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#include <SPI.h>
#include <WiFiNINA.h>
#include "DHT.h"
#include "arduino_secrets.h" 

//////////////////////////////////////////////////////////////////////////////////////////////////////////
//Webserver

///////please enter your sensitive data in the Secret tab/arduino_secrets.h
char ssid[] = SECRET_SSID;        // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                 // your network key Index number (needed only for WEP)
WiFiClient client;  // Initialize the Wifi client library
int status = WL_IDLE_STATUS;
WiFiServer server(80);
char meinserver[] = "lenk-haibach.de";  // server address:

//////////////////////////////////////////////////////////////////////////////////////////////////////////
//DHT22

int led =  6;
#define DHTPIN 8 
#define DHTTYPE DHT22 
DHT dht(DHTPIN, DHTTYPE);

float hkf = 0;
float hkt = 0;

//////////////////////////////////////////////////////////////////////////////////////////////////////////
//DCF77
int signalPin = 5;

char dcf77Signal;
char buffer;

unsigned long nowTime, lastTime;
int diffTime;

byte impulsLevel; // Impulsdauer 100ms => logisch 0, 200 ms => logisch 1
byte Impuls[59]; // eingehende Impulse
byte impulsWert[8] = {1, 2, 4, 8, 10, 20, 40, 80}; //Impulswertigkeit für Level logisch 1
byte impulsZaehler = 0; //Anzahl eingehende Impulse

byte dcf77Stunde = 0;
byte dcf77Minute = 0;

//////////////////////////////////////////////////////////////////////////////////////////////////////////

unsigned long lastConnectionTime = 0;            // last time you connected to the server, in milliseconds
const unsigned long postingInterval = 600L * 1000L; // delay between updates, in milliseconds

//////////////////////////////////////////////////////////////////////////////////////////////////////////

void setup() {
  Serial.begin(9600);      // initialize serial communication
  pinMode(led, OUTPUT);      // set the LED pin mode
  pinMode(signalPin, INPUT);
  dht.begin();

  // check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE) {
    Serial.println("Kommunikation mit WiFi-Modul fehlgeschlagen!");
    // don't continue
    while (true);
  }

  // attempt to connect to Wifi network:
  while (status != WL_CONNECTED) {
    Serial.print("Versuche, eine Verbindung zum Netzwerk mit diesem Namen herzustellen:");
    Serial.println(ssid);                   // print the network name (SSID);

    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);
    // wait 10 seconds for connection:
    delay(10000);
  }
  server.begin();                           // start the web server on port 80
  Serial.println("Server gestartet");
}


void loop() {
  dcf77Signal = digitalRead(signalPin);
  if (dcf77Signal != buffer)
  {
    nowTime = millis();
    delay(5); //Wartezeit bis eingeschwungener Zustand
    diffTime = nowTime - lastTime;
    lastTime = nowTime;
    if (diffTime < 150) impulsLevel = 0;
    else if (diffTime < 250) impulsLevel = 1;
    else if (diffTime > 1000)
    {
      if (impulsZaehler == 59 || impulsZaehler == 60) dekodiereZeit();
      impulsZaehler = 0;
    }
    if (dcf77Signal == 0) // Abfrage auf "1", wenn das invertierte Signal verwendet wird
    {
      Impuls[impulsZaehler] = impulsLevel;
      impulsZaehler++;
    }
   buffer = dcf77Signal;
  neuerserver();
  if (millis() - lastConnectionTime > postingInterval) {
   DHTSensor();
   neuerclient();
  }
}
}


void neuerserver() {
  WiFiClient client = server.available();   // listen for incoming clients

  if (client) {                             // if you get a client,
    Serial.println("Neuer client");           // print a message out the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected()) {            // loop while the client's connected
      if (client.available()) {             // if there's bytes to read from the client,
        char c = client.read();             // read a byte, then
        Serial.write(c);                    // print it out the serial monitor
        if (c == '\n') {                    // if the byte is a newline character

