/*
  ESP32 WiFi STA Mode
  http:://www.electronicwings.com
*/

#include <WiFi.h>
#include <NTPClient.h>
#include <WiFiUdp.h>
#include "esp_system.h"

// For example purpose
String formattedDate;

// Define NTP Client to get time
WiFiUDP ntpUDP;
NTPClient timeClient(ntpUDP);

// Timer conf
hw_timer_t * timer = NULL;
volatile SemaphoreHandle_t timerSemaphore;
portMUX_TYPE timerMux = portMUX_INITIALIZER_UNLOCKED;
volatile uint32_t isrCounter = 0;
volatile uint32_t lastIsrAt = 0;

void ARDUINO_ISR_ATTR onTimer(){
  // Increment the counter and set the time of ISR
  portENTER_CRITICAL_ISR(&timerMux);
  isrCounter = isrCounter + 1;
  lastIsrAt = millis();
  portEXIT_CRITICAL_ISR(&timerMux);
  // Give a semaphore that we can check in the loop
  xSemaphoreGiveFromISR(timerSemaphore, NULL);
  // It is safe to use digitalRead/Write here if you want to toggle an output
}

// Wifi conf
const char* ssid = "Wokwi-GUEST";                 /*Enter Your SSID*/
const char* password = ""; /*Enter Your Password*/
WiFiServer server(80); /* Instance of WiFiServer with port number 80 */
String request;

WiFiClient client;

void callback() {
  Serial.print("Callback... ");
}

void setup() {
  Serial.begin(9600);
  /*
  Serial.print("Connecting to: ");
  Serial.println(ssid);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    Serial.print(".");
    delay(100);
  }
  Serial.print("\n");
  Serial.print("Connected to Wi-Fi ");
  Serial.println(WiFi.SSID());
  delay(1000);
  server.begin(); 
  Serial.print("Connect to IP Address: ");
  Serial.print("http://");
  Serial.println(WiFi.localIP());
  /* Start the HTTP web Server */

  // Create semaphore to inform us when the timer has fired
  timerSemaphore = xSemaphoreCreateBinary();

  // Set timer frequency to 1Mhz
  timer = timerBegin(1000000, 80, true);

  // Attach onTimer function to our timer.
  timerAttachInterrupt(timer, &onTimer, true);

  // Set alarm to call onTimer function every second (value in microseconds).
  // Repeat the alarm (third parameter) with unlimited count = 0 (fourth parameter).
  timerAlarm(timer, 1000000, true, 0);


}


void loop() {


  formattedDate = timeClient.getFormattedTime();
  Serial.println(formattedDate);


  // If Timer has fired
  if (xSemaphoreTake(timerSemaphore, 0) == pdTRUE){
    uint32_t isrCount = 0, isrTime = 0;
    // Read the interrupt count and time
    portENTER_CRITICAL(&timerMux);
    isrCount = isrCounter;
    isrTime = lastIsrAt;
    portEXIT_CRITICAL(&timerMux);
    // Print it
    Serial.print("onTimer no. ");
    Serial.print(isrCount);
    Serial.print(" at ");
    Serial.print(isrTime);
    Serial.println(" ms");
  }
  // If button is pressed
  if (digitalRead(BTN_STOP_ALARM) == LOW) {
    // If timer is still running
    if (timer) {
      // Stop and free timer
      timerEnd(timer);
      timer = NULL;
    }
  }



/*
  // Extract date
  int splitT = formattedDate.indexOf("T");
  dayStamp = formattedDate.substring(0, splitT);
  Serial.print("DATE: ");
  Serial.println(dayStamp);
  // Extract time
  timeStamp = formattedDate.substring(splitT+1, formattedDate.length()-1);
  Serial.print("HOUR: ");
  Serial.println(timeStamp);
  */
  delay(1000);
/*
  client = server.available();
  if (!client) {
    return;
  }

  while (client.connected()) {
    if (client.available()) {
      char c = client.read();


      request += c;

      if (c == '\n') {
        String postres = client.readString();
        int indp = postres.indexOf("progo=")+6;
        Serial.println(postres);
        Serial.println(request);
       

       if (request.indexOf("POST /PROG") != -1) {
         Serial.println("go");
          programme =postres.substring(indp);
        }
        if (request.indexOf("GET /L1") != -1) {
          L1 = !L1;
        }
        if (request.indexOf("GET /L2") != -1) {
          L2 = !L2;
        }
        if (request.indexOf("GET /L3") != -1) {
          L3 = !L3;
        }
        if (request.indexOf("GET /L4") != -1) {
          L4 = !L4;
        }

        if (request.indexOf("GET /L5") != -1) {
          L5 = !L5;
        }
        if (request.indexOf("GET /L6") != -1) {
          L6 = !L6;
        }
        if (request.indexOf("GET /L7") != -1) {
          L7 = !L7;
        }
        if (request.indexOf("GET /L8") != -1) {
          L8 = !L8;
        }

        html();
        break;
      }
    }
  }

  delay(1);
  request = "";
  client.stop();
  */
}