/*   This sketch shows the WiFi event usage - Example from WiFi > WiFiClientEvents
     Complete details at https://RandomNerdTutorials.com/esp32-useful-wi-fi-functions-arduino/  */
/*
* WiFi Events

0  ARDUINO_EVENT_WIFI_READY               < ESP32 WiFi ready
1  ARDUINO_EVENT_WIFI_SCAN_DONE                < ESP32 finish scanning AP
2  ARDUINO_EVENT_WIFI_STA_START                < ESP32 station start
3  ARDUINO_EVENT_WIFI_STA_STOP                 < ESP32 station stop
4  ARDUINO_EVENT_WIFI_STA_CONNECTED            < ESP32 station connected to AP
5  ARDUINO_EVENT_WIFI_STA_DISCONNECTED         < ESP32 station disconnected from AP
6  ARDUINO_EVENT_WIFI_STA_AUTHMODE_CHANGE      < the auth mode of AP connected by ESP32 station changed
7  ARDUINO_EVENT_WIFI_STA_GOT_IP               < ESP32 station got IP from connected AP
8  ARDUINO_EVENT_WIFI_STA_LOST_IP              < ESP32 station lost IP and the IP is reset to 0
9  ARDUINO_EVENT_WPS_ER_SUCCESS       < ESP32 station wps succeeds in enrollee mode
10 ARDUINO_EVENT_WPS_ER_FAILED        < ESP32 station wps fails in enrollee mode
11 ARDUINO_EVENT_WPS_ER_TIMEOUT       < ESP32 station wps timeout in enrollee mode
12 ARDUINO_EVENT_WPS_ER_PIN           < ESP32 station wps pin code in enrollee mode
13 ARDUINO_EVENT_WIFI_AP_START                 < ESP32 soft-AP start
14 ARDUINO_EVENT_WIFI_AP_STOP                  < ESP32 soft-AP stop
15 ARDUINO_EVENT_WIFI_AP_STACONNECTED          < a station connected to ESP32 soft-AP
16 ARDUINO_EVENT_WIFI_AP_STADISCONNECTED       < a station disconnected from ESP32 soft-AP
17 ARDUINO_EVENT_WIFI_AP_STAIPASSIGNED         < ESP32 soft-AP assign an IP to a connected station
18 ARDUINO_EVENT_WIFI_AP_PROBEREQRECVED        < Receive probe request packet in soft-AP interface
19 ARDUINO_EVENT_WIFI_AP_GOT_IP6               < ESP32 ap interface v6IP addr is preferred
19 ARDUINO_EVENT_WIFI_STA_GOT_IP6              < ESP32 station interface v6IP addr is preferred
20 ARDUINO_EVENT_ETH_START                < ESP32 ethernet start
21 ARDUINO_EVENT_ETH_STOP                 < ESP32 ethernet stop
22 ARDUINO_EVENT_ETH_CONNECTED            < ESP32 ethernet phy link up
23 ARDUINO_EVENT_ETH_DISCONNECTED         < ESP32 ethernet phy link down
24 ARDUINO_EVENT_ETH_GOT_IP               < ESP32 ethernet got IP from connected AP
19 ARDUINO_EVENT_ETH_GOT_IP6              < ESP32 ethernet interface v6IP addr is preferred
25 ARDUINO_EVENT_MAX
*/
#include <OneWire.h>
#include <DallasTemperature.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
#include <WiFi.h>      // Load Wi-Fi library
WiFiServer server(80); // Set web server port number to 80
const char* ssid     = "Wokwi-GUEST";
const char* password = "";
String header; // Variable to store the HTTP request
String output26State = "off";// Auxiliar variables to store the current output state
String output27State = "off";// Auxiliar variables to store the current output state
float nastavljenaTemperatura = 25.0;
float prejsnjaRazlika1 = 0;
float prejsnjaRazlika2 = 0;
float prejsnjaTemperatura = 0;
int rele1 = LOW;
int rele2 = LOW;
const int pinTipkaPlus = 17;
const int pinTipkaMinus = 16;
const int pinSenzorjaTemperature = 5;
const int pinReleja1 = 26;
const int pinReleja2 = 27;
const int intervalBranjaTipke = 200;
unsigned long msecLst1 = 0;
unsigned long msecLst2 = 0;
unsigned long prejsnjiCasTipke = 0;


