#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <cs50.h>


// declare our global vars that will be shared through out the program's functions
int *digits;
long cardNum;
int firstDigit;
int secondDigit;
int numberOfDigits;
int *evenIndexDigits;
int *oddIndexDigits;



void getInput(void)
{
    // checks input and passes it through a validator, if is valid, return value
    cardNum = get_long("Enter a credit card number: ");
    numberOfDigits = floor(log10(cardNum));
    printf("%d\n", numberOfDigits);
    if (numberOfDigits < 13 || numberOfDigits > 16)
    {
        printf("INVALID check number size!\n");
        exit(0);
    }
    digits = calloc(numberOfDigits, sizeof(int));
    for (int i = 0; i <= numberOfDigits; i++)
    {
        digits[i] = cardNum % 10;
        cardNum /= 10;
    }

    firstDigit = digits[0];
    secondDigit = digits[1];
}

void parse(void)
{
    numberOfDigits += 1;
    int evenCounter = 0;
    int oddCounter = 0;
    if (numberOfDigits % 2 == 0)
    {
        evenIndexDigits = calloc(8, sizeof(int));
        oddIndexDigits = calloc(8, sizeof(int));
        printf("if worked\n");

    }
    else
    {
        evenIndexDigits = calloc(7, sizeof(int));
        oddIndexDigits = calloc(8, sizeof(int));
        printf("else worked\n");

    }
}
string checkValidity(void)
{
    return "i dont exist";
}


int main(void)
{
    getInput();
    //string res = checkValidity();
    parse();


    free(digits);
    free(evenIndexDigits);
    free(oddIndexDigits);
}