<?php
/**
 * This file is part of the Cloudinary PHP package.
 *
 * (c) Cloudinary
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Cloudinary\Api\Metadata;

use InvalidArgumentException;

/**
 * Represents a structured metadata list field.
 *
 * @api
 */
abstract class MetadataFieldList extends MetadataField
{
    /**
     * @var MetadataDataSource $datasource
     */
    protected $datasource;

    /**
     * The MetadataFieldList constructor.
     *
     * @param string                   $label
     * @param array|MetadataDataSource $dataSource
     */
    public function __construct($label, $dataSource = [])
    {
        parent::__construct($label);
        $this->type = MetadataFieldType::STRING;
        $this->setDataSource($dataSource);
    }

    /**
     * Gets the keys for all the properties of this object.
     *
     * @return string[]
     */
    public function getPropertyKeys()
    {
        return array_merge(parent::getPropertyKeys(), ['datasource']);
    }

    /**
     * Gets the data source of this field.
     *
     * @return MetadataDataSource The data source.
     */
    public function getDataSource()
    {
        return $this->datasource;
    }

    /**
     * Sets the data source for this field.
     *
     * @param array|MetadataDataSource $metadataDataSource The data source to set.
     *
     * @throws InvalidArgumentException
     */
    public function setDataSource($metadataDataSource)
    {
        if ($metadataDataSource instanceof MetadataDataSource) {
            $this->datasource = $metadataDataSource;
        } elseif (is_array($metadataDataSource)) {
            $this->datasource = new MetadataDataSource($metadataDataSource);
        } else {
            throw new InvalidArgumentException('The specified MetadataFieldList datasource is not valid.');
        }
    }
}