#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;

class user
{
    friend class db;
    string username;
    string password;
    string email;
    public:
    user(string u, string p, string e)
    {
        username = u;
        password = p;
        email = e;
    }
    ~user()
    {
    }
};
class db
{
    string dbfilename;
    vector<user> users;
    public:
    ~db()
    {

    }
    int find_user(string u)
    {
        int x = users.size();
        for(int i=0;i<x;i++)
        {
            if(users[i].username == u)
            {
                return i;
            }
        }
        return -1;
    }
    bool add_user(string u, string p, string e)
    {
        if(!u.empty() && !p.empty() && !p.empty() && find_user(u) == -1)
        {
            user NewUsr(u,p,e);
            users.emplace_back(NewUsr);
            users.shrink_to_fit();
            return true;
        }
        return false;
    }
    db(string filename)
    {
        dbfilename=filename;
        fstream file;
        file.open(dbfilename.c_str());
        string cuvant, u, p, e;
        for(int i=0;file>>cuvant;i++)
        {
            u,p,e = "";
            if(i == 0)
            {
                u = cuvant;
            }
            if(i == 1)
            {
                p = cuvant;
            }
            if(i == 2)
            {
                e = cuvant;
                cout << "Reading user: "<< users.size() << "\n" \
                     << "U: " << u << endl \
                     << "P: " << p << endl \
                     << "E: " << e << endl;
                add_user(u,p,e);
                i=-1;
            }
        }
        file.close();
    }
    void print()
    {
        int x = users.size();
        for(int i=0;i<x;i++)
        {
            cout << "[" << i << "]: " \
                 << users[i].username \
                 << " " << users[i].password \
                 << " " << users[i].email << endl;
        }
    }
    bool update()
    {
        fstream file;
        int x = users.size();
        for(int i=0;i<x;i++)
        {
            if(i==0)
            {
                file.open(dbfilename.c_str(), ios::out);
                file << users[i].username << " " << users[i].password << " " << users[i].email << endl;
                file.close();
            }
            else
            {
                file.open(dbfilename.c_str(), ios::out|ios::app);
                file << users[i].username << " " << users[i].password << " " << users[i].email << endl;
                file.close();
            }
        }
        return 0;
    }
    bool delete_user(string u)
    {
        int position = find_user(u);
        if(position != -1)
        {
            users.erase(users.begin()+position);
            update();
            return true;
        }
        return false;
    }
};
int main()
{
    db DB("Useri");
    //DB.print();//Listare utilizator
    //Adaugare utilizator.
    /*
    string u,p,e;
    cout << "Register new account:\n"\
         << "User: ";
    cin >> u;
    cout << "Pass: ";
    cin >> p;
    cout << "Mail: ";
    cin >> e;
    if(DB.add_user(u,p,e))
    {
        cout << "Registration successful!\n";
    }
    else
    {
        cout << "Registration Failed!\n";
    }*/
    //freeing vector
}