<?php

namespace OAuth\Common\Http\Client;

/**
 * Abstract HTTP client.
 */
abstract class AbstractClient implements ClientInterface
{
    /**
     * @var string The user agent string passed to services
     */
    protected $userAgent;

    /**
     * @var int The maximum number of redirects
     */
    protected $maxRedirects = 5;

    /**
     * @var int The maximum timeout
     */
    protected $timeout = 15;

    /**
     * Creates instance.
     *
     * @param string $userAgent The UA string the client will use
     */
    public function __construct($userAgent = 'PHPoAuthLib')
    {
        $this->userAgent = $userAgent;
    }

    /**
     * @param int $redirects Maximum redirects for client
     *
     * @return ClientInterface
     */
    public function setMaxRedirects($redirects)
    {
        $this->maxRedirects = $redirects;

        return $this;
    }

    /**
     * @param int $timeout Request timeout time for client in seconds
     *
     * @return ClientInterface
     */
    public function setTimeout($timeout)
    {
        $this->timeout = $timeout;

        return $this;
    }

    /**
     * @param array $headers
     */
    public function normalizeHeaders($headers): array
    {
        $normalizeHeaders = [];
        foreach ($headers as $key => $val) {
            $val = ucfirst(strtolower($key)) . ': ' . $val;
            $normalizeHeaders[$key] = $val;
        }

        return $normalizeHeaders;
    }
}