#include <LiquidCrystal.h>
#include <Keypad.h>

//LCD Display Anschließen:
LiquidCrystal lcd(16,17,18,19,20,21);


//Keypad anschließen:
const uint8_t ROWS = 4;
const uint8_t COLS = 4;
char Taste[ROWS][COLS] = {
  { '1', '2', '3', 'A' },
  { '4', '5', '6', 'B' },
  { '7', '8', '9', 'C' },
  { '*', '0', '#', 'D' }
};

uint8_t colPins[COLS] = { 5, 4, 3, 2 };
uint8_t rowPins[ROWS] = { 9, 8, 7, 6 };

Keypad keypad = Keypad(makeKeymap(Taste), rowPins, colPins, ROWS, COLS);

//LED pins definieren
const int Button=13;
const int LED1R=A15;
const int LED1G=A14;
const int LED1B=A13;

const int LED2R=A12;
const int LED2G=A11;
const int LED2B=A10;

const int LED3R=A9;
const int LED3G=A8;
const int LED3B=A7;

const int LED4R=A6;
const int LED4G=A5;
const int LED4B=A4;

int status = 0;
int lauf = 0;
int difA = 0;
int difB = 0;
int difC = 0;
const int ON = 1024;
const int OFF = 0;
int ein1 = -5;
int ein2 = -5;
int ein3 = -5;
int ein4 = -5;

char difficulty = 'z';

void setup() 
{
  Serial.begin(9600);
  lcd.begin(16,2);

  //LED Outputs
  pinMode(LED1R,OUTPUT);
  pinMode(LED1G,OUTPUT);
  pinMode(LED1B,OUTPUT);  
  pinMode(LED2R,OUTPUT);
  pinMode(LED2G,OUTPUT);
  pinMode(LED2B,OUTPUT);
  pinMode(LED3R,OUTPUT);
  pinMode(LED3G,OUTPUT);
  pinMode(LED3B,OUTPUT);
  pinMode(LED4R,OUTPUT);
  pinMode(LED4G,OUTPUT);
  pinMode(LED4B,OUTPUT);
}

void loop()
{
  if(status == 0)
  {
    lcd.clear();
    lcd.print("WELCOME");
    delay(2000);
    status = 1;
  }
  if(status == 1)
  {
    lcd.clear();
    lcd.print("Press a Button");
    lcd.setCursor(0,1);
    lcd.print("to start");
    status = 2;
  }
  if(status == 2)
  { 
    char startbutton = keypad.getKey();
    if(startbutton != NO_KEY)
    {
      status = 3;
    }
  }
  if(status == 3)
  {
    lcd.clear();
    lcd.print("Select a");
    lcd.setCursor(0,1);
    lcd.print("difficulty...");
    delay(1700);
    status = 4;
  }
  if(status == 4)
  {
    lcd.clear();
    lcd.print("by pressing");
    lcd.setCursor(0,1);
    lcd.print("A, B or C:");
    status = 5;
  }
  if(status == 5)
  { 
    difficulty = keypad.getKey();
    if(difficulty == 'A' || difficulty == 'B' || difficulty == 'C')
    {
      lcd.clear();
      lcd.print("Selected");
      lcd.setCursor(0,1);
      lcd.print("difficulty: ");
      lcd.print(difficulty);
      
      status = 6; 
    }
  }
  if(status == 6)
  {
    int ran1 = random(1,10);
    int ran2 = random(1,10);
    int ran3 = random(1,10);
    int ran4 = random(1,10);
    if(difficulty == 'A')
    {
      if(difA == 0)
      {
        lcd.clear();
        lcd.print(difficulty);
        lcd.print(" is the easiest");
        lcd.setCursor(0,1);
        lcd.print("Mode...");
        delay(2500);
        lcd.clear();
        lcd.print("That means:");
        delay(2500);
        lcd.clear();
        lcd.print("Red = False");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(3000);
        lcd.clear();
        lcd.print("Yellow = right");
        lcd.setCursor(0,1);
        lcd.print("num, false pos");
        delay(3000);
        lcd.clear();
        lcd.print("Green = right");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(5000);
        lcd.clear();
        lcd.print("    Lets go!    ");
        delay(3000);
        difA = 1;
      }
      if(difA == 1)
      {
        Serial.print(lauf);
        if(lauf == 0)
        {
          lcd.clear();
          lcd.print("Select Numbers");
          lcd.setCursor(0,1);
          lcd.print("from 0 - 9:");
          delay(2500);
          lcd.clear();
          lcd.cursor();
          lauf = 1;
        }
        int ein1 = keypad.getKey() - '0';
        if(lauf == 1 && ein1 <= 9 && ein1 >= 1)
        {
          int ein1 = keypad.getKey();
          lcd.print(ein1);
          lauf = 2;
        }
        if(lauf == 2 && keypad.getKey() > -1 && keypad.getKey() < 10)
        {
          int ein2 = keypad.getKey();
          lcd.print(ein2);
          lauf = 3;
        }
        if(lauf == 3 && keypad.getKey() > -1 && keypad.getKey() < 10)
        {
          int ein3 = keypad.getKey();
          lcd.print(ein3);
          lauf = 4;
        }
        if(lauf == 4 && keypad.getKey() > -1 && keypad.getKey() < 10)
        {
          int ein4 = keypad.getKey();
          lcd.print(ein4);
          lauf = 5;
        }
        if(lauf == 5)
        {
          lcd.setCursor(0,1);
          lcd.print("Check Numbers:");
          lauf = 6;
        }
        if(lauf == 6)
        {
          if(ein1 == ran1)
          {
            analogWrite(LED1G,ON);
          }
          if(ein1 == ran2 || ein1 == ran3 || ein1 == ran4)
          {
             analogWrite(LED1G, ON);
             analogWrite(LED1R, ON);
          }
          else{}

        }
        
        
      }
      
    }
    if(difficulty == 'B')
    {
      if(difB == 0)
      {
        lcd.clear();
        lcd.print(difficulty);
        lcd.print(" is the easiest");
        lcd.setCursor(0,1);
        lcd.print("Mode...");
        delay(2500);
        lcd.clear();
        lcd.print("That means:");
        delay(2500);
        lcd.clear();
        lcd.print("Red = False");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(3000);
        lcd.clear();
        lcd.print("Yellow = right");
        lcd.setCursor(0,1);
        lcd.print("num, false pos");
        delay(3000);
        lcd.clear();
        lcd.print("Green = right");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(5000);
        lcd.clear();
        lcd.print("    Lets go!    ");
        delay(3000);
      }
    }
    if(difficulty == 'C')
    {
      if(difC == 0)
      {
        lcd.clear();
        lcd.print(difficulty);
        lcd.print(" is the easiest");
        lcd.setCursor(0,1);
        lcd.print("Mode...");
        delay(2500);
        lcd.clear();
        lcd.print("That means:");
        delay(2500);
        lcd.clear();
        lcd.print("Red = False");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(3000);
        lcd.clear();
        lcd.print("Yellow = right");
        lcd.setCursor(0,1);
        lcd.print("num, false pos");
        delay(3000);
        lcd.clear();
        lcd.print("Green = right");
        lcd.setCursor(0,1);
        lcd.print("num and pos");
        delay(5000);
        lcd.clear();
        lcd.print("    Lets go!    ");
        delay(3000);
      }
    }
  } 
}