<?php
namespace ScummVM\Models;

use ScummVM\Objects\DownloadsSection;
use ScummVM\XMLParser;
use DeviceDetector\Parser\OperatingSystem as OsParser;

/**
 * The DownloadsModel will produce DownloadsSection objects.
 */
class DownloadsModel extends BasicModel
{
    /* Get all download entries. */
    public function getAllDownloads()
    {
        $sections = $this->getFromCache();
        if (is_null($sections)) {
            $fname = DIR_DATA . '/downloads.xml';
            /* Now parse the data. */
            $parser = new XMLParser();
            $parsedData = $parser->parseByFilename($fname);
            $sections = array();
            foreach (array_values($parsedData['downloads']['section']) as $value) {
                $sections[] = new DownloadsSection($value);
            }
            $this->saveToCache($sections);
        }
        return $sections;
    }

    /* Get all sections and their anchors. */
    public function getAllSections()
    {
        /* Get the list with all downloads/sections. */
        $downloads = $this->getAllDownloads();
        $sections = array();
        foreach ($downloads as $dsection) {
            if ($dsection->getAnchor() != '' && $dsection->getTitle() != '') {
                $sections[] = array(
                    'title' => $dsection->getTitle(),
                    'anchor' => $dsection->getAnchor(),
                );
            }
            foreach ($dsection->getSubSections() as $dsubsection) {
                $title = $dsubsection->getTitle();
                /**
                 * If there is no title for this subsection, use the section
                 * title instead.
                 */
                if (empty($title)) {
                    $title = $dsection->getTitle();
                }
                $anchor = $dsubsection->getAnchor();
                if (!empty($anchor)) {
                    $sections[] = array(
                        'title' => $title,
                        'anchor' => $anchor,
                    );
                }
            }
        }
        return $sections;
    }

    /* Get the recommended download */
    public function getRecommendedDownload()
    {
        if (!isset($_SERVER['HTTP_USER_AGENT'])) {
            return false;
        }

        $downloads = $this->getAllDownloads();

        $osParser = new OsParser();
        $osParser->setUserAgent($_SERVER['HTTP_USER_AGENT']);
        $os = $osParser->parse();

        foreach ($downloads as $dsection) {
            foreach ($dsection->getSubSections() as $dsubsection) {
                $version = array_values(
                    array_filter(
                        $dsubsection->getItems(),
                        function ($item) use ($os) {
                            if ($item->getUserAgent() != "") {
                                $ua = preg_quote($item->getUserAgent(), '/');
                                return preg_match("/({$ua})/i", $os['name']);
                            }
                        }
                    )
                );

                if ($version) {
                    $curItem = $version[0];
                    $url = str_replace('{$release}', RELEASE, $curItem->getURL());
                    sscanf($url, "/frs/scummvm/%s", $versionStr);
                    $version = substr($versionStr, 0, strpos($versionStr, "/"));
                    $name = strip_tags($curItem->getName());
                    $data = $curItem->getExtraInfo();
                    if (is_array($data)) {
                        $extra_text = $data['size'] . " ";
                        if ($data['ext'] == '.exe') {
                            $extra_text = $extra_text . 'Win32 ';
                        }

                        $extra_text .= $data['ext'] . " " . $data['msg'];
                    } else {
                        $extra_text = $data;
                    }

                    /*
                    Get the version information for our store releases for
                    Android and the Snap store. Since we can't rely on the
                    file names here, we set them via Constants.php
                    */
                    if ($os['name'] === 'Android') {
                        $version = RELEASE_ANDROID_STORE;
                    }

                    if ($os['name'] === 'Ubuntu') {
                        $version = RELEASE_SNAP_STORE;
                        $extra_text = '(snap install scummvm)';
                    }

                    return array(
                    'os' => $name,
                    'ver' => $version,
                    'desc' => $extra_text,
                    'url' => $url,
                    );
                }
            }
        }

        return false;
    }
}