<?php

namespace App\Service;

use Hyperf\Cache\Cache;
use Hyperf\Contract\TranslatorInterface;
use Hyperf\Contract\TranslatorLoaderInterface;
use Hyperf\Translation\Translator;
use App\Model\Translation as tModel;
use Psr\Container\ContainerInterface;
use function Hyperf\Config\config;

class TranslationService extends Translator implements TranslatorInterface
{
    protected Cache $cache;

    public function __construct(TranslatorLoaderInterface $loader, ContainerInterface $container)
    {
        parent::__construct($loader, 'zh_CN');
        $this->cache = $container->get(Cache::class);
    }

    public function get($key, array $replace = [], $locale = null, $fallback = true): array|string
    {
        $locale = $locale ?: $this->getLocale();

        $cacheKey = "lang:{$locale}:{$key}";
        // 先查缓存
        $cached = $this->cache->get($cacheKey);
        if ($cached !== null) {
            return $this->makeReplacements($cached, $replace);
        }
        // 查数据库
        $value = tModel::getLangValue($locale, $key);
        if ($value) {
            $this->cache->set($cacheKey, $value, (int)config("translation.ttl"));
            return $this->makeReplacements($value, $replace);
        }
        // 文件翻译
        $fallbackValue = parent::get($key, $replace, $locale, $fallback);
        // fallback 结果也缓存
        $this->cache->set($cacheKey, $fallbackValue, (int)config("translation.ttl"));
        return $fallbackValue;
    }
}