//#include "esp_sleep.h" // Comment this line for testing without deep sleep

#define MOISTURE_SENSOR_PIN 34  // Pin for soil moisture sensor
#define TRIG_PIN 26  // Pin for ultrasonic sensor trigger
#define ECHO_PIN 27  // Pin for ultrasonic sensor echo
#define RELAY_PIN 25  // Pin for relay controlling the water pump
#define LED_MOISTURE_PIN 32  // Pin for low soil moisture LED
#define LED_WATER_PIN 33  // Pin for low water level LED

#define WATER_LEVEL_THRESHOLD 20  // cm (threshold for minimum water level, below 7L)
#define MOISTURE_THRESHOLD_LOW 400  // Soil moisture threshold (below this, it's considered low moisture)
#define MOISTURE_THRESHOLD_HIGH 600  // Soil moisture threshold (above this, it's considered high moisture)

// Define the time for deep sleep in microseconds (10 minutes = 600,000,000 microseconds)
// #define DEEP_SLEEP_TIME 600000000  // 10 minutes (Comment out for testing without deep sleep)

void setup() {
  // Initialize Serial communication
  Serial.begin(115200);  // Set baud rate to 115200

  // Print a message to indicate the device is starting
  Serial.println("Starting up...");

  // Set pin modes as INPUT/OUTPUT
  pinMode(MOISTURE_SENSOR_PIN, INPUT);  // Pin for soil moisture sensor
  pinMode(TRIG_PIN, OUTPUT);  // Pin for ultrasonic sensor trigger
  pinMode(ECHO_PIN, INPUT);  // Pin for ultrasonic sensor echo
  pinMode(RELAY_PIN, OUTPUT);  // Pin for relay
  pinMode(LED_MOISTURE_PIN, OUTPUT);  // Pin for low soil moisture LED
  pinMode(LED_WATER_PIN, OUTPUT);  // Pin for low water level LED

  // Reading values from sensors
  int moistureValue = analogRead(MOISTURE_SENSOR_PIN);  // Soil moisture reading (analog value)

  // Read value from ultrasonic sensor (measuring distance)
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  long duration = pulseIn(ECHO_PIN, HIGH);
  int distance = (duration * 0.0343) / 2;  // Distance in cm

  // Display values from soil moisture sensor and water level (distance) on Serial Monitor
  Serial.print("Soil Moisture: ");
  Serial.print(moistureValue);
  Serial.println(" (analog value)");

  Serial.print("Water Surface Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  // LED and Pump Control for Soil Moisture
  if (moistureValue < MOISTURE_THRESHOLD_LOW) {
    // Soil is too dry (below 40%)
    Serial.println("Low soil moisture! Pump will be turned on.");
    digitalWrite(RELAY_PIN, HIGH);  // Turn on the water pump
    digitalWrite(LED_MOISTURE_PIN, HIGH);  // Turn on low moisture LED
  } else if (moistureValue > MOISTURE_THRESHOLD_HIGH) {
    // Soil is too wet (above 60%)
    Serial.println("Soil moisture is too high. Pump is off.");
    digitalWrite(RELAY_PIN, LOW);  // Turn off the water pump
    digitalWrite(LED_MOISTURE_PIN, LOW);  // Turn off low moisture LED
  } else {
    // Soil moisture is in optimal range (between 40% and 60%)
    digitalWrite(RELAY_PIN, LOW);  // Turn off the water pump
    digitalWrite(LED_MOISTURE_PIN, LOW);  // Turn off low moisture LED
  }

  // LED and Pump Control for Water Level
  if (distance <= WATER_LEVEL_THRESHOLD) {
    // Water level too low
    Serial.println("Water level too low! Pump will be turned on.");
    digitalWrite(RELAY_PIN, HIGH);  // Turn on the water pump
    digitalWrite(LED_WATER_PIN, HIGH);  // Turn on low water level LED
  } else {
    digitalWrite(RELAY_PIN, LOW);  // Turn off the water pump
    digitalWrite(LED_WATER_PIN, LOW);  // Turn off low water level LED
  }

  // Now enter deep sleep for 10 minutes (comment out this line for testing)
  // Serial.println("Entering deep sleep mode for 10 minutes...");
  // esp_deep_sleep(DEEP_SLEEP_TIME);  // Sleep time in microseconds
}

void loop() {
  // The loop is empty as we are using deep sleep.
  // The ESP32 will restart when it wakes up after deep sleep.
}