/* Windows 95 Keygen - 11/24/20
   By Paper
   not sure if this will work fully, but from what i've seen it works well enough
*/
#include <ctime>
#include <cstdlib>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <string>

int a(), b(), c(), d(), e();
int main(int argc, char* argv[]){
	int endpoint, startpoint, sadsong;
	srand((unsigned) time(NULL));
	if(argc>=2){
		if (strcmp(argv[1], "--office") == 0){
			startpoint = c();
			sadsong = 4;
		}
		else if (strcmp(argv[1], "--oem") == 0){
			int first = d(), third = e();
			std::cout << std::setw(5) << std::setfill('0') << first;
			std::cout << "-OEM-";
			std::cout << std::setw(7) << std::setfill('0') << third << "-";
			std::cout << std::setw(5) << std::setfill('0') << (rand() % 100000);
			return 0;
		}
		else if (strcmp(argv[1], "--normal") == 0){
			startpoint = a();
			sadsong = 3;
		}
		else {
			std::cout << "usage: " << argv[0] << " [--normal] [--oem] [--office]";
			return 0;
		}
	}
	else {
		std::cout << "usage: " << argv[0] << " [--normal] [--oem] [--office]";
		return 0;
	}
	endpoint = b();
	std::cout << std::setw(sadsong) << std::setfill('0') << startpoint << "-";
	std::cout << std::setw(7) << std::setfill('0') << endpoint;
	return 0;
}
int a(){
	int num;
    num = rand() % 1000;
    while ((num == 333) and (num == 444) and (num == 555) and (num == 666) and (num == 777) and (num == 888) and (num == 999)){
        num = rand() % 1000;
	}
	while ((num % 3) != 0){
		num=num+1;
	}
    return num;
}
int b(){
    int first_digits = rand() % 10000000;
    int last_digit = rand() % 10;
    while ((last_digit == 0) || (last_digit >= 8)){
        last_digit = rand() % 10;
	}
	std::string thisis = std::to_string(first_digits);
	std::string veryfrustrating = std::to_string(last_digit);
    std::string second_segment_p1 = (std::string(thisis) + std::string(veryfrustrating));
	int second_segment = std::stoi(second_segment_p1);
	while (second_segment % 7 != 0){
		first_digits = rand() % 10000000;
		last_digit = rand() % 10;
		while ((last_digit == 0) || (last_digit >= 8)){
			last_digit = rand() % 10;
		}
		std::string thisis = std::to_string(first_digits);
		std::string veryfrustrating = std::to_string(last_digit);
		std::string second_segment_p1 = (std::string(thisis) + std::string(veryfrustrating));
		second_segment = std::stoi(second_segment_p1);
	}
    return second_segment;
}

int c(){
    int new_site = rand() % 1000;
    int ez_pwned = new_site % 10 + 1;
    while (ez_pwned >= 10){
		ez_pwned = ez_pwned - 10;
	}
	std::string thisisstill = std::to_string(new_site);
	std::string prettyfrustrating = std::to_string(ez_pwned);
	std::string iamsocool = (std::string(thisisstill) + std::string(prettyfrustrating));
    int mysinusesareclogged = std::stoi(iamsocool);
    return mysinusesareclogged;
}

int d(){
    int day = (rand() % 366) + 1;
	const char* years[] = {"95", "96", "97", "98", "99", "00", "01", "02", "03"};
    int index = (rand() % 9);
	const char* year = years[index];
	std::string iamsotired = std::to_string(day);
	std::string ofdoingthis = year;
	std::string pleasehelp = (std::string(iamsotired) + std::string(ofdoingthis));
	int ohmygod = std::stoi(pleasehelp);
    return ohmygod;
}

int e(){
    int first_digits = rand() % 1000000;
    int last_digit = rand() % 10;
	std::string thisis = std::to_string(first_digits);
	std::string veryfrustrating = std::to_string(last_digit);
    std::string second_segment_p1 = (std::string(thisis) + std::string(veryfrustrating));
	int second_segment = std::stoi(second_segment_p1);
	while (second_segment % 7 != 0){
		first_digits = rand() % 10000000;
		last_digit = rand() % 10;
		std::string thisis = std::to_string(first_digits);
		std::string veryfrustrating = std::to_string(last_digit);
		std::string second_segment_p1 = (std::string(thisis) + std::string(veryfrustrating));
		second_segment = std::stoi(second_segment_p1);
	}
    return second_segment;
}