/* Copyright 2016-2017 Yang Liu
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <math.h>
#include <string.h>
#ifdef __AVR__
  #include <avr/eeprom.h>
  #include <avr/interrupt.h>
#endif
#ifdef STM32_EEPROM_ENABLE
  #include "hal.h"
  #include "eeprom.h"
  #include "eeprom_stm32.h"
#endif
#include "wait.h"
#include "progmem.h"
#include "timer.h"
#include "rgblight.h"
#include "color.h"
#include "debug.h"
#include "led_tables.h"
#include "lib/lib8tion/lib8tion.h"
#ifdef VELOCIKEY_ENABLE
  #include "velocikey.h"
#endif

#ifdef RGBLIGHT_SPLIT
  /* for split keyboard */
  #define RGBLIGHT_SPLIT_SET_CHANGE_MODE         rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_MODE
  #define RGBLIGHT_SPLIT_SET_CHANGE_HSVS         rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_HSVS
  #define RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS     rgblight_status.change_flags |= (RGBLIGHT_STATUS_CHANGE_MODE|RGBLIGHT_STATUS_CHANGE_HSVS)
  #define RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE rgblight_status.change_flags |= RGBLIGHT_STATUS_CHANGE_TIMER
  #define RGBLIGHT_SPLIT_ANIMATION_TICK          rgblight_status.change_flags |= RGBLIGHT_STATUS_ANIMATION_TICK
#else
  #define RGBLIGHT_SPLIT_SET_CHANGE_MODE
  #define RGBLIGHT_SPLIT_SET_CHANGE_HSVS
  #define RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS
  #define RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE
  #define RGBLIGHT_SPLIT_ANIMATION_TICK
#endif

#define _RGBM_SINGLE_STATIC(sym)   RGBLIGHT_MODE_ ## sym,
#define _RGBM_SINGLE_DYNAMIC(sym)
#define _RGBM_MULTI_STATIC(sym)    RGBLIGHT_MODE_ ## sym,
#define _RGBM_MULTI_DYNAMIC(sym)
#define _RGBM_TMP_STATIC(sym, msym)      RGBLIGHT_MODE_ ## sym,
#define _RGBM_TMP_DYNAMIC(sym, msym)
static uint8_t static_effect_table [] = {
#include "rgblight_modes.h"
};

#define _RGBM_SINGLE_STATIC(sym)   RGBLIGHT_MODE_ ## sym,
#define _RGBM_SINGLE_DYNAMIC(sym)  RGBLIGHT_MODE_ ## sym,
#define _RGBM_MULTI_STATIC(sym)    RGBLIGHT_MODE_ ## sym,
#define _RGBM_MULTI_DYNAMIC(sym)   RGBLIGHT_MODE_ ## sym,
#define _RGBM_TMP_STATIC(sym, msym)  RGBLIGHT_MODE_ ## msym,
#define _RGBM_TMP_DYNAMIC(sym, msym) RGBLIGHT_MODE_ ## msym,
static uint8_t mode_base_table [] = {
    0, // RGBLIGHT_MODE_zero
#include "rgblight_modes.h"
};

static inline int is_static_effect(uint8_t mode) {
    return memchr(static_effect_table, mode, sizeof(static_effect_table)) != NULL;
}

#ifdef RGBLIGHT_LED_MAP
const uint8_t led_map[] PROGMEM = RGBLIGHT_LED_MAP;
#endif

#ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
__attribute__ ((weak))
const uint8_t RGBLED_GRADIENT_RANGES[] PROGMEM = {255, 170, 127, 85, 64};
#endif

rgblight_config_t rgblight_config;
rgblight_status_t rgblight_status = { .timer_enabled = false };
bool is_rgblight_initialized = false;

#ifdef RGBLIGHT_USE_TIMER
animation_status_t animation_status = {};
#endif

#ifndef LED_ARRAY
LED_TYPE led[RGBLED_NUM];
  #define LED_ARRAY led
#endif


static uint8_t clipping_start_pos = 0;
static uint8_t clipping_num_leds = RGBLED_NUM;

void rgblight_set_clipping_range(uint8_t start_pos, uint8_t num_leds) {
  clipping_start_pos = start_pos;
  clipping_num_leds = num_leds;
}


void sethsv(uint8_t hue, uint8_t sat, uint8_t val, LED_TYPE *led1) {
  HSV hsv = { hue, sat, val > RGBLIGHT_LIMIT_VAL ? RGBLIGHT_LIMIT_VAL : val };
  RGB rgb = hsv_to_rgb(hsv);
  setrgb(rgb.r, rgb.g, rgb.b, led1);
}

void setrgb(uint8_t r, uint8_t g, uint8_t b, LED_TYPE *led1) {
  (*led1).r = r;
  (*led1).g = g;
  (*led1).b = b;
}

void rgblight_check_config(void) {
  /* Add some out of bound checks for RGB light config */

  if (rgblight_config.mode < RGBLIGHT_MODE_STATIC_LIGHT) {
    rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
  }
  else if (rgblight_config.mode > RGBLIGHT_MODES) {
    rgblight_config.mode = RGBLIGHT_MODES;
  }

  if (rgblight_config.val > RGBLIGHT_LIMIT_VAL) {
    rgblight_config.val = RGBLIGHT_LIMIT_VAL;
  }
}

