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/* 
 -----------------------
 Ïîäêëþ÷àºìî ï³íè "ENC28J60 Module" äî Arduino Uno.
 VCC -   3.3V
 GND -    GND
 SCK - Pin 13
 SO  - Pin 12
 SI  - Pin 11
 CS  - Pin 10 Ìîæíà âèáðàòè áóäü-ÿêèé. 
  ------------------
 */

#include <EtherCard.h>  // Ïîäêëþ÷àºì ñêà÷àíó á³áë³îòåêó. https://yadi.sk/d/R57sVoglbhTRN

static byte mymac[] = { 0x74,0x69,0x69,0x2D,0x30,0x31 }; // присваиваем mac адрес
static byte myip[] = { 192, 168, 1, 222 };                    // ip в локальной сети
static byte subnet[] = { 255, 255, 255, 0 };  // присваиваем маску подсети
static byte gateway[] = { 192, 168, 1, 1 };   // присваиваем адрес шлюза по умолчанию
static byte hisport[] = { 80 }; // присваиваем порт для подключения


// Áóôåð, ÷èì á³ëüøå äàíèõ íà Web ñòîð³íö³, òèì á³ëüøå ïîòð³áíå çíà÷åííÿ áóôåðà.
byte Ethernet::buffer[1000];
BufferFiller bfill;

// Ìàñèâ çàä³ÿíèõ íîìåð³â ï³í³â Arduino, äëÿ êåðóâàííÿ 4 ðåëå.
int LedPins[] = {
  2,3,4,5};

// Ìàñèâ äëÿ ô³êñàö³¿ çì³í.
boolean PinStatus[] = {
  1,2,3,4};

//-------------

const char http_OK[] PROGMEM =
"HTTP/1.0 200 OK\r\n"
"Content-Type: text/html\r\n"
"Pragma: no-cache\r\n\r\n";

const char http_Found[] PROGMEM =
"HTTP/1.0 302 Found\r\n"
"Location: /\r\n\r\n";

const char http_Unauthorized[] PROGMEM =
"HTTP/1.0 401 Unauthorized\r\n"
"Content-Type: text/html\r\n\r\n"
"<h1>401 Unauthorized</h1>";

void homePage()
{
  bfill.emit_p(PSTR("$F"
    "<title>.:: TS Group ::.</title>" 
    "<br>"
    "<h1><p align = center>BARRIER Control Center</p></h1>"
    "<br>"
    "<h2><p align = center>Open the barrier</p></h2>"
    "<p align = center><button><h1><a href=\"?ArduinoPIN1=$F\">$F</a></h1></button></p>"
    "<br>"
    "<h2><p align = center>Stop the barrier</p></h2>"
    "<p align = center><button><h1><a href=\"?ArduinoPIN2=$F\">$F</a></h1></button></p>"  
    "<br>"
    "<h2><p align = center>Close the barrier</p></h2>"
    "<p align = center><button><h1><a href=\"?ArduinoPIN3=$F\">$F</a></h1></button></p>"
    "<br>"
    "<h2><p align = center>Auto</p></h2>"
    "<p align = center><button><h1><a href=\"?ArduinoPIN4=$F\">$F</a></h1></button></p>"),   

  http_OK,
  PinStatus[1]?PSTR("off"):PSTR("on"),
  PinStatus[1]?PSTR("<font color=\"green\"><b>OPENING</b></font>"):PSTR("<font color=\"red\">STAY</font>"),
  PinStatus[2]?PSTR("off"):PSTR("on"),
  PinStatus[2]?PSTR("<font color=\"green\"><b>STOPING</b></font>"):PSTR("<font color=\"red\">STAY</font>"),
  PinStatus[3]?PSTR("off"):PSTR("on"),
  PinStatus[3]?PSTR("<font color=\"green\"><b>CLOSING</b></font>"):PSTR("<font color=\"red\">STAY</font>"),
  PinStatus[4]?PSTR("off"):PSTR("on"),
  PinStatus[4]?PSTR("<font color=\"green\"><b>ENABLE</b></font>"):PSTR("<font color=\"red\">DISABLE</font>"));
}

