#pragma once
#include <QDir>
#include <QMap>


namespace rvfs {

/**
 * Represent a virtual restricted file system.
 * Real directory can be mounted to safely interact with the real file system.
 */
class RestrictedVirtualFileSystem {

public:
    explicit RestrictedVirtualFileSystem();

    /**
     * Get all the mounted directories with their path in the virtual file system and in the real file system
     * @return all the mounted directories with their path in the virtual file system and in the real file system
     */
    QMap<QString, QString> getMountedDirectories();

    /**
     * Mount a real directory into the virtual file system
     * @param destination the path to the directory in the virtual file system
     * @param source the path to the directory in the real file system
     */
    void mountDirectory(const QDir& destination, const QDir& source);

    /**
     * Unmount a directory from the virtual file system
     * @param destination the path to the directory in the virtual file system
     */
    void unmountDirectory(const QDir& destination);

    /**
     * Get the current working directory in the virtual file system
     * @return the current working directory in the virtual file system
     */
    QDir getWorkingDirectory();
    /**
     * Change the current working directory in the virtual file system
     * @param path path to the new virtual working directory
     */
    void setWorkingDirectory(const QDir& path);

    /**
     * Resolve a path inside the virtual file system into a path in the real file system
     * @param path the path in the virtual file system
     * @return the matching path in the real file system
     */
    QString resolvePath(QString path);

private:
    /// the current working directory
    QDir workingDirectory;
    /// store the path in the virtual file system of a directory in the real file system
    QMap<QString, QString> mounts;

};

}