#define maxBufferLen 80


char *buffer;
char *upperCase;
char *lowerCase;
char *numbers;

static SemaphoreHandle_t mutex;

static volatile bool allocated = 0;
unsigned short bufferIndex = 0;

TaskHandle_t listenHandle = NULL;
TaskHandle_t separateHandle = NULL;

void listenToSerialMonitor(void*) {
  while (1) {
    if (!allocated) {
      buffer = (char *)calloc(maxBufferLen, sizeof(char));
      if (buffer == NULL) {
        Serial.println("Memory allocation failed!");
      } else {
        allocated = 1;
      }
    }

    while (Serial.available()) {
      char c = Serial.read();
      if (bufferIndex < maxBufferLen - 1 && c != '\n') {
        buffer[bufferIndex++] = c;
      } else {
        buffer[bufferIndex] = '\0';
        bufferIndex = 0;
        vTaskResume(separateHandle);
      }
    }
  }
}

void separate(void*) {
  while (1) {
    for (i = 0; i < maxBufferLen; i++) {
      if (buffer[i] >= 65 && buffer[i] <= 90) { //separando as Maiúsculas
        upperCase[i] = buffer[i];
      }

      if (buffer[i] >= 97 && buffer[i] <= 122) { //separando as minúsculas
        lowerCase[i] = buffer[i];
      }

      if (buffer[i] >= 48 && buffer[i] <= 57) { //separando os números
        numbers[i] = buffer[i];
      }
    }
    free(buffer);
    allocated = 0;


    vTaskSuspend(NULL);
  }
}

void ordenar(char *x) {
  int temp = 0;
  for (int i = 0; i < t; i++) {
    for (int j = i + 1; j < t; j++) {
      if (x[i] > x[j]) {
        temp = x[i];
        x[i] = x[j];
        x[j] = temp;
      }
    }
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  xTaskCreatePinnedToCore(listenToSerialMonitor,
                          "Listen to Serial Monitor",
                          1024,
                          NULL,
                          1,
                          &listenHandle,
                          1);

  xTaskCreatePinnedToCore(separate,
                          "Send to Serial Monitor",
                          1024,
                          NULL,
                          1,
                          &separateHandle,
                          2);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}