import 'dart:typed_data';

import 'package:appwrite/appwrite.dart';

import '../appwrite_config.dart';

class AuftragStorageService {
  AuftragStorageService({Client? client})
      : _storage = Storage(client ?? appwriteClient),
        _account = Account(client ?? appwriteClient);

  final Storage _storage;
  final Account _account;

  Future<String> _uid() async {
    final u = await _account.get();
    return u.$id;
  }

  List<String> _filePermissions(String uid) => [
        Permission.read(Role.user(uid)),
        Permission.update(Role.user(uid)),
        Permission.delete(Role.user(uid)),
      ];

  Future<String> hochladenFoto(
    String auftragId,
    Uint8List bytes,
    String dateiname,
  ) async {
    final uid = await _uid();
    final fileId = ID.unique();
    await _storage.createFile(
      bucketId: kAppwriteBucketId,
      fileId: fileId,
      file: InputFile.fromBytes(
        bytes: bytes,
        filename: dateiname,
        contentType: 'image/jpeg',
      ),
      permissions: _filePermissions(uid),
    );
    return fileId;
  }

  Future<String> hochladenUnterschrift(String auftragId, Uint8List pngBytes) async {
    final uid = await _uid();
    final fileId = ID.unique();
    await _storage.createFile(
      bucketId: kAppwriteBucketId,
      fileId: fileId,
      file: InputFile.fromBytes(
        bytes: pngBytes,
        filename: 'unterschrift_$auftragId.png',
        contentType: 'image/png',
      ),
      permissions: _filePermissions(uid),
    );
    return fileId;
  }

  Future<Uint8List> getFileBytes(String fileId) async {
    return _storage.getFileView(
      bucketId: kAppwriteBucketId,
      fileId: fileId,
    );
  }

  /// Entfernt die Datei im Bucket (kein Fehler bei HTTP-URLs oder fehlenden Rechten).
  Future<void> loescheDatei(String fileId) async {
    if (fileId.startsWith('http://') || fileId.startsWith('https://')) {
      return;
    }
    try {
      await _storage.deleteFile(
        bucketId: kAppwriteBucketId,
        fileId: fileId,
      );
    } catch (_) {}
  }
}