<?php

namespace App\Service\common\upload;

use App\BaseApp\BaseNotAuthService;
use App\Service\common\oss\OssStorageInterface;
use Illuminate\Support\Facades\Storage;

/**
 * 本地磁盘上传；支持 domain / path_prefix 覆盖
 */
class LocalhostStorageService extends BaseNotAuthService implements OssStorageInterface
{
    use ObjectKeyNormalizeTrait;

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

    /**
     * 注入运行时配置（链式）
     */
    public function withConfig(array $config): static
    {
        $this->config = array_merge($this->config, $config);
        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);
    }

    /**
     * 扫本地磁盘目录
     *
     * 本地盘没有 marker 这种服务端游标，用「已列举条数」当偏移量模拟：
     * 先把文件名排序固定顺序，再按偏移切页，这样反复调用能稳定推进。
     * 代价是同步期间新增文件会让偏移错位，但素材同步是幂等的，下一轮就自愈。
     */
    public function listObjects(string $prefix = '', string $marker = '', int $limit = 100): array
    {
        $listPrefix = rtrim($this->scopedListPrefix($prefix), '/');
        $offset = max(0, (int) $marker);
        $files = Storage::allFiles($listPrefix);
        sort($files);
        $page = array_slice($files, $offset, $this->boundedLimit($limit));

        $items = [];
        foreach ($page as $file) {
            $key = $this->normalizeObjectKey($file);
            if ($key === '') {
                continue;
            }
            $realPath = Storage::path($file);
            $items[] = [
                'key' => $key,
                'size' => (int) Storage::size($file),
                // 本地盘没有服务端 ETag，用 md5 顶上，素材库靠它判重与校验
                'hash' => is_file($realPath) ? (string) md5_file($realPath) : '',
                'last_modified' => (int) Storage::lastModified($file),
                'url' => $this->publicUrlOf($key, asset('/storage/' . $key)),
            ];
        }

        $next = $offset + count($page);
        $finished = $next >= count($files);
        return [
            'items' => $items,
            'next_marker' => $finished ? '' : (string) $next,
            'finished' => $finished,
        ];
    }

    public function deleteObject(string $key): bool
    {
        $key = $this->normalizeObjectKey($key);
        if ($key === '') {
            return false;
        }
        return $this->deleteFile($key);
    }

    /**
     * 写入本地 storage；兼容 UploadedFile 与路径字符串
     */
    private function uploadFile(mixed $filePath, string $key): bool|array
    {
        $prefix = trim((string) ($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) $filePath;
        if (!Storage::put($key, file_get_contents($path))) {
            return false;
        }
        $domain = rtrim((string) ($this->config['domain'] ?? ''), '/');
        $url = $domain !== '' ? ($domain . '/' . $key) : asset('/storage/' . $key);
        return [
            'key' => $key,
            'url' => $url,
        ];
    }

    private function deleteFile(string $key): bool
    {
        return Storage::delete($key);
    }
}