/**
  * @file lv_led.c
  *
  */
 
 /*********************
  *      INCLUDES
  *********************/
 #include "lv_led.h"
 #if LV_USE_LED
 
 #include "../../../misc/lv_assert.h"
 
 /*********************
  *      DEFINES
  *********************/
 #define MY_CLASS &lv_led_class
 
 /**********************
  *      TYPEDEFS
  **********************/
 
 /**********************
  *  STATIC PROTOTYPES
  **********************/
 static void lv_led_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
 static void lv_led_event(const lv_obj_class_t * class_p, lv_event_t * e);
 
 /**********************
  *  STATIC VARIABLES
  **********************/
 const lv_obj_class_t lv_led_class  = {
     .base_class = &lv_obj_class,
     .constructor_cb = lv_led_constructor,
     .width_def = LV_DPI_DEF / 5,
     .height_def = LV_DPI_DEF / 5,
     .event_cb = lv_led_event,
     .instance_size = sizeof(lv_led_t),
 };
 
 /**********************
  *      MACROS
  **********************/
 
 /**********************
  *   GLOBAL FUNCTIONS
  **********************/
 
 /**
  * Create a led object
  * @param parent pointer to an object, it will be the parent of the new led
  * @return pointer to the created led
  */
 lv_obj_t * lv_led_create(lv_obj_t * parent)
 {
     LV_LOG_INFO("begin");
     lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
     lv_obj_class_init_obj(obj);
     return obj;
 }
 
 /*=====================
  * Setter functions
  *====================*/
 
 /**
  * Set the color of the LED
  * @param led       pointer to a LED object
  * @param color     the color of the LED
  */
 void lv_led_set_color(lv_obj_t * obj, lv_color_t color)
 {
     LV_ASSERT_OBJ(obj, MY_CLASS);
 
     lv_led_t * led = (lv_led_t *)obj;
     led->color = color;
     lv_obj_invalidate(obj);
 }
 
 /**
  * Set the brightness of a LED object
  * @param led pointer to a LED object
  * @param bright LV_LED_BRIGHT_MIN (max. dark) ... LV_LED_BRIGHT_MAX (max. light)
  */
 void lv_led_set_brightness(lv_obj_t * obj, uint8_t bright)
 {
     LV_ASSERT_OBJ(obj, MY_CLASS);
 
     lv_led_t * led = (lv_led_t *)obj;
     if(led->bright == bright) return;
 
     led->bright = LV_CLAMP(LV_LED_BRIGHT_MIN, bright, LV_LED_BRIGHT_MAX);
 
     /*Invalidate the object there fore it will be redrawn*/
     lv_obj_invalidate(obj);
 }
 
 /**
  * Light on a LED
  * @param led pointer to a LED object
  */
 void lv_led_on(lv_obj_t * led)
 {
     lv_led_set_brightness(led, LV_LED_BRIGHT_MAX);
 }
 
 /**
  * Light off a LED
  * @param led pointer to a LED object
  */
 void lv_led_off(lv_obj_t * led)
 {
     lv_led_set_brightness(led, LV_LED_BRIGHT_MIN);
 }
 
 /**
  * Toggle the state of a LED
  * @param led pointer to a LED object
  */
 void lv_led_toggle(lv_obj_t * obj)
 {
     uint8_t bright = lv_led_get_brightness(obj);
     if(bright > (LV_LED_BRIGHT_MIN + LV_LED_BRIGHT_MAX) >> 1)
         lv_led_off(obj);
     else
         lv_led_on(obj);
 }
 
 /*=====================
  * Getter functions
  *====================*/
 
 /**
  * Get the brightness of a LEd object
  * @param led pointer to LED object
  * @return bright 0 (max. dark) ... 255 (max. light)
  */
 uint8_t lv_led_get_brightness(const lv_obj_t * obj)
 {
     LV_ASSERT_OBJ(obj, MY_CLASS);
 
     lv_led_t * led = (lv_led_t *)obj;
     return led->bright;
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
 static void lv_led_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
 {
     LV_UNUSED(class_p);
     lv_led_t * led = (lv_led_t *)obj;
     led->color = lv_theme_get_color_primary(obj);
     led->bright = LV_LED_BRIGHT_MAX;
 }
 
 static void lv_led_event(const lv_obj_class_t * class_p, lv_event_t * e)
 {
     LV_UNUSED(class_p);
 
     lv_res_t res;
 
     /* Call the ancestor's event handler */
     lv_event_code_t code = lv_event_get_code(e);
     if(code != LV_EVENT_DRAW_MAIN && code != LV_EVENT_DRAW_MAIN_END) {
         res = lv_obj_event_base(MY_CLASS, e);
         if(res != LV_RES_OK) return;
     }
 
     lv_obj_t * obj = lv_event_get_target(e);
     if(code == LV_EVENT_DRAW_MAIN) {
         /*Make darker colors in a temporary style according to the brightness*/
         lv_led_t * led = (lv_led_t *)obj;
 
         lv_draw_rect_dsc_t rect_dsc;
         lv_draw_rect_dsc_init(&rect_dsc);
         lv_obj_init_draw_rect_dsc(obj, LV_PART_MAIN, &rect_dsc);
 
         /*Use the original colors brightness to modify color->led*/
         rect_dsc.bg_grad.stops[0].color = lv_color_mix(led->color, lv_color_black(),
                                                        lv_color_brightness(rect_dsc.bg_grad.stops[0].color));
         rect_dsc.bg_grad.stops[1].color = lv_color_mix(led->color, lv_color_black(),
                                                        lv_color_brightness(rect_dsc.bg_grad.stops[1].color));
         rect_dsc.shadow_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.shadow_color));
         rect_dsc.border_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.border_color));
         rect_dsc.outline_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.outline_color));
 
         /*Mix. the color with black proportionally with brightness*/
         rect_dsc.bg_grad.stops[0].color   = lv_color_mix(rect_dsc.bg_grad.stops[0].color, lv_color_black(), led->bright);
         rect_dsc.bg_grad.stops[1].color   = lv_color_mix(rect_dsc.bg_grad.stops[1].color, lv_color_black(), led->bright);
         rect_dsc.border_color = lv_color_mix(rect_dsc.border_color, lv_color_black(), led->bright);
         rect_dsc.shadow_color = lv_color_mix(rect_dsc.shadow_color, lv_color_black(), led->bright);
         rect_dsc.outline_color = lv_color_mix(rect_dsc.outline_color, lv_color_black(), led->bright);
 
         /*Set the current shadow width according to brightness proportionally between LV_LED_BRIGHT_OFF
          * and LV_LED_BRIGHT_ON*/
         rect_dsc.shadow_width = ((led->bright - LV_LED_BRIGHT_MIN) * rect_dsc.shadow_width) /
                                 (LV_LED_BRIGHT_MAX - LV_LED_BRIGHT_MIN);
         rect_dsc.shadow_spread = ((led->bright - LV_LED_BRIGHT_MIN) * rect_dsc.shadow_spread) /
                                  (LV_LED_BRIGHT_MAX - LV_LED_BRIGHT_MIN);
 
         lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
 
         lv_obj_draw_part_dsc_t  part_draw_dsc;
         lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
         part_draw_dsc.draw_area = &obj->coords;
         part_draw_dsc.class_p = MY_CLASS;
         part_draw_dsc.type = LV_LED_DRAW_PART_RECTANGLE;
         part_draw_dsc.rect_dsc = &rect_dsc;
         part_draw_dsc.part = LV_PART_MAIN;
 
         lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
         lv_draw_rect(draw_ctx, &rect_dsc, &obj->coords);
         lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
     }
 }
 
 #endif

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