<?php
declare(strict_types=1);

namespace App\Controllers;

use App\Access;
use App\Attachments;
use App\Auth;
use App\Settings;
use App\Storage;
use App\Uploads;

class AttachmentController
{
    public function node(): void
    {
        $this->requireLogin();
        $nodeId = (int)($_GET['id'] ?? 0);
        $node   = Access::node($nodeId);   // 含 family_id / activity_id / activity_title

        view('nodes/attachments', [
            'node'        => $node,
            'attachments' => Attachments::forTarget(Attachments::TARGET_NODE, $nodeId),
            'maxMb'       => (int)Settings::get('photo_max_mb', '12'),
            'driverLabel' => Storage::label(),
            'pageTitle'   => '节点照片：' . ($node['title'] ?: '无标题'),
        ]);
    }

    /**
     * 上传附件。
     *
     * 一个请求里同时收两类东西：
     *   files[]   —— 普通 multipart 文件（照片原图、PDF、视频……）
     *   cropped[] —— 前端裁好的图片，JSON 字符串 {"name":..,"data":"data:image/...;base64,.."}
     * 分开传是为了省流量：没裁的照片原图直传，裁过的才走 base64。
     *
     * 真正的处理逻辑在 App\Uploads —— 节点表单里的附件走同一份代码，
     * 免得两边的 MIME 白名单/大小上限/孤儿文件回滚各写一套、慢慢走偏。
     */
    public function upload(): void
    {
        $this->requireLogin();

        // 请求体超过 post_max_size 时 PHP 会把 $_POST 和 $_FILES 整个丢掉，
        // 紧接着的 csrf_check() 必然失败、报「请求已过期」，用户完全看不懂。
        // 提前认出来，给一句能行动的话。
        if (Uploads::requestTooLarge()) {
            $nodeId = (int)($_POST['node_id'] ?? $_GET['node_id'] ?? 0);
            flash('error', '一次上传的内容超过服务器上限（' . ini_get('post_max_size')
                . '），请分批上传。');
            redirect('attachments/node', ['id' => $nodeId]);
        }

        csrf_check();

        $nodeId = (int)($_POST['node_id'] ?? 0);
        $node   = Access::node($nodeId);

        $uploaderId = (int)Auth::id();
        $target     = Attachments::TARGET_NODE;

        $files = Uploads::handleFiles($_FILES['files'] ?? [], $target, $nodeId, $uploaderId, 0);
        $crop  = Uploads::handleCropped((string)($_POST['cropped'] ?? ''), $target, $nodeId,
            $uploaderId, $files['count']);

        $uploaded = $files['uploaded'] + $crop['uploaded'];
        $errors   = array_merge($files['errors'], $crop['errors']);
        $count    = $crop['count'];

        if ($count === 0 && $uploaded === 0) {
            flash('error', '没有选择任何文件');
            redirect('attachments/node', ['id' => $nodeId]);
        }

        $msg = "成功上传 {$uploaded} 个文件（存到" . Storage::label() . '）';
        if (!empty($errors)) {
            $msg .= '；失败 ' . count($errors) . ' 个：' . implode('；', array_slice($errors, 0, 5));
        }
        if (Storage::ossMisconfigured()) {
            $msg .= '｜注意：已选择 OSS 但配置不完整，本次实际存到了本站服务器';
        }

        flash('error', $msg);
        redirect('attachments/node', ['id' => $nodeId], 'photos');
    }

    public function destroy(): void
    {
        $this->requireLogin();
        csrf_check();

        $id  = (int)($_POST['id'] ?? 0);
        $att = Attachments::find($id);
        if (!$att || $att['target_type'] !== Attachments::TARGET_NODE) {
            flash('error', '附件不存在');
            redirect('activities/index');
        }

        $node = Access::node((int)$att['target_id']);   // 顺带做归属校验
        Attachments::delete($id);

        flash('error', '照片已删除');
        redirect('attachments/node', ['id' => (int)$node['id']], 'photos');
    }

    private function requireLogin(): void
    {
        if (!Auth::check()) {
            redirect('auth/login');
        }
    }
}