#include <iostream>
#include <string.h>
#include <string>
using namespace std;

bool checkChars(char arg[])
{
    for(unsigned int i = 0; i < strlen(arg); i++)
        if(!strchr("1234567890qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM", arg[i]))
            return false;
    return true;
}

bool isOk(char arg[], int mode)
{
    switch(mode)
    {
    case 0:
        if(checkChars(arg) == false)
            return false;
        break;

    case 1:
        if(strlen(arg) < 3)
        {
            cout<<"Password is to short!";
            return false;
        }
        else
        {
            char aux[250];
            strcpy(aux, arg);
            for(int unsigned i = 0; i < strlen(aux); i++)
                aux[i] = tolower(aux[i]);
            if(strcmp(aux, arg) == 0)
            {
                cout<<"Password is insecure!";
                return false;
            }
        }
        break;

    case 2:
        bool isAt = false, isDot = false;
        char leftAux[250], rightAux[250], aux[250];

        for (int unsigned i = 0; i < strlen(arg); i++)
            if(arg[i] == '@')
                isAt = true;
            else
            {
                leftAux[i] = arg[i];
                leftAux[i+1] = '\0';
            }
        if(isAt == false || strlen(leftAux) < 1 || checkChars(leftAux) == false)
            return false;

        strcpy(rightAux, strstr(arg, "@"));
        strcpy(rightAux, rightAux + 1);


        strcpy(aux, rightAux);
        leftAux[0] = rightAux[0] = '\0';
        for(int unsigned i = 0; i < strlen(aux); i++)
            if(aux[i] == '.')
                isDot = true ;
            else
            {
                leftAux[i] = aux[i];
                leftAux[i+1] = '\0';
            }
        if(isDot == false || strlen(leftAux) < 1 || checkChars(leftAux) == false)
            return false;

        strcpy(rightAux, strstr(aux, "."));
        strcpy(rightAux, rightAux + 1);
        if(strlen(rightAux) < 2 || checkChars(rightAux) == false)
            return false;

        break;
    }
    return true;
}

int main(int argc, char *argv[])
{
    bool u = false, p = false, e = false;
    string user, password, email;

    for(int i =  1; i < argc; i = i + 2 )
    {
        if (u == false && !strcmp(argv[i], "-u"))
        {
            if(isOk(argv[i+1], 0) == false)
            {
                cout<<"Username is not valid!";
                return 1;
            }
            user = argv[i+1];
            u = true;
        }
        else if(p == false && !strcmp(argv[i], "-p"))
        {
            if(isOk(argv[i+1], 1) == false)
                return 1;
            password = argv[i+1];
            p = true;
        }
        else if(e == false && !strcmp(argv[i], "-e"))
        {
            if(isOk(argv[i+1], 2) == false)
            {
                cout<<"E-mail is not valid!";
                return 1;
            }
            email = argv[i+1];
            e = true;
        }
    }

    if(e == true && p == true)
        cout<<"User "<<user<<" has the email "<<email<<" and the password "<<password;
    else if(e == true && p == false)
        cout<<"User "<<user<<" has the email "<<email;
    return 0;
}