/*
  FAN
  HUMIDIFIER
  Egg Turner - Automatic
  Days
*/
#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include "DHT.h"


Adafruit_SSD1306 lcd(128, 64, &Wire, 4);
#define DHTPIN 7
#define DHTTYPE DHT22

#define btnUp   4
#define btnOk   8
#define btnDown 12
#define btnBack 13
#define eggTurner 2
#define lamp 3
#define fan 5
#define humidifier 6

boolean statusBtnUp   = false;
boolean statusBtnOk   = false;
boolean statusBtnDown = false;
boolean statusBtnBack = false;

boolean statusEggBtnUp   = false;
boolean statusEggBtnOk   = false;
boolean statusEggBtnDown = false;
boolean statusEggBtnBack = false;

boolean UP   = false;
boolean OK   = false;
boolean DOWN = false;
boolean BACK = false;

DHT dht(DHTPIN, DHTTYPE);

unsigned long timeNow = 0;
unsigned long timeLast = 0;


float tempset = 35;
float humset = 50;
float daysset = 0;


int page  = 1;
int menuItem = 1;
int eggTItem = 1;
int eggAuto = 1;


void setup() {
  

  dht.begin();

  lcd.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  lcd.clearDisplay();

  pinMode(btnUp,   INPUT_PULLUP);
  pinMode(btnOk,   INPUT_PULLUP);
  pinMode(btnDown, INPUT_PULLUP);
  pinMode(btnBack, INPUT_PULLUP);

  pinMode(DHTPIN, INPUT);
  
  //Output for Relays
  pinMode(eggTurner, OUTPUT);
  pinMode(lamp, OUTPUT);
  pinMode(fan, OUTPUT);
  pinMode(humidifier, OUTPUT);

Serial.begin(9600);
}

void loop() {

  appear();

  statusBtnUp   = digitalRead(btnUp);
  statusBtnOk   = digitalRead(btnOk);
  statusBtnDown = digitalRead(btnDown);
  statusBtnBack = digitalRead(btnBack);

  pressed_Up();
  pressed_Ok();
  pressed_Down();
  pressed_Back();

  // button up 
  // page 1 (Main Menu)
  if (UP && page == 1) {
    UP = false;
    menuItem --;
    if (menuItem < 1)menuItem = 3;
  }
  // page 4(Egg Turner)
  if (UP && page == 4) {
    UP = false;
    eggTItem --;
    if (eggTItem < 1)eggTItem = 2;
  }
  
  //button down
  // page 1 (Main Menu)
  if (DOWN && page == 1) {
    DOWN = false;
    menuItem ++;
    if (menuItem > 3)menuItem = 1;
  }
  // page 4 (EggTurner)
  if (DOWN && page == 4) {
    DOWN = false;
    eggTItem ++;
    if (eggTItem > 2)eggTItem = 1;
  }
  
  //button ok
  if (OK) {
    OK = false;
    if (page == 1 && menuItem == 1) {
      page = 2;
    } else if (page == 1 && menuItem == 2) {
      page = 3;
    } else if (page == 1 && menuItem == 3) {
      page = 4;
    }
    
  }
  
  //button back
  if (BACK) {
    BACK = false;
    if (page == 2 || page == 3 || page == 4) {
      page = 1;
    }
    eggAuto = 0;
  }


  //delay(1000);

}

//--------------------------------------------------------------------------------
void pressed_Up() {
  if (statusBtnUp != statusEggBtnUp) {
    if (statusBtnUp == 0) {
      UP = true;
    }
    delay(50);
  }
  statusEggBtnUp = statusBtnUp;
}

void pressed_Ok() {
  if (statusBtnOk != statusEggBtnOk) {
    if (statusBtnOk == 0) {
      OK = true;
    }
    delay(50);
  }
  statusEggBtnOk = statusBtnOk;
}

void pressed_Down() {
  if (statusBtnDown != statusEggBtnDown) {
    if (statusBtnDown == 0) {
      DOWN = true;
    }
    delay(50);
  }
  statusEggBtnDown = statusBtnDown;
}

void pressed_Back() {
  if (statusBtnBack != statusEggBtnBack) {
    if (statusBtnBack == 0) {
      BACK = true;
    }
    delay(50);
  }
  statusEggBtnBack = statusBtnBack;
}
//----------------------------------------------------------------------------



