<?php

namespace App\Komma\Dynamic\ComponentArea;

use App\Komma\Dynamic\Component\ComponentSaveState;

/**
 * Class DynamicGroupsSectionSaveState
 *
 * Represents data that can be saved and loaded for a component area.
 * the same as its javascript twin.
 */
class ComponentAreaSaveState implements \JsonSerializable
{
    /**
     * @var ComponentSaveState[]
     */
    private $componentSaveStates;

    public function __construct()
    {
        $this->componentSaveStates = [];
    }

    /**
     * Specify data which should be serialized to JSON
     * @link http://php.net/manual/en/jsonserializable.jsonserialize.php
     * @return mixed data which can be serialized by <b>json_encode</b>,
     *               which is a value of any type other than a resource.
     * @since 5.4.0
     */
    public function jsonSerialize()
    {
        return $this->componentSaveStates;
    }

    /**
     * @param string $json
     * @return ComponentAreaSaveState
     */
    public static function fromJsonString(string $json)
    {
        $dataArray = json_decode($json, true);
        if ($dataArray === null) {
            throw new \InvalidArgumentException('DynamicGroupsSectionSaveState:fromString The given data string could not be decoded since it was no json string: '.$json);
        }

        $instance = new self;

        $componentAreaCount = count($dataArray);
        for ($index = 0; $index < $componentAreaCount; $index++) {
            $currentDynamicGroupSaveStateArray = $dataArray[$index];
            $currentDynamicGroupSaveState = ComponentSaveState::fromArray($currentDynamicGroupSaveStateArray);
            $instance->componentSaveStates[] = $currentDynamicGroupSaveState;
        }

        return $instance;
    }

    /**
     * @param ComponentSaveState $dynamicGroupSaveState
     */
    public function addComponentSaveState(ComponentSaveState $dynamicGroupSaveState)
    {
        $this->componentSaveStates[] = $dynamicGroupSaveState;
    }

    /**
     * @param int $index
     * @return ComponentSaveState|mixed
     */
    public function getComponentSaveStateAt(int $index)
    {
        return $this->componentSaveStates[$index];
    }

    /**
     * @return int
     */
    public function getComponentsCount()
    {
        return count($this->componentSaveStates);
    }

    /**
     * @return ComponentSaveState[]|array
     */
    public function getComponentSaveStates()
    {
        return $this->componentSaveStates;
    }
}