#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Define the LCD I2C address, number of columns and rows
LiquidCrystal_I2C lcd(0x27, 16, 2);

// Define the pin for reading the water level sensor
int readPin = A0;

// Variable to store the read value from the sensor
int readValue;

// Define the pins for the buzzer, relay, and speaker
const int buzzerPin = 13;
const int relayPin = 9;
const int speakerPin = 10; // Add the speaker pin

// Flag to indicate if the "Water is full" message has been played
bool messagePlayed = false;

// Variable to store the start time of the buzzer sound
unsigned long buzzerStartTime = 0;

// Variable to count the number of times the buzzer has played
int buzzerCount = 0;

void setup() {
  // Initialize the LCD and turn on the backlight
  lcd.begin(16, 2);
  lcd.backlight();

  // Set the readPin as an input, and the buzzerPin, relayPin, and speakerPin as outputs
  pinMode(readPin, INPUT);
  pinMode(buzzerPin, OUTPUT);
  pinMode(relayPin, OUTPUT);
  pinMode(speakerPin, OUTPUT); // Set the speaker pin as an output

  // Initialize serial communication at 9600 baud
  Serial.begin(9600);
}

void loop() {
  // Clear the LCD screen
  lcd.clear();

  // Read the value from the water level sensor
  readValue = analogRead(readPin);

  // Map the read value to a percentage (0-100)
  int waterLevelPercentage = map(readValue, 0, 1023, 0, 100);

  // Display the water level percentage on the LCD
  lcd.print("Water Level: ");
  lcd.print(waterLevelPercentage);
  lcd.print("%");

  // Set the cursor to the second line of the LCD
  lcd.setCursor(0, 1);

  // Check the water level and display the corresponding message
  if (waterLevelPercentage < 25) {
    lcd.print("Low");
    digitalWrite(relayPin, HIGH); // Turn on the relay (e.g. to fill the tank)
  } else if (waterLevelPercentage < 99) {
    lcd.print("Medium");
    digitalWrite(relayPin, HIGH); // Keep the relay on
  } else {
    lcd.print("Full");
    lcd.setCursor(0, 1);
    lcd.print("Full"); // Display "The water is full" message

    // Play the "Water is full" message only once
    if (!messagePlayed) {
      playVoiceMessage(speakerPin, "The water is full"); // Play the voice message
      messagePlayed = true;
    }

    // Start playing the buzzer sound every 1 second, and play only 10 times
    if (buzzerCount < 5) {
      tone(buzzerPin, 2000, 400); // Play the buzzer sound for 100 ms
      buzzerCount++;
      delay(500); // Wait for 500 millisecond
    } else {
      noTone(buzzerPin); // Stop the buzzer sound
    }

    digitalWrite(relayPin, LOW); // Turn off the relay (e.g. to stop filling the tank)
  }

  // Wait for 1 second before taking the next reading
  delay(1000);
}

// Function to play a voice message through the speaker
void playVoiceMessage(int speakerPin, String message) {
  // Code to play the voice message through the speaker
  // This will depend on the specific speaker and voice module being used
  // For example, you could use a library like the "VarioSpeak" library
}