import { 
  ApiResponse, 
  ListAccountsBody, 
  ListAccountsResponse, 
  BatchDeleteBody, 
  BatchUpdateBody, 
  StatsOverview,
  ScriptUploadItem
} from './types';

const getApiBaseUrl = () => {
  // 检查是否有配置的环境变量（构建时注入）
  const envUrl = process.env.NEXT_PUBLIC_API_BASE_URL;
  if (envUrl && envUrl !== 'undefined') {
    return envUrl;
  }
  
  // 在浏览器环境中，没有配置则使用当前域名
  if (typeof window !== 'undefined') {
    return `${window.location.protocol}//${window.location.hostname}:3006`;
  }
  
  // 服务端渲染时的默认值
  return 'http://localhost:3006';
};

class ApiClient {
  private async request<T>(
    endpoint: string, 
    options: RequestInit = {}
  ): Promise<ApiResponse<T>> {
    const API_BASE_URL = getApiBaseUrl(); // 每次请求时动态获取
    const url = `${API_BASE_URL}${endpoint}`;
    
    const response = await fetch(url, {
      headers: {
        'Content-Type': 'application/json',
        ...options.headers,
      },
      ...options,
    });

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

    return response.json();
  }

  // 获取账户列表
  async getAccountsList(body: ListAccountsBody): Promise<ApiResponse<ListAccountsResponse>> {
    return this.request<ListAccountsResponse>('/web/v1/accounts/list', {
      method: 'POST',
      body: JSON.stringify(body),
    });
  }

  // 批量删除账户
  async batchDeleteAccounts(body: BatchDeleteBody): Promise<ApiResponse<{ deletedCount: number }>> {
    return this.request<{ deletedCount: number }>('/web/v1/accounts/delete-batch', {
      method: 'POST',
      body: JSON.stringify(body),
    });
  }

  // 批量更新账户
  async batchUpdateAccounts(body: BatchUpdateBody): Promise<ApiResponse<{ updatedCount: number }>> {
    return this.request<{ updatedCount: number }>('/web/v1/accounts/update-batch', {
      method: 'POST',
      body: JSON.stringify(body),
    });
  }

  // 获取统计概览
  async getStatsOverview(): Promise<ApiResponse<StatsOverview>> {
    return this.request<StatsOverview>('/web/v1/stats/overview');
  }

  // 上传账户
  async uploadAccounts(accounts: ScriptUploadItem[], ownerId: string): Promise<ApiResponse<{ processedCount: number; createdCount: number; updatedCount: number }>> {
    return this.request<{ processedCount: number; createdCount: number; updatedCount: number }>(`/s/v1/${ownerId}/upload`, {
      method: 'POST',
      body: JSON.stringify(accounts),
    });
  }
}

export const apiClient = new ApiClient();