#include <LiquidCrystal_I2C.h> 

//INDOOR SENSOR
#define WINDOW 0
#define WATER  1
#define TEMPERATURE 2
#define FIRE 3


//OUTDOOR SENSOR CONNECTIONS
#define FRONTDOOR 4
#define PRESENCE 5
#define GARAGE 6
#define BACKDOOR 7

#define KEY 10
#define RFID 9

#define DELAY 5000


bool isIndoorSensor();
bool isOutdoorSensor();
void show(char *);
LiquidCrystal_I2C lcd(0x27, 16, 2);

// variable state contains the current state
enum {STANDBY,INDOORS,OUTDOORS,ALARM, WAIT_IN, WAIT_OUT} state = STANDBY;
unsigned long start_time = 0; //tähän laitetaan aika muistiin


void setup()
{
  
  pinMode(FIRE,INPUT_PULLUP);
  pinMode(BACKDOOR,INPUT_PULLUP);
  pinMode(WATER,INPUT_PULLUP);
  pinMode(WINDOW,INPUT_PULLUP);
  pinMode(TEMPERATURE,INPUT_PULLUP);    
  pinMode(GARAGE,INPUT_PULLUP);
  pinMode(PRESENCE,INPUT_PULLUP);
  pinMode(FRONTDOOR,INPUT_PULLUP);
  pinMode(KEY,INPUT);
  pinMode(RFID,INPUT);
  lcd.backlight();
  lcd.begin(16, 2);    
  show("STANDBY");
    
}

void loop()
{
  // turn the LED on (HIGH is the voltage level)
  switch (state) {
    case STANDBY:
    if (isActivated()){
      state = INDOORS;
      show("INDOORS");
    }

		break;

    case INDOORS:

    if(isRFID()){
      state = WAIT_OUT;
      show("Wait out");
      start_time = millis();
    }

    else if(isIndoorSensor())
    {
      state = ALARM;
      show("ALARM !!!"); 
      
    }

    else if(!isActivated()){
    state = STANDBY;
    show ("STANDBY");
    }

   	break;
    
    case OUTDOORS:

     if (isOutdoorSensor())
    {
      state = WAIT_IN; 
      show("Wait in");
      start_time = millis();

    }

    else if(isIndoorSensor())
    {
      state = ALARM;
      show("ALARM!!!");
    }

    case ALARM:
    if(!isActivated())
    {
      state = STANDBY;
      show("STANDBY");
    }
   	break;
    
    case WAIT_OUT:

    if ((millis() - start_time) >= DELAY)
    {state = OUTDOORS; 
     show("OUTDOORS");
     }

    break;

    case WAIT_IN:

    if ((millis()- start_time) >= DELAY)
    {
      state = ALARM;
      show ("ALARM !!!");
    }

    else if (!isRFID())
    {
      state = INDOORS;
      show ("INDOORS");
    }

    break;
  }
  
   
}

bool isIndoorSensor() {
  return !(digitalRead(WINDOW) && digitalRead(WATER) && digitalRead(TEMPERATURE) && digitalRead(FIRE));
  // kaikki lukijat on 1 jos ne ei ole päällä
  //palauttaa 1 jos yksikin lukijoista on 0
}
            
bool isOutdoorSensor() {
 return !(digitalRead(FRONTDOOR) && digitalRead(BACKDOOR) && digitalRead(PRESENCE) && digitalRead(GARAGE));
 // kaikki lukijat on 1 jos ne ei ole päällä
  //palauttaa 1 jos yksikin lukijoista on 0

}            

void show(char* msg) {
	lcd.setCursor(0,0); //lcd näytön asetukset
	lcd.print(msg);
    lcd.print("  ");
     
}
bool isActivated() {return digitalRead(KEY);}
bool isRFID() {return digitalRead(RFID);}