#ifndef SHELL_H
#define SHELL_H
#include <iostream>
#include <sys/wait.h>
#include <unistd.h>
#include <cstdlib>
#include <sstream>
#include <string>
#include <cstring>
#include <vector>
#include <csignal>
#include "command.h"
using std::string;
using std::cin;
using std::cout;
using std::cerr;
using std::string;
using std::vector;
using std::istringstream;
using std::nullptr_t;

class Shell
{
    class Commands
    {
        vector<Command*> commands;
        static bool created;
        Commands(Commands&);
    public:
        Commands();
        void add(Command*);
        size_t howMany();
        int launch(const vector<string>* args);
    };

    static bool undoingLine;
    Commands cmds;
    string ps;
    string name;
    void (*shellSetup)(Shell *);
    bool notLoop;

    int launch(vector<string>* args);
    int execute(vector<string>* args);
    static void EofHandler(int);
    string* read_line();
    vector<string>* split_line(string* line);

    class IsUndoingLineException {};

public:
    Shell( string n="msh", string ps="MSH$",void (*s)(Shell*)=0);
    string getPs() const;
    void setPs(const string &value);
    string getName() const;
    void setName(const string &value);
    void launch();

    //for in-shell commands
    void addCmd(Command *cmd);
    size_t howManyCmds();

    //exceptions
    class CommandsAlreadyCreatedException{};
    class CommandNotFoundException{};
    class ShellLaunchInSetupException{};
};

#endif // SHELL_H