#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C LCD(0x27, 16, 2);

//Push Button Pins
const int button1 = 2;
const int button2 = 3;
const int button3 = 4;
const int button4 = 5;
//Push Button Millis
unsigned long millisButton1 = 0;
unsigned long millisButton2 = 0;
unsigned long millisButton3 = 0;
unsigned long millisButton4 = 0;

//Shift Register Pins
const int data = 8;
const int latch = 9;
const int clock = 10;
int blokData[8] = {false, false, false, false, false, false, false, false};

//Mux Pins
const int selector1 = 7;  //LSB
const int selector2 = 6;
const int muxSignal = A3;

//Sensor Value
float sensor_ph = 7.6;
float sensor_nutrisi = 350.0;
float sensor_suhu = 24.5;
float sensor_cahaya = 20;

float target_ph = 7;
float target_nutrisi = 850;

//LCD
int halaman = 1;
bool edit = false;

void setup() {
  LCD.init();
  LCD.backlight();
  LCD.home();

  pinMode(button1, INPUT);
  pinMode(button2, INPUT);
  pinMode(button3, INPUT);
  pinMode(button4, INPUT);

  pinMode(data, OUTPUT);
  pinMode(latch, OUTPUT);
  pinMode(clock, OUTPUT);

  pinMode(selector1, OUTPUT);
  pinMode(selector2, OUTPUT);
  pinMode(muxSignal, INPUT);
}

void loop() {
  periksaPushButton();

  bacaSeluruhSensor();

  perbaruiLogikaRelay();

  nyalakanRelay();

  resetRelay();

  if(halaman == 1){
    LCD.setCursor(0,0);
    LCD.print("Temperature     ");
    LCD.setCursor(10,1);
    LCD.print(sensor_suhu, 1);
    LCD.setCursor(15,1);
    LCD.print("C");
  }else if(halaman == 2){
    LCD.setCursor(0,0);
    LCD.print("Soil Nutrition ");
    if(edit == true){
      LCD.setCursor(0,1);
      LCD.print("Target-");
      LCD.print(target_nutrisi, 1);
    }else{
      LCD.setCursor(7,1);
      LCD.print(sensor_nutrisi, 1);
    }
    LCD.setCursor(13,1);
    LCD.print("PPM");
  }else if(halaman == 3){
    LCD.setCursor(0,0);
    LCD.print("Acid-Base Level ");
    if(edit == true){
      LCD.setCursor(0,1);
      LCD.print("Target-");
      LCD.print(target_ph, 1);
    }else{
      LCD.setCursor(10,1);
      LCD.print(sensor_ph, 1);
    }
    LCD.setCursor(14,1);
    LCD.print("pH");
  }else if(halaman == 4){
    LCD.setCursor(0,0);
    LCD.print("Light Intensity ");
    LCD.setCursor(9,1);
    LCD.print(sensor_cahaya, 1);
    LCD.setCursor(14,1);
    LCD.print("cd");
  }
}

void gantiSaluranMUX(int saluran){
  if(saluran == 0){
    digitalWrite(selector1,0);
    digitalWrite(selector2,0);
  }else if(saluran == 1){
    digitalWrite(selector1,1);
    digitalWrite(selector2,0);
  }else if(saluran == 2){
    digitalWrite(selector1,0);
    digitalWrite(selector2,1);
  }else if(saluran == 3){
    digitalWrite(selector1,1);
    digitalWrite(selector2,1);
  } 
}

void nyalakanRelay(){
  digitalWrite(latch,LOW);
  for(int i = 0; i < 8; i++){
    digitalWrite(clock, LOW);
    digitalWrite(data, !blokData[i]);
    digitalWrite(clock, HIGH);
  }
  digitalWrite(latch,HIGH);
}

void perbaruiLogikaRelay(){
  if(sensor_ph > target_ph){
    // 8 9 10 11 12
    blokData[0] = true;
  }else if(sensor_ph < target_ph){
    // 1 2 3 4 5 
    blokData[1] = true;
  }

  if(sensor_nutrisi < target_nutrisi){
    blokData[2] = true;
    blokData[3] = true;
  }
}

void resetRelay(){
  for(int i = 0; i < 8; i++){
    blokData[i] = false;
  }
}

void periksaPushButton(){
  if(digitalRead(button1) == HIGH){
    if(millis() - millisButton1 > 150){
      LCD.clear();
      edit = false;
      millisButton1 = millis();
    }
  }

  if(digitalRead(button2) == HIGH){
    if(millis() - millisButton2 > 150){
      LCD.clear();
      if(edit == true){
        if(halaman == 2){
          target_nutrisi += 10;
          if(target_nutrisi > 900){
            target_nutrisi = 900;
          }
        }else if(halaman == 3){
          target_ph += 1;
          if(target_ph > 14){
            target_ph = 14;
          }
        }
      }else{
        halaman -= 1;
        if(halaman < 1){
          halaman = 4;
        }
      }
      millisButton2 = millis();
    }
  }

  if(digitalRead(button3) == HIGH){
    if(millis() - millisButton3 > 150){
      LCD.clear();
      if(edit == true){
        if(halaman == 2){
          target_nutrisi -= 10;
          if(target_nutrisi < 100){
            target_nutrisi = 100;
          }
        }else if(halaman == 3){
          target_ph -= 1;
          if(target_ph < 1){
            target_ph = 1;
          }
        }
      }else{
        halaman += 1;
        if(halaman > 4){
          halaman = 1;
        }
      }
      millisButton3 = millis();
    }
  }

  if(digitalRead(button4) == HIGH){
    if(millis() - millisButton4 > 150){
      LCD.clear();
      edit = true;
      millisButton4 = millis();
    }
  }
}

void bacaSeluruhSensor(){
  // sensor suhu
  gantiSaluranMUX(0);
  delay(10);
  sensor_suhu = map(analogRead(muxSignal), 0, 1023, 22.5, 30.5);
  
  // sensor nutrisi
  gantiSaluranMUX(1);
  delay(10);
  sensor_nutrisi = map(analogRead(muxSignal), 0, 1023, 100, 900);
  
  //sensor ph
  gantiSaluranMUX(2);
  delay(10);
  sensor_ph = map(analogRead(muxSignal), 0, 1023, 1, 14);
  
  //sensor cahaya
  gantiSaluranMUX(3);
  delay(10);
  sensor_cahaya = map(analogRead(muxSignal), 0, 1023, 10, 90);
  
}


// Yang belum di kerjakan:
// Firebase
// Relay mati habis 2 detik lewat
// buzzer habis 1 minggu ?