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

int passwordIsLongEnough(char str[])
{
	int i, Count = 0, siffra;

	for (i = 0; str[i] != '\0'; i++)

		Count++;

	if (Count < 8)
	{
		siffra = 0;
	}
	else if (Count >= 8)
	{
		siffra = 1;
	}
	return siffra;
}

int passwordContainsDigit(char str[])
{
	int i, digitCount = 0, digits;
	for (i = 0; str[i] != '\0'; i++)
		if (isdigit(str[i]))
			digitCount++;

	if (digitCount < 1)
	{
		digits = 0;
	}
	else
	{
		digits = 1;
	}
	return digits;
}

int passwordHasMixedCase(char str[])
{
	char i, upper = 0, lower = 0, mixed;
	for (i = 0; str[i] != '\0'; i++)
	{
		if (isupper(str[i]))
			upper++;
		if (islower(str[i]))
		lower++;
	}
	if (upper >0 && lower >0)
		mixed = 1;
	else
		mixed = 0;
	return mixed;
}

int containsFourLetters(char str[])
{
	int i, letterCount = 0, letters;
	for (i = 0; str[i] != '\0'; i++);
	{
		if (isalpha(str[i]))
		{
			letterCount++;
		}
	}

	if (letterCount < 4)
	{
		letters = 0;
	}
	else
	{
		letters = 1;
	}

	return letters;
}

int isSafePassword(char password[])
{
	int length, digits, mixed, letters, SAFE;
	length = passwordIsLongEnough(password);
	digits = passwordContainsDigit(password);
	mixed = passwordHasMixedCase(password);
	letters = containsFourLetters(password);

	if (length == 1 && digits == 1 && mixed == 1 && letters==0)
	{
		SAFE = 1;
		printf("This password is safe!");
	}
	else
	{
		SAFE = 0;
		printf("Your password is not safe!");

		if (length == 0)
		{
			printf("\nYou need to have at least 8 character!");
		}
		if (digits == 0)
		{
			printf("\nYou need to have at least one digit!");
		}
		if (mixed == 0)
		{
			printf("\nYou need to have at least one small and one big letter!");
		}
		if (letters == 1)
		{
			printf("\nYou passsword contains more than 3 letters!");
		}
	}
	return SAFE;
}



struct account
{
	char name[30];
	char password[30];
	char newpassword[30];
	int SAFE;
};

void capitalize(char Name[])
{

		Name[0] = toupper(Name[0]);


}


struct account EnterAccount(void)
{
	struct account person;
	printf("\n\nEnter your username:");
	scanf("%s", person.name);


	capitalize(person.name);


	do
	{
		do
		{
			printf("\nEnter password:");
			scanf("%s", person.password);
			person.SAFE = isSafePassword(person.password);
		} while (person.SAFE == 0);

		printf("\nEnter the same password");
		scanf("%s", person.newpassword);

		if (strcmp(person.password, person.newpassword) != 0)
		{
			printf("The passwords are not matching!");
		}
		else
		{
			printf("Your account is accepted!");
			printf("\nThe password %s is associated whith user :%s", person.password, person.name);
		}
	}while (strcmp(person.password, person.newpassword) != 0);

	return person;
}

int main(void)
{
	int amount;
	int i;
	printf("How many accounts do you want to enter?");
	scanf("%d", &amount);
	account* arr = (account*)malloc(sizeof(account)*amount);

	if(arr==NULL)
	{
		printf("could not allocate %d elements!\n ", amount);
	}

	else
	{
		for (i = 0; i < amount; i++)
		{
			arr[i] = EnterAccount();

		}

		printf("\n\nUsername");
		printf("\tPassword");

		for (i = 0; i < amount; i++)
		{
			printf("\n%s", arr[i].name);
			printf("\t\t%s", arr[i].password);
		}

		free(arr);
	}

	return 0;
}