#include "Wire.h"
#include "LiquidCrystal_I2C.h"
#include <Keypad.h>
#include <Servo.h>

#define buzzer 8
#define trigPin 9
#define echoPin 10
#define tempsdarret 75
#define ouvert 0
#define ferme 90

Servo monServomoteur;

long duration;
int distance, initialDistance, currentDistance, i;
int screenOffMsg =0;
String password="1876";
String Mdp="4253";
String tempPassword;
boolean activated = false; // État de l'alarme
boolean isActivated;
boolean activateAlarm = false;
boolean alarmActivated = false;
boolean enteredPassword; // État du mot de passe saisi pour arrêter l'alarme
boolean passChangeMode = false;
boolean passChanged = false;
LiquidCrystal_I2C lcd(0x27,16,2); // définit le type d'écran lcd 16 x 2

const byte ROWS = 4; //quatre rangs
const byte COLS = 4; //quatre colonnes
char keypressed;
//définir les symboles sur les boutons du clavier.
char keyMap[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'*','0','#','D'}
};
byte rowPins[ROWS] = {14, 15, 16, 17}; //Brochage des rangées du clavier
byte colPins[COLS] = {18, 19, A0, A1}; //Brochage des colonnes du clavier

Keypad myKeypad = Keypad( makeKeymap(keyMap), rowPins, colPins, ROWS, COLS); 

void setup() { 
  lcd.init(); // initialisation de l'afficheur
  lcd.backlight();
  pinMode(buzzer, OUTPUT); // Définir le buzzer comme une sortie
  pinMode(trigPin, OUTPUT); // Définit la trigPin comme une sortie
  pinMode(echoPin, INPUT); // Définit l'echoPin comme une entrée
  monServomoteur.attach(36);
  debut();
}

void loop() {
  if (activateAlarm) {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print("L'alarme sera");
    lcd.setCursor(0,1);
    lcd.print("activee dans");
   
    int countdown = 9; // Compte à rebours de 9 secondes avant l'activation de l'alarme
    while (countdown != 0) {
      lcd.setCursor(13,1);
      lcd.print(countdown);
      countdown--;
      tone(buzzer, 700, 100);
      delay(1000);
    }
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print(" *** ALARME *** ");
    lcd.setCursor(0,1);
    lcd.print("Alarme activee");
    tone(buzzer, 2000, 600);
    initialDistance = getDistance();
    activateAlarm = false;
    alarmActivated = true;
  }

  if (alarmActivated == true){
      currentDistance = getDistance() + 10;
      if ( currentDistance < initialDistance) {
        tone(buzzer, 1000); // Envoyer un signal sonore de 1KHz 
        lcd.clear();
        enterPassword();
      }
    }

  if (!alarmActivated) {
    if (screenOffMsg == 0 ){
      lcd.clear();
      lcd.setCursor(0,0);
      lcd.print("A - Activer");
      lcd.setCursor(0,1);
      lcd.print("B - Carte SD");
      screenOffMsg = 1;
    }
    keypressed = myKeypad.getKey();
     if (keypressed =='A'){        //Si vous appuyez sur A, vous activez l'alarme
      tone(buzzer, 1000, 200);
      activateAlarm = true;            
    }

    else if (keypressed =='B') {
      lcd.clear();
      int i=5;
      tone(buzzer, 2000, 100);
      tempPassword = "";
      lcd.setCursor(0,0);
      lcd.print("Entrez le code");
      lcd.setCursor(0,1);
      lcd.print("Code>");
      passChangeMode = true;
      passChanged = true;   
      while(passChanged) {      
      keypressed = myKeypad.getKey();
      if (keypressed != NO_KEY){
        if (keypressed == '0' || keypressed == '1' || keypressed == '2' || keypressed == '3' ||
            keypressed == '4' || keypressed == '5' || keypressed == '6' || keypressed == '7' ||
            keypressed == '8' || keypressed == '9' ) {
         tempPassword += keypressed;
         lcd.setCursor(i,1);
         lcd.print("*");
         i++;
         tone(buzzer, 2000, 100);
        }
      }
      if (i > 9 || keypressed == '#') {
        tempPassword = "";
        i=5;
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print("Entrez le code");
        lcd.setCursor(0,1);
        lcd.print("Code>"); 
      }
      if ( keypressed == '*') {
        i=1;
        tone(buzzer, 2000, 100);
        if (Mdp == tempPassword) {
          monServomoteur.write(ouvert);
          lcd.clear();
          lcd.setCursor(0,0);
          lcd.print("Blocage de la");
          lcd.setCursor(0,1);
          lcd.print("carte SD dans ");
          int countdown = 20; // Compte à rebours de 20 secondes avant la fermeture de la boite à carte SD
          while (countdown != 0) {
            lcd.setCursor(14,1);
            lcd.print(countdown);
            countdown--;
            tone(buzzer, 700, 100);
            
