using namespace std;

vector<string> split_string_lol(const string& s, char delimiter) {
    vector<string> tokens;
    size_t start = 0, end = 0;
    while ((end = s.find(delimiter, start)) != string::npos) {
        tokens.push_back(s.substr(start, end - start));
        start = end + 1;
    }
    tokens.push_back(s.substr(start));
    return tokens;
}

void add(string questions_arr[], int size, string login) {
    ifstream file;
    file.open("estimation/progress.txt");

    int all_lines = 0;
    if (file.is_open()) {
        ofstream temp_file;
        temp_file.open("estimation/progress_temp.txt", std::ios::app);
        string questions_to_replace = "";
        if (temp_file.is_open()) {
            string line;
            while (getline(file, line)) {
                all_lines++;
                if (login == line) {
                    temp_file << line << '\n';
                    string questions;
                    getline(file, questions);
                    cout << "q to replace " << questions << endl;
                    questions_to_replace = questions;
                    string new_questions = "";
                    for (int i = 0; i < size; i++) {
                        questions = questions + "@" + questions_arr[i];
                    }
                    temp_file << questions << '\n';
                }
                else {
                    temp_file << line << '\n';
                }
            }


            file.close();

            ofstream file2("estimation/progress.txt", ofstream::trunc);
            file2.close();

            ofstream origfile("estimation/progress.txt", std::ios::app);

            temp_file.close();
            ifstream temp_file_r("estimation/progress_temp.txt");
            string temp_line;

            int curr_line = 0;
            while (getline(temp_file_r, temp_line)) {
                if (curr_line == all_lines) {
                    cout << "-2 line is " << temp_line;
                    origfile << temp_line;
                }
                else {
                    origfile << temp_line << '\n';
                }
                curr_line++;
            }

            temp_file.close();
            temp_file.open("estimation/progress_temp.txt", ofstream::trunc);
            temp_file_r.close();
            origfile.close();
        }

    }
    else {
        std::cout << "Unable to open file.\n";
    }



}

string login = "loginnewone356";

    ifstream file("estimation/progress.txt");
    string str;
    int curr = 0;
    bool user_was_not_found = true;
    while (getline(file, str)) {
        if (login == str) {
            user_was_not_found = false;
            string ques;
            getline(file, ques);

            if (ques == "") {
                cout << "Questions for " << login << " are empty" << endl;
            }
            else {
                cout << "Questions for " << login << endl;
                vector<string> qs = split_string_lol(ques, '@');

                for (const string& q : qs) {
                    if (q != "") {
                        cout << "q is " << q << endl;
                    }
                }

            }
        }
        curr += 2;
    }

    if (user_was_not_found) {
        std::ofstream outfile;
        outfile.open("estimation/progress.txt", std::ios::app); // open file in append mode

        if (outfile.is_open()) {
            outfile << "\n";
            outfile << login << "\n";
            outfile.close();
        }
        else {
            std::cout << "Unable to open file.\n";
        }
    }

    string questions[3];
    questions[0] = "addresses:5";
    questions[1] = "addresses:7";
    questions[2] = "addresses:35";
    add(questions, 3, login);