<?php
namespace Vichan\Services\Embed;

use RuntimeException;
use Vichan\Context;
use Vichan\Data\Driver\LogDriver;

class EmbedService {
	private array $tuples;
	private LogDriver $log;

	public function __construct(LogDriver $log) {
		$this->log = $log;
	}

	/**
	 * Undocumented function
	 *
	 * @param Context $ctx
	 * @param string $rawText
	 * @return void
	 */
	public function matchEmbed(Context $ctx, string $rawText) {
		if (\filter_var($rawText, \FILTER_VALIDATE_URL) === false) {
			return null;
		}
		$rawText = \trim($rawText);

		foreach ($this->tuples as $cfg) {
			if (!isset($cfg['match_regex'])) {
				throw new \RuntimeException('Missing \'match_regex\' field');
			}
			$match_regex = $cfg['match_regex'];

			if (\preg_match($match_regex, $rawText, $matches)) {
				if (!isset($cfg['type'])) {
					throw new \RuntimeException('Missing \'type\' field');
				}
				$type = $cfg['type'];

				if ($type === 'oembed') {
					if (!isset($cfg['provider'])) {
						throw new \RuntimeException('Missing \'provider\' field');
					}
					$provider = $cfg['provider'];

					$extractor = $ctx->get(OembedExtractor::class);
					$oembed_resp = $extractor->fetch($provider, $rawText);


				} elseif ($type === 'regex') {
					if (!isset($cfg['thumbnail_url'])) {
						throw new \RuntimeException('Missing \'thumbnail_url\' field');
					}
					$thumbnail_url_regex = $cfg['thumbnail_url'];
					// Plz somebody review this.
					$thumbnail_url = \preg_replace($match_regex, $thumbnail_url_regex, $rawText);
				} else {
					$this->log->log(LogDriver::ERROR, "Unknown embed type '$type', ignoring");
				}
			}
		}
	}
}