//------------------------



void setup()
{
  Serial.begin(9600);

  // Ïî çàìîâ÷óâàííþ â á³áë³îòåö³ "ethercard" (CS-pin) = ¹ 8.
  // if (ether.begin(sizeof Ethernet::buffer, mymac) == 0).
  // and change it to: Çì³íþºìî (CS-pin) íà 10.
  // if (ether.begin(sizeof Ethernet::buffer, mymac, 10) == 0).

  if (ether.begin(sizeof Ethernet::buffer, mymac,10) == 0);

  if (!ether.dhcpSetup()); 

  // Âèâîäèìî â Serial ìîí³òîð IP àäðåñó, ÿêó íàì àâòîìàòè÷íî ïðèñâî¿â íàø Router. 
  // Äèíàì³÷íà IP àäðåñà íåçðó÷íà, áî ïåð³îäè÷íî çì³íþºòüñÿ. 
  // Íàì äîâåäåòüñÿ ÷àñòî ä³çíàâàòèñÿ, ÿêà àäðåñà íàøî¿ Web ñòîð³íêè.
  ether.printIp("My Router IP: ", ether.myip); // Âèâîäèìî â Serial ìîí³òîð IP àäðåñó, ÿêó íàì ïðèñâî¿â Router. 

  //Òàêîæ ìè ìîæåìî âñòàíîâèòè ñòàòè÷íó IP àäðåñó íàøî¿ ñòîð³íêè ³ çâåðòàòèñÿ äî Arduino ïî í³é 
  
    //ether.staticSetup(myip);

  ether.printIp("My SET IP: ", ether.myip); // Âèâîäèìî â Serial ìîí³òîð ñòàòè÷íó IP àäðåñó. 
  //-----

  for(int i = 0; i <= 4; i++)
  {
    pinMode(LedPins[i],OUTPUT); 
    digitalWrite (LedPins[i],HIGH);
    PinStatus[i]=false;
  }  
}

// --------------------------------------

void loop()
{

  word len = ether.packetReceive();   // check for ethernet packet / ïåðåâ³ðèòè ethernet ïàêåòè.
  word pos = ether.packetLoop(len);   // check for tcp packet / ïåðåâ³ðèòè TCP ïàêåòè.

  if (pos) {
    bfill = ether.tcpOffset();
    char *data = (char *) Ethernet::buffer + pos;
    if (strncmp("GET /", data, 5) != 0) {
      bfill.emit_p(http_Unauthorized);
    }
   
   
    else {

      data += 5;
      if (data[0] == ' ') {       
        homePage(); // Return home page ßêùî âèÿâëåíî çì³íè íà ñòîð³íö³, çàïóñêàºìî ôóíêö³þ.
        for (int i = 0; i <= 3; i++)digitalWrite(LedPins[i],!PinStatus[i+1]);
      }

      // "16" = ê³ëüê³ñòü ñèìâîë³â "?ArduinoPIN1=on ".
      else if (strncmp("?ArduinoPIN1=on ", data, 16) == 0) {
        PinStatus[1] = true;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN2=on ", data, 16) == 0) {
        PinStatus[2] = true;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN3=on ", data, 16) == 0) {
        PinStatus[3] = true;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN4=on ", data, 16) == 0) {
        PinStatus[4] = true;        
        bfill.emit_p(http_Found);
      
      }


      //------------------------------------------------------  


      else if (strncmp("?ArduinoPIN1=off ", data, 17) == 0) {
        PinStatus[1] = false;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN2=off ", data, 17) == 0) {
        PinStatus[2] = false;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN3=off ", data, 17) == 0) {
        PinStatus[3] = false;        
        bfill.emit_p(http_Found);
      }
      else if (strncmp("?ArduinoPIN4=off ", data, 17) == 0) {
        PinStatus[4] = false;        
        bfill.emit_p(http_Found);
      }
      


      //---------------------------


      else {
        // Page not found
        bfill.emit_p(http_Unauthorized);
      }
    }
    ether.httpServerReply(bfill.position());    // send http response
  }
}