#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <ESP8266WiFi.h>

#include <NTPClient.h>
#include <Time.h>
#include <TimeLib.h>
#include <Timezone.h>
#include <WiFiUdp.h>
#include <String.h>

#include <WiFiClientSecure.h>
#include <ArduinoJson.h>
WiFiClient client;
LiquidCrystal_I2C lcd(0x20, 16, 2);
const char* ssid     = "NAZWA WIFI";
const char* password = "HASŁO WIFI";
String APIKEY = "API Z STRONY OPENWEATHERMAP.ORG";
String CityID = "ID MIASTA Z STRONY OPENWEATHERMAP.ORG"; //NALEZY ZMIENIĆ JESZCZE LINIJKE String location = "TWOJA MIEJSCOWOŚĆ";




#define NTP_OFFSET   60 * 60      // In seconds
#define NTP_INTERVAL 60 * 1000    // In miliseconds
#define NTP_ADDRESS  "uk.pool.ntp.org"  // change this to whatever pool is closest (see ntp.org)

// Set up the NTP UDP client
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP, NTP_ADDRESS, NTP_OFFSET, NTP_INTERVAL);


String date; //create the string for the date which will be printed on the lcd screen below
String t; // create the string for the time

const char * days[] = {"Niedziela", "Pon", "Wtorek", "Sroda", "Czwartek", "Piatek", "Sobota"} ;//my screen is 20 across to can't fit in Wednesday
const char * months[] = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"} ;



char servername[]="api.openweathermap.org";
String result;

int  counter = 10;

String weatherDescription ="";
String weatherLocation = "";
String Country;
float Temperature;
float Humidity;
float Pressure;


int show = -1;

void setup()
{
  int error;

  Serial.begin(115200);
   timeClient.begin();
  int cursorPosition=0;
  Serial.println("LCD...");


  while (!Serial)
    ;

  Serial.println("Dose: check for LCD");


  Wire.begin();
  Wire.beginTransmission(0x20);
  error = Wire.endTransmission();
  Serial.print("Error: ");
  Serial.print(error);

  if (error == 0) {
    Serial.println(": LCD found.");
    show = 0;
    lcd.begin(16, 2);
Serial.println("POLACZONO");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    lcd.setCursor(cursorPosition,2);
    lcd.print(".");
    cursorPosition++;
  }
  lcd.clear();
  lcd.setCursor(0, 0);
    lcd.print("  DZIEN DOBRY");
    lcd.setCursor(0, 1);
    lcd.print("LACZENIE Z BAZA");

  Serial.println("Connected");
  delay(1000);
  } else {
    Serial.println(": LCD not found.");
  }

}


void loop()
{
    if(counter == 10)
    {
      counter = 0;
      displayGettingData();
      delay(1000);
      getWeatherData();
      api.getChannelStatistics(CHANNEL_ID);
    }
    else
    {
      counter++;

      date = "";
    t = "";
    timeClient.update();
    unsigned long epochTime =  timeClient.getEpochTime();
    time_t local, utc;
    utc = epochTime;
    TimeChangeRule BST = {"BST", Last, Sun, Mar, 1, 60};
    TimeChangeRule GMT = {"GMT", Last, Sun, Oct, 2, 60};
    Timezone UK(BST, GMT);
    local = UK.toLocal(utc);

    if (day(local) < 10)
    date += "0";
    date += day(local);
    date += ".";
    if (month(local) - 1 < 10)
    date += "0";
    date += months[month(local) - 1];
    date += ".";
    date += year(local);

    t += days[weekday(local) - 1];
    t += " ";
    if (hour(local) < 10)
      t += "0";
    t += hour(local);
    t += ":";
    if (minute(local) < 10) // add a zero if minute is under 10
      t += "0";
    t += minute(local);

    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print(t);
    lcd.setCursor(0, 1);
    lcd.print(date);
    delay(10000);

      displayWeather(weatherLocation,weatherDescription);
      delay(3000);

      displayConditions(Temperature,Humidity,Pressure);
      delay(10000);


    }
}

void getWeatherData()
{
  if (client.connect(servername, 80)) {
    client.println("GET /data/2.5/weather?id="+CityID+"&units=metric&APPID="+APIKEY);
    client.println("Host: api.openweathermap.org");
    client.println("User-Agent: ArduinoWiFi/1.1");
    client.println("Connection: close");
    client.println();
  }
  else {
    Serial.println("connection failed");
    Serial.println();
  }

  while(client.connected() && !client.available()) delay(1);
  while (client.connected() || client.available()) {
    char c = client.read();
      result = result+c;
    }

  client.stop(); //stop client
  result.replace('[', ' ');
  result.replace(']', ' ');
  Serial.println(result);

char jsonArray [result.length()+1];
result.toCharArray(jsonArray,sizeof(jsonArray));
jsonArray[result.length() + 1] = '\0';

StaticJsonBuffer<1024> json_buf;
JsonObject &root = json_buf.parseObject(jsonArray);
if (!root.success())
{
  Serial.println("parseObject() failed");
}

String location = "TWOJA MIEJSCOWOŚĆ";
String country = root["sys"]["country"];
float temperature = root["main"]["temp"];
float humidity = root["main"]["humidity"];
String weather = root["weather"]["main"];
String description = root["weather"]["description"];
float pressure = root["main"]["pressure"];

weatherDescription = description;
weatherLocation = location;
Country = country;
Temperature = temperature;
Humidity = humidity;
Pressure = pressure;

}

void displayWeather(String location,String description)
{
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(location);
  lcd.print(", ");
  lcd.print(Country);
  lcd.setCursor(0,1);
  lcd.print(description);
}

void displayConditions(float Temperature,float Humidity, float Pressure)
{
  lcd.clear();
  lcd.print("T:");
 lcd.print(Temperature,1);
 lcd.print((char)223);
 lcd.print("C ");

 //Printing Humidity
 lcd.print(" W:");
 lcd.print(Humidity,0);
 lcd.print(" %");

 //Printing Pressure
 lcd.setCursor(0,1);
 lcd.print("C: ");
 lcd.print(Pressure,1);
 lcd.print(" hPa");

}

void displayGettingData()
{
  lcd.clear();
  lcd.print("  Pobieram dane");