#include <SPI.h>
#include <Ethernet.h>


byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; 
byte ip[] = { 
  192, 168, 1, 177 }; 
byte gateway[] = { 
  192, 168, 1, 1 };
byte subnet[] = { 
  255, 255, 255, 0 };
EthernetServer server(80);

String readString;
String stav="vypnuto";


void setup(){

  pinMode(6, OUTPUT); 

  Ethernet.begin(mac, ip, gateway, subnet);
  server.begin();
  Serial.begin(9600);
}
void loop() { 



  listenForEthernetClients();
}
void listenForEthernetClients() {
  EthernetClient client = server.available();
  if (client) {
    Serial.println("Got a client");
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();

        if (readString.length() < 100) {


          readString += c;
        }

        if (c == '\n') {

          currentLineIsBlank = true;
          if(readString.indexOf("on") >0)
          {
            digitalWrite(6, HIGH);   
            stav="zapnuto";
          }
          else if(readString.indexOf("off") >0)
          {
            digitalWrite(6, LOW);    
            stav="vypnuto";
          }
          else if(readString.indexOf("read") >0)
          {
            int sensorValue = analogRead(A0);
            stav=(String)sensorValue;
          }


          readString="";


        }
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println();
          // print the current readings, in HTML format:
          client.print("Stav LED: ");
          client.print(stav);
          client.println();


          break;
        } 

        else if (c != '\r') {
          currentLineIsBlank = false;
        }


      }
    }

    delay(1);

    client.stop();
  }
}