTALLER_H_
#define MUMBLE_MUMBLE_PLUGININSTALLER_H_


#include <QtCore/QException>
#include <QtCore/QFileInfo>

#include "Plugin.h"

#include "ui_PluginInstaller.h"

/// An exception thrown by the PluginInstaller
class PluginInstallException : public QException {
protected:
	/// The exception's message
	QString m_msg;

public:
	/// @param msg The message stating why this exception has been thrown
	PluginInstallException(const QString &msg);

	/// @returns This exception's message
	QString getMessage() const;
};

/// The PluginInstaller can be used to install plugins into Mumble. It verifies that the respective
/// plugin is functional and will automatiacally copy/move the plugin library to the respective
/// directory on the FileSystem.
class PluginInstaller : public QDialog, public Ui::PluginInstaller {
private:
	Q_OBJECT;
	Q_DISABLE_COPY(PluginInstaller);

protected:
	/// The file the installer has been invoked on
	QFileInfo m_pluginArchive;
	/// A pointer to the plugin instance created from the plugin library that shall be installed
	Plugin *m_plugin;
	/// The actual plugin library file
	QFileInfo m_pluginSource;
	/// The destinaton file to which the plugin library shall be copied
	QFileInfo m_pluginDestination;
	/// A flag indicating that the plugin library shall be copied instead of moved in order
	/// to install it.
	bool m_copyPlugin;

	/// Initializes this installer by processing the provided plugin source and filling all
	/// internal fields. This function is called from the constructor.
	///
	/// @throws PluginInstallException If something isn't right or goes wrong
	void init();

public:
	/// The "special" file-extension associated with Mumble plugins
	static const QString pluginFileExtension;

	/// A helper function checking whether the provided file could be a plugin source
	///
	/// @param fileInfo The file to check
	/// @returns Whether the provided file could (!) be a plugin source
	static bool canBePluginFile(const QFileInfo &fileInfo) noexcept;

	/// @param fileInfo The plugin source to process
	///
	/// @throws PluginInstallException If something isn't right or goes wrong
	PluginInstaller(const QFileInfo &fileInfo, QWidget *p = nullptr);
	/// Destructor
	~PluginInstaller();

	/// Performs the actual installation (moving/copying of the library) of the plugin
	void install() const;

	static QString getInstallDir();

public slots:
	/// Slot called when the user clicks the yes button
	void on_qpbYesClicked();
	/// Slot called when the user clicks the no button
	void on_qpbNoClicked();
};

#endif // MUMBLE_MUMBLE_PLUGININSTALLER_H_