import 'package:dio/dio.dart';
import 'package:miaoji_zhang/shared/update/update_config.dart';
import 'package:miaoji_zhang/shared/update/update_models.dart';

enum UpdateFailureKind { unavailable, rateLimited, network, invalidResponse }

class UpdateCheckException implements Exception {
  final UpdateFailureKind kind;
  final String message;

  const UpdateCheckException(this.kind, this.message);

  @override
  String toString() => message;
}

class UpdateApi {
  UpdateApi({Dio? dio})
    : _dio =
          dio ??
          Dio(
            BaseOptions(
              baseUrl: UpdateConfig.baseUrl,
              connectTimeout: const Duration(seconds: 8),
              receiveTimeout: const Duration(seconds: 15),
              sendTimeout: const Duration(seconds: 8),
            ),
          );

  final Dio _dio;

  Future<UpdateCheckResponse> check({
    required String platform,
    required String channel,
    required int currentBuild,
  }) async {
    try {
      final response = await _dio.get<Object?>(
        '/api/client/v1/update',
        queryParameters: {
          'appKey': UpdateConfig.appKey,
          'platform': platform,
          'channel': channel,
          'currentBuild': currentBuild,
        },
      );
      final data = response.data;
      if (data is! Map) {
        throw const UpdateCheckException(
          UpdateFailureKind.invalidResponse,
          '更新服务返回格式异常',
        );
      }
      return UpdateCheckResponse.fromJson(Map<String, dynamic>.from(data));
    } on DioException catch (error) {
      switch (error.response?.statusCode) {
        case 404:
          throw const UpdateCheckException(
            UpdateFailureKind.unavailable,
            '当前版本尚未配置更新渠道',
          );
        case 429:
          throw const UpdateCheckException(
            UpdateFailureKind.rateLimited,
            '检查更新过于频繁，请稍后再试',
          );
      }
      throw const UpdateCheckException(
        UpdateFailureKind.network,
        '暂时无法连接更新服务，请检查网络后重试',
      );
    } on UpdateCheckException {
      rethrow;
    } on FormatException catch (error) {
      throw UpdateCheckException(
        UpdateFailureKind.invalidResponse,
        error.message.toString(),
      );
    } catch (_) {
      throw const UpdateCheckException(
        UpdateFailureKind.invalidResponse,
        '更新服务返回格式异常',
      );
    }
  }
}