<?php

namespace App\Service\common\upload;

use App\BaseApp\BaseNotAuthService;
use App\Service\common\oss\OssStorageInterface;
use App\Service\common\UtilsService;

/**
 * 七牛云上传；优先使用官方 SDK，未安装时给出明确提示
 */
class QiniuStorageService extends BaseNotAuthService implements OssStorageInterface
{
    use ObjectKeyNormalizeTrait;

    protected array $config = [
        'access_key' => '',
        'secret_key' => '',
        'bucket' => '',
        'domain' => '',
        'path_prefix' => '',
    ];

    /** 同一次请求里复用，避免每页列举都去 UC 查一遍区域 */
    private ?\Qiniu\Storage\BucketManager $cachedBucketMgr = null;

    private string $cachedBucketMgrKey = '';

    /**
     * 注入解密后的运行时配置
     */
    public function withConfig(array $config): static
    {
        $this->config = array_merge($this->config, $config);
        $this->cachedBucketMgr = null;
        $this->cachedBucketMgrKey = '';
        return $this;
    }

    public function uploadImage($filePath, string $key): bool|array
    {
        return $this->uploadFile($filePath, $key);
    }

    public function uploadVideo($filePath, string $key): bool|array
    {
        return $this->uploadFile($filePath, $key);
    }

    public function deleteImage($key): bool
    {
        return $this->deleteFile($key);
    }

    public function deleteVideo($key): bool
    {
        return $this->deleteFile($key);
    }

    /**
     * 列举空间对象（BucketManager::listFiles，marker 分页）
     *
     * 七牛只在还有下一页时才回 marker，所以 marker 为空即等于列完了。
     * 列举结果的 key 必须用服务端原值，不能再套 path_prefix，
     * 否则根目录历史文件会被改写成 uploads/b_xxx.jpg。
     */
    public function listObjects(string $prefix = '', string $marker = '', int $limit = 100): array
    {
        $bucketMgr = $this->bucketManager();
        $bucket = (string) ($this->config['bucket'] ?? '');
        $listPrefix = $this->scopedListPrefix($prefix);
        [$ret, $err] = $bucketMgr->listFiles(
            $bucket,
            $listPrefix !== '' ? $listPrefix : null,
            $marker !== '' ? $marker : null,
            $this->boundedLimit($limit)
        );
        if ($err !== null) {
            UtilsService::getInstance()->errorThrow('七牛云列举对象失败：' . $this->errorText($err));
        }

        $ret = is_array($ret) ? $ret : [];
        $rawItems = $ret['items'] ?? $ret['Items'] ?? [];
        // 个别 SDK 版本成功时直接回文件数组，而不是 {items: [...]}
        if ($rawItems === [] && isset($ret[0]) && is_array($ret[0])) {
            $rawItems = $ret;
        }

        $items = [];
        foreach ((array) $rawItems as $row) {
            if (!is_array($row)) {
                continue;
            }
            $key = $this->normalizeListedKey((string) ($row['key'] ?? ''));
            if ($key === '' || str_ends_with($key, '/')) {
                continue;
            }
            $items[] = [
                'key' => $key,
                'size' => (int) ($row['fsize'] ?? 0),
                'hash' => (string) ($row['hash'] ?? ''),
                // putTime 的单位是 100 纳秒，当秒用会得到五亿年后的时间戳
                'last_modified' => intdiv((int) ($row['putTime'] ?? 0), 10000000),
                'url' => $this->publicUrlOf($key),
            ];
        }

        $next = (string) ($ret['marker'] ?? '');
        return [
            'items' => $items,
            'next_marker' => $next,
            'finished' => $next === '',
        ];
    }

    public function deleteObject(string $key): bool
    {
        return $this->deleteFile($this->normalizeListedKey($key));
    }

