/*
   Created by ArduinoGetStarted.com

   This example code is in the public domain

   Tutorial page: https://arduinogetstarted.com/faq/how-to-input-a-multiple-digits-number-using-the-keypad
*/
#include <SPI.h>

#include <Keypad.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27, 20, 4); // set the LCD address to 0x27 for a 16 chars and 2 line display


const int ROW_NUM = 4; //four rows
const int COLUMN_NUM = 4; //four columns

char keys[ROW_NUM][COLUMN_NUM] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte pin_rows[ROW_NUM] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte pin_column[COLUMN_NUM] = {5, 4, 3, 2}; //connect to the column pinouts of the keypad

Keypad keypad    = Keypad( makeKeymap(keys), pin_rows, pin_column, ROW_NUM, COLUMN_NUM );
String inputString;
String inputStringA;
String inputStringB;
String inputStringC;
String inputStringD;
int inputInt = 0;
long GrindAmount;
long WaterRatio;
long BrewAmount;
long inputIntD = 0;
int IntCountA = 0;
boolean Step1 = true;
boolean Step2 = false;
boolean Step3 = false;
boolean Step4 = false;
boolean Step5 = false;
boolean Step6 = false;
//int BrewAmount = 0;
//long P1;
//long P2;
//int P3;
//int P4;
//int P5;
int Rest1 = 10000;
int Rest2 = 10000;
int Rest3 = 10000;
int Rest4 = 10000;
int Rest5 = 10000;
float dripratio1 = .235;
float dripratio2 = .19125;
float pumprate = 7.4;
int waittime = 1000;
int button;
int brew = 0;
//char key;
char keyA;
char keyB;
char key;


void setup() {
  Serial.begin(9600);
  lcd.init();                      // initialize the lcd
  // Print a message to the LCD.
  lcd.backlight();
  lcd.setCursor(7, 0);
  lcd.println("Hello");
  lcd.setCursor(3, 1);
  lcd.println("Coffee Snobs");
  lcd.display();
  delay(100); // DELAY //
  lcd.setCursor(4, 2);
  lcd.println("Lets make a");
  lcd.setCursor(0, 3);
  lcd.println("Great cup of Coffee");
  lcd.display();
  delay(500); // DELAY //
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.println("How much coffee did");
  lcd.setCursor(0, 1);
  lcd.println("you grind?");
  lcd.setCursor(0, 3);
  lcd.print("Press # to log");





}


void loop() {

  char key = keypad.getKey();
  if (key >= '0' && key <= '9')// only act on numeric keys
  {
    inputString += key; // append new character to input string
  }
  else if (key == '#') {
    if (Step4) { //IntCountA = IntCountA +1;
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.println("Step 4");
      lcd.display();
      lcd.setCursor(0, 1);
      float P1 = (dripratio1 * BrewAmount);
      float P2 = (P1 / pumprate);
      float P3 = (P2 * waittime);
      lcd.print("Coffee Setup: ");
      lcd.print(P1);
      lcd.setCursor(0, 2);
      lcd.println(P2);
      lcd.setCursor(0, 3);
      lcd.println(P3);
      
      //lcd.print("g");
      //lcd.setCursor(0, 2);
      //lcd.print("Brewing Ratios: 1/");
      //lcd.print(WaterRatio);
      //lcd.setCursor(0, 2);
      //lcd.print("Brew Recipe: ");
      //lcd.print(BrewAmount);
      //lcd.print("ml");
    

      lcd.display();



      Step4 = false;
    }

    if (Step3) { //IntCountA = IntCountA +1;
      lcd.clear();

      lcd.setCursor(0, 0);
      lcd.println("Coffee Snob Recipe");
      lcd.display();

      lcd.setCursor(0, 1);
      BrewAmount = (GrindAmount * WaterRatio);
      lcd.print("Coffee Setup: ");
      lcd.print(GrindAmount);
      lcd.print("g");
      lcd.setCursor(0, 2);
      lcd.print("Brewing Ratios: 1/");
      lcd.print(WaterRatio);
      lcd.setCursor(0, 2);
      lcd.print("Brew Recipe: ");
      lcd.print(BrewAmount);
      lcd.print("ml");
      lcd.println();

      lcd.display();


      Step3 = false;
      Step4 = true;
    }
    if (inputString.length() > 0) {
      if (Step2) {
        WaterRatio = inputString.toInt(); // YOU GOT AN INTEGER NUMBER
        inputString = "";// clear input
        Serial.println(WaterRatio);
        lcd.setCursor(0, 2);

        lcd.print("1/");
        lcd.print(WaterRatio);
        lcd.print("oz");
        lcd.display();
        Step2 = false;
        Step3 = true;
        delay(1000);
        lcd.clear();
        lcd.display();
        lcd.setCursor(0, 0);
        lcd.print("Press # to view");
        lcd.setCursor(0, 1);
        lcd.print("Brew Recipe");
        lcd.display();
        Serial.println(Step2);
        Serial.println(Step3);


      }
      if (Step1) {
        GrindAmount = inputString.toInt(); // YOU GOT AN INTEGER NUMBER
        inputString = "";// clear input
        Serial.println(GrindAmount);
        lcd.setCursor(0, 2);
        lcd.print(GrindAmount);
        lcd.print("grams");

        lcd.display();
        Step1 = false;
        Step2 = true;
        delay(1000);
        lcd.clear();
        lcd.display();

        lcd.setCursor(0, 0);
        lcd.println("What is your ");
        lcd.setCursor(0, 1);
        lcd.println("brew ratio?");
        lcd.setCursor(0, 3);
        lcd.print("Press # to log");
        lcd.display();
        Serial.println(Step1);
        Serial.println(Step2);
      }

    }
  }

  if (key == '*') {
    Serial.println("Clear");
    lcd.clear();


    Step1 = true;
    Step2 = false;
    Step3 = false;
    Step4 = false;
    setup();
  }
}