// Current time
unsigned long currentTime = millis();
// Previous time
unsigned long previousTime = 0; 
// Define timeout time in milliseconds (example: 2000ms = 2s)
const long timeoutTime = 2000;

void WiFiEvent(WiFiEvent_t event){
    Serial.printf("[WiFi-event] event: %d\n", event);

    switch (event) {
        case ARDUINO_EVENT_WIFI_READY: 
            Serial.println("WiFi interface ready");
            break;
        case ARDUINO_EVENT_WIFI_SCAN_DONE:
            Serial.println("Completed scan for access points");
            break;
        case ARDUINO_EVENT_WIFI_STA_START:
            Serial.println("WiFi client started");
            break;
        case ARDUINO_EVENT_WIFI_STA_STOP:
            Serial.println("WiFi clients stopped");
            break;
        case ARDUINO_EVENT_WIFI_STA_CONNECTED:
            Serial.println("Connected to access point");
            break;
        case ARDUINO_EVENT_WIFI_STA_DISCONNECTED:
            Serial.println("Disconnected from WiFi access point");
            break;
        case ARDUINO_EVENT_WIFI_STA_AUTHMODE_CHANGE:
            Serial.println("Authentication mode of access point has changed");
            break;
        case ARDUINO_EVENT_WIFI_STA_GOT_IP:
            Serial.print("Obtained IP address: ");
            Serial.println(WiFi.localIP());
            break;
        case ARDUINO_EVENT_WIFI_STA_LOST_IP:
            Serial.println("Lost IP address and IP address is reset to 0");
            break;
        case ARDUINO_EVENT_WPS_ER_SUCCESS:
            Serial.println("WiFi Protected Setup (WPS): succeeded in enrollee mode");
            break;
        case ARDUINO_EVENT_WPS_ER_FAILED:
            Serial.println("WiFi Protected Setup (WPS): failed in enrollee mode");
            break;
        case ARDUINO_EVENT_WPS_ER_TIMEOUT:
            Serial.println("WiFi Protected Setup (WPS): timeout in enrollee mode");
            break;
        case ARDUINO_EVENT_WPS_ER_PIN:
            Serial.println("WiFi Protected Setup (WPS): pin code in enrollee mode");
            break;
        case ARDUINO_EVENT_WIFI_AP_START:
            Serial.println("WiFi access point started");
            break;
        case ARDUINO_EVENT_WIFI_AP_STOP:
            Serial.println("WiFi access point  stopped");
            break;
        case ARDUINO_EVENT_WIFI_AP_STACONNECTED:
            Serial.println("Client connected");
            break;
        case ARDUINO_EVENT_WIFI_AP_STADISCONNECTED:
            Serial.println("Client disconnected");
            break;
        case ARDUINO_EVENT_WIFI_AP_STAIPASSIGNED:
            Serial.println("Assigned IP address to client");
            break;
        case ARDUINO_EVENT_WIFI_AP_PROBEREQRECVED:
            Serial.println("Received probe request");
            break;
        case ARDUINO_EVENT_WIFI_AP_GOT_IP6:
            Serial.println("AP IPv6 is preferred");
            break;
        case ARDUINO_EVENT_WIFI_STA_GOT_IP6:
            Serial.println("STA IPv6 is preferred");
            break;
        case ARDUINO_EVENT_ETH_GOT_IP6:
            Serial.println("Ethernet IPv6 is preferred");
            break;
        case ARDUINO_EVENT_ETH_START:
            Serial.println("Ethernet started");
            break;
        case ARDUINO_EVENT_ETH_STOP:
            Serial.println("Ethernet stopped");
            break;
        case ARDUINO_EVENT_ETH_CONNECTED:
            Serial.println("Ethernet connected");
            break;
        case ARDUINO_EVENT_ETH_DISCONNECTED:
            Serial.println("Ethernet disconnected");
            break;
        case ARDUINO_EVENT_ETH_GOT_IP:
            Serial.println("Obtained IP address");
            break;
        default: break;
    }}

void WiFiGotIP(WiFiEvent_t event, WiFiEventInfo_t info){
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(IPAddress(info.got_ip.ip_info.ip.addr));
}

OneWire oneWire(pinSenzorjaTemperature);
DallasTemperature senzorTemperature(&oneWire);

void setup(){
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }

  //display.display();
  display.print("Temperatura: ");
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,0);

  display.display();

  
  Serial.begin(115200);
  // Initialize the output variables as outputs
  pinMode(pinReleja1, OUTPUT);
  pinMode(pinReleja2, OUTPUT);
  pinMode(pinTipkaMinus, INPUT);
  pinMode(pinTipkaPlus, INPUT);
  // Set outputs to LOW
  digitalWrite(pinReleja1, LOW);
  digitalWrite(pinReleja2, LOW);



