<?php

/**
 * @package     MokoSuiteCross
 * @subpackage  com_mokosuitecross
 * @author      Moko Consulting <hello@mokoconsulting.tech>
 * @copyright   Copyright (C) 2026 Moko Consulting. All rights reserved.
 * @license     GNU General Public License version 3 or later; see LICENSE
 * SPDX-License-Identifier: GPL-3.0-or-later
 */

namespace Joomla\Component\MokoSuiteCross\Administrator\Helper;

defined('_JEXEC') or die;

use Joomla\CMS\Component\ComponentHelper;

/**
 * Shortens URLs via Bitly, Rebrandly, or YOURLS.
 *
 * Returns the original URL on any failure so cross-posts are never broken.
 */
class LinkShortenerHelper
{
	/**
	 * Shorten a URL using the configured provider.
	 *
	 * @param   string  $url  The URL to shorten
	 *
	 * @return  string  Shortened URL, or the original on failure/disabled
	 */
	public static function shorten(string $url): string
	{
		$params   = ComponentHelper::getParams('com_mokosuitecross');
		$provider = $params->get('link_shortener', 'none');

		if ($provider === 'none' || empty($url)) {
			return $url;
		}

		$apiKey = $params->get('link_shortener_api_key', '');

		switch ($provider) {
			case 'bitly':
				return self::shortenWithBitly($url, $apiKey);

			case 'rebrandly':
				return self::shortenWithRebrandly($url, $apiKey);

			case 'yourls':
				$apiUrl = $params->get('link_shortener_yourls_url', '');
				$token  = $params->get('link_shortener_yourls_token', '');
				return self::shortenWithYourls($url, $apiUrl, $token);

			default:
				return $url;
		}
	}

	/**
	 * Shorten via Bitly API v4.
	 */
	public static function shortenWithBitly(string $url, string $apiKey): string
	{
		if (empty($apiKey)) {
			return $url;
		}

		$ch = curl_init();
		curl_setopt_array($ch, [
			CURLOPT_URL            => 'https://api-ssl.bitly.com/v4/shorten',
			CURLOPT_POST           => true,
			CURLOPT_POSTFIELDS     => json_encode(['long_url' => $url]),
			CURLOPT_HTTPHEADER     => [
				'Authorization: Bearer ' . $apiKey,
				'Content-Type: application/json',
			],
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_TIMEOUT        => 10,
		]);

		$response = curl_exec($ch);
		$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		curl_close($ch);

		if ($response === false || $httpCode < 200 || $httpCode >= 300) {
			return $url;
		}

		$data = json_decode($response, true);

		return $data['link'] ?? $url;
	}

	/**
	 * Shorten via Rebrandly API.
	 */
	public static function shortenWithRebrandly(string $url, string $apiKey, string $workspace = ''): string
	{
		if (empty($apiKey)) {
			return $url;
		}

		$headers = [
			'apikey: ' . $apiKey,
			'Content-Type: application/json',
		];

		if (!empty($workspace)) {
			$headers[] = 'workspace: ' . $workspace;
		}

		$ch = curl_init();
		curl_setopt_array($ch, [
			CURLOPT_URL            => 'https://api.rebrandly.com/v1/links',
			CURLOPT_POST           => true,
			CURLOPT_POSTFIELDS     => json_encode(['destination' => $url]),
			CURLOPT_HTTPHEADER     => $headers,
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_TIMEOUT        => 10,
		]);

		$response = curl_exec($ch);
		$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		curl_close($ch);

		if ($response === false || $httpCode < 200 || $httpCode >= 300) {
			return $url;
		}

		$data = json_decode($response, true);
		$short = $data['shortUrl'] ?? '';

		return !empty($short) ? 'https://' . ltrim($short, 'https://') : $url;
	}

	/**
	 * Shorten via YOURLS API (self-hosted).
	 */
	public static function shortenWithYourls(string $url, string $apiUrl, string $signatureToken): string
	{
		if (empty($apiUrl) || empty($signatureToken)) {
			return $url;
		}

		$endpoint = rtrim($apiUrl, '/') . '?' . http_build_query([
			'action'    => 'shorturl',
			'format'    => 'json',
			'signature' => $signatureToken,
			'url'       => $url,
		]);

		$ch = curl_init();
		curl_setopt_array($ch, [
			CURLOPT_URL            => $endpoint,
			CURLOPT_RETURNTRANSFER => true,
			CURLOPT_TIMEOUT        => 10,
		]);

		$response = curl_exec($ch);
		$httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
		curl_close($ch);

		if ($response === false || $httpCode < 200 || $httpCode >= 300) {
			return $url;
		}

		$data = json_decode($response, true);

		return $data['shorturl'] ?? $url;
	}
}