<?php

declare(strict_types=1);

namespace Arcanedev\NoCaptcha\Utilities;

use Arcanedev\NoCaptcha\Contracts\Utilities\Request as RequestContract;
use Arcanedev\NoCaptcha\Exceptions\InvalidUrlException;

/**
 * Class     Request
 *
 * @author   ARCANEDEV <arcanedev.maroc@gmail.com>
 */
class Request implements RequestContract
{
    /* -----------------------------------------------------------------
     |  Properties
     | -----------------------------------------------------------------
     */

    /**
     * URL to request.
     *
     * @var string
     */
    protected $url;

    /* -----------------------------------------------------------------
     |  Getters & Setters
     | -----------------------------------------------------------------
     */

    /**
     * Set URL.
     *
     * @param  string  $url
     *
     * @return self
     */
    protected function setUrl($url)
    {
        $this->checkUrl($url);

        $this->url = $url;

        return $this;
    }

    /* -----------------------------------------------------------------
     |  Main Methods
     | -----------------------------------------------------------------
     */

    /**
     * Create an api request using curl.
     *
     * @return string
     */
    protected function curl()
    {
        $curl = curl_init();
        curl_setopt_array($curl, [
            CURLOPT_URL            => $this->url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_SSL_VERIFYPEER => false,
        ]);
        $result = curl_exec($curl);
        curl_close($curl);

        return $result;
    }

    /**
     * Run the request and get response.
     *
     * @param  string  $url
     * @param  bool    $curled
     *
     * @return string
     */
    public function send($url, $curled = true)
    {
        $this->setUrl($url);

        $result = ($this->isCurlExists() && $curled === true)
            ? $this->curl()
            : file_get_contents($this->url);

        return $this->checkResult($result) ? $result : '{}';
    }

    /* -----------------------------------------------------------------
     |  Check Methods
     | -----------------------------------------------------------------
     */

    /**
     * Check URL.
     *
     * @param  string  $url
     *
     * @throws \Arcanedev\NoCaptcha\Exceptions\InvalidUrlException
     */
    private function checkUrl(&$url): void
    {
        if ( ! is_string($url))
            throw new InvalidUrlException(
                'The url must be a string value, ' . gettype($url) . ' given'
            );

        $url = trim($url);

        if (empty($url))
            throw new InvalidUrlException('The url must not be empty');

        if (filter_var($url, FILTER_VALIDATE_URL) === false)
            throw new InvalidUrlException('The url [' . $url . '] is invalid');
    }

    /**
     * Check if curl exists.
     *
     * @return bool
     */
    private function isCurlExists(): bool
    {
        return function_exists('curl_version');
    }

    /**
     * Check Result.
     *
     * @param  string  $result
     *
     * @return bool
     */
    private function checkResult($result): bool
    {
        return is_string($result) && ! empty($result);
    }
}