//Delete_Files_timestamp
//05/20/2010 @ 20:06 EDT
 
/* Example showing timestamp support in LittleFS */
/* Released into the public domain. */
/* Earle F. Philhower, III <earlephilhower@yahoo.com> */

#ifdef ESP8266
#include <ESP8266WiFi.h>
#include <LittleFS.h>
#elif #defined ESP32
#include <WiFi.h>
#include <LittleFS.h>
#endif

#include <ESP8266FtpServer_LittleFS.h>

#ifndef STASSID
#define STASSID "yourSSID"
#define STAPSK  "yourPASSWORD"
#endif

const char *ssid = STASSID;
const char *pass = STAPSK;

FtpServer ftpSrv;

unsigned long int i;


char* filelist[30];

long timezone = -5;
byte daysavetime = 1;


bool getLocalTime(struct tm * info, uint32_t ms) {
  uint32_t count = ms / 10;
  time_t now;

  time(&now);
  localtime_r(&now, info);

  if (info->tm_year > (2016 - 1900)) {
    return true;
  }

  while (count--) {
    delay(10);
    time(&now);
    localtime_r(&now, info);
    if (info->tm_year > (2016 - 1900)) {
      return true;
    }
  }
  return false;
}

void listDel(const char * dirname) {
  Serial.printf("Listing root directory. \n");

  Dir root = LittleFS.openDir("/");

  root.rewind();

  while(root.next())
  {

    File file = root.openFile("r");

    String str = root.fileName();
         
    i++;
    filelist[i] = strdup(str.c_str());
    Serial.print(filelist[i]);
    Serial.print("  ");
    Serial.print(i);
    Serial.println("");
    time_t cr = file.getCreationTime();
    time_t lw = file.getLastWrite();
    file.close();
    struct tm * tmstruct = localtime(&cr);
    Serial.printf("    CREATION: %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
    tmstruct = localtime(&lw);
    Serial.printf("  LAST WRITE: %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct->tm_year) + 1900, (tmstruct->tm_mon) + 1, tmstruct->tm_mday, tmstruct->tm_hour, tmstruct->tm_min, tmstruct->tm_sec);
    Serial.print("\n");
    
  }
    
  if(i >= 8)  
  {

    for(i = 1;i < 5; i++)  //Delete only first four files; keep from getting too many log files.
    {
        
        LittleFS.remove("/" + String(filelist[i]));
        Serial.print("Removed:  ");
        Serial.print(filelist[i]);
        Serial.print("  ");
        Serial.print(i);
        Serial.println("");

    }
    
    i = 0;  

  }
  else
  {

    Serial.print("\n");
    Serial.println("No Files to remove.");

  }
   
}

void setup() {
  Serial.begin(115200);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.println("\n\n\n\n");
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, pass);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.println("Contacting Time Server");
  
  configTime(3600 * timezone, daysavetime * 3600, "time.nist.gov", "0.pool.ntp.org", "1.pool.ntp.org");
  struct tm tmstruct ;
  
  tmstruct.tm_year = 0;
  getLocalTime(&tmstruct, 5000);
  delay(2000);
  Serial.printf("\nNow is : %d-%02d-%02d %02d:%02d:%02d\n", (tmstruct.tm_year) + 1900, (tmstruct.tm_mon) + 1, tmstruct.tm_mday, tmstruct.tm_hour, tmstruct.tm_min, tmstruct.tm_sec);
  Serial.println("");
  //Serial.println("Formatting LittleFS filesystem");
  //LittleFS.format();
  Serial.println("Mount LittleFS");
  if (!LittleFS.begin()) {
    Serial.println("LittleFS mount failed");
    return;
  }

 
////////////////////////// FTP /////////////////////////////////
//FTP Setup, ensure SPIFFS is started before ftp;
////////////////////////////////////////////////////////////////

     Serial.println("LittleFS opened!");
     Serial.println("");
     ftpSrv.begin("esp32", "esp32");    //username, password for ftp.  set ports in ESP8266FtpServer.h  (default 21, 50009 for PASV)
     
/////////////////////// End FTP//////////////////////////////

  listDel("/");

}

void loop() { 
  
  ///////////////////////////////////////////////////// FTP ///////////////////////////////////
  for(int x = 1;x < 5000;x++)
  {
    ftpSrv.handleFTP();
  }
  /////////////////////////////////////////////////////////////////////////////////////////////
  
}