/* ESP32 = Output HIGH to switch  Relay on

* Setup
Set an interval

* Loop
after interval
choose a random time
switch relay on for the random time

switch relay off after random time
check interval remaining
repeat random time
**
20230915 Random time ON for a set time interval works
         Step through time array works

      need a 'run for time'
      need a stop function after time finished

*/ 

//Define pins
#define RelayPin 23 

// define pin states
bool RelayPin_state = false;

// Define variables
int i =0;

// Define time variables
unsigned long setInterval = 8000;
unsigned long LoopInterval;
unsigned long timeNow;
unsigned long timeInterval;
unsigned long timeRemaining;
unsigned long timeOn; 
unsigned long timerLoop; 
unsigned long resultNextLoop = (timeNow - timeInterval); 
unsigned long resultNextRelaySwitch = (timeNow - (timerLoop + timeOn)); 



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

  //Set pin modes
  pinMode(RelayPin, OUTPUT);
  digitalWrite(RelayPin, LOW);

  //set  start timers
  LoopInterval = setInterval;

}

void loop() {
  
 Serial.println("************");
  timeNow = millis();
  Serial.print("timeNow = ");  Serial.println(timeNow);
  resultNextLoop = timeNow -(timeNow - timerLoop);
  Serial.print("NextLoop = "); Serial.println(resultNextLoop);
  resultNextRelaySwitch = (timeOn);
  Serial.print("time Interval = ");  Serial.println(timeInterval);
  Serial.print("resultNextRelaySwitch = ");  Serial.println(timeNow - timeInterval);
  Serial.println("///////");

 // after relay being on for Time On, switch relay off
  if ((timeNow - timeInterval) > timeOn) 
     {
        switchRelayOff();
        //stepTime();
      }

  //after interval switch relay on for a choosen time
  if ((timeNow - timerLoop) > LoopInterval) 
     {  Serial.println("Choose time");
        //chooseTimeOn();
        stepTime();
      }

 

}

// step through and increase time on intervals
void stepTime()
    { 
      
      bool stepTimeStarted;
      if (!stepTimeStarted){int i = 0;}

      
        stepTimeStarted = true;
        int TimeSlotsArray[5] = {2, 3, 4, 5, 6}; // 2, 3, 4, 5, 6
        int Timeslot = TimeSlotsArray[i]; 
        i++; 
        timeOn = Timeslot * 1000 ;
        Serial.print("index = ");
        Serial.println(i);
        Serial.print("stepTimeStarted = ");
        Serial.println(stepTimeStarted);
        switchRelayOn();
        
      
    }


//choose a random time
void chooseTimeOn() 
    { Serial.println("Random time");
    int TimeSlotsArray[5] = {2, 3, 4, 5, 6}; // 2, 3, 4, 5, 6
    int index = random(1,5);
    int Timeslot = TimeSlotsArray[index];
    timeOn = Timeslot * 1000 ;
    timerLoop = millis();
    Serial.println(timeOn);
   // switch relay on for the random time
       
        switchRelayOn();
    }

    // switch relay on for time and start relay on timer
void switchRelayOn()
    { 
    Serial.println("Switch Relay ON");
    digitalWrite(RelayPin, true);
    timeInterval = millis();
    timerLoop = millis();
    Serial.println(RelayPin_state);
    Serial.print("timeOn = ");
    Serial.println(timeOn);
    }

   // switch relay off 
void switchRelayOff()
    { 
    Serial.println("Switch Relay OFF");
    digitalWrite(RelayPin, false);
    timeInterval = 0;
    
    Serial.println(RelayPin_state);
    Serial.print("timeOn = ");
    Serial.println(timeOn);
    }