/*
 * worked on: arduino1.8.3 - arduino nano 328
 * libs:
 * https://github.com/avishorp/TM1637
 * https://github.com/UIPEthernet/UIPEthernet
 * 
 */
#define l 3
#define r 4
#define CLK 5
#define DIO 6
#include <UIPEthernet.h>
#include <TM1637Display.h>

EthernetServer server = EthernetServer(1234);
TM1637Display display(CLK, DIO);

unsigned char step = 0;
const uint8_t empty[] = {0x00,0x00,0x00,0x00};
const uint8_t connected[] = {
  SEG_D | SEG_E | SEG_G,        //c
  SEG_C | SEG_D | SEG_E | SEG_G,//o
  SEG_C | SEG_E | SEG_G,        //n
  SEG_C | SEG_E | SEG_G         //n
  };

void setup() {
  display.setBrightness(0, false); // Turn off
  display.setSegments(empty);
  
  Serial.begin(9600);

  uint8_t mac[6] = {0x24, 0xb6, 0xfd, 0x20, 0x69, 0xed };
  Ethernet.begin(mac);

  pinMode(l, INPUT);
  pinMode(r, INPUT);

  Serial.println(Ethernet.localIP());
  server.begin();
}

void loop() {
  size_t size;
  Serial.println("Listening port 1234 ");
  Serial.println(Ethernet.localIP());
  if (EthernetClient client = server.available()) {
      client.write('h');
      Serial.println("Connected");
      bool leftp = digitalRead(l) == HIGH;
      bool rightp = digitalRead(r) == HIGH;
      bool conn = true;
      while(client.connected()) {
        if(conn) {
          conn = false;
          display.setBrightness(2, true);
          display.setSegments(connected);
        }
        if(client.available() > 0) {
          char data = client.read();
          Serial.print(data);
          if(data == 'd') {
           Serial.println("Disconnect");
           break; 
          }
        }
        
          
          if(digitalRead(l) == HIGH) {
            if(!leftp) {
              leftp = true;
              client.write('l');
              client.write('<');
              client.flush();
            }
          } else if(leftp) {
            leftp = false;
            client.write('l'); 
            client.write('>'); 
            client.flush();
          }

         if(digitalRead(r) == HIGH) {
            if(!rightp) {
              rightp = true;
              client.write('r'); 
              client.write('<'); 
              client.flush();
            }
          } else if(rightp) {
            rightp = false;
            client.write('r'); 
            client.write('>'); 
            client.flush();
          }
          delay(2);
          //Serial.print(digitalRead(l));
          //Serial.println(digitalRead(r));
      }
      client.stop();
    }
    delay(1000);
    if(digitalRead(l) == HIGH && digitalRead(r) == HIGH) { // both pressed
      display.setBrightness(7, true); // Turn on
      display.showNumberDec(Ethernet.localIP()[step++], step == 0);//to make the first byte have leading zeros
      step%=4;
    } else {
      display.setBrightness(0, false); // Turn off
      display.setSegments(empty);
      step = 0;
    }
}