#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

const int PIN_BUTTON = 17;
const char* NAME_WIFI = "Wokwi-GUEST";
const char* PASSWORD = "";
const String WEBSITE = "http://api.openweathermap.org/data/2.5/weather?q=Moscow,ru,pt&APPID=";
const String KEY = "cdecb72a7903eb3bb1964c39615f1764";
const unsigned long TIME_OUT = 30000;
int printMessage = 0;

LiquidCrystal_I2C lcd(0x27, 16, 2);

HTTPClient http;

StaticJsonDocument<1500> document;
DeserializationError error;

void setup() {

  Wire.begin();

  lcd.init();

  WiFi.begin(NAME_WIFI, PASSWORD);

  while (WiFi.status() != WL_CONNECTED) {

    lcd.print("Connecting to");
    lcd.setCursor(0, 1);
    lcd.print("WiFi...");

    delay(1000);

    lcd.clear();
  }

  http.begin(WEBSITE + KEY);

  pinMode(PIN_BUTTON, INPUT);
  digitalWrite(PIN_BUTTON, HIGH);

  request();
}

void request() {

  static int httpGet = 0;
  static String httpRequest;

  if (WiFi.status() == WL_CONNECTED) {

    httpGet = http.GET();

    if (httpGet > 0) {

      httpRequest = http.getString();

      error = deserializeJson(document, httpRequest);

      printRequest();
    }
    else {

      lcd.clear();

      lcd.print("HTTP request");
      lcd.setCursor(0, 1);
      lcd.print("error!");
    }
  }
}

void pruntMeaning(float meaning) {

  lcd.setCursor(0, 1);
  lcd.print(meaning);
  lcd.write(254);
}

void printRequest() {

  static float meaning = 0;

  lcd.clear();

  if (error) {

    lcd.print("Request failed!");
  }
  else if (printMessage == 0) {
    
    meaning = static_cast<float> (document["main"]["temp"]);
    
    meaning -= 273,15;

    lcd.print("Temperature");

    pruntMeaning(meaning);

    lcd.write(223);
    lcd.write(67);
  }
  else if (printMessage == 1) {

    meaning = static_cast<float> (document["main"]["feels_like"]);

    meaning -= 273,15;

    lcd.print("Feels like, temp");

    pruntMeaning(meaning);

    lcd.write(223);
    lcd.write(67);
  }
  else if (printMessage == 2) {

    meaning = static_cast<float> (document["main"]["humidity"]);

    lcd.print("Humidity");

    pruntMeaning(meaning);

    lcd.print("%");
  }
}

int debounce(int lasts, int buttonPort) {
  
  int currents = digitalRead(buttonPort);

  if (lasts != currents) {

    delay(15);

    return digitalRead(buttonPort);
  }
  else {

    return lasts;
  }
}

void button () {

  static int currunt = LOW;
  static int last = LOW;

  currunt = debounce(last, PIN_BUTTON);

  if (last == HIGH && currunt == LOW) {

    printMessage++;

    if (printMessage > 2) {

      printMessage = 0;
    }

    printRequest();
  }

  last = currunt;
}


void loop() {

  static unsigned long time = millis();

  if (millis() - time > TIME_OUT) {

    time = millis();

    request();
  }

  button ();

  delay(10);
}