<?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;

/**
 * 腾讯云 COS：简易 PUT（Authorization 签名 v5）
 */
class QcloudStorageService 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）
     *
     * 与上传不同，列举带查询参数，而 COS 签名 v5 把查询串算进 HttpString，
     * 且 q-url-param-list 必须和实际发出去的参数一一对应；因此这里自己拼查询串，
     * 不能交给 Http::get($url, $query) 去编码，否则签名和请求会对不上。
     */
    public function listObjects(string $prefix = '', string $marker = '', int $limit = 100): array
    {
        $this->assertConfig();
        $params = ['max-keys' => (string) $this->boundedLimit($limit)];
        $listPrefix = $this->scopedListPrefix($prefix);
        if ($listPrefix !== '') {
            $params['prefix'] = $listPrefix;
        }
        if ($marker !== '') {
            $params['marker'] = $marker;
        }
        ksort($params);
        $host = $this->host();
        $query = $this->buildQuery($params);
        $response = Http::withHeaders([
            'Host' => $host,
            'Authorization' => $this->authorization('GET', '/', $params),
        ])->get('https://' . $host . '/?' . $query);
        if (!$response->successful()) {
            UtilsService::getInstance()->errorThrow('腾讯云列举对象失败：' . $response->body());
        }
        return $this->parseObjectListXml($response->body(), 'https://' . $host);
    }

    public function deleteObject(string $key): bool
    {
        $this->assertConfig();
        $key = $this->normalizeObjectKey($key);
        if ($key === '') {
            return false;
        }
        $host = $this->host();
        $urlPath = '/' . $key;
        $response = Http::withHeaders([
            'Host' => $host,
            'Authorization' => $this->authorization('DELETE', $urlPath, []),
        ])->delete('https://' . $host . $urlPath);
        return $response->successful();
    }

    /**
     * COS 对象上传（Sign Algorithm=sha1）
     */
    private function uploadFile($filePath, string $key): bool|array
    {
        $this->assertConfig();
        $domain = rtrim((string) ($this->config['domain'] ?? ''), '/');
        $prefix = trim((string) ($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);
        $host = $this->host();
        $urlPath = '/' . ltrim($key, '/');
        $url = 'https://' . $host . $urlPath;
        $response = Http::withHeaders([
            'Host' => $host,
            'Authorization' => $this->authorization('PUT', $urlPath, []),
            'Content-Type' => 'application/octet-stream',
        ])->withBody($content, 'application/octet-stream')->put($url);
        if (!$response->successful()) {
            UtilsService::getInstance()->errorThrow('腾讯云上传失败：' . $response->body());
        }
        $publicUrl = $domain !== '' ? ($domain . $urlPath) : $url;
        return ['key' => $key, 'url' => $publicUrl];
    }

    /**
     * 签名 v5；上传、列举、删除共用，差别只在 method / 路径 / 查询参数
     *
     * @param array<string, string> $params 参与签名的查询参数（键需已排序）
     */
    private function authorization(string $method, string $urlPath, array $params): string
    {
        $secretId = (string) $this->config['access_key'];
        $secretKey = (string) $this->config['secret_key'];
        $host = $this->host();
        $now = time();
        $keyTime = $now . ';' . ($now + 600);
        $signKey = hash_hmac('sha1', $keyTime, $secretKey);
        $paramList = implode(';', array_map('strtolower', array_keys($params)));
        $httpString = strtolower($method) . "\n" . $urlPath . "\n" . $this->buildQuery($params)
            . "\nhost=" . strtolower($host) . "\n";
        $stringToSign = "sha1\n{$keyTime}\n" . sha1($httpString) . "\n";
        $signature = hash_hmac('sha1', $stringToSign, $signKey);
        return 'q-sign-algorithm=sha1'
            . '&q-ak=' . $secretId
            . '&q-sign-time=' . $keyTime
            . '&q-key-time=' . $keyTime
            . '&q-header-list=host'
            . '&q-url-param-list=' . $paramList
            . '&q-signature=' . $signature;
    }

    /**
     * 用 rawurlencode 拼查询串：COS 要求 RFC3986 编码，http_build_query 会把空格编成 +
     *
     * @param array<string, string> $params
     */
    private function buildQuery(array $params): string
    {
        $pairs = [];
        foreach ($params as $name => $value) {
            $pairs[] = strtolower(rawurlencode((string) $name)) . '=' . rawurlencode((string) $value);
        }
        return implode('&', $pairs);
    }

    private function host(): string
    {
        return $this->config['bucket'] . '.cos.' . $this->config['region'] . '.myqcloud.com';
    }

    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['region'] ?? '')) === ''
        ) {
            UtilsService::getInstance()->errorThrow('腾讯云 COS 配置不完整（需要 SecretId/SecretKey/Bucket/Region）');
        }
    }
}