<?php

namespace Application\Content;

use Application\AppEnvironment;
use Application\Models\Article;
use Application\Models\Site;
use Exception;
use GuzzleHttp\Client;
use GuzzleHttp\Exception\GuzzleException;
use JMS\Serializer\SerializerBuilder;

class CockpitApi
{
  private ?Client $client = null;

  public function __construct()
  {
    $this->client = new Client();
  }

  /**
   * @param string $type
   * @param array  $variables
   *
   * @return string
   * @throws Exception
   */
  private function getApiPath(string $type = 'item', array $variables = []): string
  {
    $path = match ($type) {
      'itemByModel'      => '/content/item/{model}',
      'itemsByModel'     => '/content/items/{model}',
      'itemByModelAndId' => '/content/item/{model}/{id}',
      'items'            => '/content/items',
      'aggregateByModel' => '/content/aggregate/{model}',
      'treeByModel'      => '/content/tree/{model}',
      'healthcheck'      => '/system/healthcheck',
      default            => throw new Exception("Type '$type' does not exist."),
    };

    foreach ($variables as $search => $replace) {
      $path = str_replace('{' . $search . '}', $replace, $path);
    }

    if (str_contains($path, '{')) {
      throw new Exception("Non replaced variable in path '$path'.");
    }

    return AppEnvironment::getInstance()->getVariable('COCKPIT_API_PATH') . $path;
  }

  /**
   * @throws GuzzleException
   * @throws Exception
   */
  public function getGlobalData(): Site
  {
    $res = $this->client->request('GET', $this->getApiPath('itemByModel', ['model' => 'site']), [
      'headers' => [
        'api-key' => AppEnvironment::getInstance()->getVariable('COCKPIT_API_KEY'),
      ],
    ]);

    return $this->deserialize($res->getBody()->getContents(), Site::class);
  }

  /**
   * @throws GuzzleException
   * @throws Exception
   * @return Article[]
   */
  public function getArticles(): array
  {
    $res = $this->client->request('GET', $this->getApiPath('itemsByModel', ['model' => 'article']), [
      'headers' => [
        'api-key' => AppEnvironment::getInstance()->getVariable('COCKPIT_API_KEY'),
      ],
      'query'   => [
        'filter'   => null, # '{fieldA:"test"}'
        'fields'   => null,
        'sort'     => null,
        'limit'    => 10,
        'skip'     => 0,
        'populate' => 1,
      ],
    ]);

    return $this->deserialize($res->getBody()->getContents(), Article::class);
  }

  /**
   * @throws GuzzleException
   * @throws Exception
   */
  public function getArticle(string $id): Article
  {
    $res = $this->client->request('GET', $this->getApiPath('itemByModelAndId', ['model' => 'article', 'id' => $id]), [
      'headers' => [
        'api-key' => AppEnvironment::getInstance()->getVariable('COCKPIT_API_KEY'),
      ],
      'query'   => [
        'filter'   => null, # "{_id:$id}",
        'fields'   => null,
        'sort'     => null,
        'limit'    => 1,
        'skip'     => 0,
        'populate' => 1,
      ],
    ]);

    return $this->deserialize($res->getBody()->getContents(), Article::class);
  }

  /**
   * Deserialize JSON data into objects.
   *
   * @param string $json
   * @param string $type
   *
   * @return mixed
   */
  private function deserialize(string $json, string $type): mixed
  {
    $array = json_decode($json, true);

    if (!isset($array['data'])) {
      return SerializerBuilder::create()->build()->deserialize($json, $type, 'json');
    }

    $return = [];
    foreach ($array['data'] as $data) {
      $json = json_encode($data);
      $return[] = SerializerBuilder::create()->build()->deserialize($json, $type, 'json');
    }

    return $return;
  }
}