#include <Keypad.h>
String password;
String passwordlog = "HTO!";
unsigned long passwordTimerStart = 0;
bool Serialpasswordflag = false;
bool passwordflagtrue = false;
bool passwordflagfalse = false;
bool timerActive = false;
float lux;
// Настройка клавиатуры
const byte ROWS = 4; // 4 строки
const byte COLS = 4; // 4 столбца
char keys[ROWS][COLS] = {
  {'1','2','3','H'},
  {'4','5','6','T'},
  {'7','8','9','O'},
  {'*','0','!','='}
}; 
#define SPEAKER_PIN 23
int distance;
#define ECHO_PIN 14
#define TRIG_PIN 12
byte rowPins[ROWS] = {19, 21, 17, 16}; 
byte colPins[COLS] = {15, 2, 0, 4}; 
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);


#define PIR 13
int val = 0; 
bool flagPIR = false;


#define LDR_PIN 34
#define pinG 26
#define pinR 27
#define pinB 25
int analogValue;
void setup(){
  Serial.begin(115200);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT); 
  pinMode(PIR, INPUT); 
  pinMode(LDR_PIN, INPUT);
  pinMode(pinR, OUTPUT);
  pinMode(pinG, OUTPUT);
  pinMode(pinB, OUTPUT);
   pinMode(SPEAKER_PIN, OUTPUT);
}

int readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void loop(){
  analogValue = analogRead(LDR_PIN);
  if (analogValue >=2500){
    digitalWrite(pinB, HIGH);
    digitalWrite(pinG, HIGH);
    digitalWrite(pinR, HIGH);
  } else{
    digitalWrite(pinB, LOW);
    digitalWrite(pinG, LOW);
    digitalWrite(pinR, LOW);
  }


  val = digitalRead(PIR);
  if(val == 1 && flagPIR == false){
    Serial.println("Кто-то рядом");
    flagPIR = true;
  }
  if(val == 0 && flagPIR == true){
    flagPIR = false;
  }
  

  char key = keypad.getKey();
  distance = readDistanceCM();
  if(distance <= 50 && passwordflagfalse == false && passwordflagtrue == false){
    if(!Serialpasswordflag){
      Serial.println();
      Serial.print("Введите пароль: ");
      Serialpasswordflag = true;
      passwordTimerStart = millis();
      timerActive = true;
      password = "";
    }

    if(timerActive && (millis() - passwordTimerStart > 10000)) {
      Serial.println();
      Serial.println("Время вышло! Тревога!");
      timerActive = false;
      passwordflagfalse = true;
      password = "";
      tone(8, 262, 10000);
    }
    
    if (key != NO_KEY && String(key) != "*" && String(key) != "=") {
      Serial.print(String(key));
      password += String(key);
    }
    if(String(key) == "*"){
      password = "";
      Serial.println();
      Serial.print("Введите пароль заново: ");
    }

    if(String(key) == "=") {
      if(password == passwordlog) {
        Serial.println();
        Serial.println("Пароль верный! Сигнализация снята.");
        password = "";
        timerActive = false;
        passwordflagtrue = true;
        key = NO_KEY;
      } else {
        Serial.println();
        Serial.println("Неверный пароль! Тревога!");
        timerActive = false;
        passwordflagfalse = true;
        password = "";
        tone(23, 262, 10000);
      }
       
    }
  } else{
    Serialpasswordflag = false;
  }
  if(String(key) == "=" && passwordflagtrue == true){
    key = NO_KEY;
    bool passwordesc = false;
    Serial.println("Хотите включить систему сигнализации? Введите пароль для её отключения в будущеем: ");
    passwordlog = "";
    bool enteringNewPassword = true;
    while(enteringNewPassword) {
      char newKey = keypad.getKey();
      
      if (newKey != NO_KEY && String(newKey) != "*" && String(newKey) != "=") {
        Serial.print(String(newKey));
        passwordlog += String(newKey);
      }
      if(String(newKey) == "*"){
        passwordlog = "";
        Serial.println();
        Serial.print("Введите пароль заново: "); 
      }
      if(String(newKey) == "=") {
        enteringNewPassword = false;
        passwordesc = true;
      }
    }
    if(passwordesc) {
      Serial.println();
      Serial.println("Система будет запущена через 10 секунд: ");
      passwordTimerStart = millis();
      timerActive = true;
  

      while(millis() - passwordTimerStart < 10000) {
        delay(100);
      }
  
      Serial.println("Система сигнализации включена");
      password = "";
      passwordflagtrue = false;
      passwordflagfalse = false;
      timerActive = false;
    }
     

  }
}