/* ezButton_Calss_and_Menu.ino
 * 
 * Simple hotplate controller using Arduino
 * by : Rilles Eko Prianto
 * January 18, 2023
*/ 

#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#include <ezButton.h>

enum mode{MODE_OFF, MODE_START, MODE_NORMAL, MODE_RAMP_UP, MODE_COOLING};
char * status[5] = {"OFF       ","STARTING  ","HEATING UP","RAMP UP   ","COOLING  "};

byte relay = 5;
byte ssr = 6;

byte state;
byte sensor = A0;
bool btnState = 0;
bool btnLastState;
byte menu = 0;
short temperature = 0;
unsigned long lastTime, currentTime = 0;

ezButton btn1(3), btn2(4);
mode md = 0;
LiquidCrystal_I2C lcd(0x3C,16, 2);  // set the LCD address to 0x27 for a 16 chars and 2 line display


void setup() {
  pinMode(relay, OUTPUT);
  pinMode(ssr, OUTPUT);
  // btnLastState = btn1.state();
  // Serial.begin(9600);
  btn1.setDebounceTime(30);
  lcd.init();                      // initialize the lcd 
  lcd.backlight();
//lcd.print("0123456789012345");
  disp(0,0, "  RILLES FOTO", false);
  disp(0,1, "DIGITAL PROJECTS", false);

  delay(500);
  lcd.clear();
  disp(0,0, "TEMP:", false);
  disp(9,0, "SET:", false);
  disp(0,1, status[state], false);
}

void disp(byte x, byte y, char* teks, bool clr){
  lcd.setCursor(x,y);
  if(clr) {
    lcd.clear();
  }
//  lcd.print("0123456789012345");
  lcd.print(teks);
}

void loop() {
 
  btn1.loop();
  if (btn1.isPressed()){
    lastTime = millis();
    // Serial.print("The button is pressed\t");
    // Serial.println(lastTime);

  }
  
  
  if (btn1.isReleased()){
    currentTime = millis();
    // Serial.print("The button is released\t");
    // Serial.println(currentTime);

    if (currentTime-lastTime <800){
      // Serial.print("\t");
      // Serial.println(currentTime-lastTime);
      if (menu>0){
        menu++;
      }
    
    } else {
      if (menu>0){
        menu=0;
      } else {
        menu = 1;
        
      }
    }
  }
  updateMenu();

}

void updateMenu(){
  if (menu==5) menu = 1;
  md = menu;
  
  disp(0,1, status[menu], false);
  switch (md){
    
    case MODE_OFF:         // OFF
      break;
    case MODE_START:         // STARTING

      break;
    case MODE_NORMAL:         // HEATING UP
      break;
    case MODE_RAMP_UP:         // RAMP UP
      break;
    case MODE_COOLING:         // COOLING
      break;
  }

}