#include <time.h>                   // time() ctime()
time_t now;                         // this is the epoch
tm myTimeInfo;                      // the structure tm holds time information in a more convient way


#include <SafeString.h>
createSafeString(myDemo_SS, 32);
createSafeString(mySecondDemo_SS, 32);
#define MaxTimeStampLength 64
createSafeString(TimeStamp_SS, MaxTimeStampLength);

createSafeString(myTitle_SS, 64);  // reserve 64 bytes for the SafeString-variable
createSafeString(myString_SS, 32); // reserve 32 bytes for the SafeString-variable

int myInteger = -1234;
float myFloat = -987.009;

unsigned long myCounter;


//useful function for non-blocking timing
boolean TimePeriodIsOver (unsigned long &periodStartTime, unsigned long TimePeriod) {
  unsigned long currentMillis  = millis();  
  if ( currentMillis - periodStartTime >= TimePeriod )
  {
    periodStartTime = currentMillis; // set new expireTime
    return true;                // more time than TimePeriod) has elapsed since last time if-condition was true
  } 
  else return false;            // not expired
}

unsigned long MyTestTimer = 0;                   // variables MUST be of type unsigned long
const byte    OnBoard_LED = 13; // Arduino-Uno Onboard-LED is IO-pin 13



void setup() {
  Serial.begin(115200);
  Serial.println( F("Setup-Start") );
  myCounter = 0;
  myDemo_SS = "Hello world!";

  myString_SS = F("fixed text directly assigned");
  Serial.print( F(" #") ); // leading double-cross "#" to show where the string starts
  Serial.print(myString_SS); 
  Serial.println(F("#") ); // trailing double-cross "#" to show where the string REALLY ends


  myTitle_SS = F("content of an integer:");
  myString_SS = myInteger;

  Serial.println(myTitle_SS);
  Serial.print( F(" #" )); // leading double-cross "#" to show where the string starts
  Serial.print(myString_SS); 
  Serial.println( F("#") ); // trailing double-cross "#" to show where the string REALLY ends



  myTitle_SS = F("content of a float:");
  myString_SS = myFloat;

  Serial.println(myTitle_SS);
  Serial.print( F(" #" )); // leading double-cross "#" to show where the string starts
  Serial.print(myString_SS); 
  Serial.println( F("#") ); // trailing double-cross "#" to show where the string REALLY ends

  myTitle_SS = F("you can append more text with the +=-operator ");
  myString_SS = F("text ");
  myString_SS += myInteger;
  myString_SS += F(" ,");
  myString_SS += myFloat;

  Serial.println(myTitle_SS);
  Serial.print( F(" #" )); // leading double-cross "#" to show where the string starts
  Serial.print(myString_SS); 
  Serial.println( F("#") ); // trailing double-cross "#" to show where the string REALLY ends  

}


void loop() {
  myCounter++;
  
  // loop is running very fast counting up very fast
  // but only once every 1234 milliseconds print 
  if ( TimePeriodIsOver(MyTestTimer,5234) ) {
    mySecondDemo_SS = myDemo_SS;  // assigning a SafeString to another SafeString
    
    mySecondDemo_SS += " ";       // append a SPACE
    mySecondDemo_SS += myCounter; // append integer-number
    Serial.println(mySecondDemo_SS);   
    StoreTimeStampIntoSS(TimeStamp_SS);
    Serial.println(TimeStamp_SS);
    Serial.println(TimeStamp_SS.c_str() );     
  }  

}


void StoreTimeStampIntoSS(SafeString& p_RefToSS) {

  time(&now);                               // read the current time
  localtime_r(&now, &myTimeInfo);           // update the structure tm with the current time

  //p_RefToSS = " ";
  p_RefToSS  = myTimeInfo.tm_year + 1900;
  p_RefToSS += ".";
  if (myTimeInfo.tm_mon + 1 < 10) {
    p_RefToSS += "0";  
  }
  p_RefToSS += myTimeInfo.tm_mon + 1;
  p_RefToSS += ".";

  if (myTimeInfo.tm_mday < 10) {
    p_RefToSS += "0";  
  }
  p_RefToSS += myTimeInfo.tm_mday;

  p_RefToSS += "; ";

  if (myTimeInfo.tm_hour < 10) {
    p_RefToSS += "0";  
  }  
  p_RefToSS += myTimeInfo.tm_hour;
  p_RefToSS += ":";

  if (myTimeInfo.tm_min < 10) {
    p_RefToSS += "0";  
  }  
  p_RefToSS += myTimeInfo.tm_min;
  p_RefToSS += ":";

  if (myTimeInfo.tm_sec < 10) {
    p_RefToSS += "0";  
  }  
  p_RefToSS += myTimeInfo.tm_sec;
}