  // Connect to Wi-Fi network with SSID and password
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  // Print local IP address and start web server
  Serial.println("");
  Serial.println("WiFi connected.");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
  server.begin();
}

void loop(){
   senzorTemperature.requestTemperatures();
  //float temperatura = senzorTemperature.getTempCByIndex(0);
  float temperatura = 25; // Change to "senzorTemperature.getTempCByIndex(0);" due to simulation error
  // Branje tipk za nastavitev temperature
  unsigned long trenutniCas = millis();  // Preberi trenutni čas v milisekundah
    if (trenutniCas - prejsnjiCasTipke >= intervalBranjaTipke) {
    prejsnjiCasTipke = trenutniCas;  // Posodobi čas zadnjega branja tipke
    }
    if (digitalRead(pinTipkaPlus) == HIGH) {
      nastavljenaTemperatura += 0.2;  // Povečaj nastavljeno temperaturo za 0,2 stopinje Celzija
    }
    if (digitalRead(pinTipkaMinus) == HIGH) {
      nastavljenaTemperatura -= 0.2;  // Zmanjšaj nastavljeno temperaturo za 0,2 stopinje Celzija
    }
   // Prikaz temperature na zaslonu
  display.clearDisplay();
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0,5);
  display.setTextSize(2);
  display.print("Stanovanje");
  display.setTextSize(3);
  display.setCursor(2,25);
  display.print(temperatura);
  display.println(" C");
  display.setTextSize(2);
  display.setCursor(96,22);
  display.println("o");
  display.setCursor(12,50);
  display.print("Set:");
  display.print(nastavljenaTemperatura);
  display.print("C");
  display.display();

  
  WiFiClient client = server.available();   // Listen for incoming clients

  if (client) {                             // If a new client connects,
    currentTime = millis();
    previousTime = currentTime;
    Serial.println("New Client.");          // print a message out in the serial port
    String currentLine = "";                // make a String to hold incoming data from the client
    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
      currentTime = millis();
      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
        header += c;
        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("Connection: close");
            client.println();
            
            // turns the GPIOs on and off
            if (header.indexOf("GET /26/on") >= 0) {
              Serial.println("GPIO 26 on");
              output26State = "on";
              digitalWrite(pinReleja1, HIGH);
            } else if (header.indexOf("GET /26/off") >= 0) {
              Serial.println("GPIO 26 off");
              output26State = "off";
              digitalWrite(pinReleja1, LOW);
            } else if (header.indexOf("GET /27/on") >= 0) {
              Serial.println("GPIO 27 on");
              output27State = "on";
              digitalWrite(pinReleja2, HIGH);
            } else if (header.indexOf("GET /27/off") >= 0) {
              Serial.println("GPIO 27 off");
              output27State = "off";
              digitalWrite(pinReleja2, LOW);
            }
            
            // Display the HTML web page
            client.println("<!DOCTYPE html><html>");
            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
            client.println("<link rel=\"icon\" href=\"data:,\">");
            // CSS to style the on/off buttons 
            // Feel free to change the background-color and font-size attributes to fit your preferences
            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
            client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
            client.println(".button2 {background-color: #555555;}</style></head>");
            
            // Web Page Heading
            client.println("<body><h1>ESP32 Web Server</h1>");
            
            // Display current state, and ON/OFF buttons for GPIO 26  
            client.println("<p>GPIO 26 - State " + output26State + "</p>");
            // If the output26State is off, it displays the ON button       
            if (output26State=="off") {
              client.println("<p><a href=\"/26/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/26/off\"><button class=\"button button2\">OFF</button></a></p>");
            } 
               
            // Display current state, and ON/OFF buttons for GPIO 27  
            client.println("<p>GPIO 27 - State " + output27State + "</p>");
            // If the output27State is off, it displays the ON button       
            if (output27State=="off") {
              client.println("<p><a href=\"/27/on\"><button class=\"button\">ON</button></a></p>");
            } else {
              client.println("<p><a href=\"/27/off\"><button class=\"button button2\">OFF</button></a></p>");
            }
            client.println("</body></html>");
            
            // The HTTP response ends with another blank line
            client.println();

            client.println("<p>Temperatura: </p>");
            client.println(temperatura);
            client.println("<p>stopinj Celzija</p>");
            
            client.println("</body></html>");
            
