#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <ThreeWire.h>
#include <RtcDS1302.h>

// OLED settings
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// DS1302 setup
ThreeWire myWire(7, 6, 8); // DAT, CLK, RST
RtcDS1302<ThreeWire> Rtc(myWire);

void setup() {
  Serial.begin(9600);

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  display.setTextSize(1);
  display.setCursor(0, 0);
  display.println("Erbil Clock Starting...");
  display.display();
  delay(1500);

  Rtc.Begin();

  // ⚠️ Set Erbil time ONCE (24-hour format), then comment this block out:
  RtcDateTime compiled = RtcDateTime(2025, 10, 13, 17, 18, 0); // YYYY,MM,DD,HH,MM,SS
  Rtc.SetDateTime(compiled);
  // ---- After uploading once, comment these 2 lines and upload again ----
}

void loop() {
  RtcDateTime now = Rtc.GetDateTime();

  int hour = now.Hour();
  int minute = now.Minute();
  int second = now.Second();

  // Convert to 12-hour format
  int displayHour = hour % 12;
  if (displayHour == 0) displayHour = 12;
  const char* ampm = (hour >= 12) ? "PM" : "AM";

  // Format time string
  char timeBuf[12];
  sprintf(timeBuf, "%02d:%02d:%02d %s", displayHour, minute, second, ampm);

  // Show on OLED
  display.clearDisplay();
  display.setTextSize(2);
  display.setCursor(10, 20);
  display.print(timeBuf);

  display.setTextSize(1);
  display.setCursor(40, 50);
  display.print("Erbil Time");

  display.display();
  delay(500);
}