#ifndef __INC_CLOCKLESS_ARM_NRF51
#define __INC_CLOCKLESS_ARM_NRF51

#if defined(NRF51)

#include "nrf51_bitfields.h"
#define FASTLED_HAS_CLOCKLESS 1

#if (FASTLED_ALLOW_INTERRUPTS==1)
#define SEI_CHK LED_TIMER->CC[0] = (WAIT_TIME * (F_CPU/1000000)); LED_TIMER->TASKS_CLEAR; LED_TIMER->EVENTS_COMPARE[0] = 0;
#define CLI_CHK cli(); if(LED_TIMER->EVENTS_COMPARE[0]) { LED_TIMER->TASKS_STOP = 1; return 0; }
#define INNER_SEI sei();
#else
#define SEI_CHK
#define CLI_CHK
#define INNER_SEI delaycycles<1>();
#endif


#include "platforms/arm/common/m0clockless.h"
template <uint8_t DATA_PIN, int T1, int T2, int T3, EOrder RGB_ORDER = RGB, int XTRA0 = 0, bool FLIP = false, int WAIT_TIME = 100>
class ClocklessController : public CLEDController {
  typedef typename FastPinBB<DATA_PIN>::port_ptr_t data_ptr_t;
  typedef typename FastPinBB<DATA_PIN>::port_t data_t;

  data_t mPinMask;
  data_ptr_t mPort;
  CMinWait<WAIT_TIME> mWait;
public:
  virtual void init() {
    FastPinBB<DATA_PIN>::setOutput();
    mPinMask = FastPinBB<DATA_PIN>::mask();
    mPort = FastPinBB<DATA_PIN>::port();
  }

	virtual uint16_t getMaxRefreshRate() const { return 400; }

  virtual void clearLeds(int nLeds) {
    showColor(CRGB(0, 0, 0), nLeds, 0);
  }

  // set all the leds on the controller to a given color
  virtual void showColor(const struct CRGB & rgbdata, int nLeds, CRGB scale) {
    PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
    mWait.wait();
    cli();

    // attempt to re-show a frame if we exit early because of interrupts.
    if(!showRGBInternal(pixels)) {
      sei(); delayMicroseconds(WAIT_TIME); cli();
      showRGBInternal(pixels);
    }

    sei();
    mWait.mark();
  }

  virtual void show(const struct CRGB *rgbdata, int nLeds, CRGB scale) {
    PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
    mWait.wait();
    cli();

    if(!showRGBInternal(pixels)) {
      sei(); delayMicroseconds(WAIT_TIME); cli();
      showRGBInternal(pixels);
    }

    sei();
    mWait.mark();
  }

#ifdef SUPPORT_ARGB
  virtual void show(const struct CARGB *rgbdata, int nLeds, CRGB scale) {
    PixelController<RGB_ORDER> pixels(rgbdata, nLeds, scale, getDither());
    mWait.wait();
    cli();
    showRGBInternal(pixels);
    sei();
    mWait.mark();
  }
#endif

  // This method is made static to force making register Y available to use for data on AVR - if the method is non-static, then
  // gcc will use register Y for the this pointer.
  static uint32_t showRGBInternal(PixelController<RGB_ORDER> & pixels) {
    struct M0ClocklessData data;
    data.d[0] = pixels.d[0];
    data.d[1] = pixels.d[1];
    data.d[2] = pixels.d[2];
    data.s[0] = pixels.mScale[0];
    data.s[1] = pixels.mScale[1];
    data.s[2] = pixels.mScale[2];
    data.e[0] = pixels.e[0];
    data.e[1] = pixels.e[1];
    data.e[2] = pixels.e[2];
    data.adj = pixels.mAdvance;

    typename FastPin<DATA_PIN>::port_ptr_t portBase = FastPin<DATA_PIN>::port();

    // timer mode w/prescaler of 0
    LED_TIMER->MODE = TIMER_MODE_MODE_Timer;
    LED_TIMER->PRESCALER = 0;
    LED_TIMER->EVENTS_COMPARE[0] = 0;
    LED_TIMER->BITMODE = TIMER_BITMODE_BITMODE_16Bit;
    LED_TIMER->SHORTS = TIMER_SHORTS_COMPARE0_CLEAR_Msk;
    LED_TIMER->TASKS_START = 1;

    int ret = showLedData<4,8,T1,T2,T3,RGB_ORDER,WAIT_TIME>(portBase, FastPin<DATA_PIN>::mask(), pixels.mData, pixels.mLen, &data);

    LED_TIMER->TASKS_STOP = 1;
    return ret; // 0x00FFFFFF - _VAL;
  }
};


#endif // NRF51
#endif // __INC_CLOCKLESS_ARM_NRF51