uint32_t eeconfig_read_rgblight(void) {
  #if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
    return eeprom_read_dword(EECONFIG_RGBLIGHT);
  #else
    return 0;
  #endif
}

void eeconfig_update_rgblight(uint32_t val) {
  #if defined(__AVR__) || defined(STM32_EEPROM_ENABLE) || defined(PROTOCOL_ARM_ATSAM) || defined(EEPROM_SIZE)
    rgblight_check_config();
    eeprom_update_dword(EECONFIG_RGBLIGHT, val);
  #endif
}

void eeconfig_update_rgblight_default(void) {
  //dprintf("eeconfig_update_rgblight_default\n");
  rgblight_config.enable = 1;
  rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
  rgblight_config.hue = 0;
  rgblight_config.sat = UINT8_MAX;
  rgblight_config.val = RGBLIGHT_LIMIT_VAL;
  rgblight_config.speed = 0;
  RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
  eeconfig_update_rgblight(rgblight_config.raw);
}

void eeconfig_debug_rgblight(void) {
  dprintf("rgblight_config eprom\n");
  dprintf("rgblight_config.enable = %d\n", rgblight_config.enable);
  dprintf("rghlight_config.mode = %d\n", rgblight_config.mode);
  dprintf("rgblight_config.hue = %d\n", rgblight_config.hue);
  dprintf("rgblight_config.sat = %d\n", rgblight_config.sat);
  dprintf("rgblight_config.val = %d\n", rgblight_config.val);
  dprintf("rgblight_config.speed = %d\n", rgblight_config.speed);
}

void rgblight_init(void) {
  /* if already initialized, don't do it again.
     If you must do it again, extern this and set to false, first.
     This is a dirty, dirty hack until proper hooks can be added for keyboard startup. */
  if (is_rgblight_initialized) { return; }

  debug_enable = 1; // Debug ON!
  dprintf("rgblight_init called.\n");
  dprintf("rgblight_init start!\n");
  if (!eeconfig_is_enabled()) {
    dprintf("rgblight_init eeconfig is not enabled.\n");
    eeconfig_init();
    eeconfig_update_rgblight_default();
  }
  rgblight_config.raw = eeconfig_read_rgblight();
  RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
  if (!rgblight_config.mode) {
    dprintf("rgblight_init rgblight_config.mode = 0. Write default values to EEPROM.\n");
    eeconfig_update_rgblight_default();
    rgblight_config.raw = eeconfig_read_rgblight();
  }
  rgblight_check_config();

  eeconfig_debug_rgblight(); // display current eeprom values

#ifdef RGBLIGHT_USE_TIMER
    rgblight_timer_init(); // setup the timer
#endif

  if (rgblight_config.enable) {
    rgblight_mode_noeeprom(rgblight_config.mode);
  }

  is_rgblight_initialized = true;

}

uint32_t rgblight_read_dword(void) {
  return rgblight_config.raw;
}

void rgblight_update_dword(uint32_t dword) {
  RGBLIGHT_SPLIT_SET_CHANGE_MODEHSVS;
  rgblight_config.raw = dword;
  if (rgblight_config.enable)
    rgblight_mode_noeeprom(rgblight_config.mode);
  else {
#ifdef RGBLIGHT_USE_TIMER
      rgblight_timer_disable();
#endif
      rgblight_set();
  }
}

void rgblight_increase(void) {
  uint8_t mode = 0;
  if (rgblight_config.mode < RGBLIGHT_MODES) {
    mode = rgblight_config.mode + 1;
  }
  rgblight_mode(mode);
}
void rgblight_decrease(void) {
  uint8_t mode = 0;
  // Mode will never be < 1. If it ever is, eeprom needs to be initialized.
  if (rgblight_config.mode > RGBLIGHT_MODE_STATIC_LIGHT) {
    mode = rgblight_config.mode - 1;
  }
  rgblight_mode(mode);
}
void rgblight_step_helper(bool write_to_eeprom) {
  uint8_t mode = 0;
  mode = rgblight_config.mode + 1;
  if (mode > RGBLIGHT_MODES) {
    mode = 1;
  }
  rgblight_mode_eeprom_helper(mode, write_to_eeprom);
}
void rgblight_step_noeeprom(void) {
  rgblight_step_helper(false);
}
void rgblight_step(void) {
  rgblight_step_helper(true);
}
void rgblight_step_reverse_helper(bool write_to_eeprom) {
  uint8_t mode = 0;
  mode = rgblight_config.mode - 1;
  if (mode < 1) {
    mode = RGBLIGHT_MODES;
  }
  rgblight_mode_eeprom_helper(mode, write_to_eeprom);
}
void rgblight_step_reverse_noeeprom(void) {
  rgblight_step_reverse_helper(false);
}
void rgblight_step_reverse(void) {
  rgblight_step_reverse_helper(true);
}

uint8_t rgblight_get_mode(void) {
  if (!rgblight_config.enable) {
    return false;
  }