//everything that appears on the LCD is in this function
void appear() {

  float hum = dht.readHumidity();
  float temp = dht.readTemperature();

  if (page == 1) {
    lcd.clearDisplay();
    lcd.setTextSize(1);
    lcd.setTextColor(WHITE);
    lcd.setCursor(26, 0);
    lcd.print("Egg Incubator");

    if (menuItem == 1) {
      lcd.setCursor(5, 17);
      lcd.setTextColor(WHITE);
      lcd.print("> Temperature");
    } else {
      lcd.setCursor(5, 17);
      lcd.setTextColor(WHITE);
      lcd.print("  Temperature");
    }

    if (menuItem == 2) {
      lcd.setCursor(5, 27);
      lcd.setTextColor(WHITE);
      lcd.print("> Humidity");
    } else {
      lcd.setCursor(5, 27);
      lcd.setTextColor(WHITE);
      lcd.print("  Humidity");
    }

    if (menuItem == 3) {
      lcd.setCursor(5, 37);
      lcd.setTextColor(WHITE);
      lcd.print("> Egg Turner");
    } else {
      lcd.setCursor(5, 37);
      lcd.setTextColor(WHITE);
      lcd.print("  Egg Turner");
    }


  } else if (page == 2) {
    lcd.clearDisplay();
    lcd.setTextSize(1);
    lcd.setTextColor(WHITE);
    lcd.setCursor(18, 0);
    lcd.print("Set Temperature");
    lcd.setTextSize(2);
    lcd.setCursor(27,15);
    lcd.print(tempset);
    lcd.print("C  ");
    lcd.setTextSize(1);
    lcd.setCursor(9, 35);
    lcd.print("Current Temperature");
    lcd.setCursor(30, 50);
    lcd.print(temp);
      if (digitalRead(btnUp) == LOW)
      {tempset = tempset + 0.1;
      }
      if (digitalRead(btnDown) == LOW && tempset > 30.1)
      {tempset = tempset - 0.1;
      }

      if (tempset >= temp){
        digitalWrite(lamp, HIGH);
      } else if(tempset < temp){
        digitalWrite(lamp, LOW);
      }

  } else if (page == 3) {
    lcd.clearDisplay();
    lcd.setTextSize(1);
    lcd.setTextColor(WHITE);
    lcd.setCursor(25, 0);
    lcd.print("Set Humidity");
    lcd.setTextSize(2);
    lcd.setCursor(27,15);
    lcd.print(humset);
    lcd.print("%  ");
    lcd.setTextSize(1);
    lcd.setCursor(14, 35);
    lcd.print("Current Humidity");
    lcd.setCursor(30, 50);
    lcd.print(hum);
      if (digitalRead(btnUp) == LOW)
      {humset = humset + 0.5;
      }
      if (digitalRead(btnDown) == LOW && humset > 45)
      {humset = humset - 0.5;
      }
      if (humset >= hum){
        digitalWrite(fan, HIGH);
        digitalWrite(humidifier, HIGH);
      }
      else if(humset < hum){
        digitalWrite(fan, LOW);
        digitalWrite(humidifier, LOW);
      }
  } else if (page == 4) {
    lcd.clearDisplay();
    lcd.setTextSize(1);
    lcd.setTextColor(WHITE);
    lcd.setCursor(15, 0);
    lcd.print("Egg Turner Status");
      
      if (eggTItem == 1) {
        lcd.setCursor(5, 17);
        lcd.setTextColor(WHITE);
        lcd.print("> On");
        delay(50);
        if (digitalRead(btnOk) == LOW)
        {digitalWrite(eggTurner, HIGH);
        delay(50);
        }
      } else {
        lcd.setCursor(5, 17);
        lcd.setTextColor(WHITE);
        lcd.print("  On");
      }
      
      if (eggTItem == 2) {
        lcd.setCursor(5, 27);
        lcd.setTextColor(WHITE);
        lcd.print("> Off");
        delay(50);
        if (digitalRead(btnOk) == LOW) {
          digitalWrite(eggTurner, LOW);
        delay(50);
        }
      } else {
        lcd.setCursor(5, 27);
        lcd.setTextColor(WHITE);
        lcd.print("  Off");
      }
  }

        

  lcd.display();
}