            if (countdown <= 8) {
            lcd.setCursor(15,1);
            lcd.print(" ");
            }
            delay(1000);
          }
          tone(buzzer, 2000, 1000);
          monServomoteur.write(ferme);
          Mdp = tempPassword;
          passChangeMode = false;
          passChanged = false;
          screenOffMsg = 0;
        }
        
      }
    }
   }
 }
}

void enterPassword() {
  int k=5;
  tempPassword = "";
  activated = true;
  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print(" *** ALARME *** ");
  lcd.setCursor(0,1);
  lcd.print("Code>");
      while(activated) {
      keypressed = myKeypad.getKey();
      if (keypressed != NO_KEY){
        if (keypressed == '0' || keypressed == '1' || keypressed == '2' || keypressed == '3' ||
            keypressed == '4' || keypressed == '5' || keypressed == '6' || keypressed == '7' ||
            keypressed == '8' || keypressed == '9' ) {
          tempPassword += keypressed;
          lcd.setCursor(k,1);
          lcd.print("*");
          k++;
        }
      }
      if (k > 9 || keypressed == '#') {
        tempPassword = "";
        k=5;
        lcd.clear();
        lcd.setCursor(0,0);
        lcd.print(" *** ALARME *** ");
        lcd.setCursor(0,1);
        lcd.print("Code>");
      }
      if ( keypressed == '*') {
        if ( tempPassword == password ) {
          activated = false;
          alarmActivated = false;
          noTone(buzzer);
          screenOffMsg = 0; 
        }
        else if (tempPassword != password) {
          lcd.setCursor(0,1);
          lcd.print("FAUX! Reesayez");
          delay(2000);
          lcd.clear();
          lcd.setCursor(0,0);
          lcd.print(" *** ALARME *** ");
          lcd.setCursor(0,1);
          lcd.print("Code>");
        }
      }    
    }
}
void debut() {
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("A");
  delay(400);
  lcd.clear();
  delay(400);
  lcd.setCursor(0, 0);
  lcd.print("A");
  delay(400);
  lcd.clear();
  delay(500);
  lcd.setCursor(0, 0);
  lcd.print("A");
  delay(tempsdarret);
  lcd.setCursor(1, 0);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(2, 0);
  lcd.print("D");
  delay(tempsdarret);
  lcd.setCursor(3, 0);
  lcd.print("U");
  delay(tempsdarret);
  lcd.setCursor(4, 0);
  lcd.print("I");
  delay(tempsdarret);
  lcd.setCursor(5, 0);
  lcd.print("N");
  delay(tempsdarret);
  lcd.setCursor(6, 0);
  lcd.print("O");
  delay(tempsdarret);
  lcd.setCursor(8, 0);
  lcd.print("S");
  delay(tempsdarret);
  lcd.setCursor(9, 0);
  lcd.print("E");
  delay(tempsdarret);
  lcd.setCursor(10, 0);
  lcd.print("C");
  delay(tempsdarret);
  lcd.setCursor(11, 0);
  lcd.print("U");
  delay(tempsdarret);
  lcd.setCursor(12, 0);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(13, 0);
  lcd.print("I");
  delay(tempsdarret);
  lcd.setCursor(14, 0);
  lcd.print("T");
  delay(tempsdarret);
  lcd.setCursor(15, 0);
  lcd.print("Y");
  delay(tempsdarret);
  lcd.setCursor(0, 1);
  lcd.print("C");
  delay(tempsdarret);
  lcd.setCursor(1, 1);
  lcd.print("O");
  delay(tempsdarret);
  lcd.setCursor(2, 1);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(3, 1);
  lcd.print("P");