  return rgblight_config.mode;
}

void rgblight_mode_eeprom_helper(uint8_t mode, bool write_to_eeprom) {
  if (!rgblight_config.enable) {
    return;
  }
  if (mode < RGBLIGHT_MODE_STATIC_LIGHT) {
    rgblight_config.mode = RGBLIGHT_MODE_STATIC_LIGHT;
  } else if (mode > RGBLIGHT_MODES) {
    rgblight_config.mode = RGBLIGHT_MODES;
  } else {
    rgblight_config.mode = mode;
  }
  RGBLIGHT_SPLIT_SET_CHANGE_MODE;
  if (write_to_eeprom) {
    eeconfig_update_rgblight(rgblight_config.raw);
    xprintf("rgblight mode [EEPROM]: %u\n", rgblight_config.mode);
  } else {
    xprintf("rgblight mode [NOEEPROM]: %u\n", rgblight_config.mode);
  }
  if( is_static_effect(rgblight_config.mode) ) {
#ifdef RGBLIGHT_USE_TIMER
      rgblight_timer_disable();
#endif
  } else {
#ifdef RGBLIGHT_USE_TIMER
      rgblight_timer_enable();
#endif
  }
#ifdef RGBLIGHT_USE_TIMER
    animation_status.restart = true;
#endif
  rgblight_sethsv_noeeprom(rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
}

void rgblight_mode(uint8_t mode) {
  rgblight_mode_eeprom_helper(mode, true);
}

void rgblight_mode_noeeprom(uint8_t mode) {
  rgblight_mode_eeprom_helper(mode, false);
}


void rgblight_toggle(void) {
  xprintf("rgblight toggle [EEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
  if (rgblight_config.enable) {
    rgblight_disable();
  }
  else {
    rgblight_enable();
  }
}

void rgblight_toggle_noeeprom(void) {
  xprintf("rgblight toggle [NOEEPROM]: rgblight_config.enable = %u\n", !rgblight_config.enable);
  if (rgblight_config.enable) {
    rgblight_disable_noeeprom();
  }
  else {
    rgblight_enable_noeeprom();
  }
}

void rgblight_enable(void) {
  rgblight_config.enable = 1;
  // No need to update EEPROM here. rgblight_mode() will do that, actually
  //eeconfig_update_rgblight(rgblight_config.raw);
  xprintf("rgblight enable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
  rgblight_mode(rgblight_config.mode);
}

void rgblight_enable_noeeprom(void) {
  rgblight_config.enable = 1;
  xprintf("rgblight enable [NOEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
  rgblight_mode_noeeprom(rgblight_config.mode);
}

void rgblight_disable(void) {
  rgblight_config.enable = 0;
  eeconfig_update_rgblight(rgblight_config.raw);
  xprintf("rgblight disable [EEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
#ifdef RGBLIGHT_USE_TIMER
      rgblight_timer_disable();
#endif
  RGBLIGHT_SPLIT_SET_CHANGE_MODE;
  wait_ms(50);
  rgblight_set();
}

void rgblight_disable_noeeprom(void) {
  rgblight_config.enable = 0;
  xprintf("rgblight disable [noEEPROM]: rgblight_config.enable = %u\n", rgblight_config.enable);
#ifdef RGBLIGHT_USE_TIMER
    rgblight_timer_disable();
#endif
  RGBLIGHT_SPLIT_SET_CHANGE_MODE;
  wait_ms(50);
  rgblight_set();
}

void rgblight_increase_hue_helper(bool write_to_eeprom) {
  uint8_t hue = rgblight_config.hue + RGBLIGHT_HUE_STEP;
  rgblight_sethsv_eeprom_helper(hue, rgblight_config.sat, rgblight_config.val, write_to_eeprom);
}
void rgblight_increase_hue_noeeprom(void) {
  rgblight_increase_hue_helper(false);
}
void rgblight_increase_hue(void) {
  rgblight_increase_hue_helper(true);
}
void rgblight_decrease_hue_helper(bool write_to_eeprom) {
  uint8_t hue = rgblight_config.hue - RGBLIGHT_HUE_STEP;
  rgblight_sethsv_eeprom_helper(hue, rgblight_config.sat, rgblight_config.val, write_to_eeprom);
}
void rgblight_decrease_hue_noeeprom(void) {
  rgblight_decrease_hue_helper(false);
}
void rgblight_decrease_hue(void) {
  rgblight_decrease_hue_helper(true);
}
void rgblight_increase_sat_helper(bool write_to_eeprom) {
  uint8_t sat = qadd8(rgblight_config.sat, RGBLIGHT_SAT_STEP);
  rgblight_sethsv_eeprom_helper(rgblight_config.hue, sat, rgblight_config.val, write_to_eeprom);
}
void rgblight_increase_sat_noeeprom(void) {
  rgblight_increase_sat_helper(false);
}
void rgblight_increase_sat(void) {
  rgblight_increase_sat_helper(true);
}
void rgblight_decrease_sat_helper(bool write_to_eeprom) {
  uint8_t sat = qsub8(rgblight_config.sat, RGBLIGHT_SAT_STEP);
  rgblight_sethsv_eeprom_helper(rgblight_config.hue, sat, rgblight_config.val, write_to_eeprom);
}
void rgblight_decrease_sat_noeeprom(void) {
  rgblight_decrease_sat_helper(false);
}
void rgblight_decrease_sat(void) {
  rgblight_decrease_sat_helper(true);
}
void rgblight_increase_val_helper(bool write_to_eeprom) {
  uint8_t val = qadd8(rgblight_config.val, RGBLIGHT_VAL_STEP);
  rgblight_sethsv_eeprom_helper(rgblight_config.hue, rgblight_config.sat, val, write_to_eeprom);
}
void rgblight_increase_val_noeeprom(void) {
  rgblight_increase_val_helper(false);
}
void rgblight_increase_val(void) {
  rgblight_increase_val_helper(true);
}
void rgblight_decrease_val_helper(bool write_to_eeprom) {
  uint8_t val = qsub8(rgblight_config.val, RGBLIGHT_VAL_STEP);
  rgblight_sethsv_eeprom_helper(rgblight_config.hue, rgblight_config.sat, val, write_to_eeprom);
}
void rgblight_decrease_val_noeeprom(void) {
  rgblight_decrease_val_helper(false);
}
void rgblight_decrease_val(void) {
  rgblight_decrease_val_helper(true);
}
void rgblight_increase_speed(void) {
    if (rgblight_config.speed < 3)
        rgblight_config.speed++;
    //RGBLIGHT_SPLIT_SET_CHANGE_HSVS; // NEED?
    eeconfig_update_rgblight(rgblight_config.raw);//EECONFIG needs to be increased to support this
}

