#include <stdio.h>

#define BUTTON_PIN 13
#define BUTTON_PRESSED 0
#define BUTTON_RELEASED 1
#define LED_PIN 12
#define LED_ON 1
#define LED_OFF 0

int lastButtonState = BUTTON_RELEASED;
char command[10];

int my_putChar(char ch, FILE *f) {
    return Serial.write(ch);
}

int my_getChar(FILE *f) {
    while (!Serial.available());
    return Serial.read();
}

void setup(void) {
    pinMode(BUTTON_PIN, INPUT_PULLUP);
    pinMode(LED_PIN, OUTPUT);
    digitalWrite(LED_PIN, LED_OFF);
    
    Serial.begin(9600);
    FILE *my_stream = fdevopen(my_putChar, my_getChar);
    stdin = stdout = my_stream;
    
    printf("Sistem pornit. Comenzi disponibile:\n");
    printf("- led on : pentru a aprinde LED-ul\n");
    printf("- led off : pentru a stinge LED-ul\n");
}

void processSerialCommand() {
    if (fgets(command, sizeof(command), stdin) != NULL) {
        command[strcspn(command, "\n")] = 0; 

        if (strcmp(command, "led on") == 0) {
            digitalWrite(LED_PIN, LED_ON);
            printf("Comanda confirmata: LED aprins.\n");
        } else if (strcmp(command, "led off") == 0) {
            digitalWrite(LED_PIN, LED_OFF);
            printf("Comanda confirmata: LED stins.\n");
        } else {
            printf("Comanda necunoscuta. Incercati 'led on' sau 'led off'.\n");
        }
    }
}

void loop(void) {
    
    if (Serial.available()) {
        processSerialCommand();
    }

    
    int buttonState = digitalRead(BUTTON_PIN);
    if (buttonState != lastButtonState) {
        if (buttonState == BUTTON_PRESSED) {
            digitalWrite(LED_PIN, LED_ON);
            printf("Buton apasat - LED aprins.\n");
        } else if (buttonState == BUTTON_RELEASED) {
            digitalWrite(LED_PIN, LED_OFF);
            printf("Buton eliberat - LED stins.\n");
        }
        lastButtonState = buttonState;
    }

    delay(50);
}