// storm in a box too
// pkvi
#include <FastLED.h>
#define NUM_LEDS 30
#define DATA_PIN 0
enum Mode {CLOUD, OFF, ON, RED, GREEN, BLUE, FADE};
Mode mode = CLOUD;
Mode lastMode = CLOUD;
int fade_h;
int fade_direction = 1;
CRGB leds[NUM_LEDS];
void setup() {
  FastLED.addLeds<WS2812B, DATA_PIN, GRB>(leds, NUM_LEDS);
  for (int w = 0; w < 255; w++) {
    glow(0, 0, w);
    w = w + 5;
    delay(1);
  }
  for (int w = 255; w > 0; w--) {
    glow(0, 0, w);
    w = w - 5;
    delay(1);
  }
}
void loop() {
  int pot = analogRead(1);
  if (pot > 500) {
    constant_lightning();
  } else if (pot < 500 && pot > 100) {
    for (int w = 0; w < 255; w++) {
      glow(0, 0, w);
      w = w + 5;
      delay(1);
    }
    for (int w = 255; w > 0; w--) {
      glow(0, 0, w);
      w = w - 5;
      delay(1);
    }
  } else {
    glow(0, 0, 0);
    // off
  }
}
void constant_lightning() {
  switch (random(1, 3)) {
    case 1:
      thunderburst();
      delay(random(10, 500));
      break;
    case 2:
      rolling();
      break;
    case 3:
      crack();
      delay(random(50, 250));
      break;
  }
}
void reset() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CHSV( 0, 0, 0);
  }
  FastLED.show();
}
void rolling() {
  for (int r = 0; r < random(2, 10); r++) {
    for (int i = 0; i < NUM_LEDS; i++) {
      if (random(0, 100) > 90) {
        leds[i] = CHSV( 0, 0, 255);
      }
      else {
        leds[i] = CHSV(0, 0, 0);
      }
    }
    FastLED.show();
    delay(random(5, 100));
    reset();
  }
}
void crack() {
  for (int i = 0; i < NUM_LEDS; i++) {
    leds[i] = CHSV( 0, 0, 255);
  }
  FastLED.show();
  delay(random(10, 100));
  reset();
}
void thunderburst() {
  int rs1 = random(0, NUM_LEDS / 2);
  int rl1 = random(10, 20);
  int rs2 = random(rs1 + rl1, NUM_LEDS);
  int rl2 = random(10, 20);
  for (int r = 0; r < random(3, 6); r++) {
    for (int i = 0; i < rl1; i++) {
      leds[i + rs1] = CHSV( 0, 0, 255);
    }
    if (rs2 + rl2 < NUM_LEDS) {
      for (int i = 0; i < rl2; i++) {
        leds[i + rs2] = CHSV( 0, 0, 255);
      }
    }
    FastLED.show();
    delay(random(10, 50));
    reset();
    delay(random(10, 50));
  }
}