void rgblight_decrease_speed(void) {
    if (rgblight_config.speed > 0)
        rgblight_config.speed--;
    //RGBLIGHT_SPLIT_SET_CHANGE_HSVS; // NEED??
    eeconfig_update_rgblight(rgblight_config.raw);//EECONFIG needs to be increased to support this
}

void rgblight_sethsv_noeeprom_old(uint8_t hue, uint8_t sat, uint8_t val) {
  if (rgblight_config.enable) {
    LED_TYPE tmp_led;
    sethsv(hue, sat, val, &tmp_led);
    // dprintf("rgblight set hue [MEMORY]: %u,%u,%u\n", inmem_config.hue, inmem_config.sat, inmem_config.val);
    rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
  }
}

void rgblight_sethsv_eeprom_helper(uint8_t hue, uint8_t sat, uint8_t val, bool write_to_eeprom) {
  if (rgblight_config.enable) {
    rgblight_status.base_mode = mode_base_table[rgblight_config.mode];
    if (rgblight_config.mode == RGBLIGHT_MODE_STATIC_LIGHT) {
      // same static color
      LED_TYPE tmp_led;
      sethsv(hue, sat, val, &tmp_led);
      rgblight_setrgb(tmp_led.r, tmp_led.g, tmp_led.b);
    } else {
      // all LEDs in same color
      if ( 1 == 0 ) { //dummy
      }
#ifdef RGBLIGHT_EFFECT_BREATHING
      else if (rgblight_status.base_mode == RGBLIGHT_MODE_BREATHING ) {
        // breathing mode, ignore the change of val, use in memory value instead
        val = rgblight_config.val;
      }
#endif
#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
      else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_MOOD) {
        // rainbow mood, ignore the change of hue
        hue = rgblight_config.hue;
      }
#endif
#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
      else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_SWIRL) {
        // rainbow swirl, ignore the change of hue
        hue = rgblight_config.hue;
      }
#endif
#ifdef RGBLIGHT_EFFECT_STATIC_GRADIENT
      else if (rgblight_status.base_mode == RGBLIGHT_MODE_STATIC_GRADIENT) {
        // static gradient
        uint8_t delta = rgblight_config.mode - rgblight_status.base_mode;
        bool direction = (delta % 2) == 0;
#ifdef __AVR__
        // probably due to how pgm_read_word is defined for ARM, but the ARM compiler really hates this line
        uint8_t range = pgm_read_word(&RGBLED_GRADIENT_RANGES[delta / 2]);
#else
        uint8_t range = RGBLED_GRADIENT_RANGES[delta / 2];
#endif
        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
          uint8_t _hue = ((uint16_t)i * (uint16_t)range) / RGBLED_NUM;
          if (direction) {
            _hue = hue + _hue;
          } else {
            _hue = hue - _hue;
          }
          dprintf("rgblight rainbow set hsv: %d,%d,%d,%u\n", i, _hue, direction, range);
          sethsv(_hue, sat, val, (LED_TYPE *)&led[i]);
        }
        rgblight_set();
      }
#endif
    }
#ifdef RGBLIGHT_SPLIT
    if( rgblight_config.hue != hue ||
        rgblight_config.sat != sat ||
        rgblight_config.val != val ) {
        RGBLIGHT_SPLIT_SET_CHANGE_HSVS;
    }
#endif
    rgblight_config.hue = hue;
    rgblight_config.sat = sat;
    rgblight_config.val = val;
    if (write_to_eeprom) {
      eeconfig_update_rgblight(rgblight_config.raw);
      xprintf("rgblight set hsv [EEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
    } else {
      xprintf("rgblight set hsv [NOEEPROM]: %u,%u,%u\n", rgblight_config.hue, rgblight_config.sat, rgblight_config.val);
    }
  }
}

void rgblight_sethsv(uint8_t hue, uint8_t sat, uint8_t val) {
  rgblight_sethsv_eeprom_helper(hue, sat, val, true);
}

void rgblight_sethsv_noeeprom(uint8_t hue, uint8_t sat, uint8_t val) {
  rgblight_sethsv_eeprom_helper(hue, sat, val, false);
}

