import 'package:logging/logging.dart';
import 'package:nc_photos/account.dart';
import 'package:nc_photos/entity/file.dart';
import 'package:nc_photos/entity/file_util.dart' as file_util;
import 'package:nc_photos/exception.dart';
import 'package:nc_photos/use_case/create_dir.dart';
import 'package:path/path.dart' as path;

class Copy {
  Copy(this.fileRepo);

  /// Copy a file from its original location to [destination]
  Future<void> call(
    Account account,
    File file,
    String destination, {
    bool shouldCreateMissingDir = false,
    bool shouldOverwrite = false,
    bool shouldRenameOnOverwrite = false,
  }) =>
      _doWork(
        account,
        file,
        destination,
        shouldCreateMissingDir: shouldCreateMissingDir,
        shouldOverwrite: shouldOverwrite,
        shouldRenameOnOverwrite: shouldRenameOnOverwrite,
      );

  Future<void> _doWork(
    Account account,
    File file,
    String destination, {
    required bool shouldCreateMissingDir,
    required bool shouldOverwrite,
    required bool shouldRenameOnOverwrite,
    int retryCount = 1,
  }) async {
    final to = _renameDestination(destination, retryCount);
    if (retryCount > 1) {
      _log.info("[call] Retry with: '$to'");
    }
    try {
      await fileRepo.copy(account, file, to, shouldOverwrite: shouldOverwrite);
    } catch (e) {
      if (e is ApiException) {
        if (e.response.statusCode == 409 && shouldCreateMissingDir) {
          // no dir
          _log.info("[call] Auto creating parent dirs");
          await CreateDir(fileRepo)(account, path.dirname(to));
          await fileRepo.copy(account, file, to,
              shouldOverwrite: shouldOverwrite);
        } else if (e.response.statusCode == 204 && shouldRenameOnOverwrite) {
          return _doWork(
            account,
            file,
            to,
            shouldCreateMissingDir: shouldCreateMissingDir,
            shouldOverwrite: shouldOverwrite,
            shouldRenameOnOverwrite: shouldRenameOnOverwrite,
            retryCount: retryCount + 1,
          );
        } else {
          rethrow;
        }
      } else {
        rethrow;
      }
    }
  }

  String _renameDestination(String destination, int retryCount) {
    if (retryCount < 2) {
      return destination;
    }
    final newName =
        file_util.renameConflict(path.basename(destination), retryCount);
    return "${path.dirname(destination)}/$newName";
  }

  final FileRepo fileRepo;

  static final _log = Logger("use_case.copy.Copy");
}