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



void setup() {
  // Set GPIO PINS
  pinMode(16, INPUT_PULLUP);  // Water Button GPIO Input Pin
  pinMode(4, INPUT_PULLUP);   // Drain Button GPIO Input Pin
  pinMode(18, OUTPUT);        // Water LED GPIO Output PIN
  pinMode(19, OUTPUT);        // Drain LED GPIO Output Pin
  pinMode(14, OUTPUT);        // Water Valve Contactor Digital Output GPIO Pin
  pinMode(13, OUTPUT);        // Drain Valve Contactor Digital Output GPIO Pin
  Serial.begin(115200);

  //Initialize PIN STATES
  digitalWrite(14, LOW);    // SET Water Valve OFF
  digitalWrite(13, LOW);    // SET Drain Valve OFF
  digitalWrite(18, LOW);    // SET Water LED OFF
  digitalWrite(19, LOW);    // SET Drain LED OFF
}
void loop() {

  // CHECK CONDITIONS FOR WATER VALVE BUTTON PRESS
  // Check if Water Button is Pressed and Water Contactor Valve Contactor is OFF and Drain Valve is OFF
  if (digitalRead(16) == LOW && digitalRead(13) == LOW && digitalRead(14) == LOW) {
    digitalWrite(13, HIGH);  // Turn On Water Valve Contactor
    digitalWrite(18, HIGH);  // Turn On Water LED
    Serial.println("Water Button Pressed, Water Valve was Closed - Opening Water Valve "); //debug line
    delay(500);
  }

  // Check if Water Button is Pressed and Water Contactor Valve Contactor is ON and Drain Valve is OFF
  else if (digitalRead(16) == LOW && digitalRead(13) == HIGH && digitalRead(14) == LOW) {
    digitalWrite(13, LOW); // Turn Off Water Valve Contactor
    digitalWrite(18, LOW); // Turn Off Water LED
    Serial.println("Water Button Pressed, Water Valve was Open - Closing Water Valve"); //debug line
    delay(500);
  }

  // Check if Water Button is Pressed and Water Contactor Valve Contactor is OFF and Drain Valve is ON
  else if (digitalRead(16) == LOW && digitalRead(13) == LOW && digitalRead(14) == HIGH) {
    digitalWrite(14, LOW);  // Turn Off Drain Valve Contactor
    Serial.println("Water Button Pressed, Drain Valve Open - Closing Drain Valve - 30 Second Blink Delay"); //debug line
    // BLINK LEDS
    for (int i = 0; i < 10; i++) {
      digitalWrite(19, !digitalRead(19)); // Toggle Drain LED
      delay(1000); // Wait for 1 second
    }
    digitalWrite(19, LOW); // Turn Off Drain LED
    digitalWrite(13, HIGH); // Turn On Water Valve Contactor
    digitalWrite(18, HIGH); // Turn On Water LED
    Serial.println("Opening Water Valve"); //debug line
    delay(500);
  }

  // CHECK CONDITIONS FOR DRAIN VALVE BUTTON PRESS
  // Check if Drain Button is Pressed and DRAIN Valve Contactor is OFF and Water Valve is OFF
  else if (digitalRead(4) == LOW && digitalRead(14) == LOW && digitalRead(13) == LOW) {
    digitalWrite(14, HIGH);  // Turn On Drain Valve Contactor
    digitalWrite(19, HIGH); // Corrected syntax: added missing semicolon
    Serial.println("Drain Button Pressed, Drain Valve was Closed - Opening Drain Valve "); //debug line
    delay(500);
  }

  // Check if Drain Button is Pressed and Drain Valve Contactor ON and Water Valve Contactor is OFF
  else if (digitalRead(4) == LOW && digitalRead(14) == HIGH && digitalRead(13) == LOW) {
    digitalWrite(14, LOW);
    digitalWrite(19, LOW); // Corrected syntax: added missing semicolon
    Serial.println("Drain Button Pressed, Drain Valve was Open - Closing Drain Valve"); //debug line
    delay(500);
  }

  // Check if Drain Button is Pressed and DRAIN Valve Contactor is OFF and Water Valve is ON
  else if (digitalRead(4) == LOW && digitalRead(14) == LOW && digitalRead(13) == HIGH) {
    digitalWrite(13, LOW);  // Turn Off Water Valve
    Serial.println("Drain Button Pressed, Water Valve Open - Closing Water Valve - 30 Second Blink Delay"); //debug line
    // BLINK LEDS
    for (int i = 0; i < 10; i++) {
      digitalWrite(18, !digitalRead(18)); // Toggle Water LED
      delay(1000); // Wait for 1 second
    }
    digitalWrite(18, LOW); // Turn Off Water LED
    digitalWrite(14, HIGH); // Turn On Drain Valve Contactor
    digitalWrite(19, HIGH); // Turn On Drain LED
    Serial.println("Opening Drain Valve"); //debug line
    delay(500);
  }
}