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#include <SD.h>

#include <TimedAction.h>

#include <Dhcp.h>
#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <EthernetServer.h>
#include <EthernetUdp.h>
#include <util.h>
#include <SPI.h>

#include <SoftwareSerial.h>
//Attach the serial display's RX line to digital pin 2
SoftwareSerial LCD(3,5); // pin 2 = TX, pin 3 = RX (unused)

TimedAction resetToActive = TimedAction (1000, resetMsg);


int curMin = 0;
int curHour = 0;
int curSec = 0;

TimedAction t_updateSec = TimedAction (998, updateSec);

// network configuration.  gateway and subnet are optional.

 // the media access control (ethernet hardware) address for the shield:
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xEB };
//the IP address for the shield:
byte ip[] = { 192, 168, 178, 42 };
// the router's gateway address:
byte gateway[] = { 192, 168, 178, 1 };
// the subnet:
byte subnet[] = { 255, 255, 0, 0 };

String curLine;
String curGet;
String completeRequest;

// telnet defaults to port 80
EthernetServer server = EthernetServer(80);

void setup()
{
  pinMode (8, OUTPUT);
  pinMode (4, OUTPUT);
  if(!SD.begin (4))
  {
    digitalWrite (8, HIGH);
    delay (500);
    digitalWrite (8, LOW);
    delay (500);
    digitalWrite (8, HIGH);
    delay (500);
    digitalWrite (8, LOW);
    delay (500);
  }
  // initialize the ethernet device
  Ethernet.begin(mac, ip, gateway, subnet);

  // start listening for clients
  server.begin();

  LCD.begin(9600); //set up serial port for 9600 baud
  delay(600); //wait for LCD to boot up

  LCD.write (0x7C);
  LCD.write (157);
  clearLCD();
  gotoPos (1);
  LCD.write ("ACTIVE");

  Serial.begin (9600);
}
void loop()
{
  resetToActive.check();
  t_updateSec.check();
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    resetToActive.disable();
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
       // Serial.print (c);
        curLine += c;
        completeRequest += c;
        if (c == '\n' && currentLineIsBlank) {
          // Let's parse
          // send a standard http response header
         // REDIRECTIION
         // client.println("HTTP/1.1 301 Moved Permanently");
         // client.println("Location: http://jan.apple-iv.net/vt");
         // client.stop();
         Serial.println (completeRequest.indexOf('Cache'));
          if (completeRequest.indexOf ('Cache'))
          {
            client.println ("HTTP/1.1 200 OK");
            client.println("Content-Type: text/html");
            client.println("Connection: close");
            client.println();
            client.println("<!DOCTYPE HTML>");
            client.println("<html>");
                      // add a meta refresh tag, so the browser pulls again every 5 seconds:
            //client.println("<meta http-equiv=\"refresh\" content=\"5\">");
            // output the value of each analog input pin

            if (curGet == "/")
            {
              client.print ("<h1>Index</h1>");
            }
            else if (curGet.substring (0, 6) == "/lamp/")
            {
              client.print ("Aktion: lamp -- Param: ");
              client.print (curGet.substring (6));
              String param = curGet.substring (6);
              if (param.charAt (0) == '1')
              {
                digitalWrite (8, HIGH);
                clearLCD();
                gotoPos (2);
                LCD.write ("ACTION: LAMP");
                gotoPos (4, 2);
                LCD.write ("PARAM: 1");
              }
              else
              {
                digitalWrite (8, LOW);
                clearLCD();
                gotoPos (2);
                LCD.write ("ACTION: LAMP");
                gotoPos (4, 2);
                LCD.write ("PARAM: 0");
              }

            }
            else if (curGet.substring (0, 6) == "/time/")
            {
              // /time/A/B/C
              // --4---67891111
              //           0123

              int h;
              int m;
              int s;

              h = (int)curGet.substring (6,7).charAt (0) - 65;
              m = (int)curGet.substring (8,9).charAt (0) - 65;
              s = (int)curGet.charAt (10) - 65;


              clearAndReset ();
              LCD.write ("UPDATE TIME: ");
              LCD.print ((int)h);
              LCD.write ("-");
              LCD.print ((int)m);
              LCD.write ("-");
              LCD.print ((int)s);

              curHour = h;
              curMin = m;
              curSec = s;

              client.print ((int)curGet.charAt (10) - 65);
              client.write (" ");
              client.print (curGet.charAt (10));
            }
            else if (curGet.substring (0, 8) == "/curtime")
            {
              clearLCD();
              gotoPos (2);
              LCD.write ("CURERENT TIME:");
              gotoPos (4,2);
              if (curHour < 10)
                LCD.write ("0");
              LCD.print (curHour);
              LCD.write (":");
              if (curMin < 10)
                LCD.write ("0");
              LCD.print (curMin);
              LCD.write (":");
              if (curSec < 10)
                LCD.write ("0");
              LCD.print (curSec);

              client.print ("OK");
            }
            else if (curGet.substring (0, 6) == "/test/")
            {
              File fh = SD.open ("/test.txt");
              client.print (fh);
              client.print (fh.size());
              while (fh.available())
                client.print (fh.read());

              fh.close();
              client.print ("WHATSUP");
            }
            else
              client.print ("<h1>Undefined</h1>");
            client.print("<br />");
            client.println("</html>");

            curLine = "";
            completeRequest = "";
          }

          break;
        }
        if (c == '\n') {
          if (curLine.substring (0, 3) == "GET")
          {
            curGet = curLine.substring (4, curLine.length() - 11);
          }
          curLine = "";
          // you're starting a new line
          currentLineIsBlank = true;
        }
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    gotoPos (1, 2);

    curLine = "";
    completeRequest = "";
    resetToActive.reset();
    resetToActive.enable();
  }
}

void clearLCD ()
{
  LCD.write (254);
  LCD.write (0x01);
  delay (10);
}

void resetPos ()
{
  LCD.write (254);
  LCD.write (128);
}

void clearAndReset ()
{
  clearLCD();
  resetPos();
}

void gotoPos (int num)
{
  gotoPos (num, 1);
}

void gotoPos (int num, int line)
{
  int base = 127;
  if (line == 2) base = 191;

  if (num < 1) num = 1;
  if (num > 16) num = 16;

  LCD.write (254);
  LCD.write (base + num);
  delay (10); // fix wrong chars
}

void resetMsg ()
{
  clearLCD();
  gotoPos (2);
  LCD.write ("LISTENING (80)");
  gotoPos (2, 2);
  LCD.write ("192.168.178.42");
  resetToActive.disable();
}

void updateSec ()
{
  curSec ++;

  if (curSec == 60)
  {
    curMin ++;
    curSec = 0;
    if (curMin == 60)
    {
      curHour ++;
      curMin = 0;
      if (curHour == 24)
        curHour = 0;
    }
  }

  if (curHour == 5 && curMin == 16)
  {
    digitalWrite (8, HIGH);
  }
  /*
  clearAndReset();

  LCD.print (curHour);
  LCD.write (":");
  LCD.print (curMin);
  LCD.write (":");
  LCD.print (curSec);
  */
}