import 'dart:async';
import 'dart:math';

import 'package:common_utils/common_utils.dart';
import 'package:dio/dio.dart';
import 'package:tencentcloud_cos_sdk_plugin/cos.dart';
import 'package:tencentcloud_cos_sdk_plugin/cos_transfer_manger.dart';
import 'package:tencentcloud_cos_sdk_plugin/pigeon.dart';

class UploadOss {
  static final UploadOss _shared = UploadOss._internal();
  factory UploadOss() => _shared;

  static const bucket = 'deepsound-1253517901';
  static const region = 'ap-guangzhou';

  static CosTransferManger? _cosTransferManger;

  UploadOss._internal();

  static Future<CosTransferManger> getTransferManger() async {
    if (_cosTransferManger == null) {
      await Cos().initWithPlainSecret('AKID9F8qNiqlTzIMFwQ9rQxNcgYCdsukNmzA',
          'OYVGo8HEzWpvpfHgtfHfqpcDbnlY7Tdc');
      if (Cos().hasTransferManger(region)) {
        _cosTransferManger = Cos().getTransferManger(region);
      } else {
        CosXmlServiceConfig serviceConfig = CosXmlServiceConfig(
          region: region,
          isHttps: true,
        );
        _cosTransferManger = await Cos().registerTransferManger(
            region, serviceConfig..region = region, TransferConfig());
      }
    }
    return _cosTransferManger!;
  }

  static Future<String> upload({
    String? filepath,
    String rootDir = 'file',
    String? fileType,
    Function? callback,
    ProgressCallback? onSendProgress,
  }) async {
    String pathName =
        '$rootDir/${getDate()}/${getRandom(12)}.${fileType ?? getFileType(filepath!)}';
    CosTransferManger cosTransferManger = await getTransferManger();
    final completer = Completer<String>();
    await cosTransferManger.upload(
      bucket,
      pathName,
      filePath: filepath,
      resultListener: ResultListener(
        (Map<String?, String?>? header, CosXmlResult? result) {
          final url = result?.accessUrl ??
              'https://$bucket.cos.$region.myqcloud.com/$pathName';
          completer.complete(url);
        },
        (clientException, serviceException) {
          completer.completeError(clientException ??
              serviceException ??
              Exception('Unknown error'));
        },
      ),
    );
    return completer.future;
  }

  static String getDate() {
    DateTime now = DateTime.now();
    return DateUtil.formatDate(now, format: 'yyyy/MM/dd');
  }

  static String getRandom(int num) {
    String alphabet = 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM';
    String left = '';
    for (var i = 0; i < num; i++) {
      left = left + alphabet[Random().nextInt(alphabet.length)];
    }
    return left;
  }

  static String getFileType(String path) {
    List<String> array = path.split('.');
    return array[array.length - 1];
  }
}