#pragma once

#include <memory>
#include <string>
#include <vector>

#include "Action.h"
#include "Directory.h"
#include "TextFile.h"

/**
 * @class FileSystem
 * Singleton that manages the file system operations and executions.
 */
class FileSystem {
    std::vector<std::string> history;
    std::unique_ptr<Directory> root;

    FileSystem();

    FileSystem(const FileSystem&) = delete;
    FileSystem& operator=(const FileSystem&) = delete;

    // handlers to handle the different types of actions
    std::unique_ptr<Action> handleHelp(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleCreate(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleDelete(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleList(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleRead(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleWrite(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleSearch(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleImport(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleExport(const std::vector<std::string>& args) const;
    std::unique_ptr<Action> handleHistory(const std::vector<std::string>& args) const;

    // helper functions for the handlers
    enum ActionType { HELP, CREATE, DELETE, LIST, READ, WRITE, SEARCH, IMPORT, EXPORT, HISTORY };
    static void checkAmountOfArgs(ActionType action, unsigned int num, const std::string& type = "");
    Directory& getDirectoryFromPath(const std::vector<std::string>& pathVector,
        const std::string& errorMessage) const;
    TextFile& getTextFileFromPath(const std::vector<std::string>& pathVector) const;

public:
    ~FileSystem() = default;

    /**
     * @return The instance of the FileSystem used by the program.
     */
    static FileSystem& getInstance();

    /**
     * Runs the file system cli.
     */
    void run();
};