<?php

namespace App\Providers;

use App\Models\CostUnit;
use App\ValueObjects\InvoiceFile;
use Illuminate\Http\UploadedFile;
use Illuminate\Support\Facades\Storage;

class UploadFileProvider {
    private UploadedFile $file;
    private CostUnit $costUnit;

    public function __construct(UploadedFile $file, CostUnit $costUnit) {
        $this->file = $file;
        $this->costUnit = $costUnit;
    }

    /**
     * Das Ablageverzeichnis der Belege einer Kostenstelle, relativ zur Disk `local`
     * (Wurzel `storage/app/private`).
     *
     * Öffentlich, weil Belege nicht nur aus einem Upload entstehen: Eine Beitragserstattung erzeugt ihren
     * Eigenbeleg im Speicher und legt ihn über den FileWriteProvider ab -- landen soll er trotzdem dort,
     * wo alle anderen Belege liegen.
     */
    public static function directoryFor(CostUnit $costUnit) : string {
        return sprintf('%1$s/invoices/%2$s', app('tenant')->slug, $costUnit->id);
    }

    public function saveUploadedFile() : ?InvoiceFile {
        try {
            $directory = self::directoryFor($this->costUnit);

            $filename = $this->normalizeFilename($this->file->getClientOriginalName());

            $path = $this->file->storeAs(
                $directory,
                $filename
            );

            $invoiceFile = new InvoiceFile();
            $invoiceFile->filename = $filename;
            $invoiceFile->fullPath = $path;
            return $invoiceFile;
        } catch (\Exception $e) {
            return null;
        }
    }

    private function normalizeFilename(string $filename) : string {
        return strtolower($filename)
            |> function (string $filename) : string { return str_replace(' ', '_', $filename); }
            |> function (string $filename) : string { return str_replace('ä', 'ae', $filename); }
            |> function (string $filename) : string { return str_replace('ö', 'oe', $filename); }
            |> function (string $filename) : string { return str_replace('ü', 'ue', $filename); }
            |> function (string $filename) : string { return str_replace('ß', 'ss', $filename); };

    }
}