#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <WiFi.h>
#include <time.h>

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1
#define SCREEN_ADDRESS 0x3C

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* ntpServer = "pool.ntp.org";
const long gmtOffset_sec = -25200;
const int daylightOffset_sec = 0;

void setup() {
  Serial.begin(115200);
  Wire.begin();
  if (!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
    Serial.println(F("SSD1306 allocation failed"));
    for (;;);
  }
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer);
}

void loop() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);

  struct tm timeinfo;
  if(!getLocalTime(&timeinfo)){
    Serial.println("Failed to obtain time");
    return;
  }

  char date[20];
  strftime(date, sizeof(date), "%d/%m/%Y", &timeinfo);
  
  char time[20];
  strftime(time, sizeof(time), "%H:%M:%S", &timeinfo);

  display.print("MST Date: ");
  display.println(date);
  
  display.print("MST Time: ");
  display.println(time);

  display.display();
}