#include <Adafruit_NeoPixel.h>

// NeoPixel 燈環參數
#define PIN 15        // NeoPixel 控制腳位
#define NUMPIXELS 16  // 燈環中的 LED 數量
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

// LED 和按鈕腳位
#define BUTTON_PIN_O 25  // 按鈕 O
#define BUTTON_PIN_B 26  // 按鈕 B
#define LED_PIN_O    32  // LED O
#define LED_PIN_B    33  // LED B

// 去彈跳參數
unsigned long lastDebounceTime_O = 0;
unsigned long lastDebounceTime_B = 0;
const unsigned long debounceDelay = 50; // 50ms 去彈跳時間

bool buttonState_O = false; 
bool buttonState_B = false;

void setup() 
{
    // 初始化 NeoPixel
    pixels.begin();
    pixels.clear();
    pixels.show();

    // 設置按鈕和 LED 腳位
    pinMode(BUTTON_PIN_O, INPUT_PULLUP); // 按鈕使用內建上拉電阻
    pinMode(BUTTON_PIN_B, INPUT_PULLUP);
    pinMode(LED_PIN_O, OUTPUT);
    pinMode(LED_PIN_B, OUTPUT);

    // 關閉 LED
    digitalWrite(LED_PIN_O, LOW);
    digitalWrite(LED_PIN_B, LOW);
}

void loop() 
{
    // 檢測按鈕狀態並去彈跳
    bool currentButtonState_O = !digitalRead(BUTTON_PIN_O); // 按鈕被按下時為 LOW，取反
    bool currentButtonState_B = !digitalRead(BUTTON_PIN_B);

    if (currentButtonState_O && (millis() - lastDebounceTime_O > debounceDelay)) 
    {
        lastDebounceTime_O = millis();
        buttonState_O = true;
    }
    else if (!currentButtonState_O) 
    {
        buttonState_O = false;
    }

    if (currentButtonState_B && (millis() - lastDebounceTime_B > debounceDelay))
      {
        lastDebounceTime_B = millis();
        buttonState_B = true;
      }
     else if (!currentButtonState_B) 
     {
        buttonState_B = false;
     }

    // 按鈕 O 的動作
    if (buttonState_O) 
    {
        digitalWrite(LED_PIN_O, HIGH);
        pixels.clear();
        for (int i = 0; i < NUMPIXELS; i++) 
        {
            pixels.setPixelColor(i, pixels.Color(255, 0, 255)); // 紫色
            pixels.show();
            delay(200); // 延遲時間
        }
        pixels.clear();
        pixels.show();
    } 
    else 
    {
        digitalWrite(LED_PIN_O, LOW);
    }

    // 按鈕 B 的動作
    if (buttonState_B)
     {
        digitalWrite(LED_PIN_B, HIGH);
        pixels.clear();
        for (int i = NUMPIXELS - 1; i >= 0; i--) 
        {
            pixels.setPixelColor(i, pixels.Color(0, 255, 255)); // 青色
            pixels.show();
            delay(200); // 延遲時間
        }
        pixels.clear();
        pixels.show();
    } 
    else
     {
        digitalWrite(LED_PIN_B, LOW);
    }
}