// 06-Comet Effect - LED Strip Arduino Tutorial - FastLED Effects - on RGB LED WS2812B and Neopixels
// https://www.youtube.com/watch?v=yM5dY7K2KHM&list=RDCMUCNzszbnvQeFzObW0ghk0Ckw&start_radio=1

// 設定步驟
// include lib
// include header
// set led_pin
// set num_leds
// call addleds()
// call show()

#include <Arduino.h>
#define FASTLED_INTERNAL
#include <FastLED.h>
#define NUM_LEDS 45          // FastLED definitions
#define LED_PIN 5

CRGB g_LEDs[NUM_LEDS] = {0}; // Frame buffer for FastLED
int g_Brightness = 64;       //0-255 brightness scale

//#include "marque.h"
//#include "twinkle.h"

// 計算幀數
double FramesPerSecond(double seconds){
  static double framesPerSecond;
  framesPerSecond = (framesPerSecond * .9)+(1.0 / seconds * .1);
  return framesPerSecond;
}

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(LED_PIN, OUTPUT);

  Serial.begin(115200);
  while(!Serial){}
  Serial.print("Arduino Startup");

  FastLED.addLeds<WS2812B, LED_PIN, GRB>(g_LEDs, NUM_LEDS); // Add our LED strip to the FastLED library
  FastLED.setBrightness(64);
}

void loop() {
  bool bLED = 0;
  double fps = 0;

  uint8_t initialHue = 0;
  const uint8_t deltaHue = 16;
  const uint8_t hueDensity = 4;

  for(;;){
    bLED = !bLED;
    digitalWrite(LED_BUILTIN, bLED);

    double dStart = millis() / 1000.0;

    // Handle LEDs
    //DrawMarquee();
    //DrawTwinkle();
    /*
    for(int i = 0; i < NUM_LEDS; i++){
      //g_LEDs[i] = CRGB::Red;
      g_LEDs[i] = CRGB::White;
    }
    */
    //fill_solid(g_LEDs, NUM_LEDS, CRGB::Green);
    fill_rainbow(g_LEDs, NUM_LEDS, initialHue += hueDensity, deltaHue);
    FastLED.setBrightness(g_Brightness);
    delay(34);
    FastLED.show();

    double dEnd = millis() / 1000.0;
    fps = FramesPerSecond(dEnd - dStart);
    Serial.print("FPS: ");
    Serial.println(fps);
    
  }
}