// Pin definitions for ESP32
const int pumpMotorPin = 16;
const int waterLevelWarningPin = 17;
const int waterLevelCriticalPin = 18;
const int ledPumpRunningPin = 19;
const int ledSystemNormalPin = 21;
const int ledSystemAlarmPin = 22;
  
// Alarm flags
volatile bool longRunAlarm = false;
volatile bool shortRunAlarm = false;
volatile bool pumpRunContinuousAlarm = false;
volatile bool pumprunning = false;
volatile bool highWaterWarningAlarm = false;
volatile bool highWaterCriticalAlarm = false;

// Historical states
volatile bool pumprunningold = false;

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


  // Initialize pins
  pinMode(pumpMotorPin, INPUT_PULLUP);
  pinMode(waterLevelWarningPin, INPUT_PULLUP);
  pinMode(waterLevelCriticalPin, INPUT_PULLUP);
  pinMode(ledPumpRunningPin, OUTPUT);
  pinMode(ledSystemNormalPin, OUTPUT);
  pinMode(ledSystemAlarmPin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:

  // check status of input pins
  checkInputs();

  delay(10); // this speeds up the simulation
}

void checkInputs(){
  pumprunning = digitalRead(pumpMotorPin);
  highWaterWarningAlarm = digitalRead(waterLevelWarningPin);
  highWaterCriticalAlarm = digitalRead(waterLevelCriticalPin);

  //Serial.println(pumprunning);
  // check if the pump is running.
  // if it is, the pumprunning state is HIGH
  if (pumprunning == HIGH && pumprunningold == false) {
    // turn Pump Runing LED on
    digitalWrite(ledPumpRunningPin, HIGH);
    pumprunningold = true;
    //printLocalTime();
    Serial.println(" The pump is running - turning on pump runing LED");
  } 
  
  if (pumprunning == LOW && pumprunningold == true) {
    // turn Pump Runing LED off
    digitalWrite(ledPumpRunningPin, LOW);
    // update pumprunningstatus
    pumprunningold = false;
    //printLocalTime();
    Serial.println(" The pump is not running - turning off pump runing LED");
  }

  if( highWaterWarningAlarm == true && pumprunning == true){
    digitalWrite(ledSystemNormalPin, HIGH);
  }
  else{
    digitalWrite(ledSystemNormalPin, LOW);
  }
  
  if( highWaterCriticalAlarm == true && pumprunning == true){
    digitalWrite(ledSystemAlarmPin, HIGH);
  }
  else{
    digitalWrite(ledSystemAlarmPin, LOW);
  }
}