#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 16, 2);  

float flamelevel = 0; 
#define greenLED 7 
#define redLED 2 

const int minSurvive = 15; 
const int idleLow = 20; 
const int idleTarget = 30; 
const int firingLow = 70; 
const int firingHigh = 90; 


void setup() {
  lcd.init();
  lcd.clear();
  lcd.backlight();
  Serial.begin(9600);

  pinMode(greenLED, OUTPUT); 
  digitalWrite(greenLED, LOW); 

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

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

  lcd.setCursor(0, 0);
  lcd.print(F("Flame: "));

  if (flamelevel >= firingHigh) { 
    lcd.print("Full Fire");
    digitalWrite(greenLED, HIGH); 
    digitalWrite(redLED, LOW); 
    delay(300);
    digitalWrite(greenLED, LOW); 
  }

  if ((flamelevel >= firingLow) && (flamelevel < firingHigh)) { 
    lcd.print("Firing   ");
    digitalWrite(greenLED, HIGH); 
    digitalWrite(redLED, LOW); 
  }

  if ((flamelevel < firingLow) && (flamelevel > idleLow) ) {  
    lcd.print("Idle fire ");
    digitalWrite(greenLED, HIGH); 
    digitalWrite(redLED, HIGH); 
  }

  if ((flamelevel <= idleLow) && (flamelevel >= minSurvive) ) {  
    lcd.print("Low fire  ");
    digitalWrite(greenLED, LOW); 
    digitalWrite(redLED, HIGH); 
  }

  if (flamelevel < minSurvive) {
    lcd.print("FIRE OUT! ");
    digitalWrite(greenLED, LOW);
    digitalWrite(redLED, HIGH);
    delay(300);
    digitalWrite(redLED, LOW);
  }

  lcd.setCursor(0, 1);
  lcd.print("   Level: ");
  lcd.print(flamelevel, 0);
  lcd.print("%    ");

  delay(200);
}