#include <LiquidCrystal.h> // Include the LiquidCrystal library

LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // Initialize the LCD with the appropriate pins

// Define button pins
const int blackButton = 8;
const int brownButton = 9;
const int redButton = 10;
const int goldButton = 11;

// Resistor color codes
const char* colors[] = {"Black", "Brown", "Red", "Orange", "Yellow", "Green", "Blue", "Violet", "Gray", "White"};

// Resistor values
int resistorValues[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};

// Variables to store selected colors
int band1Color = -1;
int band2Color = -1;
int multiplierColor = -1;
int toleranceColor = -1; // You can add more bands for tolerance if needed

void setup() {
  // Set button pins as INPUT_PULLUP
  pinMode(blackButton, INPUT_PULLUP);
  pinMode(brownButton, INPUT_PULLUP);
  pinMode(redButton, INPUT_PULLUP);
  pinMode(goldButton, INPUT_PULLUP);

  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.setCursor(0, 0);
  lcd.print("Enter Resistor:");
}

void loop() {
  // Read button states and update selected colors
  updateSelectedColors();

  // If all colors are selected, calculate and display resistor value
  if (band1Color != -1 && band2Color != -1 && multiplierColor != -1 && toleranceColor != -1) {
    int resistorValue = (band1Color * 10 + band2Color) * resistorValues[multiplierColor];

    // Display resistor value on LCD
    lcd.setCursor(0, 1);
    lcd.print("                "); // Clear the line
    lcd.setCursor(0, 1);
    lcd.print("Value: ");
    lcd.print(resistorValue);
  }
}

void updateSelectedColors() {
  band1Color = readColor(blackButton);
  band2Color = readColor(brownButton);
  multiplierColor = readColor(redButton);
  toleranceColor = readColor(goldButton);
  // You can add more bands and buttons for additional accuracy.
}

int readColor(int buttonPin) {
  int buttonState = digitalRead(buttonPin);
  if (buttonState == LOW) {
    // Button is pressed, cycle through colors
    while (digitalRead(buttonPin) == LOW); // Wait for button release
    return (buttonState == LOW) ? 0 : 1; // Return 0 (Black) or 1 (Brown)
  }
  return -1; // Default to -1 when the button is not pressed
}