// Learn about the ESP32 WiFi simulation in
// https://docs.wokwi.com/guides/esp32-wifi

#include <WiFi.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 20, 4);

#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     3600
#define UTC_OFFSET_DST 3600

String denTydne[7]{"pondeli", "utery", "streda", "ctvrtek", "patek", "sobota", "nedele"};
int denTydneNo;

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  LCD.setCursor(15, 1);
  LCD.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    LCD.setCursor(0, 0);
    LCD.println("Proved restart,");
    LCD.setCursor(0, 1);
    LCD.println("chyba WiFi pripojeni");
    return;
  }

  // LCD.setCursor(12, 0);
  // LCD.println(&timeinfo, "%H:%M:%S");

  LCD.setCursor(0, 0);
  LCD.println(&timeinfo, "%d.%m.%Y, %H:%M:%S");
  LCD.setCursor(3, 3);
  LCD.print(&timeinfo, "%w. den uklidu ");
  LCD.setCursor(2, 2);
  LCD.println("BJ05 Wroblowska");
}

void setup() {
  Serial.begin(115200);

  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print("Pripojovani k Wifi");
  // LCD.setCursor(0, 1);
  // LCD.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }

  Serial.println("");
  Serial.println("WiFi pripojena");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  LCD.clear();
  LCD.setCursor(0, 0);
  LCD.println("Pripojeno");
  LCD.setCursor(0, 1);
  LCD.println("Aktualizace casu...");

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
  delay(500);
  LCD.clear();
  LCD.setCursor(0, 2);
  // LCD.println(">> ============== <<");
  LCD.setCursor(0, 1);
  LCD.print("Uklid provadi: ");
}

void loop() {
  printLocalTime();
  // LCD.setCursor(0, 1);
  // LCD.println("                    ");
  delay(250);
}