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

#define DHT_PIN 2
#define DHT_TYPE DHT22
#define LCD_ADDRESS 0x27
#define LCD_COL 16
#define LCD_ROW 2
#define RED_LED_PIN 13
#define BLUE_LED_PIN 12
#define YELLOW_LED_PIN 8

enum Climate {HOT = 40, NORMAL = 30, COLD = 20};

// sensor struct objects
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_ROW, LCD_COL);
DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  // put your setup code here, to run once:
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(BLUE_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  Serial.begin(9600);
  dht.begin();

  lcd.init();
  lcd.backlight();

  lcd.setCursor(LCD_COL - 2, 0);
  lcd.print("\xDF");
  lcd.print("C");
  lcd.setCursor(LCD_COL - 1, 1);
  lcd.print("%");
}

void loop() {
  // put your main code here, to run repeatedly:
  float temp = dht.readTemperature();
  float humid = dht.readHumidity();

  lcd.setCursor(0, 0);
  lcd.print(temp);

  lcd.setCursor(0, 1);
  lcd.print(humid);

  if (temp <= Climate::COLD) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, LOW);
  } else if (temp >= Climate::NORMAL && temp < Climate::HOT) {
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, HIGH);
  } else if (temp >= Climate::HOT ) {
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(BLUE_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
  } else {
  }
  delay(2250);
}