/* *********************************************************
 *  TeaBot V1.0 by SnakeP
 *  ********************************************************
 *  Code based on: https://www.youtube.com/c/CarloStramaglia
 *                      Thanks ;)
 *  ********************************************************
 *  Single click - set time in minutes
 *  Double click - start timer
 *  Long click - reset
 */
#include <Wire.h>
#include <LiquidCrystal.h>
 
#include <Servo.h>
#include "OneButton.h"
#include <EEPROM.h>
#include <LibPrintf.h>

#define EESIZE 256
#define EEPROM_MIN 10  //adresse minutes in EEProm
#define EEPROM_SEC 11  //adresse seconds in EEProm

#define DS1307_ADDRESS 0x68

LiquidCrystal lcd(12, 11, 10, 9, 8, 7);

byte zero = 0x00;

int col = 0;

//int number, lastMin1, lastMin2, lastHour1, lastHour2;
int iStoredMin, iStoredSec, iTeaTimeSec, iTimeRemain;
bool bRunning = false;

Servo myservo;

//Servo position value definition
int POS_UP = 120;       //Up-position
int POS_MIDDLE = 85;    //Middle-position
int POS_DOWN = 35;      //Down-position

char strLine[4][20];
char emptyLine[20] = "                    "; // 20 Blanks

int i_seconds ;
int i_minutes;
int i_hours;
int i_dayWeek;
int i_dayMonth;
int i_month;
int i_year;


// Push Button PIN definition
#define PIN_INPUT A2

OneButton button1(PIN_INPUT, true);

void setup() {
  Serial.begin(115200);
  Wire.begin();
  // Initializes the LCD
  lcd.begin(20, 4);
  sprintf(strLine[0], "%20s", "Tea Maker V1.0   ");
  sprintf(strLine[1], "%20s", "Starting....   ");
  updateDisplay(true, 0);

  //setDateTime();
  setEEPromDefault();
  myservo.attach(2);
  myservo.write(POS_UP);

  button1.attachClick(singleClick_1);
  button1.attachDoubleClick(doubleClick_1);
  button1.attachLongPressStart(longPressStart_1);

  iStoredMin = EEPROM.read(EEPROM_MIN);
  iStoredSec = EEPROM.read(EEPROM_SEC);
  sprintf(strLine[2], "TeaTime: %imin %isec", iStoredMin, iStoredSec);
  updateDisplay(false, 2);
  
  Serial.println(iStoredMin);
  Serial.println(iStoredSec);

  delay(100);  
}

int iLoopCnt = 0;

void loop() {
  button1.tick();
  delay (10);
  iLoopCnt++;
  if (iLoopCnt >= 100)
  {
     showClock();
     updateProgress();
     iLoopCnt = 0;
  }
}

void updateDisplay(bool bAllLines, int iLine)
{
  if (bAllLines)
  {
    for (int iLine = 0; iLine < 4; iLine++)
    {
      lcd.setCursor(0,iLine);
      lcd.print(strLine[iLine]); 
    }
  }
  else
  {
    lcd.setCursor(0,iLine);
    lcd.print(emptyLine);
    lcd.setCursor(0,iLine);
     lcd.print(strLine[iLine]); 
  }
}
byte convertToBCD(byte val) { // Converts the decimal number to BCD
  return ( (val / 10 * 16) + (val % 10) );
}

byte convertToDecimal(byte val) { // Converts from BCD to decimal
  return ( (val / 16 * 10) + (val % 16) );
}

void getDateTime()
{
  Wire.beginTransmission(DS1307_ADDRESS);
  Wire.write(zero);  // Stop at CI so that it can receive data
  Wire.endTransmission();
  Wire.requestFrom(DS1307_ADDRESS, 7);

  i_seconds = convertToDecimal(Wire.read());
  i_minutes = convertToDecimal(Wire.read());
  i_hours = convertToDecimal(Wire.read() & 0b111111);
  i_dayWeek = convertToDecimal(Wire.read());
  i_dayMonth = convertToDecimal(Wire.read());
  i_month = convertToDecimal(Wire.read());
  i_year = convertToDecimal(Wire.read());

