<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
namespace ywxapp\service;

use think\Exception;
use think\facade\Config;
use think\file\UploadedFile;
use ywxapp\utils\storage\StorageInterface;

/**
 * FileStorageService 类
 *
 * @author ywxapp <admin@ywxapp.cn>
 */
class FileStorageService
{
    // 驱动常量
    const DRIVER_LOCAL  = 'local';
    const DRIVER_ALIOSS = 'alioss';
    const DRIVER_QCOS   = 'qcos';

    protected $config;
    protected $storage;

    /**
     * 构造函数，读取配置并初始化驱动
     */
    public function __construct()
    {
        // 读取配置文件
        $this->config = Config::get('filesystem', []);
        // 获取当前配置的驱动名称
        $driverName = $this->config['default'] ?? self::DRIVER_LOCAL;
        // 实例化对应的驱动
        $this->initDriver($driverName);
    }

    /**
     * 初始化存储驱动
     */
    protected function initDriver(string $driverName): void
    {
        $drivers = $this->config['disks'] ?? [];
        if (! isset($drivers[$driverName])) {
            throw new Exception("存储驱动配置不存在: {$driverName}");
        }
        $config = $drivers[$driverName];
        $class  = $config['class'];
        if (! class_exists($class)) {
            throw new Exception("存储驱动类不存在: {$class}");
        }
        $this->storage = new $class($config);
        if (! $this->storage instanceof StorageInterface) {
            throw new Exception("存储驱动必须实现 StorageInterface 接口");
        }
    }

    /**
     * 上传文件（对外调用的方法）
     */
    public function upload(UploadedFile $file, string $path = '', array $options = []): array
    {

        // 1. 基础验证（例如文件大小、类型）
        $this->validateFile($file, $options);
        // 2. 如果未指定路径，生成默认路径
        if (empty($path)) {
            $path = $this->generatePath($file);
        }
        // throw new \think\Exception(json_encode( [
        //          $file->getoriginalName(), //获取文件原始名称带后缀
        //         $file->getSize(),               //获取文件大小
        //         $file->extension(),              //获取文件后缀
        //     ])
        //    , 403);
        // 3. 调用具体驱动的上传方法

        $data = [ 
            'module'    => $options['module'] ?? 'index', // 模块标识
            'original'  => $file->getoriginalName(),
            'size'      => $file->getSize(),
            'ext'       => $file->extension(),
            'mime'      => $file->getOriginalMime(),
            'mime'      => $file->getMime(),
            'storage'   => $this->config['default'] ?? self::DRIVER_LOCAL,
            'is_image'  => (int) str_starts_with($file->getMime(), 'image/'),
            'upload_ip' => request()->ip(),
        ];

        // 如果是图片且能获取到尺寸
        if ($data['is_image'] && function_exists('getimagesize')) {
            // 注意：如果是云存储，这里可能需要从临时文件获取尺寸
            $tempPath = $file->getRealPath();
            if (file_exists($tempPath)) {
                $imgInfo        = getimagesize($tempPath);
                $data['width']  = $imgInfo[0] ?? 0;
                $data['height'] = $imgInfo[1] ?? 0;
            }
        }

        list($name, $path, $url) = $this->storage->upload($file, $path, $options);
        $data['name']            = $name;
        $data['path']            = $path;
        $data['url']             = $url;

        return $data;
    }

    /**
     * 删除文件
     */
    public function delete(string $path): bool
    {
        return $this->storage->delete($path);
    }

    /**
     * 获取URL
     */
    public function getUrl(string $path): string
    {
        return $this->storage->getUrl($path);
    }

    /**
     * 基础文件验证
     */
    protected function validateFile(UploadedFile $file, array $options): void
    {

        // 使用验证器验证上传的文件
        validate(
            [
                'file' => [
                    // 限制文件大小(单位b)，这里限制为4M
                    'fileSize' => 4 * 1024 * 1024,
                    // 限制文件后缀，多个后缀以英文逗号分割
                    'fileExt'  => 'gif,jpg,png',
                    // fileSize 上传文件的最大字节;
                    // fileExt 文件后缀，多个用逗号分割或者数组;
                    // fileMime 文件MIME类型，多个用逗号分割或者数组;
                    // image 验证图像文件的尺寸和类型,
                ],
            ],
            [
                'file.fileSize' => '文件太大',
                'file.fileExt'  => '不支持的文件后缀',
            ]
        )->check(['file' => $file]);

    }

    /**
     * 生成唯一文件路径
     */
    protected function generatePath(UploadedFile $file): string
    {
        $ext      = $file->getClientOriginalExtension();
        $date     = date('Y/m/d');
        $filename = date('His') . '_' . uniqid() . ".{$ext}";
        return "{$date}/{$filename}";
    }

    /**
     * 魔术方法，允许直接调用驱动的其他特有方法
     */
    public function __call($method, $parameters)
    {
        if (method_exists($this->storage, $method)) {
            return call_user_func_array([$this->storage, $method], $parameters);
        }
        throw new \BadMethodCallException("Method {$method} does not exist.");
    }
}