uint8_t rgblight_get_hue(void) {
  return rgblight_config.hue;
}

uint8_t rgblight_get_sat(void) {
  return rgblight_config.sat;
}

uint8_t rgblight_get_val(void) {
  return rgblight_config.val;
}

void rgblight_setrgb(uint8_t r, uint8_t g, uint8_t b) {
  if (!rgblight_config.enable) { return; }

  for (uint8_t i = 0; i < RGBLED_NUM; i++) {
    led[i].r = r;
    led[i].g = g;
    led[i].b = b;
  }
  rgblight_set();
}

void rgblight_setrgb_at(uint8_t r, uint8_t g, uint8_t b, uint8_t index) {
  if (!rgblight_config.enable || index >= RGBLED_NUM) { return; }

  led[index].r = r;
  led[index].g = g;
  led[index].b = b;
  rgblight_set();
}

void rgblight_sethsv_at(uint8_t hue, uint8_t sat, uint8_t val, uint8_t index) {
  if (!rgblight_config.enable) { return; }

  LED_TYPE tmp_led;
  sethsv(hue, sat, val, &tmp_led);
  rgblight_setrgb_at(tmp_led.r, tmp_led.g, tmp_led.b, index);
}

#if defined(RGBLIGHT_EFFECT_BREATHING) || defined(RGBLIGHT_EFFECT_RAINBOW_MOOD) || defined(RGBLIGHT_EFFECT_RAINBOW_SWIRL) \
  || defined(RGBLIGHT_EFFECT_SNAKE) || defined(RGBLIGHT_EFFECT_KNIGHT)

static uint8_t get_interval_time(const uint8_t* default_interval_address, uint8_t velocikey_min, uint8_t velocikey_max) {
  return
#ifdef VELOCIKEY_ENABLE
    velocikey_enabled() ? velocikey_match_speed(velocikey_min, velocikey_max) :
#endif
    pgm_read_byte(default_interval_address);
}

#endif

void rgblight_setrgb_range(uint8_t r, uint8_t g, uint8_t b, uint8_t start, uint8_t end) {
  if (!rgblight_config.enable || start < 0 || start >= end || end > RGBLED_NUM) { return; }

  for (uint8_t i = start; i < end; i++) {
    led[i].r = r;
    led[i].g = g;
    led[i].b = b;
  }
  rgblight_set();
  wait_ms(1);
}

void rgblight_sethsv_range(uint8_t hue, uint8_t sat, uint8_t val, uint8_t start, uint8_t end) {
  if (!rgblight_config.enable) { return; }

  LED_TYPE tmp_led;
  sethsv(hue, sat, val, &tmp_led);
  rgblight_setrgb_range(tmp_led.r, tmp_led.g, tmp_led.b, start, end);
}

void rgblight_setrgb_master(uint8_t r, uint8_t g, uint8_t b) {
  rgblight_setrgb_range(r, g, b, 0 , (uint8_t) RGBLED_NUM/2);
}

void rgblight_setrgb_slave(uint8_t r, uint8_t g, uint8_t b) {
  rgblight_setrgb_range(r, g, b, (uint8_t) RGBLED_NUM/2, (uint8_t) RGBLED_NUM);
}

void rgblight_sethsv_master(uint8_t hue, uint8_t sat, uint8_t val) {
  rgblight_sethsv_range(hue, sat, val, 0, (uint8_t) RGBLED_NUM/2);
}

void rgblight_sethsv_slave(uint8_t hue, uint8_t sat, uint8_t val) {
  rgblight_sethsv_range(hue, sat, val, (uint8_t) RGBLED_NUM/2, (uint8_t) RGBLED_NUM);
}

#ifndef RGBLIGHT_CUSTOM_DRIVER
void rgblight_set(void) {
  LED_TYPE *start_led = led + clipping_start_pos;
  uint16_t num_leds = clipping_num_leds;
  if (rgblight_config.enable) {
    #ifdef RGBLIGHT_LED_MAP
      LED_TYPE led0[RGBLED_NUM];
      for(uint8_t i = 0; i < RGBLED_NUM; i++) {
          led0[i] = led[pgm_read_byte(&led_map[i])];
      }
      start_led = led0 + clipping_start_pos;
    #endif
    #ifdef RGBW
      ws2812_setleds_rgbw(start_led, num_leds);
    #else
      ws2812_setleds(start_led, num_leds);
    #endif
  } else {
    for (uint8_t i = 0; i < RGBLED_NUM; i++) {
      led[i].r = 0;
      led[i].g = 0;
      led[i].b = 0;
    }
    #ifdef RGBW
      ws2812_setleds_rgbw(start_led, num_leds);
    #else
      ws2812_setleds(start_led, num_leds);
    #endif
  }
}
#endif

#ifdef RGBLIGHT_SPLIT
/* for split keyboard master side */
uint8_t rgblight_get_change_flags(void) {
    return rgblight_status.change_flags;
}

void rgblight_clear_change_flags(void) {
    rgblight_status.change_flags = 0;
}

void rgblight_get_syncinfo(rgblight_syncinfo_t *syncinfo) {
    syncinfo->config = rgblight_config;
    syncinfo->status = rgblight_status;
}

