#include "FastLED/FastLED.h"
#define NUM_LEDS 12

FASTLED_USING_NAMESPACE;

CRGB leds[NUM_LEDS];

SYSTEM_MODE(MANUAL);

//int debug_led = D7;
int tmp = 0;
int up = 1;
int mode = 1;
int my_delay = 500;

int set_mode(String str) {
    mode = atoi(str);
    return 1;
}


int set_delay(String str) {
    my_delay = atoi(str);
    return 1;
}

void setup() {
    Serial.begin(9600);
    Serial.println("in setup");
    connect();
    Particle.function("set_mode", set_mode);
    Particle.function("set_delay", set_delay);
    FastLED.addLeds<NEOPIXEL, D6>(leds, NUM_LEDS);
}

void loop() {
  do_mode();
  if (try_process() != 1) {
    delay(my_delay);
  }

  FastLED.show();
}

void connect () {
    if (Particle.connected() == false) {
        Serial.println("connecting");
        Particle.connect();
    }
}

int try_process () {
    static unsigned long old = 0;
    unsigned long now = millis();
    unsigned long odiff = now - old;

    if (odiff > 2000UL) {
        connect();
        Particle.process();
        unsigned long diff = millis() - old;

        Serial.println(millis());
        Serial.println(now);
        Serial.println(old);
        Serial.println(odiff);
        Serial.println(diff);

        old = now;
        if (diff > my_delay) {
            Serial.println("skipping delay");
            return 0;
        }
        return 1;
    }

    return 1;
}

void do_mode () {
    switch (mode) {
        case 0:
            off();
            break;
        case 1:
            night_rider();
            break;
        default:
            night_rider();
    }
}

void off () {
    for (int i = 0; i < NUM_LEDS; i++) {
        leds[i] = CRGB::Black;
    }
}

void night_rider() {
  for (int i = 0; i < NUM_LEDS; i++) {
    if (i == tmp) {
      leds[i] = CRGB::Red;
    } else {
      leds[i] = CRGB::Black;
    }
  }

  if (up) {
    tmp++;
  } else {
    tmp--;
  }

  if (tmp >= NUM_LEDS) {
    up = 0;
    tmp = NUM_LEDS - 2;
  }

  if (tmp < 0) {
    up = 1;
    tmp = 0;
  }
}