// Author: fruit.com.cn

import 'dart:convert';
import 'dart:typed_data';

import 'package:dio/dio.dart';

/// 假响应：[body] 会按 UTF-8 编码成字节，[statusCode] 默认 200。
class FakeHttpResponse {
  FakeHttpResponse(this.body, [this.statusCode = 200]);

  final String body;
  final int statusCode;
}

/// dio 的测试替身：把请求交给回调处理，全程不联网。
///
/// 顺带记录每个收到的请求，测试可以直接断言"发了几次、带了什么头"。
class FakeHttpAdapter implements HttpClientAdapter {
  FakeHttpAdapter(this.handler);

  final Future<FakeHttpResponse> Function(RequestOptions options) handler;

  /// 按顺序记录收到的请求，用于断言请求次数与请求头。
  final List<RequestOptions> requests = [];

  @override
  Future<ResponseBody> fetch(
    RequestOptions options,
    Stream<Uint8List>? requestStream,
    Future<void>? cancelFuture,
  ) async {
    requests.add(options);
    final response = await handler(options);
    return ResponseBody.fromBytes(
      utf8.encode(response.body),
      response.statusCode,
      headers: const {
        'content-type': ['application/json; charset=utf-8'],
      },
    );
  }

  @override
  void close({bool force = false}) {}
}