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

#define natural unsigned short

void Vector_bites();
void Rights_admin();

int main() {
	natural option;
	do {
		printf("0. Iesire.\n");
		printf("1. Vector de biti.\n");
		printf("2. Drepturi de utilizator.\n");
		printf("Introduce-ti optiunea dorita: "); scanf("%hu", &option);
		system("cls");
		switch (option)
		{
		case 0:
			printf("Sper ca te ai distrat.\n");
			system("pause");
			exit(0);
			break;
		case 1:
			Vector_bites();
			break;
		case 2:
			Rights_admin();
			break;
		default:
			printf("A-ti introdus valori gresite\n");
			break;
		}
	} while (1);
}

void Read_elem(char *vect){
	natural i, x, numberElem;
	printf("Introduceti numarul de elemente: "); scanf("%hu", &numberElem);

	for (i = 0; i < numberElem; i++) {
		printf("v[%d] = ", i + 1); scanf("%hu", &x);
		vect[x / 8] |= 1 << x % 8;
	}
}

void Verif_elem(char *vect) {
	natural x;
	printf("Introduceti numarul cautat: "); scanf("%hu", &x);

	if (vect[x / 8] & (1 << x % 8))
		printf("Numarul se afla in vector\n\n");
	else
		printf("Numarul nu se afla in vector\n\n");
}

void Vector_bites() {
	char vect[126];
	natural i, ok;
	for (i = 0; i < 125; i++)
			vect[i] = 0;
	Read_elem(&vect[0]);

	do {
		Verif_elem(vect);
		printf("Mai cautati alt numar? 0/1 : "); scanf("%hu", &ok);
	} while (ok);
}

typedef enum{Read = 1, Write = 2, Delete = 4, Rename = 8, Copy = 16, All = 31}rights;

void Add_rights(char *user, rights Right) {
	*user  |= Right;
}

void Remove_rights(char *user, rights Right) {
	*user &= ~Right;
}

void Show_rights(char user, natural i) {
	if (user == 31)
		printf("Utilizatorul %hu are drepturi depline.\n", i + 1);
	else if (user == 0)
		printf("Utilizatorul %hu nu are drepturi asupra acestui fiser.\n", i + 1);
	else {
		printf("Utilizatorul %hu are drepturile: ", i + 1);
		if (user & Read)
			printf("Citire, ");
		if (user & Write)
			printf("Scriere, ");
		if (user & Delete)
			printf("Stergere, ");
		if (user & Rename)
			printf("Redenumire, ");
		if (user & Copy)
			printf("Copiere, ");

		printf("\b\b. \n");
	}

}

void Rights_admin() {
	natural numberUsers, i, option, option2;
	char *users;
	do {
		printf("Introduceti numarul de utilizatori: "); scanf("%hu", &numberUsers);
	} while (!numberUsers);
	users = (char *)malloc(sizeof(char) * numberUsers);
	for (i = 0; i < numberUsers; i++) users[i] = 0;
	Add_rights(&users[0], All);
 	do {

		printf("\nPrimul utilizator are drepturi depline.\n\n");
		printf("0. Introarcere in main.\n");
		printf("1. Adaugare de drepturi.\n");
		printf("2. Scoatere de drepturi.\n");
		printf("3. Afisarare drepturilor utilizatorilor.\n");
		printf("Introduceti optiunea dorita: "); scanf("%hu", &option);
		system("cls");

		switch (option)
		{
		case 1:
			printf("Utilizatorul caruia i se adauga: "); scanf("%hu", &i);
			i--;
			if (!i) {
				printf("\nPrimul utilizator nu se poate modifica.\n\n");
				continue;
			}
			printf("\nIntroduceti cifrele corspunzatoare drepturilor dorite!\n");
			printf("1. Citire.\n");
			printf("2. Scriere.\n");
			printf("3. Stergere.\n");
			printf("4. Redenumire.\n");
			printf("5. Copiere.\n");
			printf("6. Toate.\n");
			printf("Introduceti optiunea dorita: "); scanf("%hu", &option2);
			do {
				switch (option2 % 10) {
				case 1: Add_rights(&users[i], Read);
					break;
				case 2: Add_rights(&users[i], Write);
					break;
				case 3: Add_rights(&users[i], Delete);
					break;
				case 4: Add_rights(&users[i], Rename);
					break;
				case 5: Add_rights(&users[i], Copy);
					break;
				default :
					break;
				}
				if (option2 % 10 == 6) {
					Add_rights(&users[i], All);
					break;
				}
				option2 /= 10;
			} while (option2);
			break;
		case 2:
			printf("Utilizatorul caruia i se scoate: "); scanf("%hu", &i);
			i--;
			if (!i) {
				printf("Primul utilizator nu se poate modifica\n");
				continue;
			}
			printf("\nIntroduceti cifrele corspunzatoare drepturilor dorite!\n");
			printf("1. Citire.\n");
			printf("2. Scriere.\n");
			printf("3. Stergere.\n");
			printf("4. Redenumire.\n");
			printf("5. Copiere.\n");
			printf("6. Toate\n");
			printf("Introduceti optiunea dorita: "); scanf("%hu", &option2);
			do {
				switch (option2 % 10) {
				case 1: Remove_rights(&users[i], Read);
					break;
				case 2: Remove_rights(&users[i], Write);
					break;
				case 3: Remove_rights(&users[i], Delete);
					break;
				case 4: Remove_rights(&users[i], Rename);
					break;
				case 5: Remove_rights(&users[i], Copy);
					break;
				default:
					break;
				}
				if (option2 % 10 == 6) {
					Remove_rights(&users[i], All);
					break;
				}
				option2 /= 10;
			} while (option2);
			break;
		case 3:
			for (i = 0; i < numberUsers; i++)
				Show_rights(users[i], i);
			break;
		default:
			printf("Date introduse gresit!\n");
			break;
		}
	} while (option);
}