#include <Keypad.h>
#include <LiquidCrystal_I2C.h>
#define LED_gb A0
#define LED_r A1
#define BEEPER 13
#define DEFUSE_NUZKY 11
#define DEFUSE 10

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows

const uint8_t ROWS = 4;
const uint8_t COLS = 3;
char keys[ROWS][COLS] = {
  { '1', '2', '3'},
  { '4', '5', '6'},
  { '7', '8', '9'},
  { '*', '0', '#'}
};

uint8_t colPins[COLS] = { 5, 4, 3}; // Pins connected to C1, C2, C3, C4
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 }; // Pins connected to R1, R2, R3, R4

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

String lock="7355608";
String kod="";
bool plant=false, explosion=false;
float start, blik;
int reset = 0;
int tisk = 0;
int sekundy=0, power, beep, n=1;
float defuse=0;
int hvezdicky = 6;

void defuseloop() {
  
        
          switch (tisk) {
            case 0:
              lcd.clear();
              lcd.setCursor(0,0);
              lcd.print("DEFUSING");
              tisk = 1;
              break;
            case 1:
              lcd.print(".");
          }
          
          if(digitalRead(DEFUSE_NUZKY)==LOW)
            defuse+=1.7;
          else
            defuse++;
          if(defuse>9)
          {
            plant=0;
            lcd.clear();
            lcd.setCursor(0,0);
            lcd.print("THE BOMB HAS");
            lcd.setCursor(0,1);
            lcd.print("BEEN DEFUSED");
            defuse=1;
            sekundy=0;
            kod="";
            reset = 1;
            tisk = 0;
          }
          
        
}


void setup() {
  lcd.init(); //initialize the lcd
  lcd.backlight(); //open the backlight 

  pinMode(A5, OUTPUT);
  digitalWrite(A5, LOW);
  digitalWrite(DEFUSE_NUZKY, HIGH);
  digitalWrite(DEFUSE, HIGH);
  Serial.begin(9600);
  lcd.setCursor(9,0);
  lcd.print("*******");
  

}

void loop() {
  char key = keypad.getKey();
  if(plant==0)
  {
    
    if (key != NO_KEY) 
    {
      if (reset == 1) {
        lcd.clear();
        reset = 0;
      }
      lcd.clear();
      lcd.setCursor(9,0);
      kod+=key;

        for (int i = 0; i<hvezdicky; i++) {
          
          lcd.print("*");
        }
        lcd.print(kod);
        hvezdicky--;
        lcd.setCursor(9,0);
      
      
      if(kod.length()>6)
      {
        hvezdicky = 6;
        if(kod!=lock)
        {
          lcd.clear();
          lcd.setCursor(3,1);
          lcd.print("WRONG CODE");
          lcd.setCursor(9,0);
          kod="";
        }
        else
        {
          plant=1;
          start=millis();
          blik=millis();
          lcd.clear();
          lcd.setCursor(4,1);
          lcd.print("PLANTED!");
        }
      }
    }
  }
  else
  {
    if(explosion==0)
    {
      if((millis()-blik)>beep)
      {
        blik=millis();

        digitalWrite(LED_r, HIGH);
        if(sekundy>28)
          digitalWrite(LED_gb, HIGH);
        tone(BEEPER, 2093);
        delay(10);
        noTone(BEEPER);
        for(float i=255; i>=power;i--)
        {
          analogWrite(LED_r, i);
          if(sekundy>28)
            analogWrite(LED_gb, i);
          delay(3);
        }
        digitalWrite(LED_r, LOW);
        digitalWrite(LED_gb, LOW);
      }
      if((millis()-start)>999)
      {
        sekundy++;
        if(digitalRead(DEFUSE)==LOW || digitalRead(DEFUSE_NUZKY)==LOW) {
          defuseloop();
        }
        start=millis();
      }
      beep=map(sekundy, 0, 34, 1000, 100);
      power=map(beep, 1000, 100, 0, 250);
      if(sekundy==34)
      {
        
        explosion=1;
        lcd.clear();
        lcd.setCursor(5,0);
        lcd.print("BUUUUM");
        tone(BEEPER, 10);
        delay(5000);
        noTone(BEEPER);
      }
      
    }
  }
}