#include <GxEPD.h>
#include <GxGDEM029T94/GxGDEM029T94.h>   
#include <GxIO/GxIO_SPI/GxIO_SPI.h>
#include <GxIO/GxIO.h>  
#include <SPI.h>
#include <Fonts/FreeMonoBold9pt7b.h>
#include <Fonts/FreeMonoBold12pt7b.h>

// For the NTP access
#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>

#define EPD_CS   15
#define EPD_DC   21
#define EPD_RSET 22
#define EPD_BUSY 23
#define EPD_SCLK 4
#define EPD_MISO -1
#define EPD_MOSI 5

GxIO_Class io(SPI, EPD_CS, EPD_DC, EPD_RSET);
GxEPD_Class display(io, EPD_RSET, EPD_BUSY);

// Access
const char* ssid = "Wokwi-GUEST";
const char* password = "";

// Define NTP Server
const char* ntpServerName = "pool.ntp.org";

// Initialize UDP client for NTP
WiFiUDP ntpUDP;

// Define time zone (GMT-3 for Sao Paulo, Brasil)
const long utcOffsetInSeconds = (-3) * 3600;
NTPClient timeClient(ntpUDP, ntpServerName, utcOffsetInSeconds);

void setup()
{
  // Init ePaper
  SPI.begin(EPD_SCLK, EPD_MISO, EPD_MOSI);
  display.init();
  display.setRotation(1);
  display.fillScreen(GxEPD_WHITE);
  display.setTextColor(GxEPD_BLACK);
  display.setFont(&FreeMonoBold9pt7b);
  display.setCursor(0, 0);

  // Init WiFi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    display.print(".");
  }
  display.println("");
  display.println("WiFi connected");
  display.println("IP address: ");
  display.println(WiFi.localIP());
  
  delay(3000);
  display.update();

  // Initialize the time client
  timeClient.begin();
  timeClient.setTimeOffset(utcOffsetInSeconds);
}

void loop() {
  
    // Update the time from the NTP server
    timeClient.update();

    // Get the current time
    uint8_t hours = timeClient.getHours();
    uint8_t minutes = timeClient.getMinutes();
    uint8_t seconds = timeClient.getSeconds();

    // Display the time on the ePaper
    display.fillScreen(GxEPD_WHITE);
    display.printf("%d : %d", hours, minutes);

    display.update();
    delay(1000);
}

void Screen1_Bus() {
  // Show the time for the next bus
  return;
}

void Screen2_Activities() {
  // Show the activies by the rommies
  return;
}

void Screen3_Weather() {
  // Show the weather at now
  return;
}

void Screen4_AtHome() {
  // Show the rommies at home
  return;
}