#include "calculator.h"

void handleCalc(struct calculator *calc, int input) {
	switch (calc->state) {
		case NUMBER_FIRST:
		switch (input) {
			case 0:
			calc->num1 = (calc->num1 * 10) + 7;
			break;
			case 1:
			calc->num1 = (calc->num1 * 10) + 8;
			break;
			case 2:
			calc->num1 = (calc->num1 * 10) + 9;
			break;
			case 3:
			calc->operation = DIV;
			calc->state = NUMBER_SECOND;
			break;
			case 4:
			calc->num1 = (calc->num1 * 10) + 4;
			break;
			case 5:
			calc->num1 = (calc->num1 * 10) + 5;
			break;
			case 6:
			calc->num1 = (calc->num1 * 10) + 6;
			break;
			case 7:
			calc->operation = MUL;
			calc->state = NUMBER_SECOND;
			break;
			case 8:
			calc->num1 = (calc->num1 * 10) + 1;
			break;
			case 9:
			calc->num1 = (calc->num1 * 10) + 2;
			break;
			case 10:
			calc->num1 = (calc->num1 * 10) + 3;
			break;
			case 11:
			calc->operation = SUB;
			calc->state = NUMBER_SECOND;
			break;
			case 12:
			calc->num1 = (calc->num1 * 10);
			break;
			case 13:
			clearCalc(calc);
			break;
			case 14:
			break;
			case 15:
			calc->operation = ADD;
			calc->state = NUMBER_SECOND;
			break;
		}
		break;
		case NUMBER_SECOND:
		switch (input) {
			case 0:
			calc->num2 = (calc->num2 * 10) + 7;
			break;
			case 1:
			calc->num2 = (calc->num2 * 10) + 8;
			break;
			case 2:
			calc->num2 = (calc->num2 * 10) + 9;
			break;
			case 3:
			break;
			case 4:
			calc->num2 = (calc->num2 * 10) + 4;
			break;
			case 5:
			calc->num2 = (calc->num2 * 10) + 5;
			break;
			case 6:
			calc->num2 = (calc->num2 * 10) + 6;
			break;
			case 7:
			break;
			case 8:
			calc->num2 = (calc->num2 * 10) + 1;
			break;
			case 9:
			calc->num2 = (calc->num2 * 10) + 2;
			break;
			case 10:
			calc->num2 = (calc->num2 * 10) + 3;
			break;
			case 11:
			break;
			case 12:
			calc->num2 = (calc->num2 * 10);
			break;
			case 13:
			clearCalc(calc);
			break;
			case 14:
			switch (calc->operation) {
				case ADD:
				calc->result = calc->num1 + calc->num2;
				calc->state = RESULT;
				break;
				case SUB:
				calc->result = calc->num1 - calc->num2;
				calc->state = RESULT;
				break;
				case MUL:
				calc->result = calc->num1 * calc->num2;
				calc->state = RESULT;
				break;
				case DIV:
				calc->result = calc->num1 / calc->num2;
				calc->state = RESULT;
				break;
			}
			break;
			case 15:
			break;
		}
		break;
		case RESULT:
		switch (input) {
			case 13:
				clearCalc(calc);
			case 14:
			clearCalc(calc);
			break;
		}
		break;
	}
}
void clearCalc(struct calculator* calc) {
	calc->state = NUMBER_FIRST;
	calc->operation = NO_OP;
	calc->num1 = 0;
	calc->num2 = 0;
	calc->result = 0;
}