<?php

namespace App\Support;

use Illuminate\Http\UploadedFile;

final class MailAttachments
{
    public const MAX_FILES = 10;

    public const RULE = 'file|mimes:pdf,doc,docx,xls,xlsx,ppt,pptx,txt,csv,zip,rar,jpg,jpeg,png,gif,webp|max:20480';

    private const MAX_TOTAL_KB = 25 * 1024;

    private const DISK = 'local';

    /**
     * @return array<string, string>
     */
    public static function rules(): array
    {
        return [
            'attachments'   => 'nullable|array|max:' . self::MAX_FILES,
            'attachments.*' => self::RULE,
        ];
    }

    /**
     * @param array<int, UploadedFile> $uploads
     * @return array<int, array{disk: string, path: string, name: string}>
     */
    public static function store(array $uploads, string $directory): array
    {
        $totalKb = array_sum(array_map(fn (UploadedFile $file) => $file->getSize() / 1024, $uploads));
        abort_if($totalKb > self::MAX_TOTAL_KB, 422, 'Tổng dung lượng tệp đính kèm không được vượt quá 25MB.');

        return array_map(fn (UploadedFile $file) => [
            'disk' => self::DISK,
            'path' => $file->store($directory, self::DISK),
            'name' => $file->getClientOriginalName(),
        ], $uploads);
    }
}