<?php
// +----------------------------------------------------------------------
// | YwxApp [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2026-2036 http://ywxapp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Author: ywxapp<admin@ywxapp.cn>
// +----------------------------------------------------------------------
declare (strict_types = 1);

namespace addon\articles\controller\backend;

use addon\articles\library\ArticleSchema;
use addon\articles\model\ArticleAttachment;
use think\facade\Request;
use think\facade\View;
use ywxapp\controller\BackendBase;
use ywxapp\service\FileStorageService;

/**
 * 附件管理
 *
 * 上传走框架 FileStorageService（与 /upload 同源），这里额外做：
 *   - 后台专用：类型白名单 + 大小限制
 *   - 落库记录，便于统一查看与清理
 */
class Attachment extends BackendBase
{
    protected $noNeedVerify = [];

    /** 允许的文件类型 */
    private const ALLOW_EXT = ['jpg', 'jpeg', 'png', 'gif', 'webp', 'bmp',
                               'pdf', 'doc', 'docx', 'xls', 'xlsx', 'ppt', 'pptx',
                               'zip', 'rar', 'txt', 'csv'];

    /** 单文件上限（字节） */
    private const MAX_SIZE = 10485760; // 10MB

    protected function initialize()
    {
        parent::initialize();
        ArticleSchema::ensure();
    }

    public function index()
    {
        if (Request::isAjax()) {
            $page  = Request::param('page', 1);
            $limit = Request::param('limit', 15);
            $aid   = (int) Request::param('aid', 0);

            $query = ArticleAttachment::order('id', 'desc');
            if ($aid > 0) {
                $query->where('aid', $aid);
            }

            $paginator = $query->paginate(['list_rows' => $limit, 'page' => $page]);

            $rows = [];
            foreach ($paginator->items() as $f) {
                $rows[] = [
                    'id'        => $f->id,
                    'name'      => $f->name,
                    'url'       => $f->url,
                    'ext'       => $f->ext,
                    'size_text' => $f->size_text,
                    'aid'       => (int) $f->aid,
                    'create_at' => $f->create_at,
                ];
            }

            return json(['code' => 0, 'msg' => '', 'count' => $paginator->total(), 'data' => $rows]);
        }

        return View::fetch('attachment/index');
    }

    /**
     * 上传并记录
     */
    public function upload()
    {
        $file = Request::file('file');
        if (!$file || !$file->isValid()) {
            return json(['code' => 0, 'msg' => '未获取到上传文件']);
        }

        $ext = strtolower($file->extension());
        if (!in_array($ext, self::ALLOW_EXT, true)) {
            return json(['code' => 0, 'msg' => '不支持的文件类型：' . $ext]);
        }
        if ($file->getSize() > self::MAX_SIZE) {
            return json(['code' => 0, 'msg' => '文件不能超过 ' . (self::MAX_SIZE / 1048576) . 'MB']);
        }

        // 真实 MIME 二次校验（防改扩展名）
        $mime = (string) $file->getMime();
        if ($mime !== '' && preg_match('#^text/(x-)?php#i', $mime)) {
            return json(['code' => 0, 'msg' => '危险文件类型']);
        }

        try {
            $storage = new FileStorageService();
            $result  = $storage->upload($file, 'articles/' . date('Ymd'));

            $record = ArticleAttachment::record(
                is_array($result) ? $result : ['url' => (string) $result],
                (int) ($this->auth->info['uid'] ?? 0),
                (int) Request::post('aid', 0)
            );

            return json([
                'code' => 1,
                'msg'  => '上传成功',
                'data' => ['id' => $record->id, 'url' => $record->url],
            ]);
        } catch (\Throwable $e) {
            return json(['code' => 0, 'msg' => '上传失败：' . $e->getMessage()]);
        }
    }

    /**
     * 删除记录并尝试清理物理文件
     */
    public function delete($id = 0)
    {
        $id  = (int) ($id ?: Request::post('id', 0));
        $att = ArticleAttachment::find($id);
        if (!$att) {
            return json(['code' => 0, 'msg' => '记录不存在']);
        }

        // 删除物理文件（限定在 public 目录内，防目录穿越）
        $rel  = ltrim((string) $att->path, '/');
        $url  = ltrim((string) $att->url, '/');
        $root = rtrim((string) public_path(), DIRECTORY_SEPARATOR);

        foreach ([$rel, $url] as $candidate) {
            if ($candidate === '' || strpos($candidate, '..') !== false) {
                continue;
            }
            $full = $root . DIRECTORY_SEPARATOR . $candidate;
            if (is_file($full)) {
                @unlink($full);
                break;
            }
        }

        $att->delete();

        return json(['code' => 1, 'msg' => '已删除']);
    }
}