//navigation
#include <RotaryEncoder.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#include <SPI.h>
#include <Adafruit_NeoPixel.h>


// --------------------------
// TFT Display Pin Definitions
// --------------------------
#define TFT_CS   17
#define TFT_DC   15
#define TFT_RST  16

Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);

// --------------------------
// Rotary Encoder Pin Definitions
// --------------------------
#define ENCODER_CLK 2   // Encoder A (CLK)
#define ENCODER_DT  3   // Encoder B (DT)
#define ENCODER_SW  4   // Encoder push button

// Create rotary encoder instance (using a common latch mode)
RotaryEncoder encoder(ENCODER_CLK, ENCODER_DT, RotaryEncoder::LatchMode::TWO03);

// --------------------------
// LED Ring Definitions
// --------------------------
#define LED_PIN   5       // Pin for LED ring data (choose a free pin)
#define NUM_LEDS  8

Adafruit_NeoPixel ledRing = Adafruit_NeoPixel(NUM_LEDS, LED_PIN, NEO_GRB + NEO_KHZ800);

// --------------------------
// Global variables
// --------------------------
int lastPos = 0;
int currentLEDIndex = 0; // 0-based index for LED ring

// --------------------------
// Function to update the LED ring: only one LED is lit
// --------------------------
void updateLedRing() {
  // Turn off all LEDs
  for (int i = 0; i < NUM_LEDS; i++) {
    ledRing.setPixelColor(i, 0);
  }
  // Light the current LED (using white as an example)
  ledRing.setPixelColor(currentLEDIndex, ledRing.Color(255, 255, 255));
  ledRing.show();
}

void setup() {
  Serial.begin(115200);
  
  // Initialize TFT display
  tft.begin();
  tft.setRotation(1); // Adjust rotation if needed
  tft.fillScreen(ILI9341_BLACK);
  
  // Initialize rotary encoder push button
  pinMode(ENCODER_SW, INPUT_PULLUP);
  
  // Initialize encoder position
  encoder.setPosition(0);
  lastPos = 0;
  
  // Initialize LED ring
  ledRing.begin();
  ledRing.show();  // Turn off all LEDs initially
  currentLEDIndex = 0;
  updateLedRing();
}

void loop() {
  // Update rotary encoder state
  encoder.tick();
  int newPos = encoder.getPosition();
  
  if (newPos != lastPos) {
    // Clear TFT display
    tft.fillScreen(ILI9341_BLACK);
    
    // Set text parameters
    tft.setCursor(20, 150);
    tft.setTextColor(ILI9341_WHITE);
    tft.setTextSize(3);
    
    if (newPos > lastPos) {
      tft.println("Turn Right");
      // Rotate right: increment LED index, wrapping around
      currentLEDIndex = (currentLEDIndex + 1) % NUM_LEDS;
    } else {
      tft.println("Turn Left");
      // Rotate left: decrement LED index, wrapping around
      currentLEDIndex = (currentLEDIndex - 1 + NUM_LEDS) % NUM_LEDS;
    }
    lastPos = newPos;
    updateLedRing();
  }
  
  // Check if button is pressed (active LOW)
  if (digitalRead(ENCODER_SW) == LOW) {
    // Clear TFT display and show button message
    tft.fillScreen(ILI9341_BLACK);
    tft.setCursor(20, 150);
    tft.setTextColor(ILI9341_WHITE);
    tft.setTextSize(3);
    tft.println("Button Pressed");
    
    // Reset LED ring: set to original state (only LED 0 lit)
    currentLEDIndex = 0;
    updateLedRing();
    
    // Debounce delay and wait until button is released
    delay(300);
    while (digitalRead(ENCODER_SW) == LOW) {
      delay(10);
    }
    delay(300);
  }
  
  delay(10); // Small delay to reduce CPU load
}