#include <SoftwareSerial.h>

void displayTime(unsigned long);

const int LED1 = 7;
const int LED2 = 8;
unsigned long timer = 0;
int alert = 0;
int warning = 0;
int warning_delay = 5000;
int alert_treshold = 20000;
int data = -1;

SoftwareSerial BTSerial(10,11); // RX, TX

void setup() {
  BTSerial.begin(9600);
  BTSerial.println("Début du système d'alerte.");
  BTSerial.println("Appuyez sur 1 pour savoir le temps passé");
  pinMode(LED1,OUTPUT);
  pinMode(LED2,OUTPUT);
}

void loop() {
  data = BTSerial.read();
  timer = millis()%60000;
  if(data != -1)
  {
    if(data =='1')
    {
      displayTime(timer);
    }
    data = -1;
  }
  if(timer>=alert_treshold-warning_delay && !warning)
    {
      BTSerial.print("Attention ! ");
      displayTime(timer);
      digitalWrite(LED1,HIGH);
      warning = 1;
    }
  if(timer>=alert_treshold && !alert)
    {
      BTSerial.print("Alerte ! ");
      displayTime(timer);
      digitalWrite(LED2,HIGH);
      alert = 1;
    }
}

void displayTime(unsigned long t)
{
  float t_s = (float)t/1000;
  BTSerial.print("Temps passé depuis le début : ");
  BTSerial.print(t_s);
  BTSerial.println(" secondes");
}