#include <WiFi.h>
#include <HTTPClient.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <ArduinoJson.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
HTTPClient http;
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

void setup() {
  Serial.begin(9600);
  Serial.print("Connecting to WiFi");
  WiFi.begin("Wokwi-GUEST", "", 6);
  Serial.begin(115200);
  while (WiFi.status() != WL_CONNECTED) {
    delay(100);
    Serial.print(".");
  }
  Serial.println(" Connected!");

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  delay(2000);
  display.clearDisplay();

  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 0);
}

void loop() {
  if ((WiFi.status() == WL_CONNECTED)) {
    HTTPClient http;
    http.begin("https://api.openweathermap.org/data/2.5/weather?id=1562693&appid=83f609f43532fb74956aa06f8f10bac3");
    int httpCode = http.GET();

    if (httpCode > 0) {
      String payload = http.getString();

      // Parse JSON
      DynamicJsonDocument doc(1024); // Adjust the size depending on your payload
      DeserializationError error = deserializeJson(doc, payload);

      if (error) {
        Serial.print("deserializeJson() failed: ");
        Serial.println(error.f_str());
        return;
      }

      // Extract temperature
      JsonObject main = doc["main"];
      float temp = main["temp"];
      temp -= 273.15; // Convert from Kelvin to Celsius

      // Display temperature on OLED screen
      display.clearDisplay();
      display.setCursor(0, 0);
      display.println("Temperature: ");
      display.print(temp);
      display.println(" do C");
      display.display();
    }
    else {
      Serial.println("Error on HTTP request");
    }
    http.end();
  }
  delay(1000);
}