#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include "RTClib.h"

LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo myservo;
RTC_DS1307 rtc;

int rPin = 13;
int gPin = 12;
int bPin = 11;
int buttonPin = 7;
int buttonLedPin = 2;
int fadePin = 9;
int servoPin = 6;
int trig = 4;
int echo = 3;

unsigned long curTime = 0;

unsigned long rPre = 0;
unsigned long gPre = 0;
unsigned long bPre = 0;
unsigned long buttonPre = 0;
unsigned long fPre = 0;
unsigned long sPre = 0;
unsigned long lcdPre = 0;



int rTime = 200;
int gTime = 500;
int bTime = 400;
int buttonTime = 50;
int fTime = 10;
int sTime = 15;
int lcdTime = 1000;

int rState = LOW;
int gState = LOW;
int bState = LOW;
int buttonledState = LOW;
int buttonState;
int bright = 0;
int pos = 0;
int posIncre = 1 ;

int cen;

char daysOfTheWeek[7][12] = {"Sun", "Mon", "Tue",
                             "Wed", "Thu", "Fri", "Sat"
                            };

void setup() {

  Serial.begin(115200);
  rtc.begin();
  lcd.init();
  lcd.backlight();

  // Serial.begin(115200);

  pinMode(rPin, OUTPUT);
  pinMode(gPin, OUTPUT);
  pinMode(bPin, OUTPUT);

  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(buttonLedPin, OUTPUT);

  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);

  myservo.attach(servoPin);
  pinMode(bPin, OUTPUT);


}

void loop() {

  curTime = millis();



  button();
 
// servo();
 

}//  end loop

void blink() {
  /////////////////////////////////////  red
  if (curTime - rPre >= rTime) {
    rPre = curTime;
    if (rState == LOW) {
      rState = HIGH;
      rTime = 2000;
    } else {
      rState = LOW;
      rTime = 500;
    }
    digitalWrite(rPin, rState);

  }
  //////////////////////////////  end red

  /////////////////////////////////////  green
  if (curTime - gPre >= gTime) {
    gPre = curTime;
    if (gState == LOW) {
      gState = HIGH;
      gTime = 200;
    } else {
      gState = LOW;
      gTime = 1000;
    }
    digitalWrite(gPin, gState);

  }
  //////////////////////////////  end green
  /////////////////////////////////////  blue
  if (curTime - bPre >= bTime) {
    bPre = curTime;
    if (bState == LOW) {
      bState = HIGH;
    } else {
      bState = LOW;
    }
    digitalWrite(bPin, bState);

  }
  //////////////////////////////  end blue

}

void button() {
  if (curTime - buttonPre >= buttonTime) {
    buttonPre = curTime;
    buttonState = digitalRead(buttonPin);
    if (buttonState == LOW) {
      buttonledState = !buttonledState;
      // } else {
      //   buttonledState = LOW;
    }
    digitalWrite(buttonLedPin, buttonledState);
    if (buttonledState == HIGH) {
      time();
    } else {
      bin();
    }
  }


}

void fade() {
  if (curTime - fPre >= fTime) {
    fPre  = curTime;
    bright++;
    analogWrite(fadePin, bright);
    if (bright >= 255) {
      bright = 0;
    }
  }
}

void servo() {

  if (curTime - sPre >= sTime) {
    sPre = curTime;
    pos  +=  posIncre;
    myservo.write(pos);
    if (pos >= 180 || pos <= 0) {
      posIncre  = -posIncre;
    }
  }
}

void bin() {
  digitalWrite(trig, HIGH);
  delayMicroseconds(10);
  digitalWrite(trig, LOW);

  // Read the result:
  int duration = pulseIn(echo, HIGH);
  cen = duration / 58;
  lcd.setCursor(0, 0);
  lcd.print("Dist in CM: ");
  lcd.print(cen);
  lcd.print("  ");

  if (cen >= 100) {
      myservo.write(90);
  }
  if (cen <= 100) {
      myservo.write(0);
  }

  lcd.setCursor(0, 1);
  lcd.print("Dist inch: ");
  lcd.print(duration / 148);
  lcd.print("  ");
}

void time() {
  DateTime now = rtc.now();

  lcd.setCursor(0, 0);
  lcd.print("Date:");
  lcd.print(now.day());

  lcd.print('/');
  lcd.print(now.month());
  lcd.print('/');
  lcd.print(now.year());

  lcd.print(daysOfTheWeek[now.dayOfTheWeek()]);

  lcd.setCursor(0, 1);
  lcd.print("Time : ");
  lcd.print(now.hour(), DEC);
  lcd.print(':');
  lcd.print(now.minute());
  lcd.print(':');
  lcd.print(now.second(), DEC);
  lcd.println("");

}