#include <cstdlib>
#include <fstream>
#include <string>
#include <iostream>

using namespace std;

int main(int argc, char *argv[])
{
    string rig;
    string typed;
    string user;
    string pass;
    beginning:
    rig = "computer";
    cout << "Welcome to Danny's Shell (danshell)\n";
    cout << "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n";
    userprompt:
    cout << "Username: ";
    cin >> user;

    if( (user == "nerd") || (user == "mummy") || (user == "weirdo") )
    {
        goto passprompt;
    }
    else
    {
        cout << "Invalid username.\n";
        goto userprompt;
    }
    passprompt:
    cout << "Password: ";
    cin >> pass;
    if( (user == "nerd") && (pass == "rakshasa") )
    {
        cout << "Welcome " << user << ".\n";
        goto prompt;
    }
    if( (user == "mummy") && (pass == "mummy") )
    {
        cout << "Hi Mummy!\n";
        goto prompt;
    }
    if( (user == "weirdo") && (pass == "sockysocks") )
    {
        cout << "Hi Sarah!\n";
        goto prompt;
    }
    else
    {
        cout << "Incorrect password.\n";
        goto userprompt;
    }
    prompt:
    cout << user << "@" << rig << "$> ";
    cin >> typed;
    if(typed == "computername")
    {
         cout << "Enter new name for your computer: ";
         cin >> rig;
         cout << "Your computer is now called " << rig << ".\n";
         goto prompt;
    }
    else if(typed == "exit")
    {
         cout << "Have a good day, " << user << ".";
         cout << "\n";
         goto kill;
    }
    else if(typed == "hello")
    {
        cout << "Hello to you too!\n";
        goto prompt;
    }
    else if(typed == "logme")
    {
        ofstream userLog("C:\\Dev-Cpp\\Terminal1\\userlog.txt", ios::app);
        if (! userLog)
        {
              cout << "ERROR!!! ERROR!!!\n";
              goto prompt;
        }
        userLog << user << endl;
        userLog.close();
        cout << "Your username has been successfully logged.\n";
        goto prompt;
    }
    else if(typed == "logout")
    {
         user = "";
         pass = "";
         goto userprompt;
    }
    else if(typed == "microsoft")
    {
         cout << "DON'T SAY THAT!!!\n";
         goto prompt;
    }
    else if(typed == "user")
    {
         cout << user << "is currently logged on.\n";
         goto prompt;
    }
    else if(typed == "yo")
    {
         cout << "Yo sup dude?\n";
         goto prompt;
    }

    else if(typed == "help")
    {
         cout << "List of currently implemented commands:\n";
         cout << "computername exit hello logme logout microsoft user yo\n";
         goto prompt;
    }
    else
    {
        cout << "Sorry, the " << typed << " command has not yet been implemented.\n";
        goto prompt;
    }
    kill:
    system("PAUSE");
    return EXIT_SUCCESS;
}