<?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 app\backend\controller;

use think\facade\Db;
use ywxapp\controller\BackendBase;
use ywxapp\library\AdminLogger;
use ywxapp\model\CommonAttachment;
use ywxapp\service\FileStorageService;

/**
 * 附件统一管理
 *
 * API 端（/api/v1/common/upload 等）负责收文件，后台这里做全局视角：
 * 全站附件一览（不分模块/不分上传者）、按条件检索、预览、删除（物理文件 + 软删记录）、容量统计。
 * 删除始终走 FileStorageService::delete()，OSS / FTP 等自定义存储由 FileDelete 事件接管，
 * 后台代码无需关心文件到底存在哪。
 *
 * 权限节点（首次访问自动补录）：attachment:index / attachment:delete
 *
 * @author ywxapp <admin@ywxapp.cn>
 */
class Attachment extends BackendBase
{
    use EnsuresPower;

    protected $noNeedLogin  = [];
    protected $noNeedVerify = [];

    /**
     * 进程内只补录一次权限
     * @var bool
     */
    protected static $powerChecked = false;

    protected function initialize()
    {
        if (!self::$powerChecked) {
            self::$powerChecked = true;
            $this->ensureMenus();
        }
    }

    /**
     * 列表 + 统计
     */
    public function index()
    {
        if ($this->request->isAjax()) {
            $page    = $this->request->param('page/d', 1);
            $limit   = $this->request->param('limit/d', 20);
            $kw      = trim((string) $this->request->param('keyword', ''));
            $module  = trim((string) $this->request->param('module', ''));
            $onlyImg = (int) $this->request->param('only_image/d', 0);

            $query = CommonAttachment::where('delete_at', 0);
            if ($kw !== '') {
                $query->where(function ($q) use ($kw) {
                    $q->where('original', 'like', '%' . $kw . '%')
                        ->whereOr('name', 'like', '%' . $kw . '%')
                        ->whereOr('path', 'like', '%' . $kw . '%');
                });
            }
            if ($module !== '') {
                $query->where('module', $module);
            }
            if ($onlyImg === 1) {
                $query->where('is_image', 1);
            }

            $total = (int) $query->count();
            $list  = $query->order('id', 'desc')->page($page, $limit)->select()->toArray();

            foreach ($list as &$row) {
                $row['size_text']     = $this->formatBytes((int) $row['size']);
                $row['create_at_text'] = $row['create_at'] ? date('Y-m-d H:i:s', (int) $row['create_at']) : '-';
            }
            $this->result->setCount($total)->success($list);
        }

        // 概览统计与模块清单（供页面筛选下拉）
        $stat = [
            'total' => (int) CommonAttachment::where('delete_at', 0)->count(),
            'size'  => (int) CommonAttachment::where('delete_at', 0)->sum('size'),
            'image' => (int) CommonAttachment::where('delete_at', 0)->where('is_image', 1)->count(),
        ];
        $stat['size_text'] = $this->formatBytes($stat['size']);
        $modules = Db::name('common_attachment')
            ->where('delete_at', 0)
            ->field('module, COUNT(*) AS total')
            ->group('module')
            ->select()
            ->toArray();

        $this->assign('stat', $stat);
        $this->assign('modules', $modules);

        return $this->fetch();
    }

    /**
     * 删除：物理删文件（可由事件接管）+ 软删记录
     */
    public function delete()
    {
        if (! $this->request->isPost()) {
            $this->result->error('请求方式错误', 405);
        }
        $ids = $this->request->param('ids', '');
        $ids = is_array($ids) ? $ids : array_filter(explode(',', (string) $ids));
        if (empty($ids)) {
            $this->result->error('请选择要删除的附件');
        }

        $storage = new FileStorageService();
        $ok      = 0;
        $fail    = 0;
        foreach ($ids as $id) {
            $row = CommonAttachment::find((int) $id);
            if (! $row) {
                $fail++;
                continue;
            }
            // 文件删不掉也要删记录，避免磁盘残留变成无法再管的孤儿
            $storage->delete((string) $row->path);
            $row->delete();
            $ok++;
        }

        AdminLogger::write('attachment/delete', '删除附件 ' . $ok . ' 个' . ($fail ? "（{$fail} 个不存在）" : ''));
        $this->result->success(['ok' => $ok, 'fail' => $fail], '已删除 ' . $ok . ' 个附件');
    }

    protected function formatBytes(int $bytes): string
    {
        if ($bytes <= 0) {
            return '0 B';
        }
        $units = ['B', 'KB', 'MB', 'GB'];
        $i     = (int) min(count($units) - 1, floor(log($bytes, 1024)));
        return round($bytes / (1024 ** $i), 2) . ' ' . $units[$i];
    }
}