#include <Adafruit_GFX.h>
#include "Font4x7Fixed.h"
#include <Adafruit_NeoMatrix.h>
#include <Adafruit_NeoPixel.h>
#include <ESP8266WiFi.h>
#include <time.h>

#define PIN  3
#define BRIGHTNESS 10

const char *ssid = "cammar";
const char *password = "shadow10121976";
const char* ntpServer = "ro.pool.ntp.org";
const char* TZ_INFO    = "EET-2EEST,M3.5.0/3,M10.5.0/4";
struct tm timeinfo;
time_t now;
long unsigned lastNTPtime;
unsigned long lastEntryTime;
unsigned long previousMillis = 0;

String dash = String(':');
String minus = String('-');
String space = String(' ');

Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN,
                            NEO_MATRIX_TOP     + NEO_MATRIX_LEFT +
                            NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG,
                            NEO_GRB            + NEO_KHZ800);

const uint16_t colors[] = {
  matrix.Color(128, 0, 0), matrix.Color(0, 128, 0), matrix.Color(0, 0, 128),
  matrix.Color(128, 0, 128), matrix.Color(0, 128, 128), matrix.Color(128, 128, 0)
};

int pass = 0;
int x = matrix.width();

char daysOfTheWeek[7][12] = {"Duminica", "Luni", "Marti", "Miercuri", "Joi", "Vineri", "Sambata"};

bool getNTPtime(unsigned long sec) {
  {
    unsigned long start1 = millis();
    do
    {
      time(&now);
      localtime_r(&now, &timeinfo);
      delay(10);
    } while (((millis() - start1) <= (1000 * sec)) && (timeinfo.tm_year < (2023 - 1900)));

    if (timeinfo.tm_year <= (2023 - 1900))
      return false;
  }
  return true;
}


void setup() {
  Serial.begin(9600);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
  }
  configTime(0, 0, ntpServer);
  setenv("TZ", TZ_INFO, 1);
  getNTPtime(10);
  showTime(&timeinfo);
  lastNTPtime = time(&now);
  lastEntryTime = millis();
  matrix.begin();
  matrix.setFont(&Font4x7Fixed);
  matrix.setTextSize(1);
  matrix.setTextWrap(false);
  matrix.setBrightness(BRIGHTNESS);
  matrix.setTextColor(colors[0]);
}

void loop() {
  showTime(&timeinfo);
  getNTPtime(10);
}

void showTime(tm *localTime) {
String timeHour = String(localTime->tm_hour);
Serial.print("timeHour = "); Serial.println(String(timeHour));

String timeMinute = String(localTime->tm_min);
Serial.print("timeMinute = "); Serial.println(String(timeMinute));

String timeSeconds = String(localTime->tm_sec);
Serial.print("timeSeconds = "); Serial.println(String(timeSeconds));

String timeWeekDay = String(daysOfTheWeek[localTime->tm_wday]);
Serial.print("timeWeekDay = "); Serial.println(String(timeWeekDay));

String timeMonth = String(localTime->tm_mon + 1);
Serial.print("timeMonth = "); Serial.println(String(timeMonth));

String timeDay = String(localTime->tm_mday);
Serial.print("timeDay = "); Serial.println(String(timeDay));

String timeYear = String(localTime->tm_year - 100);
Serial.print("timeYear = "); Serial.println(String(timeYear));


  String timeShow = String(timeHour) + String(space) + String(dash) + String(space) + String(timeMinute) + String(space) + String(dash) + String(space) + String(timeSeconds);
  String dateShow = String(timeWeekDay) + String(space) + String(space) + String(timeDay) + String(space) + String(minus) + String(space) + String(timeMonth) + String(space) + String(minus) + String(space) + String(timeYear);
  Serial.print("timeShow = "); Serial.println(timeShow);
  Serial.print("dateShow = "); Serial.println(dateShow);

  const long interval = 30000;
  const long interval2 = 50000;
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {
    if (currentMillis - previousMillis >= interval2) {
      previousMillis = currentMillis;
    }
    matrix.fillScreen(0);
    matrix.setCursor(x, 0);
    matrix.print(dateShow);
    if (--x < -40) {
      matrix.setTextColor(matrix.Color(128, 0, 0));
    }
    matrix.show();
    delay(150);
  } else {
    matrix.clear();
    matrix.setCursor(0, 0);
    matrix.print(timeShow);
    pass++;
    if (pass >= 6) pass = 0;
    matrix.setTextColor(colors[pass]);
    matrix.show();
    delay(1000);
  }
}