    /**
     * 上传到七牛；无 SDK 时抛业务异常引导安装或改本地
     */
    private function uploadFile($filePath, string $key): bool|array
    {
        if (!class_exists(\Qiniu\Auth::class)) {
            UtilsService::getInstance()->errorThrow('未安装 qiniu/php-sdk，请改用本地存储或安装依赖');
        }
        $accessKey = (string) ($this->config['access_key'] ?? '');
        $secretKey = (string) ($this->config['secret_key'] ?? '');
        $bucket = (string) ($this->config['bucket'] ?? '');
        $domain = rtrim((string) ($this->config['domain'] ?? ''), '/');
        if ($accessKey === '' || $secretKey === '' || $bucket === '') {
            UtilsService::getInstance()->errorThrow('七牛云配置不完整');
        }
        $prefix = trim((string) ($this->config['path_prefix'] ?? ''), '/');
        if ($prefix !== '' && !str_starts_with($key, $prefix . '/')) {
            $key = $prefix . '/' . ltrim($key, '/');
        }
        $path = is_object($filePath) && method_exists($filePath, 'getRealPath')
            ? $filePath->getRealPath()
            : (string) $filePath;
        $auth = new \Qiniu\Auth($accessKey, $secretKey);
        $token = $auth->uploadToken($bucket);
        $uploadMgr = new \Qiniu\Storage\UploadManager();
        list($ret, $err) = $uploadMgr->putFile($token, $key, $path);
        if ($err !== null) {
            return false;
        }
        return [
            'key' => $ret['key'],
            'url' => $domain . '/' . $ret['key'],
        ];
    }

    private function deleteFile(string $key): bool
    {
        $err = $this->bucketManager()->delete((string) $this->config['bucket'], $key);
        return $err === null;
    }

    /**
     * 构造 BucketManager，顺手把「没装 SDK / 没填配置」两种情况前置拦掉
     *
     * 必须走 HTTPS：SDK 默认 HTTP，部分机房出网只放行 443，列举会直接空失败。
     */
    private function bucketManager(): \Qiniu\Storage\BucketManager
    {
        if (!class_exists(\Qiniu\Auth::class)) {
            UtilsService::getInstance()->errorThrow('未安装 qiniu/php-sdk，请改用本地存储或安装依赖');
        }
        $accessKey = trim((string) ($this->config['access_key'] ?? ''));
        $secretKey = trim((string) ($this->config['secret_key'] ?? ''));
        $bucket = trim((string) ($this->config['bucket'] ?? ''));
        $missing = [];
        if ($accessKey === '') {
            $missing[] = 'AccessKey';
        }
        if ($secretKey === '') {
            $missing[] = 'SecretKey';
        }
        if ($bucket === '') {
            $missing[] = 'Bucket';
        }
        if ($missing !== []) {
            UtilsService::getInstance()->errorThrow(
                '七牛云配置不完整，缺少：' . implode('、', $missing) . '。请到「系统配置 → 存储」重新填写后保存'
            );
        }
        $cacheKey = $accessKey . "\0" . $bucket;
        if ($this->cachedBucketMgr !== null && $this->cachedBucketMgrKey === $cacheKey) {
            return $this->cachedBucketMgr;
        }
        $sdkConfig = new \Qiniu\Config();
        $sdkConfig->useHTTPS = true;
        $this->cachedBucketMgr = new \Qiniu\Storage\BucketManager(
            new \Qiniu\Auth($accessKey, $secretKey),
            $sdkConfig
        );
        $this->cachedBucketMgrKey = $cacheKey;
        return $this->cachedBucketMgr;
    }

    /**
     * SDK 的错误对象没有统一契约，转成人能看懂的一行字
     */
    private function errorText(mixed $err): string
    {
        if (is_object($err) && method_exists($err, 'message')) {
            $text = trim((string) $err->message());
            if ($text !== '') {
                return $text;
            }
        }
        if (is_object($err) && method_exists($err, 'code')) {
            return 'HTTP ' . $err->code();
        }
        if (is_object($err) || is_array($err)) {
            return (string) json_encode($err, JSON_UNESCAPED_UNICODE);
        }
        return (string) $err;
    }
}