#include <EEPROM.h>
#include <LiquidCrystal.h>

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

const int numAreas = 3; // Define the number of areas
long durations[numAreas];
int set_vals[numAreas], percentages[numAreas], priorities[numAreas] = {1, 2, 3};
bool state;
bool pumps[numAreas];
int priorityThreshold = 30; // Adjust this threshold according to priority levels
int switchPin = 10; // Pin connected to the slide switch
int potPin = A0; // Pin connected to the slide potentiometer
int pumpPin = 12; // Pin connected to the pump relay

void setup() {
  lcd.begin(16, 2);
  lcd.print("WATER LEVEL:");
  lcd.setCursor(0, 1);
  lcd.print("PUMP:OFF MANUAL");

  for (int i = 0; i < numAreas; i++) {
    set_vals[i] = EEPROM.read(i);
    if (set_vals[i] > 150) set_vals[i] = 150;
  }

  pinMode(8, OUTPUT);
  pinMode(9, INPUT);
  pinMode(switchPin, INPUT_PULLUP); // Set the slide switch pin as input with internal pull-up resistor
  pinMode(pumpPin, OUTPUT); // Set the pump pin as output
}

void loop() {
  long inches; // Declare inches variable within loop

  for (int i = 0; i < numAreas; i++) {
    digitalWrite(3, LOW);
    delayMicroseconds(2);
    digitalWrite(8, HIGH);
    delayMicroseconds(10);
    digitalWrite(8, LOW);
    durations[i] = pulseIn(9, HIGH);
    inches = microsecondsToInches(durations[i]); // Move declaration here

    percentages[i] = (set_vals[i] - inches) * 100 / set_vals[i];

    // Adjust pump based on water level and priority
    if (percentages[i] < priorityThreshold && digitalRead(switchPin)) {
      pumps[i] = true;
    } else if (percentages[i] > 99) {
      pumps[i] = false;
    }

    digitalWrite(pumpPin, !pumps[i]);

    lcd.setCursor(5 + i * 6, 1);
    if (pumps[i]) lcd.print("ON ");
    else lcd.print("OFF");
  }

  lcd.setCursor(0, 0);
  lcd.print("              "); // Clear previous percentage values
  for (int i = 0; i < numAreas; i++) {
    lcd.setCursor(i * 6, 0);
    lcd.print(percentages[i]);
    lcd.print("% ");
  }

  lcd.setCursor(9, 1);
  if (!digitalRead(switchPin)) lcd.print("MANUAL");
  else lcd.print("AUTO   ");

  // Handle button presses
  if (!digitalRead(potPin) && !state && digitalRead(switchPin)) {
    state = true;
    for (int i = 0; i < numAreas; i++) {
      set_vals[i] = inches;
      EEPROM.write(i, set_vals[i]);
    }
  } else if (!digitalRead(potPin) && !state && !digitalRead(switchPin)) {
    state = true;
    for (int i = 0; i < numAreas; i++) {
      pumps[i] = !pumps[i];
    }
  } else if (digitalRead(potPin)) {
    state = false;
  }

  delay(500);
}

long microsecondsToInches(long microseconds) {
  return microseconds / 74 / 2;
}