//Configuração do BLynk
#define BLYNK_TEMPLATE_ID "TMPL2GfsofSaS"
#define BLYNK_TEMPLATE_NAME "testeiot"
#define BLYNK_AUTH_TOKEN "dSxsiu7zsSCoqw2iANicr-ncn9syZAt4"

//Bibliotecas para acessar display, wifi e blynk
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>


//Redireciona os prints da serial com informações do Blynk
#define BLYNK_PRINT Serial

//Autentica a conexão direcionando para o login do Blynk
char auth[] = BLYNK_AUTH_TOKEN;

//Credenciais de conexão para rede WiFi. SSID = nome da rede, Pass = senha da rede
//Senha nomeada como "" para redes abertas.
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

//LCD
const int LCD_ADDRESS = 0x27;
const int LCD_COLUMNS = 16;
const int LCD_ROWS = 2;

//BOTOES DE ESTADO
const int RED_BUTTON_PIN = 4;    
const int YELLOW_BUTTON_PIN = 16;
const int GREEN_BUTTON_PIN = 0;  

//LEDS DE ESTADO
const int RED_LED_PIN = 18;     
const int YELLOW_LED_PIN = 5;   
const int GREEN_LED_PIN = 19;   

LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

String staticMessage = "";
unsigned long startTime = 0;
bool isTimerStarted = false; //Controle para start do timer
int lastPressedButton = -1; // -1 nenhum botao pressionado

//CONTROLES DO TIMER
unsigned long elapsedSeconds = 0;
unsigned long hours = 0;
unsigned long minutes = 0;
unsigned long seconds = 0;

void scrollText(int row, String message, int delayTime, int lcdColumns) {
  message = String(message.length() + lcdColumns, ' ') + message + String(lcdColumns, ' ');
  for (int pos = 0; pos < message.length() - lcdColumns + 1; pos++) {
    lcd.setCursor(0, row);
    lcd.print(message.substring(pos, pos + lcdColumns));
    delay(delayTime);
  }
}

void displayMessage(String message) {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print(message);
}

void processTimerAndBlynk(int row) {
  
  elapsedSeconds = (millis() - startTime) / 1000;
  hours = elapsedSeconds / 3600;
  minutes = (elapsedSeconds % 3600) / 60;
  seconds = elapsedSeconds % 60;

  lcd.setCursor(0, row);
  
  String param = String();
  lcd.print("Tempo: ");
  param.concat(hours < 10 ? "0" : "");
  param.concat(hours);
  param.concat(":");
  param.concat(minutes < 10 ? "0" : "");
  param.concat(minutes);
  param.concat(":");
  param.concat(seconds < 10 ? "0" : "");
  param.concat(seconds);
  lcd.print(param);
  
  switch(lastPressedButton) {
    case RED_BUTTON_PIN :     //parada
      Blynk.virtualWrite(V4, 3);
      Blynk.virtualWrite(V0, param); break;
    case YELLOW_BUTTON_PIN :  //falha
      Blynk.virtualWrite(V4, 2);
      Blynk.virtualWrite(V1, param); break;
    default :                 //run
      Blynk.virtualWrite(V4, 1);
      Blynk.virtualWrite(V2, param); break;
  }

  


}

void setup() {
  pinMode(RED_BUTTON_PIN, INPUT_PULLUP);
  pinMode(YELLOW_BUTTON_PIN, INPUT_PULLUP);
  pinMode(GREEN_BUTTON_PIN, INPUT_PULLUP);
  
  pinMode(RED_LED_PIN, OUTPUT);
  pinMode(YELLOW_LED_PIN, OUTPUT);
  pinMode(GREEN_LED_PIN, OUTPUT);

  lcd.init();
  lcd.backlight();

  displayMessage("BEM VINDO AO OEE");
  lcd.setCursor(0, 1);
  lcd.print("MONITOR MQ");
  delay(2000);
  
  displayMessage("PRESS. BOTAO P/");  
  lcd.setCursor(0, 1);
  lcd.print("START DA SIMULAC.");
  
  //Inicializa e loga no blynk
  Blynk.begin(auth, ssid, pass); 
  
}

void loop() {
  
  if (digitalRead(RED_BUTTON_PIN) == LOW && lastPressedButton != RED_BUTTON_PIN) {
    staticMessage = "MQ EM PARADA";
    startTime = millis();
    isTimerStarted = true;
    digitalWrite(RED_LED_PIN, HIGH);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
    displayMessage(staticMessage);
    lastPressedButton = RED_BUTTON_PIN;
  } else if (digitalRead(YELLOW_BUTTON_PIN) == LOW && lastPressedButton != YELLOW_BUTTON_PIN) {
    staticMessage = "MQ EM FALHA";
    startTime = millis();
    isTimerStarted = true;
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, HIGH);
    digitalWrite(GREEN_LED_PIN, LOW);
    displayMessage(staticMessage);
    lastPressedButton = YELLOW_BUTTON_PIN;    
  } else if (digitalRead(GREEN_BUTTON_PIN) == LOW && lastPressedButton != GREEN_BUTTON_PIN) {
    staticMessage = "MQ EM PRODUCAO";
    startTime = millis();
    isTimerStarted = true;
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, HIGH);
    displayMessage(staticMessage);
    lastPressedButton = GREEN_BUTTON_PIN;
  }

  if (isTimerStarted) {
    processTimerAndBlynk(1);
  }

  delay(1000);
}