#include <Servo.h>
#include <DHT.h>
#include <LiquidCrystal_I2C.h>

#define PIR_PIN 2
#define LED_PIN 4
#define BUZZER_PIN 5
#define SERVO_PIN 6
float flamelevel = 0;
#define greenLED 7 
#define redLED 3
const int minSurvive = 15;
const int idleLow = 20;
const int idleTarget = 30;
const int firingLow = 70;
const int firingHigh = 90;
Servo servo;

void setup() {
  Serial.begin(9600);
  pinMode(PIR_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  servo.attach(SERVO_PIN);
  servo.write(90);
  pinMode(greenLED, OUTPUT);
  digitalWrite(greenLED, LOW);

  pinMode(redLED, OUTPUT); 
  digitalWrite(redLED, LOW);
}

void loop() {
  int pirValue = digitalRead(PIR_PIN);
  float analogValue = analogRead(A0);
  Serial.print("Sensor RAW: ");
  Serial.println(analogValue, 0);
  flamelevel = map(analogValue, 0, 1024, 100, 0);

  if (pirValue == HIGH) {
    digitalWrite(LED_PIN, HIGH);
    tone(BUZZER_PIN, 2000);
    delay(500);
    noTone(BUZZER_PIN);
    servo.write(0);
    delay(5000);
    servo.write(90);
  } else {
    digitalWrite(LED_PIN, LOW);
  }
  if (flamelevel >= firingHigh) {
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, LOW); 
    delay(300);
    digitalWrite(greenLED, LOW); 
  }
  if ((flamelevel >= firingLow) && (flamelevel < firingHigh)) {
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, LOW);
  }

  if ((flamelevel < firingLow) && (flamelevel > idleLow) ) {
    digitalWrite(greenLED, HIGH);
    digitalWrite(redLED, HIGH);
  }

  if ((flamelevel <= idleLow) && (flamelevel >= minSurvive) ) {
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    tone(BUZZER_PIN, 2000);
    delay(300);
    noTone(BUZZER_PIN);
  }

  if (flamelevel < minSurvive) {
  
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    tone(BUZZER_PIN, 2000);
    delay(300);
    noTone(BUZZER_PIN);
    delay(300);
    digitalWrite(redLED, LOW);
  }
}