<?php

namespace App\Support;

use Illuminate\Support\Collection;

class Set implements \Countable
{
    /**
     *
     */
    protected $items = [];

    public function __construct($items = [])
    {
        foreach($items as $k => $v) {
            $this->set($k, $v);
        }
    }

    public function set($key, bool $value = true) : self
    {
        if ($value) {
            $this->items[$key] = true;
        } else {
            unset($this->items[$key]);
        }

        return $this;
    }

    public function fill($array) : self
    {
        $this->clear();

        foreach($array as $k => $v) {
            $this->set($k, $v);
        }

        return $this;
    }

    public function has($key) : bool
    {
        return isset($this->items[$key]);
    }

    public function toggle($key) : self
    {
        $this->set($key, !$this->has($key));
        return $this;
    }

    public function clear() : self
    {
        $this->items = [];
        return $this;
    }

    public function all() : Collection
    {
        return collect($this->items)->keys();
    }

    public function count() : int
    {
        return count($this->items);
    }

    public function toArray()
    {
        return $this->items;
    }
}