<?php

namespace App\Module\File\Logics;

use App\Module\File\Config\StorageConfig;
use App\Module\File\Events\FileDeletedEvent;
use App\Module\File\Events\FileUploadedEvent;
use App\Module\File\Events\ImageDeletedEvent;
use App\Module\File\Events\ImageUploadedEvent;
use App\Module\File\Models\FileFile;
use App\Module\File\Models\FileImg;
use App\Module\File\Services\ImgService;
use App\Module\File\Services\TemporaryService;
use App\Module\File\Services\UploadService;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage as FacadesStorage;

/**
 * 文件逻辑类
 *
 * 实现文件操作的具体逻辑
 */
class FileLogic
{
    /**
     * 上传文件
     *
     * @param UploadedFile $file 上传的文件
     * @param int $userId 用户ID
     * @param string $reType 关联类型
     * @param int $reId 关联ID
     * @return FileFile 文件模型
     */
    public function uploadFile(UploadedFile $file, int $userId, string $reType = '', int $reId = 0)
    {
        $dirLogic = new DirLogic();
        $dir = $dirLogic->getDir($userId);
        $path = $dir . '/' . uniqid() . '.' . $file->getClientOriginalExtension();

        $disk = StorageConfig::getStorage();
        $res = FacadesStorage::disk($disk)->putFileAs(dirname($path), $file, basename($path));

        if ($res === false) {
            throw new \Exception('服务器错误,请联系客服.');
        }

        $fileModel = new FileFile();
        $fileModel->path = $path;
        $fileModel->re_type = $reType;
        $fileModel->re_id = $reId;
        $fileModel->o_name = $file->getClientOriginalName();
        $fileModel->fsize = $file->getSize();
        $fileModel->type1 = $file->getClientOriginalExtension();
        $fileModel->save();

        // 触发文件上传事件
        event(new FileUploadedEvent($fileModel));

        return $fileModel;
    }

    /**
     * 上传图片
     *
     * @param UploadedFile $file 上传的图片
     * @param int $userId 用户ID
     * @param bool $private 是否私有
     * @param string $reType 关联类型
     * @param int $reId 关联ID
     * @return FileImg 图片模型
     */
    public function uploadImage(UploadedFile $file, int $userId, bool $private = false, string $reType = '', int $reId = 0)
    {
        $uploader = new UploadService($userId);
        $fileImg = $uploader->uploadImg($file, $private);

        if (!empty($reType) && $reId > 0) {
            $fileImg->re_type = $reType;
            $fileImg->re_id = $reId;
            $fileImg->save();
        }

        // 触发图片上传事件
        event(new ImageUploadedEvent($fileImg));

        return $fileImg;
    }

    /**
     * 获取文件URL
     *
     * @param int $fileId 文件ID
     * @return string 文件URL
     */
    public function getFileUrl(int $fileId)
    {
        $file = FileFile::find($fileId);
        if (!$file) {
            return '';
        }

        $disk = StorageConfig::getStorage();
        return FacadesStorage::disk($disk)->url($file->path);
    }

    /**
     * 获取图片URL
     *
     * @param int $imageId 图片ID
     * @param bool $private 是否私有
     * @return string 图片URL
     */
    public function getImageUrl(int $imageId, bool $private = false)
    {
        $imgService = new ImgService();
        return $imgService->getPicUrl4Id($imageId, $private);
    }

    /**
     * 删除文件
     *
     * @param int $fileId 文件ID
     * @return bool 是否成功
     */
    public function deleteFile(int $fileId)
    {
        $file = FileFile::find($fileId);
        if (!$file) {
            return false;
        }

        $disk = StorageConfig::getStorage();
        $path = $file->path;
        $result = $file->delete();

        if ($result) {
            // 触发文件删除事件
            event(new FileDeletedEvent($fileId, $path, $disk));
        }

        return $result;
    }

    /**
     * 删除图片
     *
     * @param int $imageId 图片ID
     * @return bool 是否成功
     */
    public function deleteImage(int $imageId)
    {
        $image = FileImg::find($imageId);
        if (!$image) {
            return false;
        }

        $path = $image->path;
        $disk = $image->storage_disk;
        $result = $image->delete();

        if ($result) {
            // 触发图片删除事件
            event(new ImageDeletedEvent($imageId, $path, $disk));
        }

        return $result;
    }

    /**
     * 保存临时文件
     *
     * @param string $ext 文件扩展名
     * @param string $content 文件内容
     * @return string 临时文件路径
     */
    public function saveTempFile(string $ext, string $content)
    {
        $temporaryService = new TemporaryService();
        return $temporaryService->save($ext, $content);
    }

    /**
     * 获取临时文件URL
     *
     * @param string $path 临时文件路径
     * @return string 临时文件URL
     */
    public function getTempFileUrl(string $path)
    {
        $temporaryService = new TemporaryService();
        return $temporaryService->getDownUrl($path);
    }
}