#include "FastLED.h"
#include <EEPROMex.h>

#define NUM_LEDS 8
CRGB leds[NUM_LEDS];
#define PIN 3

#define BTN_SPEED 4
#define BTN_BRIGHT 2

uint8_t speed[] = {30, 70, 100};
uint8_t bright[] = {100};

uint8_t buttonStateSpeed;
uint8_t buttonStateBright;

uint8_t defaultSpeed = 30;
uint8_t defaultBright = 100;

uint8_t lastButtonStateSpeed = HIGH;
uint8_t lastButtonStateBright = HIGH;

unsigned long lastDebounceTime = 0;
unsigned long debounceDelay = 40;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  digitalWrite(LED_BUILTIN, HIGH);

  pinMode(BTN_SPEED, INPUT);
  digitalWrite(BTN_SPEED, HIGH);

  pinMode(BTN_BRIGHT, INPUT);
  digitalWrite(BTN_BRIGHT, HIGH);

  FastLED.addLeds<WS2812B, PIN, GRB>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip );
}

void loop() {
  Fire(15, 40, 60);
}

void showStrip() {
  FastLED.show();
}

void setPixel(int Pixel, byte red, byte green, byte blue) {
  leds[Pixel].r = red;
  leds[Pixel].g = green;
  leds[Pixel].b = blue;
}

void setAll(byte red, byte green, byte blue) {
  for (int i = 0; i < NUM_LEDS; i++ ) {
    setPixel(i, red, green, blue);
  }
  showStrip();
}

void Fire(int Cooling, int Sparking, int SpeedDelay) {
  static byte heat[NUM_LEDS];
  int cooldown;

  // Step 1.  Cool down every cell a little
  for ( int i = 0; i < NUM_LEDS; i++) {
    cooldown = random(0, ((Cooling * 10) / NUM_LEDS) + 2);

    if (cooldown > heat[i]) {
      heat[i] = 0;
    } else {
      heat[i] = heat[i] - cooldown;
    }
  }

  // Step 2.  Heat from each cell drifts 'up' and diffuses a little
  for ( int k = NUM_LEDS - 1; k >= 2; k--) {
    heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2]) / 3;
  }

  // Step 3.  Randomly ignite new 'sparks' near the bottom
  if ( random(255) < Sparking ) {
    int y = random(7);
    //heat[y] = heat[y] + random(160, 255);
    heat[y] = random(160,255);
  }

  // Step 4.  Convert heat to LED colors
  for ( int j = 0; j < NUM_LEDS; j++) {
    setPixelHeatColor(j, heat[j] );
  }

  showStrip();
  delay(SpeedDelay);

}

void setPixelHeatColor (int Pixel, byte temperature) {
  // Scale 'heat' down from 0-255 to 0-191
  byte t192 = round((temperature / 255.0) * 191);

  // calculate ramp up from
  byte heatramp = t192 & 0x3F; // 0..63
  heatramp <<= 2; // scale up to 0..252

  //dimm to the desired brightness
  float mod = 100 / 100.0;

  // figure out which third of the spectrum we're in:
  if ( t192 > 0x80) {                    // hottest
    setPixel(Pixel, 255 * mod, 255 * mod, heatramp * mod);
  } else if ( t192 > 0x40 ) {            // middle
    setPixel(Pixel, 255 * mod, heatramp * mod, 0);
  } else {                               // coolest
    setPixel(Pixel, heatramp * mod, 0, 0);
  }
}