import { HttpClient, ApiResult, ApiError } from 'common';

/**
 * 后端用户接口 DTO（与后端字段约定对齐）。
 */
export class UserDto {
  id: string = '';
  name: string = '';
  email: string = '';
}

/**
 * 用户相关网络请求服务：负责发请求、解析统一响应、返回 DTO。
 * TODO: BASE_URL 应改为环境注入（debug/release 分离）。
 */
export class UserApi {
  private static readonly BASE_URL: string = 'https://api.example.com';

  private readonly http: HttpClient;

  constructor(http: HttpClient) {
    this.http = http;
  }

  async fetchUser(id: string): Promise<UserDto> {
    const raw = await this.http.get(`${UserApi.BASE_URL}/api/user/${id}`);
    const result = JSON.parse(raw) as ApiResult<UserDto>;
    if (!result.isSuccess()) {
      throw ApiError.business(result.code, result.message);
    }
    return result.data;
  }
}