            // 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
        }
      }
    }
    // Clear the header variable
    header = "";
    // Close the connection
    client.stop();
    Serial.println("Client disconnected.");
    Serial.println("");
  }

if (rele1 == LOW) {
// Preverjanje temperature in nadzor relejev
if (temperatura > (nastavljenaTemperatura + 0.2 )) {
unsigned long msec1 = millis();
float razlika1 = abs(1 / (temperatura -  nastavljenaTemperatura)) * 4000;
if ((razlika1 != prejsnjaRazlika1) || (temperatura != prejsnjaTemperatura)){
                Serial.print("Zakasnitev 1: ");
                Serial.println(razlika1); // Izpis vrednosti razlika v konzoli samo ob spremembi
                Serial.print("Temperatura: ");
                Serial.print(" °C");
                Serial.println(temperatura);
                
                prejsnjaRazlika1 = razlika1; // Posodobitev prejšnje vrednosti razlike
              prejsnjaTemperatura = temperatura;
            
            
            }   
                          rele2 = LOW; // Izklop releja 2
                 digitalWrite(pinReleja2, LOW); // Izklop releja 2
//float msecDelay = 1.0 / (razlika + 1.0);
// unsigned long casDoIzklopa = map(razlika, 0, 10, 1000, 5000);
    if (msec1 - msecLst1 >= razlika1){
            msecLst1 = msec1;
               rele1 = HIGH; // Vklop releja 1
                 digitalWrite(pinReleja1, HIGH); // Vklop releja 1
  }               
}
}else{
if (rele1 == HIGH) {
// Preverjanje temperature in nadzor relejev
if (temperatura > (nastavljenaTemperatura + 0.2 )) {
unsigned long msec1 = millis();
float razlika2 = abs(temperatura - nastavljenaTemperatura) * 1000;
if (razlika2 != prejsnjaRazlika2) {
                Serial.print("Čas vklopa 1: ");
                Serial.println(razlika2); // Izpis vrednosti razlika v konzoli samo ob spremembi
                prejsnjaRazlika2 = razlika2; // Posodobitev prejšnje vrednosti razlike
            }
  if (msec1 - msecLst1 >= razlika2){
           msecLst1 = msec1;
              rele1 = LOW; // Izklop releja 1
                 digitalWrite(pinReleja1, LOW); // Izklop releja 1
                
}
}
}
}

if (rele2 == LOW) {
// Preverjanje temperature in nadzor relejev
if (temperatura < (nastavljenaTemperatura + 0.2 )) {
unsigned long msec2 = millis();
float razlika1 = abs(1 / (temperatura -  nastavljenaTemperatura)) * 4000;
if (razlika1 != prejsnjaRazlika1) {
                Serial.print("Zakasnitev 2: ");
                Serial.println(razlika1);  // Izpis vrednosti razlika v konzoli samo ob spremembi
                Serial.print("Temperatura: ");
                Serial.print(" °C");
                Serial.println(temperatura);
                prejsnjaRazlika1 = razlika1; // Posodobitev prejšnje vrednosti razlike
            }
              rele1 = LOW; // Izklop releja 1
                 digitalWrite(pinReleja1, LOW); // Izklop releja 1
//float msecDelay = 1.0 / (razlika + 1.0);
// unsigned long casDoIzklopa = map(razlika, 0, 10, 1000, 5000);
    if (msec2 - msecLst2 >= razlika1){
            msecLst2 = msec2;
               rele2 = HIGH; // Vklop releja 1
                 digitalWrite(pinReleja2, HIGH); // Vklop releja 1
  }               
}
}else{
if (rele2 == HIGH) {
// Preverjanje temperature in nadzor relejev
if (temperatura < (nastavljenaTemperatura + 0.2 )) {
unsigned long msec2 = millis();
float razlika2 = abs(temperatura - nastavljenaTemperatura) * 1000;
if (razlika2 != prejsnjaRazlika2) {
                Serial.print("Čas vklopa 2: ");
                Serial.println(razlika2); // Izpis vrednosti razlika v konzoli samo ob spremembi
                prejsnjaRazlika2 = razlika2; // Posodobitev prejšnje vrednosti razlike
            }
  if (msec2 - msecLst2 >= razlika2){
           msecLst2 = msec2;
              rele2 = LOW; // Izklop releja 2
                 digitalWrite(pinReleja2, LOW); // Izklop releja 2
}
}
}
}
}