#include "drashna.h"
#include "rgb_stuff.h"

extern rgblight_config_t rgblight_config;
extern userspace_config_t userspace_config;

#ifdef RGBLIGHT_ENABLE
void rgblight_sethsv_default_helper(uint8_t index) {
  rgblight_sethsv_at(rgblight_config.hue, rgblight_config.sat, rgblight_config.val, index);
}
#endif // RGBLIGHT_ENABLE

#ifdef INDICATOR_LIGHTS
uint8_t last_mod;
uint8_t last_led;
uint8_t last_osm;
uint8_t current_mod;
uint8_t current_led;
uint8_t current_osm;


void set_rgb_indicators(uint8_t this_mod, uint8_t this_led, uint8_t this_osm) {
  if (userspace_config.rgb_layer_change && biton32(layer_state) == 0) {
    if (this_mod & MODS_SHIFT_MASK || this_led & (1<<USB_LED_CAPS_LOCK) || this_osm & MODS_SHIFT_MASK) {
      rgblight_sethsv_at(0, 255, 255, SHFT_LED1);
      rgblight_sethsv_at(0, 255, 255, SHFT_LED2);
    } else {
      rgblight_sethsv_default_helper(SHFT_LED1);
      rgblight_sethsv_default_helper(SHFT_LED2);
    }
    if (this_mod & MODS_CTRL_MASK || this_osm & MODS_CTRL_MASK) {
      rgblight_sethsv_at(51, 255, 255, CTRL_LED1);
      rgblight_sethsv_at(51, 255, 255, CTRL_LED2);
    } else {
      rgblight_sethsv_default_helper(CTRL_LED1);
      rgblight_sethsv_default_helper(CTRL_LED2);
    }
    if (this_mod & MODS_GUI_MASK || this_osm & MODS_GUI_MASK) {
      rgblight_sethsv_at(120, 255, 255, GUI_LED1);
      rgblight_sethsv_at(120, 255, 255, GUI_LED2);
    } else {
      rgblight_sethsv_default_helper(GUI_LED1);
      rgblight_sethsv_default_helper(GUI_LED2);
    }
  }
}

void matrix_scan_indicator(void) {
  current_mod = get_mods();
  current_led = host_keyboard_leds();
  current_osm = get_oneshot_mods();

  set_rgb_indicators(current_mod, current_led, current_osm);

  last_mod = current_mod;
  last_led = current_led;
  last_osm = current_osm;

}
#endif //INDICATOR_LIGHTS

#ifdef RGBLIGHT_TWINKLE
static rgblight_fadeout lights[RGBLED_NUM];

__attribute__ ((weak))
bool indicator_is_this_led_used(uint8_t index) { return false; }

void scan_rgblight_fadeout(void) { // Don't effing change this function .... rgblight_sethsv is supppppper intensive
  bool litup = false;
  for (uint8_t light_index = 0 ; light_index < RGBLED_NUM ; ++light_index ) {
    if (lights[light_index].enabled && timer_elapsed(lights[light_index].timer) > 10) {
      rgblight_fadeout *light = &lights[light_index];
      litup = true;

      if (light->life) {
        light->life -= 1;
        if (biton32(layer_state) == 0) {
          sethsv(light->hue + rand() % 0xF, 255, light->life, (LED_TYPE *)&led[light_index]);
        }
        light->timer = timer_read();
      }
      else {
        if (light->enabled && biton32(layer_state) == 0) { rgblight_sethsv_default_helper(light_index); }
        litup = light->enabled = false;
      }
    }
  }
  if (litup && biton32(layer_state) == 0) {
    rgblight_set();
  }
}

void start_rgb_light(void) {

    uint8_t indices[RGBLED_NUM];
    uint8_t indices_count = 0;
    uint8_t min_life = 0xFF;
    uint8_t min_life_index = -1;
    for (uint8_t index = 0 ; index < RGBLED_NUM ; ++index ) {
      if (indicator_is_this_led_used(index)) { continue; }
      if (lights[index].enabled) {
        if (min_life_index == -1 ||
          lights[index].life < min_life)
        {
          min_life = lights[index].life;
          min_life_index = index;
        }
        continue;
      }

      indices[indices_count] = index;
      ++indices_count;
    }

    uint8_t light_index;
    if (!indices_count) {
        light_index = min_life_index;
    }
    else {
      light_index = indices[rand() % indices_count];
    }

    rgblight_fadeout *light = &lights[light_index];
    light->enabled = true;
    light->timer = timer_read();
    light->life = 0xC0 + rand() % 0x40;

    light->hue = rgblight_config.hue + (rand() % 0xB4) - 0x54;

