#include <Wire.h>
#include <Keypad.h>
#include <RTClib.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
char key = "";
char key2 = "";
Servo myservo;
RTC_DS1307 rtc;
bool feed = false;


String feedTime = "14:36:00";
int screen_page = 1;
int feed_duration = 2000;
int pos = 0;
#define I2C_ADDR    0x27
#define LCD_COLUMNS 16
#define LCD_LINES   2

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);


unsigned long previousTime1 = 0;
unsigned long previousTime2 = 0;
unsigned long previousTime3 = 0;

const unsigned long time1 = 1000;
const unsigned long time2 = 1000;
const unsigned long time3 = 500;

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

uint8_t colPins[COLS] = { 5, 4, 3, 2 }; // 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);
Keypad customKeypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  lcd.setCursor(3, 0);
  lcd.print("AUTOMATIC");
  lcd.setCursor(5, 1);
  lcd.print("FEEDER");
  myservo.attach(10);
  
  if (! rtc.begin()) {
    Serial.println("Couldn't find RTC");
    Serial.flush();
    abort();
  }

  delay(1000);
  lcd.clear();
}

void loop() {
   if(key != NO_KEY){
    lcd.clear();
  }
  
  DateTime time = rtc.now();
  feeder();
  lcd_display(time);
  time_check(time);
  key = keypad.getKey();
 
  if (key == '#') {
    feed = true;
    screen_page = 1;
  }

   if (key == '*') {
    if((screen_page >= 1) && (screen_page <= 2)){
      screen_page++;
    }else if(screen_page == 3){
      screen_page = 1;
    }
   }
}

void feeder(){
  unsigned long currentTime = millis();
  if(currentTime - previousTime1 >= time1){
    if(feed){
      myservo.write(180);
      Serial.println("Feeder is On");
      delay(feed_duration);
      feed = false;
      myservo.write(90);
    }
    else{
      Serial.println("Feeder is off");
      feed = false;
    }
    previousTime1 = currentTime;
  }
}


void lcd_display(DateTime time){
  if(screen_page == 1){
    lcd.setCursor(0, 0);
    lcd.print(String("Time: "+time.timestamp(DateTime::TIMESTAMP_TIME)));
    lcd.setCursor(0, 1);
    lcd.print(String("Date: "+time.timestamp(DateTime::TIMESTAMP_DATE)));
  }else if(screen_page == 2){
    lcd.setCursor(0, 0);
    lcd.print("A: Set Time");
    lcd.setCursor(0, 1);
    lcd.print("B: Set Feed Time");
    if(key == 'A'){
      screen_page = 4;
     
    }else if(key == 'B'){
      screen_page = 5;
    }
  }else if(screen_page == 3){
    lcd.setCursor(0, 0);
    lcd.print("C: Feed Duration");
    // lcd.setCursor(0, 1);
    // lcd.print("D: ");
  }else if(screen_page == 4){
    lcd.setCursor(0, 0);
    lcd.print("Enter Hour: ");
  }else if(screen_page == 5){
    lcd.setCursor(0, 0);
    lcd.print("B: Set Feed Time");
  }
}

void time_check(DateTime time){
  unsigned long currentTime = millis();
  if(currentTime - previousTime3 >= time2){
    if(feedTime == time.timestamp(DateTime::TIMESTAMP_TIME)){
        feed = true;
        delay(1000);
    }
    previousTime3 = currentTime;
  }
}