#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include "secrets.h"

LiquidCrystal_I2C lcd(0x27, 16, 2);

const String url = "http://api.coindesk.com/v1/bpi/currentprice.json";

HTTPClient http;
String lastPriceUSD;
String lastPriceEUR;

byte customChar_1[] = {
  B00000,
  B00110,
  B01000,
  B00100,
  B00010,
  B01100,
  B00000,
  B00000
};

byte customChar_2[] = {
  B00000,
  B00110,
  B01000,
  B01110,
  B01000,
  B00110,
  B00000,
  B00000
};

byte customChar_3[] = {
  B00100,
  B01110,
  B10101,
  B00100,
  B00100,
  B00100,
  B00000,
  B00000
};

byte customChar_4[] = {
  B00000,
  B00100,
  B00100,
  B00100,
  B10101,
  B01110,
  B00100,
  B00000
};



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0,0);
  lcd.clear();
  lcd.print("Connecting WIFI...");

  WiFi.begin(SSID, WIFI_PASSWAO);

  while(WiFi.status() != WL_CONNECTED){
    delay(500);
  }

  Serial.print("Connected to SSID:");
  Serial.println(SSID);

  lcd.clear();
  lcd.print("Connected to");
  lcd.setCursor(0,1);
  lcd.print(SSID);
  delay(2000);

  lcd.createChar(1, customChar_1);
  lcd.createChar(2, customChar_2);
  lcd.createChar(3, customChar_3);
  lcd.createChar(4, customChar_4);

}

void loop() {
  if(WiFi.status() == WL_CONNECTED){
    Serial.println("Getting data from server...");

    http.begin(url);
    int httpCode = http.GET();
    Serial.print("HTTP Code");
    Serial.println(httpCode);

    if(httpCode > 0){
      DynamicJsonDocument doc(1024);
      DeserializationError error = deserializeJson(doc, http.getString());

      if(error){
        Serial.print(F("Deserialization Error:"));
        Serial.println(error.f_str());
        delay(2500);
        return;
      }
      Serial.print("Http status code: ");
      Serial.println(httpCode);

      String dislaimer = doc["dislaimer"].as<String>();
      String lastUpdated = doc["time"]["updated"].as<String>();

      JsonObject bpi = doc["bpi"];
      String USDrate = bpi["USD"]["rate_float"].as<String>();
      String EURrate = bpi["EUR"]["rate_float"].as<String>();

      if(USDrate == lastPriceUSD){
        Serial.print("Price hasnt chenged: ");
        Serial.print(USDrate);
        Serial.print(":");
        Serial.print(lastPriceUSD);

        delay(1500);
        return;
      }/*else if(EURrate == lastPriceEUR){
        Serial.print("Price hasnt chenged: ");
        Serial.print(EURrate);
        Serial.print(":");
        Serial.print(lastPriceEUR);

       delay(1500);
        return;
      }*/ else{
        lcd.clear();
        lcd.print("Time: " + lastUpdated);
        delay(520);
        lcd.clear();
        lcd.print("USD: " + USDrate);
        lcd.write(1);
        /*
        lcd.setCursor(0,1);
        lcd.print("EUR: " + EURrate);
        lcd.write(2);
*/
        //lastPriceEUR = EURrate;

        if(USDrate > lastPriceUSD){
        lcd.setCursor(0,1);
       lcd.print("USD rose ");
       lcd.write(3);
      }else{
        lcd.setCursor(0,1);
        lcd.print("USD fell ");
        lcd.write(4);
      }

        lastPriceUSD = USDrate;


      }
      delay(2000);
      
    }
  }
}