#include "Clock.h"

#include <LiquidCrystal_I2C.h>

#define I2C_ADDR    0x27
#define LCD_COLUMNS 20
#define LCD_LINES   4

const int PIN_BTN_HOUR_DEC = 2;
const int PIN_BTN_HOUR_INC = 1;
const int PIN_BTN_MIN_DEC = 4;
const int PIN_BTN_MIN_INC = 3;
const int PIN_BTN_SEC_ZERO = 5;

LiquidCrystal_I2C lcd(I2C_ADDR, LCD_COLUMNS, LCD_LINES);

Clock clock;

void displayDateTime() {
  DateTime now = clock.now();
  lcd.setCursor(0, 0);
  lcd.print("Date: " + String(now.day()) + "." + String(now.month()) + "." + String(now.year()));
  lcd.setCursor(0, 1);
  String nowMin = (now.minute() / 10 == 0) ? "0" + String(now.minute()) : String(now.minute());
  String nowSec = (now.second() / 10 == 0) ? "0" + String(now.second()) : String(now.second());
  if (now.second() % 2 == 0) {
    lcd.print("Time: " + String(now.hour()) + ":" + nowMin + ":" + nowSec);
  } else {
    lcd.print("Time: " + String(now.hour()) + ":" + nowMin + " " + nowSec);
  }
}

void setup() {
  Serial.begin(9600);

  pinMode(PIN_BTN_HOUR_INC, INPUT_PULLUP);
  pinMode(PIN_BTN_HOUR_DEC, INPUT_PULLUP);
  pinMode(PIN_BTN_MIN_INC, INPUT_PULLUP);
  pinMode(PIN_BTN_MIN_DEC, INPUT_PULLUP);
  pinMode(PIN_BTN_SEC_ZERO, INPUT_PULLUP);
  
  lcd.init();
  lcd.backlight();

  clock.begin();
}

void loop() {
  displayDateTime();
  if (digitalRead(PIN_BTN_HOUR_INC) != 1) {
    clock.incrementHour();
    delay(200);
    lcd.clear();
  }
  if (digitalRead(PIN_BTN_HOUR_DEC) != 1) {
    clock.decrementHour();
    delay(200);
    lcd.clear();
  }
  if (digitalRead(PIN_BTN_MIN_INC) != 1) {
    clock.incrementMinute();
    Serial.println(clock.now().minute());
    delay(200);
    lcd.clear();
  }
  if (digitalRead(PIN_BTN_MIN_DEC) != 1) {
    clock.decrementMinute();
    Serial.println(clock.now().minute());
    delay(200);
    lcd.clear();
  }
  if (digitalRead(PIN_BTN_SEC_ZERO) != 1) {
    clock.zeroSecond();
    delay(200);
    lcd.clear();
  }
}