#pragma once

#include <iostream>
#include <string>
#include <map>
#include <cstdlib>
#include <filesystem>
#include <vector>
#include <optional>

namespace sh
{
    enum class Command
    {
        exit,
        echo,
        type,
        pwd,
        cd,
        unknown
    };


    inline const std::map<const std::string_view, const Command>commandMap
    {
        {"exit", Command::exit},
        {"echo", Command::echo},
        {"type", Command::type},
        {"pwd" , Command::pwd },
        {"cd"  , Command::cd  }
    };

    inline constexpr std::string_view doubleQuoteEscapeChars = "\"$`\n\\";

    inline constexpr std::string_view tokenDelimiters = " \t";

    void tokenize(std::vector<std::string>& tokens, const std::string& input);

    Command getCommand(std::string_view input);

    std::optional<std::filesystem::path> isExec(const std::string& input);

    void printType(const std::string& input, const std::optional<std::filesystem::path>& stdoutFilePath = std::nullopt);

    std::filesystem::path getWorkingDir();

    void changeDir(const std::vector<std::string>& tokens, const std::optional<std::filesystem::path>& stdoutFilePath = std::nullopt);

    void printCommandStdout(std::string_view input, const std::optional<std::filesystem::path>& outputFilePath = std::nullopt, bool append = false);

    void printCommandStderr(std::string_view input, const std::optional<std::filesystem::path>& outputFilePath = std::nullopt, bool append = false);

    void executeCommand(const std::filesystem::path& exePath, const std::vector<std::string>& tokens, const std::optional<std::filesystem::path>& stdoutFilePath = std::nullopt, const std::optional<std::filesystem::path>& stderrFilePath = std::nullopt, bool appendStdout = false, bool appendStderr = false);
}