#include <iostream>
#include <string>
#include <random>
#include <vector>
#include <windows.h>

using std::string;
using std::cout;
using std::endl;
using std::cin;

int main()
{
    constexpr auto max = 10u;
    const std::vector<string> words = {"agrest", "bigos", "czara", "drewno", "ekipa", "figura", "gorycz", "hiena", "iskra", "junior"};
    std::mt19937 eng(std::random_device{}());
    std::uniform_int_distribution<> dis(0u, max-1);
    char play;
    cout << "Witaj w grze wisielec!" << endl;
    do
    {
        string target = words[dis(eng)];
        int len = target.length();
        string attempt(len,'-');
        string badchars;
        int guesses = 6;
        cout << "Slowo ma " << len << " liter." << endl;
        cout << "Mozesz pomylic sie " << guesses << " razy." << endl;
        cout << "POWODZENIA :)" << endl;
        cout << endl;
        while (guesses > 0 && attempt != target)
        {
            cout << "Twoje slowo: " << attempt << endl;
            if (badchars.length() > 0)
            {
                cout << "Niepoprawne litery: " << badchars << endl;
            }
            cout << "Mozesz pomylic sie jeszcze " << guesses << " razy" << endl;
            char letter;
            cout << "Podaj litere: ";
            cin >> letter;

            // system dependent
            system("cls");

            if (badchars.find(letter) != string::npos ||
                attempt.find(letter) != string::npos)
            {
                cout << "Ta litera juz byla. Sproboj innej." << endl;
                continue;
            }

            int pos = target.find(letter);
            if (pos == string::npos)
            {
                cout << "Nie ma takiej litery!" << endl;
                guesses--;
                badchars += letter;
            }
            else
            {
                cout << "Poprawna litera" << endl;
                do
                {
                    attempt[pos] = letter;
                    pos = target.find(letter, pos+1);
                } while(pos != string::npos);
            }
        }
        if (guesses > 0)
            cout << "To juz cale slowo! Brawo!" << endl;
        else
            cout << "Niestety, to slowo to " << target << endl;
        cout << "Chcesz zagrac jeszcze raz? (t/n)" << endl;
        cin >> play;
    } while (tolower(play)=='t');
    return 0;
}