#include <string.h>
#include "driver/gpio.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"

#include "lwip/err.h"
#include "lwip/sys.h"


#include <LiquidCrystal.h>
#include <WiFi.h>
// #include <AsyncTCP.h>
#include <ESPAsyncWebServer.h>
#include <ElegantOTA.h>


LiquidCrystal lcd(21,19,18,5,4,2);

#if CONFIG_FREERTOS_UNICORE
static const BaseType_t app_cpu = 0;
#else
static const BaseType_t app_cpu = 1;
#endif

int led_pin = LED_BUILTIN;

unsigned long int lastDebounceTime = 0;
unsigned long int debounceDelay = 50;
bool buttonState = false;

void toggleLED(void *parameter) {
  while(1) {
    digitalWrite(led_pin, HIGH);
    vTaskDelay(500 / portTICK_PERIOD_MS);
    digitalWrite(led_pin, LOW);
    vTaskDelay(500 / portTICK_PERIOD_MS);
  }
}

void LCD(void *parameter) {
  while(1) {
  lcd.setCursor(0,1);
  lcd.noBlink();
  vTaskDelay(3000 / portTICK_PERIOD_MS);
  lcd.blink();
  vTaskDelay(3000 / portTICK_PERIOD_MS);
  
  // lcd.print(millis()/1000);
  // delay(2000);
  // lcd.clear();
  // delay(100);
  // lcd.print("Welcome to LPU");
  // delay(2000);
  // lcd.clear();
  // delay(100);
  // lcd.print("Chandra Shekhar");
  // delay(2000);
  // lcd.clear();
  // delay(100);
  
  for(int thisChar=0; thisChar<10; thisChar++)
  {
    lcd.print(thisChar);
    vTaskDelay(500 / portTICK_PERIOD_MS);

  }
  lcd.setCursor(20,1);
  lcd.autoscroll();

  for(int thisChar=0; thisChar<10; thisChar++)
  {
    lcd.print(thisChar);
    vTaskDelay(500 / portTICK_PERIOD_MS);
  }
  lcd.noAutoscroll();
  lcd.clear();
  vTaskDelay(500 / portTICK_PERIOD_MS);
  }
}

struct Button {
	const uint8_t PIN;
	uint32_t numberKeyPresses;
	bool pressed;
};

Button button1 = {25, 0, false};

void IRAM_ATTR isr() {
	button1.numberKeyPresses++;
	button1.pressed = true;
}

void setup() {
  lcd.begin(20,4);
  lcd.print("Hello World!!!");
  pinMode(led_pin, OUTPUT);

  
	Serial.begin(115200);
	pinMode(button1.PIN, INPUT_PULLUP);
	attachInterrupt(button1.PIN, isr, FALLING);

  // Task to run forever
  xTaskCreatePinnedToCore(  // Use xTaskCreate() in vanilla FreeRTOS
              toggleLED,    // Function to be called
              "Toggle LED", // Name of task
              2048,         // Stack size (bytes in ESP32, words in FreeRTOS)
              NULL,         // Parameter to pass to function
              1,            // Task priority (0 to configMAX_PRIORITIES - 1)
              NULL,         // Task handle
              app_cpu);     // Run on one core for demo purposes (ESP32 only)


pinMode(led_pin, OUTPUT);

  // Task to run forever
  xTaskCreatePinnedToCore(  // Use xTaskCreate() in vanilla FreeRTOS
              LCD,    // Function to be called
              "LCD", // Name of task
              3072,         // Stack size (bytes in ESP32, words in FreeRTOS)
              NULL,         // Parameter to pass to function
              1,            // Task priority (0 to configMAX_PRIORITIES - 1)
              NULL,         // Task handle
              app_cpu);     // Run on one core for demo purposes (ESP32 only)

  lastDebounceTime = millis();

}

void loop() {
  if (button1.pressed == true) {
	if (millis() - lastDebounceTime > debounceDelay) {
    lastDebounceTime = millis();
    // button1.numberKeyPresses;
    // button1.pressed = true;

		// Serial.println("Button has been pressed %u times\n", button1.numberKeyPresses);
		Serial.println("Button has been pressed \n");
    Serial.println(button1.numberKeyPresses);
		button1.pressed = false;
	}
  }
}