<?php

namespace Libs;

/**
 * CurlRequest - DuckBrain
 *
 * Facade for CURL.
 *
 * @author KJ
 * @website https://kj2.me
 * @licence MIT
 */
class CurlRequest
{
    public array $headers = [];
    public array $options = [
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_SSL_VERIFYHOST => false,
        CURLOPT_RETURNTRANSFER => true,
        CURLINFO_HEADER_OUT    => true,
    ];
    public int $statusCode = 0;
    protected string $responseHeaders = '';
    protected string $responseBody = '';

    /**
     * Sends the request.
     *
     * @param  array $options
     * @return void
     */
    protected function send(array $options): void
    {
        $handler = curl_init();

        $headers = [];
        foreach ($this->headers as $index => $value) {
            $headers[] = "$index: $value";
        }

        $options[CURLOPT_HTTPHEADER] = $headers;

        foreach ($this->options as $index => $option) {
            if (!isset($options[$index])) {
                $options[$index] = $option;
            }
        }

        curl_setopt_array($handler, $options);

        $this->responseBody    = curl_exec($handler);
        $this->responseHeaders = curl_getinfo($handler, CURLINFO_HEADER_OUT);
        $this->statusCode      = curl_getinfo($handler, CURLINFO_HTTP_CODE);
    }

    /**
     * Sends the request using the GET method.
     *
     * @param string $url
     * @param array  $args
     *
     * @return CurlRequest
     */
    public function get(string $url, array $args = []): CurlRequest
    {
        $this->send([
            CURLOPT_URL  => $url . '?' . http_build_query($args),
            CURLOPT_POST => false,
            CURLOPT_PUT  => false,
        ]);

        return $this;
    }

    /**
     * Sends the request using the POST method.
     *
     * @param string $url
     * @param string $fields
     *
     * @return CurlRequest
     */
    public function post(string $url, string $fields = ''): CurlRequest
    {
        $this->send([
            CURLOPT_URL        => $url,
            CURLOPT_POSTFIELDS => $fields,
        ]);

        return $this;
    }

    /**
     * Sends the request using the PUT method.
     *
     * @param string $url
     * @param string $fields
     *
     * @return CurlRequest
     */
    public function put(string $url, string $fields = ''): CurlRequest
    {
        $this->send([
            CURLOPT_URL           => $url,
            CURLOPT_CUSTOMREQUEST => 'PUT',
            CURLOPT_POSTFIELDS    => $fields,
        ]);

        return $this;
    }

    /**
     * Sends the request using the PATCH method.
     *
     * @param string $url
     * @param string $fields
     *
     * @return CurlRequest
     */
    public function patch(string $url, string $fields = ''): CurlRequest
    {
        $this->send([
            CURLOPT_URL            => $url,
            CURLOPT_CUSTOMREQUEST  => 'PATCH',
            CURLOPT_POSTFIELDS     => $fields,
        ]);

        return $this;
    }

    /**
     * Sends the request using the DELETE method.
     *
     * @param string $url
     * @param string $fields
     *
     * @return CurlRequest
     */
    public function delete(string $url, string $fields = ''): CurlRequest
    {
        $this->send([
            CURLOPT_URL            => $url,
            CURLOPT_CUSTOMREQUEST  => 'DELETE',
            CURLOPT_POSTFIELDS     => $fields,
        ]);

        return $this;
    }

    /**
     * Returns the response headers.
     *
     * @return string
     */
    public function headers(): string
    {
        return $this->responseHeaders;
    }

    /**
     * Returns the response body.
     *
     * @return string
     */
    public function body(): string
    {
        return $this->responseBody;
    }
}