/* for split keyboard slave side */
void rgblight_update_sync(rgblight_syncinfo_t *syncinfo, bool write_to_eeprom) {
    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_MODE) {
        if (syncinfo->config.enable) {
            rgblight_config.enable = 1; // == rgblight_enable_noeeprom();
            rgblight_mode_eeprom_helper(syncinfo->config.mode, write_to_eeprom);
        } else {
            rgblight_disable_noeeprom();
        }
    }
    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_HSVS) {
        rgblight_sethsv_eeprom_helper(syncinfo->config.hue, syncinfo->config.sat, syncinfo->config.val, write_to_eeprom);
        // rgblight_config.speed = config->speed; // NEED???
    }
  #ifdef RGBLIGHT_USE_TIMER
    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_CHANGE_TIMER) {
        if (syncinfo->status.timer_enabled) {
            rgblight_timer_enable();
        } else {
            rgblight_timer_disable();
        }
    }
    #ifndef RGBLIGHT_SPLIT_NO_ANIMATION_SYNC
    if (syncinfo->status.change_flags & RGBLIGHT_STATUS_ANIMATION_TICK) {
        animation_status.restart = true;
    }
    #endif /* RGBLIGHT_SPLIT_NO_ANIMATION_SYNC */
  #endif /* RGBLIGHT_USE_TIMER */
}
#endif /* RGBLIGHT_SPLIT */

#ifdef RGBLIGHT_USE_TIMER

typedef void (*effect_func_t)(animation_status_t *anim);

// Animation timer -- use system timer (AVR Timer0)
void rgblight_timer_init(void) {
  // OLD!!!! Animation timer -- AVR Timer3
  // static uint8_t rgblight_timer_is_init = 0;
  // if (rgblight_timer_is_init) {
  //   return;
  // }
  // rgblight_timer_is_init = 1;
  // /* Timer 3 setup */
  // TCCR3B = _BV(WGM32) // CTC mode OCR3A as TOP
  //       | _BV(CS30); // Clock selelct: clk/1
  // /* Set TOP value */
  // uint8_t sreg = SREG;
  // cli();
  // OCR3AH = (RGBLED_TIMER_TOP >> 8) & 0xff;
  // OCR3AL = RGBLED_TIMER_TOP & 0xff;
  // SREG = sreg;

  rgblight_status.timer_enabled = false;
  RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
}
void rgblight_timer_enable(void) {
  if( !is_static_effect(rgblight_config.mode) ) {
      rgblight_status.timer_enabled = true;
  }
  animation_status.last_timer = timer_read();
  RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
  dprintf("rgblight timer enabled.\n");
}
void rgblight_timer_disable(void) {
  rgblight_status.timer_enabled = false;
  RGBLIGHT_SPLIT_SET_CHANGE_TIMER_ENABLE;
  dprintf("rgblight timer disable.\n");
}
void rgblight_timer_toggle(void) {
  dprintf("rgblight timer toggle.\n");
  if(rgblight_status.timer_enabled) {
      rgblight_timer_disable();
  } else {
      rgblight_timer_enable();
  }
}

void rgblight_show_solid_color(uint8_t r, uint8_t g, uint8_t b) {
  rgblight_enable();
  rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
  rgblight_setrgb(r, g, b);
}

static void rgblight_effect_dummy(animation_status_t *anim) {
    // do nothing
    /********
    dprintf("rgblight_task() what happened?\n");
    dprintf("is_static_effect %d\n", is_static_effect(rgblight_config.mode));
    dprintf("mode = %d, base_mode = %d, timer_enabled %d, ",
            rgblight_config.mode, rgblight_status.base_mode,
            rgblight_status.timer_enabled);
    dprintf("last_timer = %d\n",anim->last_timer);
    **/
}

void rgblight_task(void) {
  if (rgblight_status.timer_enabled) {
    effect_func_t effect_func = rgblight_effect_dummy;
    uint16_t interval_time = 2000; // dummy interval
    uint8_t delta = rgblight_config.mode - rgblight_status.base_mode;
    animation_status.delta = delta;

