<?php
namespace nur\sery\wip\php\access;

use nulib\cl;

class ChainKeyAccess extends AbstractAccess {
  function __construct(IAccess $access, $key) {
    parent::__construct();
    $this->access = $access;
    $this->key = $key;
  }

  protected IAccess $access;

  /** @var int|string|array */
  protected $key;

  function isAllowEmpty(): bool {
    return $this->access->isAllowEmpty();
  }

  function exists(): bool {
    $key = $this->key;
    if ($key === null) return false;
    if (!$this->access->exists()) return false;
    return cl::phas($this->access->get(), $key);
  }

  function available(): bool {
    $key = $this->key;
    if ($key === null) return false;
    if (!$this->access->available()) return false;
    $array = $this->access->get();
    if (!cl::phas($array, $key)) return false;
    return $this->isAllowEmpty() || cl::pget($array, $key) !== "";
  }

  function get($default=null) {
    return cl::pget($this->access->get($default), $this->key);
  }

  function set($value): void {
    $array = $this->access->get();
    cl::pset($array, $this->key, $value);
    $this->access->set($array);
  }

  function del(): void {
    $array = $this->access->get();
    cl::pdel($array, $this->key);
    $this->access->set($array);
  }

  function addKey($key): IAccess {
    return new ChainKeyAccess($this->access, cl::merge($this->key, $key));
  }
}