// Code Purpose:
// It is a simple game where a random message is generated asking the user to
// click on a specific button
// if the user clicked the correct button, "Yesssss" will be shown
// if the user clicked the wrong button, "Noooo" will be shown
// and the game will repeat itself

#include <LiquidCrystal_I2C.h>
#define LCD_address 0x27
#define LCD_columns 16
#define LCD_rows 2
LiquidCrystal_I2C lcd(LCD_address, LCD_columns , LCD_rows ); 

#define greenButton 13 
#define redButton 12

unsigned long lastMillis = 0;
bool greenWasPressed = false;
bool redWasPressed = false;
void setup() 
{
  lcd.init(); // initialize the LCD 
  lcd.backlight(); // open the backlight 
  Serial.begin(115200);

  pinMode(greenButton, INPUT_PULLUP);
  pinMode(redButton, INPUT_PULLUP);
}

void loop()
{
  // Getting a random number and show a message to the user
  int randomNumber = random(1,3);
  generateMessage(randomNumber);

  // Looping till the user provide an answer
  lastMillis = millis();
  while(true)
  {
    // If a second passed and no answer yet, then print a dot
    if(millis() - lastMillis > 1000)
    {
      Serial.print(". ");
      lastMillis = millis();
    }

    // If a button was pressed then get out of the loop
    if(digitalRead(greenButton) == LOW)
    {
      greenWasPressed = true;
      redWasPressed = false;
      break;
    }
    else if(digitalRead(redButton) == LOW)
    {
      greenWasPressed = false;
      redWasPressed = true;
      break;
    }
  }

  // Show the result of the user action
  generateAnswer(greenWasPressed, redWasPressed, randomNumber);
  Serial.println();
  delay(1000);
}

// Generate the message on the lcd for the user based on a number [1 or 2]
void generateMessage(int number)
{
  lcd.clear();
  lcd.setCursor(0,0);
  if(number == 1)
  {
    lcd.print("Hit the G button");
  }
  else if(number == 2)
  {
    lcd.print("Hit the R button");
  }
  else
  {
    lcd.print("Error!!");
  }
}

// generate the answer on the lcd for the user based on what the user clicked
void generateAnswer(bool wasItGreen, bool wasItRed, int number)
{
  lcd.setCursor(0,1);
  if(wasItGreen && number == 1)
  {
    lcd.print("Yessssss Green");
  }
  else if(wasItRed && number == 2)
  {
    lcd.print("Yessssss Red");
  }
  else
  {
    lcd.print("Noooooo");
  }
}