    // static light mode, do nothing here
    if ( 1 == 0 ) { //dummy
    }
#ifdef RGBLIGHT_EFFECT_BREATHING
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_BREATHING) {
      // breathing mode
      interval_time = get_interval_time(&RGBLED_BREATHING_INTERVALS[delta], 1, 100);
      effect_func = rgblight_effect_breathing;
    }
#endif
#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_MOOD) {
      // rainbow mood mode
      interval_time = get_interval_time(&RGBLED_RAINBOW_MOOD_INTERVALS[delta], 5, 100);
      effect_func = rgblight_effect_rainbow_mood;
    }
#endif
#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_RAINBOW_SWIRL) {
      // rainbow swirl mode
      interval_time = get_interval_time(&RGBLED_RAINBOW_SWIRL_INTERVALS[delta / 2], 1, 100);
      effect_func = rgblight_effect_rainbow_swirl;
    }
#endif
#ifdef RGBLIGHT_EFFECT_SNAKE
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_SNAKE) {
      // snake mode
      interval_time = get_interval_time(&RGBLED_SNAKE_INTERVALS[delta / 2], 1, 200);
      effect_func = rgblight_effect_snake;
    }
#endif
#ifdef RGBLIGHT_EFFECT_KNIGHT
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_KNIGHT) {
      // knight mode
      interval_time = get_interval_time(&RGBLED_KNIGHT_INTERVALS[delta], 5, 100);
      effect_func = rgblight_effect_knight;
    }
#endif
#ifdef RGBLIGHT_EFFECT_CHRISTMAS
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_CHRISTMAS) {
      // christmas mode
      interval_time = RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL;
      effect_func = (effect_func_t)rgblight_effect_christmas;
    }
#endif
#ifdef RGBLIGHT_EFFECT_RGB_TEST
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_RGB_TEST) {
      // RGB test mode
      interval_time = pgm_read_word(&RGBLED_RGBTEST_INTERVALS[0]);
      effect_func = (effect_func_t)rgblight_effect_rgbtest;
    }
#endif
#ifdef RGBLIGHT_EFFECT_ALTERNATING
    else if (rgblight_status.base_mode == RGBLIGHT_MODE_ALTERNATING){
      interval_time = 500;
      effect_func = (effect_func_t)rgblight_effect_alternating;
    }
#endif
    if (animation_status.restart) {
      animation_status.restart = false;
      animation_status.last_timer = timer_read() - interval_time - 1;
      animation_status.pos16 = 0; // restart signal to local each effect
    }
    if (timer_elapsed(animation_status.last_timer) >= interval_time) {
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
      static uint16_t report_last_timer = 0;
      static bool tick_flag = false;
      uint16_t oldpos16;
      if (tick_flag) {
        tick_flag = false;
        //dprintf("rgblight animation tick\n");
        if (timer_elapsed(report_last_timer) >= 30000) {
            report_last_timer = timer_read();
            dprintf("rgblight animation tick report to slave\n");
            RGBLIGHT_SPLIT_ANIMATION_TICK;
        }
      }
      oldpos16 = animation_status.pos16;
      //dprintf("call effect function\n");
#endif
      animation_status.last_timer += interval_time;
      effect_func(&animation_status);
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
      //dprintf("pos16, oldpos16 = %d %d\n",
      //        animation_status.pos16,oldpos16);
      if (animation_status.pos16 == 0 && oldpos16 != 0) {
          //dprintf("flag on\n");
          tick_flag = true;
      }
#endif
    }
  }
}

#endif /* RGBLIGHT_USE_TIMER */

// Effects
#ifdef RGBLIGHT_EFFECT_BREATHING

#ifndef RGBLIGHT_EFFECT_BREATHE_CENTER
  #ifndef RGBLIGHT_BREATHE_TABLE_SIZE
    #define RGBLIGHT_BREATHE_TABLE_SIZE 256 // 256 or 128 or 64
  #endif
  #include <rgblight_breathe_table.h>
#endif

__attribute__ ((weak))
const uint8_t RGBLED_BREATHING_INTERVALS[] PROGMEM = {30, 20, 10, 5};

void rgblight_effect_breathing(animation_status_t *anim) {
  float val;

  // http://sean.voisen.org/blog/2011/10/breathing-led-with-arduino/
#ifdef RGBLIGHT_EFFECT_BREATHE_TABLE
  val = pgm_read_byte(&rgblight_effect_breathe_table[anim->pos / table_scale]);
#else
  val = (exp(sin((anim->pos/255.0)*M_PI)) - RGBLIGHT_EFFECT_BREATHE_CENTER/M_E)*(RGBLIGHT_EFFECT_BREATHE_MAX/(M_E-1/M_E));
#endif
  rgblight_sethsv_noeeprom_old(rgblight_config.hue, rgblight_config.sat, val);
  anim->pos = (anim->pos + 1);
}
#endif

#ifdef RGBLIGHT_EFFECT_RAINBOW_MOOD
__attribute__ ((weak))
const uint8_t RGBLED_RAINBOW_MOOD_INTERVALS[] PROGMEM = {120, 60, 30};

void rgblight_effect_rainbow_mood(animation_status_t *anim) {
  rgblight_sethsv_noeeprom_old(anim->current_hue, rgblight_config.sat, rgblight_config.val);
  anim->current_hue++;
}
#endif

#ifdef RGBLIGHT_EFFECT_RAINBOW_SWIRL
#ifndef RGBLIGHT_RAINBOW_SWIRL_RANGE
  #define RGBLIGHT_RAINBOW_SWIRL_RANGE 255
#endif

__attribute__ ((weak))
const uint8_t RGBLED_RAINBOW_SWIRL_INTERVALS[] PROGMEM = {100, 50, 20};

void rgblight_effect_rainbow_swirl(animation_status_t *anim) {
  uint8_t hue;
  uint8_t i;

  for (i = 0; i < RGBLED_NUM; i++) {
    hue = (RGBLIGHT_RAINBOW_SWIRL_RANGE / RGBLED_NUM * i + anim->current_hue);
    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
  }
  rgblight_set();

  if (anim->delta % 2) {
    anim->current_hue++;
  } else {
    anim->current_hue--;
  }
}
#endif

