<?php
/* Copyright (C) 2008-2011  Laurent Destailleur     <eldy@users.sourceforge.net>
 * Copyright (C) 2005-2016  Regis Houssin           <regis.houssin@inodbox.com>
 * Copyright (C) 2012       J. Fernando Lagrange    <fernando@demo-tic.org>
 * Copyright (C) 2015       Raphaël Doursenaud      <rdoursenaud@gpcsolutions.fr>
 * Copyright (C) 2023       Eric Seigne      		<eric.seigne@cap-rel.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 * or see https://www.gnu.org/
 */

/**
 * Class for AI
 */
class Ai
{

	/**
	 * @var DoliDB $db Database object
	 */
	protected $db;
	/**
	 * @var string $apiEndpoint
	 */
	private $apiEndpoint;

	/**
	 * @var string $apiKey
	 */
	private $apiKey;

	/**
	 * Constructor
	 *
	 * @param   string  $apiEndpoint       Endpoint of api
	 * @param   boolean $apiKey   key of api
	 */
	public function __construct($apiEndpoint, $apiKey)
	{
		$this->apiEndpoint = $apiEndpoint;
		$this->apiKey = $apiKey;
	}

	/**
	 * Generate response of instructions
	 * @param   string  $instructions   instruction for generate content
	 * @return   mixed   $response
	 */
	public function generateContent($instructions)
	{
		try {
			$ch = curl_init($this->apiEndpoint);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
			curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(['prompt' => $instructions]));
			curl_setopt($ch, CURLOPT_HTTPHEADER, [
				'Authorization: Bearer ' . $this->apiKey,
				'Content-Type: application/json'
			]);

			$response = curl_exec($ch);

			if (curl_errno($ch)) {
				throw new Exception('cURL error: ' . curl_error($ch));
			}

			$statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
			if ($statusCode != 200) {
				throw new Exception('API request failed with status code ' . $statusCode);
			}

			return $response;
		} catch (Exception $e) {
			error_log($e->getMessage());
			return null;
		} finally {
			curl_close($ch);
		}
	}
}