    rgblight_sethsv_at(light->hue, 255, light->life, light_index);
}
#endif


bool process_record_user_rgb(uint16_t keycode, keyrecord_t *record) {
    switch (keycode) {
#ifdef RGBLIGHT_TWINKLE
    case KC_A ... KC_SLASH:
    case KC_F1 ... KC_F12:
    case KC_INSERT ... KC_UP:
    case KC_KP_SLASH ... KC_KP_DOT:
    case KC_F13 ... KC_F24:
    case KC_AUDIO_MUTE ... KC_MEDIA_REWIND:
      if (record->event.pressed) { start_rgb_light(); }
      return true; break;
#endif // RGBLIGHT_TWINKLE
  case KC_RGB_T:  // This allows me to use underglow as layer indication, or as normal
#ifdef RGBLIGHT_ENABLE
    if (record->event.pressed) {
      userspace_config.rgb_layer_change ^= 1;
      xprintf("rgblight layer change [EEPROM]: %u\n", userspace_config.rgb_layer_change);
      eeprom_update_byte(EECONFIG_USERSPACE, userspace_config.raw);
      if (userspace_config.rgb_layer_change) {
        layer_state_set(layer_state); // This is needed to immediately set the layer color (looks better)
      }
    }
#endif // RGBLIGHT_ENABLE
    return false; break;
#ifdef RGBLIGHT_ENABLE
  case RGB_MODE_FORWARD ... RGB_MODE_GRADIENT: // quantum_keycodes.h L400 for definitions
    if (record->event.pressed) { //This disables layer indication, as it's assumed that if you're changing this ... you want that disabled
      if (userspace_config.rgb_layer_change) {
        userspace_config.rgb_layer_change = false;
        xprintf("rgblight layer change [EEPROM]: %u\n", userspace_config.rgb_layer_change);
        eeprom_update_byte(EECONFIG_USERSPACE, userspace_config.raw);
      }
    }
    return true; break;
#endif // RGBLIGHT_ENABLE
  }
    return true;
}



void matrix_init_rgb(void) {
#ifdef INDICATOR_LIGHTS
  current_mod = last_mod = get_mods();
  current_led = last_led = host_keyboard_leds();
  current_osm = last_osm = get_oneshot_mods();
#endif

  if (userspace_config.rgb_layer_change) {
    uint8_t default_layer = eeconfig_read_default_layer();
    rgblight_enable_noeeprom();
    if (default_layer & (1UL << _COLEMAK)) {
      rgblight_sethsv_magenta();
    } else if (default_layer & (1UL << _DVORAK)) {
      rgblight_sethsv_green();
    } else if (default_layer & (1UL << _WORKMAN)) {
      rgblight_sethsv_goldenrod();
    } else {
      rgblight_sethsv_cyan();
    }
  }
}

void matrix_scan_rgb(void) {
#ifdef RGBLIGHT_TWINKLE
  scan_rgblight_fadeout();
#endif // RGBLIGHT_ENABLE

#ifdef INDICATOR_LIGHTS
  matrix_scan_indicator();
#endif

}


uint32_t layer_state_set_rgb(uint32_t state) {
#ifdef RGBLIGHT_ENABLE
  uint8_t default_layer = eeconfig_read_default_layer();
  if (userspace_config.rgb_layer_change) {
    switch (biton32(state)) {
    case _MACROS:
      rgblight_sethsv_noeeprom_orange();
      userspace_config.is_overwatch ? rgblight_mode_noeeprom(17) : rgblight_mode_noeeprom(18);
      break;
    case _MEDIA:
      rgblight_sethsv_noeeprom_chartreuse();
      rgblight_mode_noeeprom(22);
      break;
    case _GAMEPAD:
      rgblight_sethsv_noeeprom_orange();
      rgblight_mode_noeeprom(17);
      break;
    case _DIABLO:
      rgblight_sethsv_noeeprom_red();
      rgblight_mode_noeeprom(5);
      break;
    case _RAISE:
      rgblight_sethsv_noeeprom_yellow();
      rgblight_mode_noeeprom(5);
      break;
    case _LOWER:
      rgblight_sethsv_noeeprom_orange();
      rgblight_mode_noeeprom(5);
      break;
    case _ADJUST:
      rgblight_sethsv_noeeprom_red();
      rgblight_mode_noeeprom(23);
      break;
    default: //  for any other layers, or the default layer
      if (default_layer & (1UL << _COLEMAK)) {
        rgblight_sethsv_noeeprom_magenta();
      } else if (default_layer & (1UL << _DVORAK)) {
        rgblight_sethsv_noeeprom_green();
      } else if (default_layer & (1UL << _WORKMAN)) {
        rgblight_sethsv_noeeprom_goldenrod();
      } else {
        rgblight_sethsv_noeeprom_cyan();
      }
      biton32(state) == _MODS ? rgblight_mode_noeeprom(2) : rgblight_mode_noeeprom(1); // if _MODS layer is on, then breath to denote it
      break;
    }
//    layer_state_set_indicator(); // Runs every scan, so need to call this here .... since I can't get it working "right" anyhow
  }
#endif // RGBLIGHT_ENABLE

  return state;
}