#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 customChar1[] = {
  B00100,
  B01111,
  B01100,
  B00100,
  B00110,
  B00110,
  B11110,
  B00100
};


byte customChar2[] = {
  B00111,
  B01000,
  B10000,
  B11110,
  B11110,
  B10000,
  B01000,
  B00111
};



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...");
  lcd.createChar(1, customChar1);
  lcd.createChar(2, customChar2);
  
  WiFi.begin(SSID, WIFI_password);
  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);
}

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 disclaimer = doc["disclaimer"].as<String>();
      String updateTime = 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 changed: ");
        Serial.print(USDrate);
        Serial.print(":");
        Serial.print(lastPriceUSD);

        delay(1500);
        return;
      


      }else if(USDrate.toDouble() > lastPriceUSD.toDouble()){
        

      }
       else{
        lcd.clear();
        lcd.print("USD: " + USDrate);
        lastPriceUSD = USDrate;
        lcd.setCursor(16, 0);
        lcd.write(1);
        lcd.setCursor(0,1);
        lcd.print("EUR: " + EURrate);
        lastPriceEUR = EURrate;
        lcd.setCursor(16, 1);
        lcd.write(2);
      }
      delay(2000);
    }

  }
}