<?php

namespace App\Service\common\upload;

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

/**
 * 阿里云 OSS：REST PutObject（Authorization 签名）
 */
class AliyunStorageService extends BaseNotAuthService implements OssStorageInterface
{
    use ObjectKeyNormalizeTrait;
    use ObjectListXmlTrait;

    protected array $config = [];

    public function withConfig(array $config): static
    {
        $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);
    }

    /**
     * 列举 bucket 对象（GET Bucket，V1 签名）
     *
     * prefix / marker / max-keys 都不是 OSS V1 的 sub-resource，不参与签名，
     * 所以 CanonicalizedResource 仍然只有 /bucket/，别照着 V4 的写法往里塞查询串。
     */
    public function listObjects(string $prefix = '', string $marker = '', int $limit = 100): array
    {
        $this->assertConfig();
        $bucket = (string) $this->config['bucket'];
        $host = $this->host();
        $date = gmdate('D, d M Y H:i:s \G\M\T');
        $query = ['max-keys' => $this->boundedLimit($limit)];
        $listPrefix = $this->scopedListPrefix($prefix);
        if ($listPrefix !== '') {
            $query['prefix'] = $listPrefix;
        }
        if ($marker !== '') {
            $query['marker'] = $marker;
        }
        $response = Http::withHeaders([
            'Date' => $date,
            'Authorization' => 'OSS ' . $this->config['access_key'] . ':'
                . $this->signature('GET', '', $date, '/' . $bucket . '/'),
        ])->get('https://' . $host . '/', $query);
        if (!$response->successful()) {
            UtilsService::getInstance()->errorThrow('阿里云列举对象失败：' . $response->body());
        }
        return $this->parseObjectListXml($response->body(), 'https://' . $host);
    }

    /**
     * 删除对象；OSS 对不存在的键也回 204，这里把它当成功处理
     */
    public function deleteObject(string $key): bool
    {
        $this->assertConfig();
        $key = $this->normalizeObjectKey($key);
        if ($key === '') {
            return false;
        }
        $date = gmdate('D, d M Y H:i:s \G\M\T');
        $resource = '/' . $this->config['bucket'] . '/' . $key;
        $response = Http::withHeaders([
            'Date' => $date,
            'Authorization' => 'OSS ' . $this->config['access_key'] . ':'
                . $this->signature('DELETE', '', $date, $resource),
        ])->delete('https://' . $this->host() . '/' . $key);
        return $response->successful();
    }

    /**
     * 使用 OSS V1 签名上传对象
     */
    private function uploadFile($filePath, string $key): bool|array
    {
        $this->assertConfig();
        $domain = rtrim((string) ($this->config['domain'] ?? ''), '/');
        $bucket = (string) $this->config['bucket'];
        $prefix = trim((string) ($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;
        $content = file_get_contents($path);
        $contentType = 'application/octet-stream';
        $date = gmdate('D, d M Y H:i:s \G\M\T');
        $signature = $this->signature('PUT', $contentType, $date, '/' . $bucket . '/' . $key);
        $url = 'https://' . $this->host() . '/' . $key;
        $response = Http::withHeaders([
            'Date' => $date,
            'Content-Type' => $contentType,
            'Authorization' => 'OSS ' . $this->config['access_key'] . ':' . $signature,
        ])->withBody($content, $contentType)->put($url);
        if (!$response->successful()) {
            UtilsService::getInstance()->errorThrow('阿里云上传失败：' . $response->body());
        }
        $publicUrl = $domain !== '' ? ($domain . '/' . $key) : $url;
        return ['key' => $key, 'url' => $publicUrl];
    }

    /**
     * OSS V1 签名：上传、列举、删除共用同一套 StringToSign 拼法
     */
    private function signature(string $method, string $contentType, string $date, string $resource): string
    {
        $stringToSign = "{$method}\n\n{$contentType}\n{$date}\n{$resource}";
        return base64_encode(hash_hmac('sha1', $stringToSign, (string) $this->config['secret_key'], true));
    }

    /**
     * 请求主机名；支持配置里填 oss-cn-xxx.aliyuncs.com 或已带 bucket 的域名
     */
    private function host(): string
    {
        $bucket = (string) ($this->config['bucket'] ?? '');
        $host = (string) preg_replace('#^https?://#', '', rtrim((string) ($this->config['endpoint'] ?? ''), '/'));
        if (!str_starts_with($host, $bucket . '.')) {
            $host = $bucket . '.' . $host;
        }
        return $host;
    }

    private function assertConfig(): void
    {
        if (trim((string) ($this->config['access_key'] ?? '')) === ''
            || trim((string) ($this->config['secret_key'] ?? '')) === ''
            || trim((string) ($this->config['bucket'] ?? '')) === ''
            || trim((string) ($this->config['endpoint'] ?? '')) === ''
        ) {
            UtilsService::getInstance()->errorThrow('阿里云 OSS 配置不完整（需要 AccessKey/Secret/Bucket/Endpoint）');
        }
    }
}