<?php

namespace Drupal\dds_dynamic_key_value;

use Drupal\Core\KeyValueStore\KeyValueFactory;

/**
 * Class DynamicKeyValueStorage.
 *
 * @package Drupal\dds_maps
 */
class DynamicKeyValueStorage {

  /**
   * Variable holding the key-value factory.
   *
   * @var \Drupal\Core\KeyValueStore\KeyValueFactory
   */
  private $keyValue;

  /**
   * YamlConfigStorage constructor.
   *
   * @param \Drupal\Core\KeyValueStore\KeyValueFactory $keyValueFactory
   *   The key value factory.
   */
  public function __construct(KeyValueFactory $keyValueFactory) {
    $this->keyValue = $keyValueFactory;
  }

  /**
   * Save the configuration into the key-value store.
   *
   * @param array $values
   *   The values to save.
   */
  public function save(array $values): void {
    foreach ($values as $key => $value) {
      $this->keyValue->get('dynamic_key_value')->set($key, $value);
    }
  }

  /**
   * The the complete configuration for key.
   *
   * @param string $key
   *   The key to get the config for.
   *
   * @return array
   *   The complete configuration for the provided key.
   */
  public function getCollection(string $key): array {
    $collection =  $this->keyValue->get('dynamic_key_value')->get($key);
    return $collection ?? [];
  }

  /**
   * Get a specific configuration.
   *
   * @param string $key
   *   The key to get the config from.
   * @param string $name
   *   The name of the config to retrieve.
   *
   * @return mixed|null
   *   The value of the config.
   */
  public function get(string $key, string $name) {
    $configs = $this->getCollection($key);
    return $configs[$name] ?? NULL;
  }

  /**
   * Get the names of the collections.
   *
   * @return array
   *   Array containing the names of all the collections.
   */
  public function getCollectionLabels(): array {
    $collections = $this->keyValue->get('dynamic_key_value')->getAll();

    if (!empty($collections)) {
      $keys = array_keys($collections);
      return array_combine($keys, $keys);
    }

    return [];
  }

  /**
   * Retrieve config as key-value for use in ex. select field.
   *
   * @param $key
   *   The key of the collection to retrieve.
   *
   * @param string $property
   *   Name of property to use as option
   *
   * @return array
   *  Array containing the options names
   */
  public function getOptions($key, $property = 'name'): array {

    if (is_string($key)) {
      $collection = $this->getCollection($key);

      $config = [];
      if (!empty($collection)) {
        foreach ($collection as $collection_key => $value) {
          $config[$collection_key] = $value[$property];
        }
      }

      return $config;
    }

    return [];
  }

  /**
   * Get config that needs to bee exposed through drupalSettings.
   *
   * @param $key
   *   The key of the collection to retrieve.
   *
   * @return array
   *   Array containing the settings that needs to be exposed to js.
   */
  public function getJSOptions($key) : array {

    if (is_string($key)) {
      $collection = $this->getCollection($key);

      $config = [];
      if (!empty($collection)) {
        foreach ($collection as $collection_key => $value) {
          if(isset($value['js']) && $value['js'] === TRUE) {
            unset($value['js']);
            $config[$collection_key] = $value;
          }
        }
      }

      return $config;
    }

    return [];
  }

}