/*
 * DESCRIPTION:
 * Flash component.
*/

#include "c_flash.h"

static void update_f(struct CFlash* self);

/* Updates flash component. */
static void
update_f(struct CFlash* self)
{
	vec4 color;
	f32 progress;

	if (self->isFinished)
		return;

	progress = (f32)self->timer / self->timerMax;

	glm_vec4_copy(self->color, color);

	switch (self->type)
	{
		case C_FLASH_VANISH:
			glm_vec4_scale(color, progress, color);
			break;
		case C_FLASH_APPEAR:
			glm_vec4_scale(color, (1.0f - progress), color);
			break;
		case C_FLASH_STROBE:
			glm_vec4_scale(color, sin((M_PI * 2) * (progress * 2.0f)), color);
			break;
		case C_FLASH_CONSTANT:
			glm_vec4_copy(self->color, color);
			break;
		default:
			break;
	}

	renderer_clear_color_set(&game.renderer, color);

	if (self->timer <= 0)
	{
		renderer_clear_color_set(&game.renderer, self->baseColor);
		self->timer = 0;
		self->isFinished = true;
	}
	else
		self->timer--;
}

/* Sets flash component info. */
void
c_flash_set(struct CFlash* self, vec4 baseColor, vec4 color, s32 timerMax, enum CFlashType type)
{
	self->timerMax = timerMax;
	self->type = type;
	glm_vec4_copy(baseColor, self->baseColor);
	glm_vec4_copy(color, self->color);
	self->timer = self->timerMax;
	self->isFinished = false;
}

/* Registers flash component. */
void
c_flash_register(void)
{
	ecs_register
	(
		ECS_C_FLASH,
		sizeof(struct CFlash),
		C_FLASH_LIMIT,
		NULL,
		NULL,
		(ECSFunction)update_f,
		NULL,
		NULL
	);
}