// #include <Arduino.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include "DHT.h"

#define pirPin 4
#define ledPin1 8
#define ledPin2 9
#define buzzerPin 7
#define ldrPin A0
#define dhtPin A2
#define dhtType DHT22

Servo servo;
LiquidCrystal_I2C lcd(0x27, 20, 4);
DHT dht(dhtPin, dhtType);

void setup()
{

    pinMode(pirPin, INPUT);
    pinMode(buzzerPin, INPUT);
    pinMode(ldrPin, INPUT);
    pinMode(ledPin1, OUTPUT);
    pinMode(ledPin2, OUTPUT);

    servo.attach(6);
    lcd.init();
    lcd.backlight();
    dht.begin();
}

void loop()
{
    float readTemp = dht.readTemperature();
    int readBuzzer = digitalRead(buzzerPin);
    int readLdr = map(analogRead(ldrPin), 0, 1024, 100, 0);
    int readPir = digitalRead(pirPin);

    float temp = 0;
    int ldr = 0;
    int pir = 0;

    if (readTemp > 30)
    {
        temp = 1;
        if (readLdr > 80)
        {
            ldr = 1;
            if (readPir == HIGH)
            {
                pir = 1;
            }
        }
    }

    if(temp == 1) {
        lcd.setCursor(0, 0);
        lcd.print("It's hot in here");
        if(ldr == 1) {
            lcd.setCursor(0, 1);
            lcd.print("There's a fire!");
            digitalWrite(buzzerPin, HIGH);
            digitalWrite(ledPin2, HIGH);
            servo.write(180);
            delay(1000);
            if(pir == 1) {
                lcd.setCursor(0, 2);
                lcd.print("There's a person!");
                lcd.setCursor(0, 3);
                lcd.print("Sending help...");
                digitalWrite(ledPin1, HIGH);
            } else {
                lcd.setCursor(0, 2);
                lcd.print("No one is here");
                lcd.setCursor(0, 3);
                lcd.print("Waiting for help...");
                digitalWrite(ledPin1, LOW);
            }
        } else {
            lcd.setCursor(0, 1);
            lcd.print("There's no fire");
            digitalWrite(buzzerPin, LOW);
            digitalWrite(ledPin2, LOW);
            servo.write(0);
        }
    } else {
        lcd.setCursor(0, 0);
        lcd.print("It's not hot");
        lcd.setCursor(0, 1);
        lcd.print("There's no fire");
        digitalWrite(buzzerPin, LOW);
        digitalWrite(ledPin2, LOW);
        servo.write(0);
        digitalWrite(ledPin1, LOW);
    }
}