#ifdef RGBLIGHT_EFFECT_SNAKE
__attribute__ ((weak))
const uint8_t RGBLED_SNAKE_INTERVALS[] PROGMEM = {100, 50, 20};

void rgblight_effect_snake(animation_status_t *anim) {
  static uint8_t pos = 0;
  uint8_t i, j;
  int8_t k;
  int8_t increment = 1;

  if (anim->delta % 2) {
    increment = -1;
  }

#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
  if (anim->pos == 0) { // restart signal
    if (increment == 1) {
      pos = RGBLED_NUM - 1;
    } else {
      pos = 0;
    }
    anim->pos = 1;
  }
#endif

  for (i = 0; i < RGBLED_NUM; i++) {
    led[i].r = 0;
    led[i].g = 0;
    led[i].b = 0;
    for (j = 0; j < RGBLIGHT_EFFECT_SNAKE_LENGTH; j++) {
      k = pos + j * increment;
      if (k < 0) {
        k = k + RGBLED_NUM;
      }
      if (i == k) {
        sethsv(rgblight_config.hue, rgblight_config.sat,
               (uint8_t)(rgblight_config.val*(RGBLIGHT_EFFECT_SNAKE_LENGTH-j)/RGBLIGHT_EFFECT_SNAKE_LENGTH),
               (LED_TYPE *)&led[i]);
      }
    }
  }
  rgblight_set();
  if (increment == 1) {
    if (pos - 1 < 0) {
      pos = RGBLED_NUM - 1;
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
      anim->pos = 0;
#endif
    } else {
      pos -= 1;
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
      anim->pos = 1;
#endif
    }
  } else {
    pos = (pos + 1) % RGBLED_NUM;
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
    anim->pos = pos;
#endif
  }
}
#endif

#ifdef RGBLIGHT_EFFECT_KNIGHT
__attribute__ ((weak))
const uint8_t RGBLED_KNIGHT_INTERVALS[] PROGMEM = {127, 63, 31};

void rgblight_effect_knight(animation_status_t *anim) {

  static int8_t low_bound = 0;
  static int8_t high_bound = RGBLIGHT_EFFECT_KNIGHT_LENGTH - 1;
  static int8_t increment = 1;
  uint8_t i, cur;

#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
  if (anim->pos == 0) { // restart signal
      anim->pos = 1;
      low_bound = 0;
      high_bound = RGBLIGHT_EFFECT_KNIGHT_LENGTH - 1;
      increment = 1;
  }
#endif
  // Set all the LEDs to 0
  for (i = 0; i < RGBLED_NUM; i++) {
    led[i].r = 0;
    led[i].g = 0;
    led[i].b = 0;
  }
  // Determine which LEDs should be lit up
  for (i = 0; i < RGBLIGHT_EFFECT_KNIGHT_LED_NUM; i++) {
    cur = (i + RGBLIGHT_EFFECT_KNIGHT_OFFSET) % RGBLED_NUM;

    if (i >= low_bound && i <= high_bound) {
      sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[cur]);
    } else {
      led[cur].r = 0;
      led[cur].g = 0;
      led[cur].b = 0;
    }
  }
  rgblight_set();

  // Move from low_bound to high_bound changing the direction we increment each
  // time a boundary is hit.
  low_bound += increment;
  high_bound += increment;

  if (high_bound <= 0 || low_bound >= RGBLIGHT_EFFECT_KNIGHT_LED_NUM - 1) {
    increment = -increment;
#if defined(RGBLIGHT_SPLIT) && !defined(RGBLIGHT_SPLIT_NO_ANIMATION_SYNC)
    if (increment == 1) {
        anim->pos = 0;
    }
#endif
  }
}
#endif

#ifdef RGBLIGHT_EFFECT_CHRISTMAS
void rgblight_effect_christmas(animation_status_t *anim) {
  uint8_t hue;
  uint8_t i;

  anim->current_offset = (anim->current_offset + 1) % 2;
  for (i = 0; i < RGBLED_NUM; i++) {
    hue = 0 + ((i/RGBLIGHT_EFFECT_CHRISTMAS_STEP + anim->current_offset) % 2) * 85;
    sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
  }
  rgblight_set();
}
#endif

#ifdef RGBLIGHT_EFFECT_RGB_TEST
__attribute__ ((weak))
const uint16_t RGBLED_RGBTEST_INTERVALS[] PROGMEM = {1024};

void rgblight_effect_rgbtest(animation_status_t *anim) {
  static uint8_t maxval = 0;
  uint8_t g; uint8_t r; uint8_t b;

  if( maxval == 0 ) {
      LED_TYPE tmp_led;
      sethsv(0, 255, RGBLIGHT_LIMIT_VAL, &tmp_led);
      maxval = tmp_led.r;
  }
  g = r = b = 0;
  switch( anim->pos ) {
    case 0: r = maxval; break;
    case 1: g = maxval; break;
    case 2: b = maxval; break;
  }
  rgblight_setrgb(r, g, b);
  anim->pos = (anim->pos + 1) % 3;
}
#endif

#ifdef RGBLIGHT_EFFECT_ALTERNATING
void rgblight_effect_alternating(animation_status_t *anim) {

  for(int i = 0; i<RGBLED_NUM; i++){
      if(i<RGBLED_NUM/2 && anim->pos){
          sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
      }else if (i>=RGBLED_NUM/2 && !anim->pos){
          sethsv(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i]);
      }else{
          sethsv(rgblight_config.hue, rgblight_config.sat, 0, (LED_TYPE *)&led[i]);
      }
  }
  rgblight_set();
  anim->pos = (anim->pos + 1) % 2;
}
#endif