#include <Adafruit_NeoPixel.h>

// 定义开关连接的引脚
const int switchPin = 4;
// 定义灯带连接的引脚
const int ledPin = 6;
// 定义灯带的灯珠数量
const int numLEDs = 16;
// 定义 NeoPixel 对象
Adafruit_NeoPixel strip(numLEDs, ledPin, NEO_GRB + NEO_KHZ800);

// 存储开关的状态
int switchState = 0;
// 存储上一次开关的状态
int lastSwitchState = HIGH;
// 存储灯带的状态
bool ledStripOn = false;

// 定时器相关变量
unsigned long previousMillis = 0;
const long interval = 3000; // 3 秒的间隔

void setup() {
    // 初始化串口通信，波特率为 9600
    Serial.begin(9600);
    // 将开关引脚设置为输入模式
    pinMode(switchPin, INPUT_PULLUP);
    // 初始化灯带
    strip.begin();
    strip.show();
}

void loop() {
    // 读取开关的状态
    switchState = digitalRead(switchPin);

    // 判断开关状态是否发生变化
    if (switchState != lastSwitchState) {
        // 延迟一小段时间以消除抖动
        delay(50);
        // 再次读取开关状态以确认
        switchState = digitalRead(switchPin);
        if (switchState != lastSwitchState) {
            if (switchState == LOW) {
                // 开关按下，切换灯带状态
                ledStripOn = !ledStripOn;
                if (ledStripOn) {
                    // 灯带打开，设置所有灯珠为白色
                    for (int i = 0; i < numLEDs; i++) {
                        strip.setPixelColor(i, strip.Color(255, 255, 255));
                    }
                    Serial.println("WS2812 LED strip is turned on!");
                } else {
                    // 灯带关闭，设置所有灯珠为黑色
                    for (int i = 0; i < numLEDs; i++) {
                        strip.setPixelColor(i, strip.Color(0, 0, 0));
                    }
                    Serial.println("WS2812 LED strip is turned off!");
                }
                // 更新灯带显示
                strip.show();
            }
            // 更新上一次的开关状态
            lastSwitchState = switchState;
        }
    }

    // 定时器逻辑
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
        previousMillis = currentMillis;
        // 每隔 3 秒自动点亮灯带
        ledStripOn = true;
        for (int i = 0; i < numLEDs; i++) {
            strip.setPixelColor(i, strip.Color(255, 255, 255));
        }
        Serial.println("WS2812 LED strip is automatically turned on!");
        strip.show();
    }
}