#include "Arduino.h"
#include <queue>
std::queue<String>  v_audioContent;
using namespace std;
void vector_clear_and_shrink(queue<String>&vec);

void setup() {
  Serial.begin(115200);
  uint32_t ms = millis();
  Serial.println("BEGIN------------------------");
  mem();
  for (uint8_t f = 0; f < 10; f++)
  {
    add();
    mem();
    while (!v_audioContent.empty()) {
      // const char* s = (const char*)v_audioContent[v_audioContent.size() -1];
     String s = v_audioContent.front();
    //    Serial.printf("%s\n", s);
      v_audioContent.pop();
    }

    //if (v_audioContent.size() == 0)
    if (v_audioContent.empty())
      vector_clear_and_shrink(v_audioContent); // free memory
    Serial.print("FOR------------------------:");
    Serial.println(f);
    mem();
  }


  //  if(v_audioContent.size() == 0)
  //      vector_clear_and_shrink(v_audioContent); // free memory

  Serial.println("END-queue-----------------------");
  uint32_t ms2 = millis();
  Serial.print("TIME:"); Serial.println((ms2 - ms));
}

void loop() {
  delay(1000);
}

void add() {
  String ruString ;
  /*
  ruString = "Привет";  //RU
  char cbuffer[ruString.length() + 1] = "";
  //Serial.println(myString);  // debug
  strcpy( cbuffer, ruString.c_str() );
  v_audioContent.push(String(cbuffer));

  ruString = "1234Privet;";
  v_audioContent.push( ruString);
  const char* c = "TESt 1234;2";
  v_audioContent.push( String(c));
  */
  for (int n = 0; n < 1000; n++)
  {
    ruString = String(n);
    char cbuffer[ruString.length() + 1] = "";
    //Serial.println(myString);  // debug
    strcpy( cbuffer, ruString.c_str());
    v_audioContent.push(ruString.c_str());
  //  String nn = String(n);
  //  v_audioContent.push(nn.c_str());
  }
}

void vector_clear_and_shrink(queue<String>&vec)
{
  /*
    uint size = vec.size();
    for (int i = 0; i < size; i++) {
        if(vec[i]){
            free(vec[i]);
            vec[i] = NULL;
        }
    }
    vec.clear();
    vec.shrink_to_fit();
  */
}

//-----------------------------MEM
void mem()
{

  uint32_t freeHeapBytes = heap_caps_get_free_size(MALLOC_CAP_DEFAULT);
  uint32_t totalHeapBytes = heap_caps_get_total_size(MALLOC_CAP_DEFAULT);
  float percentageHeapFree = freeHeapBytes * 100.0f / (float)totalHeapBytes;
  // Print to serial
  Serial.printf("[Memory] %.1f%% free - %d of %d bytes free\n", percentageHeapFree, freeHeapBytes, totalHeapBytes);
  uint32_t Free = ESP.getFreeHeap();
  uint32_t  alloc = ESP.getMaxAllocHeap();
  Serial.print("Free:"); Serial.print(Free);
  Serial.print(" alloc:"); Serial.println(alloc);

}