#include <WiFi.h>
#include "ThingSpeak.h"
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

#define DHTPIN 33         // Pin pre DHT22
#define DHTTYPE DHT22     // Typ senzora DHT22
#define RED_LED 25        // Červená LED
#define BLUE_LED 26       // Modrá LED

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2888899; // Sem vlož vlastné číslo kanála
const char* myApiKey = "3JTYX21SGNL1COPX"; // Sem vlož vlastný Write API Key

WiFiClient client;
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 2);
unsigned long previousMillis = 0;

void setup() {
    Serial.begin(115200);
    WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Wifi not connected");
    }
    Serial.println("Wifi connected!");
    Serial.println("Local IP: " + String(WiFi.localIP()));

    WiFi.mode(WIFI_STA);
    ThingSpeak.begin(client);
    dht.begin();
    lcd.init();
    lcd.backlight();
    pinMode(RED_LED, OUTPUT);
    pinMode(BLUE_LED, OUTPUT);
}


void loop() {
    float temperature = dht.readTemperature();
    float humidity = dht.readHumidity();

    if (isnan(temperature) || isnan(humidity)) {
        Serial.println("Chyba pri čítaní z DHT senzora");
        return;
    }

    Serial.print("Teplota: "); Serial.print(temperature);
    Serial.print("°C, Vlhkosť: "); Serial.print(humidity);
    Serial.println("%");

    lcd.setCursor(0, 0);
    lcd.print("T: ");
    lcd.print(temperature);
    lcd.print("C H:");
    lcd.print(humidity);
    lcd.print("%");

    lcd.setCursor(0, 1);
    int barLength = map(temperature, 0, 40, 0, 16);
    for (int i = 0; i < barLength; i++) {
        lcd.print("x");
    }

    // Ovládanie LED
    if (temperature < 10) {
        digitalWrite(RED_LED, HIGH);  // Červená LED svieti
        digitalWrite(BLUE_LED, LOW);  // Modrá LED nesvieti
    } else if (temperature > 30) {
        digitalWrite(RED_LED, LOW);   // Červená LED nesvieti
        digitalWrite(BLUE_LED, HIGH); // Modrá LED svieti
    } else {
        digitalWrite(RED_LED, LOW);   // Ani jedna LED nesvieti
        digitalWrite(BLUE_LED, LOW);
    }

    // Posielanie dát do ThingSpeak
    ThingSpeak.setField(1, temperature); // Teplota do grafu 1
    int ledStatus = (digitalRead(RED_LED) == HIGH) ? 0 : (digitalRead(BLUE_LED) == HIGH) ? 10 : 5;
    ThingSpeak.setField(2, ledStatus); // Stav LED do grafu 2

    int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
    if (x == 200) {
        Serial.println("Úspešná aktualizácia kanála.");
    } else {
        Serial.println("Chyba pri odosielaní dát: " + String(x));
    }

    lcd.setCursor(15, 0);
    lcd.print("A");
    delay(5000);
    lcd.setCursor(15, 0);
    lcd.print(" ");
    delay(5000);
}