<?php

namespace App\Game;

/** One creature / object in a room (the fields of the original room record, named). */
final class Entity
{
    public int $kind = Values::K_NONE;
    public int $y = 0;
    public int $x = 0;
    public int $frame = 0;
    public int $timer = 0;
    public int $rows = 24;
    public int $flags = 0;
    public int $a7 = 0;
    public int $a8 = 0;
    public int $next = 0;
    public bool $drawn = false;

    public static function none(): self
    {
        return new self();
    }

    public function used(): bool
    {
        return $this->kind !== Values::K_NONE;
    }

    public function copyFrom(self $o): void
    {
        $this->kind = $o->kind;
        $this->y = $o->y;
        $this->x = $o->x;
        $this->frame = $o->frame;
        $this->timer = $o->timer;
        $this->rows = $o->rows;
        $this->flags = $o->flags;
        $this->a7 = $o->a7;
        $this->a8 = $o->a8;
        $this->next = $o->next;
        $this->drawn = $o->drawn;
    }

    public function clear(): void
    {
        $this->kind = Values::K_NONE;
        $this->y = 0;
        $this->x = 0;
        $this->frame = 0;
        $this->timer = 0;
        $this->rows = 24;
        $this->flags = 0;
        $this->a7 = 0;
        $this->a8 = 0;
        $this->next = 0;
        $this->drawn = false;
    }
}