#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <HCSR04.h>
#include "SPI.h"
#include "NRFLite.h"

const static uint8_t RADIO_ID = 0;       // Our radio's id.  The transmitter will send to this id.
const static uint8_t PIN_RADIO_CE = 9;
const static uint8_t PIN_RADIO_CSN = 10;

struct RadioPacket // Any packet up to 32 bytes can be sent.
{
    uint8_t FromRadioId;
    uint32_t OnTimeMillis;
    uint32_t FailedTxCount;
};

NRFLite _radio;
RadioPacket _radioData;

LiquidCrystal_I2C lcd(0x27, 16, 2);  
HCSR04 hc(5, 6);

#define buzzer  3
#define WSENSOR 0
#define FSENSOR 1

float distance,water,flame;
String message;

void setup() 
{ 
  Serial.begin(9600);
  Serial.println("system initialize");
  pinMode(buzzer,OUTPUT);
  digitalWrite(buzzer,LOW);
  lcd.init();
  lcd.backlight();
  welcomeDisplay();
  delay(1000);
  if (!_radio.init(RADIO_ID, PIN_RADIO_CE, PIN_RADIO_CSN))
    {
        Serial.println("Cannot communicate with radio");
        //while (1); // Wait here forever.
    }
}

void loop() 
{
  home_display();
  getdata();
  while(flame>=50)
  {
    message="FLAME AHEAD";
    digitalWrite(buzzer,HIGH);
    alert_Display(message);
    getdata();
  }
  while(distance<120 && distance>0)
  {
    message="OBSTRACLE AHEAD";
    Alert(1);
    alert_Display(message);
    getdata();
  }
  while(water>=50)
  {
    message="WATER AHEAD";
    digitalWrite(buzzer,HIGH);
    alert_Display(message);
    getdata();
  }
  //checkNrf();
}

void Buzzer(uint8_t num)
{
  for(uint8_t j=0;j<num;j++)
  {
    digitalWrite(buzzer,HIGH);
    delay(500);
    digitalWrite(buzzer,LOW);
    delay(250);
  }
}


void getdata() 
{
  water = map(analogRead(WSENSOR),0,1023,0,100);
  flame = map(analogRead(FSENSOR),0,1023,0,100);
  distance = hc.dist();
  Serial.print("water:");
  Serial.print(water);
  Serial.print("flame:");
  Serial.println(flame);
  Serial.print("distance:");
  Serial.println(distance);
} 

bool checkNrf()
{
  while (_radio.hasData())
    {
        _radio.readData(&_radioData); // Note how '&' must be placed in front of the variable name.

        String msg = "Radio ";
        msg += _radioData.FromRadioId;
        msg += ", ";
        msg += _radioData.OnTimeMillis;
        msg += " ms, ";
        msg += _radioData.FailedTxCount;
        msg += " Failed TX";
        Serial.println(msg);
    }
}

void welcomeDisplay()
{
     lcd.clear();
     lcd.setCursor(0,0);
     lcd.print("PARTIENT DEMAND"); 
     lcd.setCursor(0,1);
     lcd.print("   MONITORING   "); 
     delay(3000);
     lcd.clear();
     lcd.setCursor(0,0);
     lcd.print("INITIALIZING SYS");
     lcd.setCursor(0,1);
     lcd.print("PLEASE WAIT ....");
}

void home_display()
{
     lcd.clear();
     lcd.setCursor(0,0);
     lcd.print("   SMART BLIND  "); 
     lcd.setCursor(0,1);
     lcd.print("      SHOES     "); 
}

void alert_Display(String text)
 {
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print(">>> !ALERT! <<<<");
    if(text.length()<=16)
    {
      lcd.setCursor(0,1);
      lcd.print(text);
    }
 }

void Alert(uint8_t num)
{
  for(uint8_t i=0;i<num;i++)
  {
    digitalWrite(buzzer,HIGH);
    delay(500);
    digitalWrite(buzzer,LOW);
    delay(250);
  }
}