<?php

namespace Qs;

use Qs_Array;
use Qs_Config;
use Qs_Options;

class GoogleFonts
{
    protected $basePath;
    protected $fonts = [];
    protected $userAgents = [];
    protected $userAgent;
    protected $browser;

    function __construct(array $options = [])
    {
        $options = array_merge(Qs_Config::getByInstance($this)->toArray(), $options);
        Qs_Options::setOptions($this, $options);
    }

    /**
     * @return mixed
     */
    public function getBasePath()
    {
        return $this->basePath;
    }

    /**
     * @param mixed $basePath
     * @return $this
     */
    public function setBasePath($basePath)
    {
        $this->basePath = $basePath;
        return $this;
    }

    /**
     * @return array
     */
    public function getFonts()
    {
        return $this->fonts;
    }

    /**
     * @param array $fonts
     * @return $this
     */
    public function setFonts($fonts)
    {
        $this->fonts = $fonts;
        return $this;
    }

    /**
     * @return array
     */
    public function getUserAgents()
    {
        return $this->userAgents;
    }

    /**
     * @param array $userAgents
     * @return $this
     */
    public function setUserAgents($userAgents)
    {
        $this->userAgents = $userAgents;
        return $this;
    }

    /**
     * @param null $browser
     * @return mixed
     */
    public function getUserAgent($browser = null)
    {
        if (null !== $browser) {
            return Qs_Array::get($this->userAgents, $browser);
        }
        return $this->userAgent;
    }

    /**
     * @param mixed $userAgent
     * @return $this
     */
    public function setUserAgent($userAgent)
    {
        $this->userAgent = $userAgent;
        return $this;
    }

    public function getStylesheet()
    {
        return Qs_Array::get($this->fonts, $this->getBrowser(), false);
    }

    public function getBrowser()
    {
        if (null === $this->browser) {
            $userAgent = $this->getUserAgent();
            if (preg_match('/MSIE/i', $userAgent)) {
                $this->browser = 'ie';
            } elseif (preg_match('/Firefox/i', $userAgent)) {
                $this->browser = 'firefox';
            } elseif (preg_match('/Chrome/i', $userAgent)) {
                $this->browser = 'chrome';
            } elseif (preg_match('/Safari/i', $userAgent)) {
                $this->browser = 'safari';
            } else {
                $this->browser = 'other';
            }
        }
        return $this->browser;
    }

    public function downloadAsBrowser($url, $fileName, $browser)
    {
        if ('//' == substr($url, 0, 2)) {
            $url = 'http:' . $url;
        }
        $userAgent = $this->getUserAgent($browser);
        $client = new \Zend\Http\Client($url, ['useragent' => $userAgent]);
        $response = $client->send();
        if ($response->getStatusCode() != 200) {
            trigger_error('Failed to download google fonts stylesheet. HTTP ' . $response->getStatusCode());
            return false;
        }
        $content = $response->getBody();
        $content = str_replace('http://', '//', $content);
        if (false === file_put_contents($this->basePath . '/' . $fileName, $content)) {
            trigger_error('Can\'t write file ' . $fileName);
            return false;
        }
        return true;
    }
}