          // if the current line is blank, you got two newline characters in a row.
          // that's the end of the client HTTP request, so send a response:
          if (currentLine.length() == 0) {
            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
            // and a content-type so the client knows what's coming, then a blank line:
            client.println("HTTP/1.1 200 OK");
            client.println("Content-type:text/html");
            client.println();

            // the content of the HTTP response follows the header:
            client.print("Click <a href=\"/H\">here</a> turn the LED on pin 9 on<br>");
            client.print("Click <a href=\"/L\">here</a> turn the LED on pin 9 off<br>");

            // The HTTP response ends with another blank line:
            client.println();
            // break out of the while loop:
            break;
          } else {    // if you got a newline, then clear currentLine:
            currentLine = "";
          }
        } else if (c != '\r') {  // if you got anything else but a carriage return character,
          currentLine += c;      // add it to the end of the currentLine
        }

        // Check to see if the client request was "GET /H" or "GET /L":
        if (currentLine.endsWith("GET /H")) {
          digitalWrite(led, HIGH);               // GET /H turns the LED on
        }
        if (currentLine.endsWith("GET /L")) {
          digitalWrite(led, LOW);                // GET /L turns the LED off
        }
      }
    }
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
}

void neuerclient() {
  while (client.available()) {
    char c = client.read();
    Serial.write(c);
  }
    // close any connection before send a new request.
  // This will free the socket on the Nina module
  client.stop();

  // if there's a successful connection:
  if (client.connect(meinserver, 80)) {
    Serial.println("verbinde...");
    // send the HTTP PUT request:
    client.print("GET /getandsave.php?hkt=");
    client.print(hkt);
    client.print("&hkf=");
    client.print(hkf);
    client.println(" HTTP/1.1");
    client.println("Host:www.lenk-haibach.de");
    client.println("User-Agent: ArduinoWiFi/1.1");
    client.println("Connection: close");
    client.println();

    // note the time that the connection was made:
    lastConnectionTime = millis();
  } else {
    // if you couldn't make a connection:
    Serial.println("Verbindung fehlgeschlagen");
  }
}

void DHTSensor() {
  hkf = dht.readHumidity();
  hkt = dht.readTemperature();
  delay(2000);
  Serial.println(F("DHT Test!"));
  if (isnan(hkf) || isnan(hkt)) {
    Serial.println(F("Fehler beim Lesen des DHT-Sensors!"));
    return;
  }
  Serial.print(F("Luftfeuchte: "));
  Serial.print(hkf);
  Serial.print(F("%  Temperatur: "));
  Serial.print(hkt);
  Serial.println(F("°C "));
}

void dekodiereZeit(){
  bool dateTimeOk = true;
  byte paritaetStunde = 0;
  byte paritaetMinute = 0;

  dcf77Stunde = 0;
  dcf77Minute = 0;

  //Ueberpruefen der Stundenparitaet
  for (byte i = 29; i < 35; i++) paritaetStunde ^= Impuls[i];

  if (Impuls[35] != paritaetStunde) dateTimeOk = false;

  //Ueberpruefen der Minutenparitaet
  for (byte i = 21; i < 28; i++) paritaetMinute ^= Impuls[i];
  if (Impuls[28] != paritaetMinute) dateTimeOk = false;

  //Zuweisen der Impulswertigkeit
  for (byte i = 29; i < 35; i++) (Impuls[i] == 1 ? dcf77Stunde += impulsWert[i - 29] : 0);
  for (byte i = 21; i < 28; i++) (Impuls[i] == 1 ? dcf77Minute += impulsWert[i - 21] : 0);

  //Ueberpruefen des Wertebereiches
  if (dcf77Stunde > 23 || dcf77Minute > 59) dateTimeOk = false;

  if (dateTimeOk)
  {
    Serial.print(dcf77Stunde);
    Serial.print(" : ");
    Serial.println(dcf77Minute);
  }
}