#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>

struct account
{
	char user[30];
	char password[30];
	char newpassword[30];
	int control;
};

int passwordIsLongEnough(char str[]) //kontrollerar längden på lösenordet
{
	int i;
	int counter = 0;
	int returnera;
	for (i = 0; str[i] != '\0'; i++)
		counter++;
	if (counter < 8)
		returnera = 0;

	else
		returnera = 1;
	return returnera;
}

int passwordContainsDigit(char str[]) //kontrollerar om det finns en siffra i lösenordet
{
	int i;
	int digit = 0;
	int returnera;
	for (i = 0; str[i] != '\0'; i++)

		if (isdigit(str[i]))
			digit++;
	if (digit > 0)
		returnera = 1;
	else
		returnera = 0;
	return returnera;
}

int passwordHasMixedCase(char str[]) //kontrollerar om det finns en stor och en liten bokstav i lösenordet
{
	int i;
	int returnera = 0;
	int upper = 0;
	int lower = 0;

	for (i = 0; str[i] != '\0'; i++)
	{
		if (islower(str[i]))
			lower++;

		if (isupper(str[i]))
			upper++;

		if (upper > 0 && lower > 0)
			returnera = 1;

		else
			returnera = 0;
	}

	return returnera;
}

int isSafePassword(char str[])
{
	int length;
	int digit;
	int upperlowercase;
	int returnera;
	int faultcounter = 0;
	length = passwordIsLongEnough(str);
	digit = passwordContainsDigit(str);
	upperlowercase = passwordHasMixedCase(str);

	if (length == 1 && digit == 1 && upperlowercase == 1)
	{
		returnera = 1;
	}

	else
	{
		returnera = 0;
	}

	if (length == 0)
	{
		printf("Your password is not long enough\n");
		faultcounter++;
	}
	if (digit == 0)
	{
		printf("Your password must contain at least one number\n");
		faultcounter++;
	}

	if (upperlowercase == 0)
	{
		printf("Your password must contain one upper case letter and one lower case letter\n");
		faultcounter++;
	}

	if (faultcounter > 0)
	{
		printf("you have %d, faults with your password\n", faultcounter);
	}

	return returnera;
}


struct account konto(void)
{
	struct account userAccount;
	printf("Enter username:\n");
	scanf("%s", userAccount.user);

	do
	{
		do
		{
			printf("Enter password:\n");
			scanf("%s", userAccount.password);
			userAccount.control = isSafePassword(userAccount.password);
		} while (userAccount.control == 0);
		printf("Confirm your password:\n");
		scanf("%s", userAccount.newpassword);

		if (strcmp(userAccount.password, userAccount.newpassword) == 0)
			printf("Password confirmed\n");
		else
			printf("Passwords do not match\n");
	} while (strcmp(userAccount.password, userAccount.newpassword) != 0);
	return userAccount;

}


int main(void)
{
	int konton;
	int i;

	printf("How many useraccounts should be used?\n");
	scanf("%d", &konton);
	struct account*arr = (struct account*)malloc(sizeof(struct account)*konton);

	if (arr == NULL)
		printf("Not possible to allocate %d elements", konton);
	else
		for (i = 0; i < konton; i++)
		{
			arr[i] = konto();
		}
	printf("Username: \t \t Password: \n");
	for (i = 0; i < konton; i++)

		printf("%s \t \t %s \n", arr[i].user, arr[i].password);
	free(arr);

	return 0;

}