#include <YoutubeApi.h>
#include <ESP8266WiFi.h>
#include <WiFiClientSecure.h>
#include <ArduinoJson.h> 


//Outputs
#define MAX7219_Data_IN D7         //D4 of WeMos
#define MAX7219_Chip_Select  D6    //D3 of WeMos
#define MAX7219_Clock D5           //D2 of WeMos


int buzzer = D8;                  //D8 of WeMos


//Variabels
byte adr = 0x08;
byte num = 0x00;
int i = 0;
long subs = 0;
String thisString_prev;


//////////////////////////////////////////////////////////////////////////////////
//------- Replace the following! ------
char ssid[] = "";              // your network SSID (name)
char password[] = "";          // your network key
#define API_KEY ""
#define CHANNEL_ID ""          // makes up the url of channel


WiFiClientSecure client;
YoutubeApi api(API_KEY, client);
unsigned long api_mtbs = 10000; //mean time between api requests
unsigned long api_lasttime;   //last time api request has been done




void shift(byte send_to_address, byte send_this_data)
{
  digitalWrite(MAX7219_Chip_Select, LOW);
  shiftOut(MAX7219_Data_IN, MAX7219_Clock, MSBFIRST, send_to_address);
  shiftOut(MAX7219_Data_IN, MAX7219_Clock, MSBFIRST, send_this_data);
  digitalWrite(MAX7219_Chip_Select, HIGH);
}






void setup() {  
  Serial.begin(115200);
  delay(100);  
  pinMode(buzzer, OUTPUT);
  digitalWrite(buzzer, LOW);
  delay(100);
  
  //Define the pins as outputs and disable CS
  pinMode(MAX7219_Data_IN, OUTPUT);
  pinMode(MAX7219_Chip_Select, OUTPUT);
  pinMode(MAX7219_Clock, OUTPUT);
  digitalWrite(MAX7219_Chip_Select, HIGH);
  delay(200);
  //Setup of the 7seg module
  shift(0x0f, 0x00); //display test register - test mode off
  shift(0x0c, 0x01); //shutdown register - normal operation
  shift(0x0b, 0x07); //scan limit register - display digits 0 - 7
  shift(0x0a, 0x0f); //intensity register - max brightness
  shift(0x09, 0xff); //decode mode register - CodeB decode all digits


  
  // Set WiFi to station mode and disconnect from an AP if it was Previously
  // connected
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
  // Attempt to connect to Wifi network:
  Serial.print("Connecting Wifi: ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(500);
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  IPAddress ip = WiFi.localIP();
  Serial.println(ip);
  client.setInsecure();
}


void loop() {


  if (millis() - api_lasttime > api_mtbs)  {
    if(api.getChannelStatistics(CHANNEL_ID))
    {
      unsigned long Count = api.channelStats.subscriberCount;
      Serial.println(Count);
      String thisString = String(Count, DEC);


      if(thisString != thisString_prev)
      {
        digitalWrite(buzzer,200);
        delay(1000);
        digitalWrite(buzzer,LOW);       
      }
      
      thisString_prev = thisString;
            
      i =  thisString.length();//This variable will go character by cahracter and send the value to the 7 segment display
      if(i==8)
        {
          shift(0x0b, 0x07); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }        
        if(i==7)
        {
          shift(0x0b, 0x06); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==6)
        {
          shift(0x0b, 0x05); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==5)
        {
          shift(0x0b, 0x04); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==4)
        {
          shift(0x0b, 0x03); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==3)
        {
          shift(0x0b, 0x02); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==2)
        {
          shift(0x0b, 0x01); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        if(i==1)
        {
          shift(0x0b, 0x00); //scan limit register - display digits 0 thru 7
          adr=0x01;
        }
        i=i-1;


   
      
      
      while (i >= 0)
      {
        if(thisString[i] == '0')
        {
        num = 0x00;
        }
        if(thisString[i] == '1')
        {
        num = 0x01;
        }
        if(thisString[i] == '2')
        {
        num = 0x02;
        }
        if(thisString[i] == '3')
        {
        num = 0x03;
        }
        if(thisString[i] == '4')
        {
        num = 0x04;
        }
        if(thisString[i] == '5')
        {
        num = 0x05;
        }
        if(thisString[i] == '6')
        {
        num = 0x06;
        }
        if(thisString[i] == '7')
        {
        num = 0x07;
        }
        if(thisString[i] == '8')
        {
        num = 0x08;
        }
        if(thisString[i] == '9')
        {
        num = 0x09;
        }


           
        shift(adr, num);  


              
        adr=adr+0x01;
        i=i-1;         
      }
    }
    api_lasttime = millis();
  }
}