<?php
namespace ScummVM\Models;

use Phpfastcache\Helper\Psr16Adapter;
use Phpfastcache\Drivers\Redis\Config;
use Phpfastcache\Exceptions\PhpfastcacheDriverException;

abstract class BasicModel
{
    const FILE_NOT_FOUND = 'The filename %s could not be found';

    protected static $cache;

    public function __construct()
    {
        if (is_null(self::$cache)) {
            try {
                $database = $_SERVER['HTTP_HOST'] === 'www.scummvm.org' ? 8 : 7;
                $config = new Config(['database' => $database]);
                self::$cache = new Psr16Adapter('redis', $config);
            } catch (PhpfastcacheDriverException $ex) {
                // Fallback to files based cache
                self::$cache = new Psr16Adapter('files');
            }
        }
    }

    protected function getLocalizedFile($filename) {
        global $lang;
        if (!$lang) {
            $lang = DEFAULT_LOCALE;
        }
        $localizedFilename = DIR_DATA . "/$lang/$filename";
        $defaultFilename = DIR_DATA . "/" . DEFAULT_LOCALE . "/$filename";
        if (is_file($localizedFilename) && is_readable($localizedFilename)) {
            return $localizedFilename;
        } elseif (is_file($defaultFilename) && is_readable($defaultFilename)) {
            return $defaultFilename;
        } else {
            throw new \ErrorException(\sprintf(self::FILE_NOT_FOUND, $filename));
        }
    }

    protected function saveToCache($data, $key = '')
    {
        if ($key) {
            $key = "_$key";
        }
        global $lang;
        $cacheKey = str_replace("\\", "_", \get_called_class() . $key . "_$lang");
        self::$cache->set($cacheKey, $data, 3600);
    }

    protected function getFromCache($key = '')
    {
        if ($key) {
            $key = "_$key";
        }
        global $lang;
        $cacheKey = str_replace("\\", "_", \get_called_class() . $key . "_$lang");
        $cachedData = self::$cache->get($cacheKey);
        return $cachedData;
    }
}