}

void setDateTime()   // Set the date and time of the DS1307
{
  byte seconds = 03; // Values ​​from 0 to 59
  byte minutes = 02; // Values ​​from 0 to 59
  byte hours = 01; // Values ​​from 0 to 23
  byte dayWeek = 1; // Values ​​from 0 to 6, where 0 = Domgino, 1 = Monday
  byte dayMonth = 17; // Values ​​from 1 to 31
  byte month = 5; // Values ​​from 1 to 12
  byte year = 21; // Values ​​from 0 to 99

  Wire.beginTransmission(DS1307_ADDRESS);
  Wire.write(zero); // Stop at CI so that it can receive data

  // The lines below write the values ​​of date and
  // time they were placed in the variables above
  Wire.write(convertToBCD(seconds));
  Wire.write(convertToBCD(minutes));
  Wire.write(convertToBCD(hours));
  Wire.write(convertToBCD(dayWeek));
  Wire.write(convertToBCD(dayMonth));
  Wire.write(convertToBCD(month));
  Wire.write(convertToBCD(year));
  Wire.write(zero); // Start at CI
  Wire.endTransmission();
}

void setEEPromDefault()
{
  Serial.print("EEPROM length: ");

  Serial.println(EEPROM.length());

  //Print the result of calling eeprom_crc()

  Serial.print("CRC32 of EEPROM data: 0x");

  Serial.println(eeprom_crc(), HEX);

  EEPROM.update(EEPROM_MIN, 2);
  EEPROM.update(EEPROM_SEC, 25);
     
}

unsigned long eeprom_crc(void) {

  const unsigned long crc_table[16] = {
    0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
    0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
    0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
    0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
  };

  unsigned long crc = ~0L;

  for (int index = 0 ; index < EEPROM.length()  ; ++index) 
  {
    crc = crc_table[(crc ^ EEPROM[index]) & 0x0f] ^ (crc >> 4);
    crc = crc_table[(crc ^ (EEPROM[index] >> 4)) & 0x0f] ^ (crc >> 4);
    crc = ~crc;
  }

  return crc;
}

void showClock()
{
  getDateTime();

  if (i_seconds%2)
  {
    sprintf(strLine[1], "%02i.%02i.  %02i:%02i      ", i_dayMonth, i_month, i_hours, i_minutes, i_seconds);
  }
  else
    sprintf(strLine[1], "%02i.%02i.  %02i:%02i *    ", i_dayMonth, i_month, i_hours, i_minutes, i_seconds);
   
  updateDisplay(false, 1);

}
void updateProgress()
{
  static int iDots = 20;
  static int iLastDots = 0;
  if (bRunning)
  {
    int i = iTeaTimeSec/20;
    iTimeRemain--;
    iDots = iTimeRemain/i;
    if (iDots != iLastDots)
    {
      iLastDots = iDots;
      sprintf(strLine[3], "%20.*s",iDots, "*>>>>>>>>>>>>>>>>>>>");
      updateDisplay(false, 3);
    }
    //Serial.print("Dots: ");
    //Serial.println(iDots);

  }
  else
  {
    iDots = 20;
    sprintf(strLine[3], "%20s", "start press 3s \"S\" ");
    updateDisplay(false, 3);
  }
}
void singleClick_1()
{
  Serial.println("Single Click Button 1");
//  Serial.println(minutes);
  delay(100);
} // singleClick Add minutes


void doubleClick_1()
{
  Serial.println("Double Click Button 1");

  delay(100);  

} // doubleClick Timer Start

void longPressStart_1()
{
  Serial.println("long press Button 1");
  iTimeRemain = iTeaTimeSec = 60*iStoredMin + iStoredSec;
  bRunning = true;
  delay(100);  
} // longPressStart Timer Reset