  delay(tempsdarret);
  lcd.setCursor(4, 1);
  lcd.print("O");
  delay(tempsdarret);
  lcd.setCursor(5, 1);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(6, 1);
  lcd.print("A");
  delay(tempsdarret);
  lcd.setCursor(7, 1);
  lcd.print("T");
  delay(tempsdarret);
  lcd.setCursor(8, 1);
  lcd.print("I");
  delay(tempsdarret);
  lcd.setCursor(9, 1);
  lcd.print("O");
  delay(tempsdarret);
  lcd.setCursor(10, 1);
  lcd.print("N");
  delay(tempsdarret);
  lcd.setCursor(12, 1);
  lcd.print("V");
  delay(tempsdarret);
  lcd.setCursor(13, 1);
  lcd.print("1");
  delay(tempsdarret);
  lcd.setCursor(14, 1);
  lcd.print(".");
  delay(tempsdarret);
  lcd.setCursor(15, 1);
  lcd.print("0");
  delay(1000);
  tone(buzzer, 1000);
  delay(250);
  noTone(buzzer);
  delay(250);
  tone(buzzer, 1000);
  delay(250);
  noTone(buzzer);
  delay(250);
  tone(buzzer, 1000);
  delay(250);
  noTone(buzzer);
  lcd.clear();
  lcd.setCursor(2, 0);
  lcd.print("L");
  delay(400);
  lcd.clear();
  delay(400);
  lcd.setCursor(2, 0);
  lcd.print("L");
  delay(400);
  lcd.clear();
  delay(500);
  lcd.setCursor(2, 0);
  lcd.print("L");
  delay(tempsdarret);
  lcd.setCursor(3, 0);
  lcd.print("A");
  delay(tempsdarret);
  lcd.setCursor(4, 0);
  lcd.print("N");
  delay(tempsdarret);
  lcd.setCursor(5, 0);
  lcd.print("C");
  delay(tempsdarret);
  lcd.setCursor(6, 0);
  lcd.print("E");
  delay(tempsdarret);
  lcd.setCursor(7, 0);
  lcd.print("M");
  delay(tempsdarret);
  lcd.setCursor(8, 0);
  lcd.print("E");
  delay(tempsdarret);
  lcd.setCursor(9, 0);
  lcd.print("N");
  delay(tempsdarret);
  lcd.setCursor(10, 0);
  lcd.print("T");
  delay(tempsdarret);
  lcd.setCursor(12, 0);
  lcd.print("D");
  delay(tempsdarret);
  lcd.setCursor(13, 0);
  lcd.print("E");
  lcd.setCursor(0, 1);
  lcd.print("A");
  delay(tempsdarret);
  lcd.setCursor(1, 1);
  lcd.print("L");
  delay(tempsdarret);
  lcd.setCursor(2, 1);
  lcd.print("A");
  delay(tempsdarret);
  lcd.setCursor(3, 1);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(4, 1);
  lcd.print("M");
  delay(tempsdarret);
  lcd.setCursor(5, 1);
  lcd.print("Y");
  delay(tempsdarret);
  lcd.setCursor(7, 1);
  lcd.print("S");
  delay(tempsdarret);
  lcd.setCursor(8, 1);
  lcd.print("E");
  delay(tempsdarret);
  lcd.setCursor(9, 1);
  lcd.print("C");
  delay(tempsdarret);
  lcd.setCursor(10, 1);
  lcd.print("U");
  delay(tempsdarret);
  lcd.setCursor(11, 1);
  lcd.print("R");
  delay(tempsdarret);
  lcd.setCursor(12, 1);
  lcd.print("I");
  delay(tempsdarret);
  lcd.setCursor(13, 1);
  lcd.print("T");
  delay(tempsdarret);
  lcd.setCursor(14, 1);
  lcd.print("Y");
  delay(3000);
}
// Fonction personnalisée pour le capteur à ultrasons
long getDistance(){
  //int i=10;
  
  //while( i<=10 ) {
  // Efface le trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);

  // Met la trigPin sur l'état HIGH pendant 10 micro secondes
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Lit l'echoPin, renvoie le temps de parcours de l'onde sonore en microsecondes.
  duration = pulseIn(echoPin, HIGH);

  // Calcul de la distance
  distance = duration*0.034/2;
  //sumDistance += distance;
  //}
  //int averageDistance= sumDistance/10;
  return distance;

}