/*
  ESP32 HTTPClient Jokes API Example

  https://wokwi.com/projects/342032431249883731

  Copyright (C) 2022, Uri Shaked
*/

#include <ArduinoJson.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <DHT.h>
#include <WiFi.h>
#include <Wire.h>


#define NTP_SERVER     "pool.ntp.org"
#define UTC_OFFSET     1
#define UTC_OFFSET_DST 1

#define DHTPIN 13     
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);

#define BTN_PIN 5
#define TFT_DC 2
#define TFT_CS 15
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);



void measureTemp() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  tft.setTextColor(ILI9341_WHITE);
  if (isnan(temperature) || isnan(humidity)) {
    tft.println(F("Failed to read from DHT sensor!"));
    return;
  }
  
  tft.setCursor(0, 0);
  tft.print(F("Humidity: "));
  tft.print(humidity);
  tft.print(F("%"));
  tft.setCursor(0, 20);
  tft.print(F("Temperature: "));
  tft.print(temperature);
  tft.write(0xF7);
  tft.print("C");
}

void spinner() {
  static int8_t counter = 0;
  const char* glyphs = "\xa1\xa5\xdb";
  tft.setCursor(15, 20);
  tft.print(glyphs[counter++]);
  if (counter == strlen(glyphs)) {
    counter = 0;
  }
}

void printLocalTime() {
  struct tm timeinfo;
  if (!getLocalTime(&timeinfo)) {
    tft.setCursor(0, 50);
    tft.println("Connection Err");
    return;
  }

  tft.setCursor(0, 50);
  tft.println(&timeinfo, "%H:%M");

  tft.setCursor(0, 70);
  tft.println(&timeinfo, "%d/%m/%Y");
}



void setup() {
  pinMode(BTN_PIN, INPUT_PULLUP);

  dht.begin();
  tft.begin();
  tft.setRotation(1);

  tft.setTextColor(ILI9341_WHITE);
  tft.setTextSize(2);

  tft.print("Connecting to ");
  tft.setCursor(0, 20);
  tft.print("WiFi ");

  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
    spinner();
  }
  tft.fillScreen(ILI9341_BLACK);
  tft.println("WiFi connected");
  delay(250);
  tft.fillScreen(ILI9341_BLACK);

  configTime(UTC_OFFSET, UTC_OFFSET_DST, NTP_SERVER);
  setTimezone("CET-1CEST,M3.5.0,M10.5.0/3");
}

void loop() {
  measureTemp();
  printLocalTime();
  delay(2000);
  tft.fillScreen(ILI9341_BLACK);
}

void setTimezone(String timezone){
  Serial.printf("  Setting Timezone to %s\n",timezone.c_str());
  setenv("TZ",timezone.c_str(),1);  //  Now adjust the TZ.  Clock settings are adjusted to show the new local time
  tzset();
}