import { joinURL } from 'ufo';
import { parseApiError } from '~/utils/error-handler';
import { logger } from '~/utils/logger';
import type { AwsClient } from './aws4fetch';

interface ApiClientOptions {
  baseUrl?: string;
  headers?: Record<string, string>;
}

interface RequestOptions {
  method?: string;
  headers?: Record<string, string>;
  body?: any;
  params?: Record<string, string>;
}

class ApiClient {
  private $api: AwsClient;
  private config?: ApiClientOptions;

  constructor(api: AwsClient, options?: ApiClientOptions) {
    this.$api = api;
    this.config = options;
  }

  async request(url: string, options: RequestOptions = {}, parseJson: boolean = true) {
    url = this.config?.baseUrl ? joinURL(this.config?.baseUrl, url) : url;
    options.headers = { ...this.config?.headers, ...options.headers };
    // 处理body的数据格式，只对普通对象序列化
    if (options.body &&
        !(options.body instanceof FormData) &&
        !(options.body instanceof Blob) &&
        !(options.body instanceof ArrayBuffer) &&
        !(options.body instanceof Uint8Array) &&
        !(options.body instanceof File)) {
      options.body = JSON.stringify(options.body);
    }

    if (options.params) {
      const queryString = new URLSearchParams(options.params).toString();
      url += `?${queryString}`; // 拼接查询字符串到URL
      delete options.params; // 删除params，以免影响fetch的options
    }

    logger.log('[request] url:', url);
    logger.log('[request] options:', options);

    const response = await this.$api.fetch(url, options);

    logger.log('[request] response:', response);

    if (!response.ok) {
      const errorMsg = await parseApiError(response);
      throw new Error(errorMsg);
    }

    // 处理401
    if (response.status === 401) {
      const message = useMessage();
      // 清除登录信息
      await useAuth().logout();
      window.location.href = '/rustfs/console/auth/login';
      return;
    }

    // 204 or body length is 0
    if (response.status === 204 || response.headers.get('content-length') === '0' || !response.body) {
      return null;
    }

    if (parseJson) {
      return await response.json();
    } else {
      return response;
    }
  }

  async *streamRequest(url: string, options: RequestOptions = {}) {
    const response = await this.request(url, options, false);

    if (!response.body) {
      throw new Error('No response body');
    }

    const reader = response.body.getReader();
    const decoder = new TextDecoder('utf-8');

    while (true) {
      const { done, value } = await reader.read();
      if (done) break;
      const chunk = decoder.decode(value, { stream: true });
      try {
        const data = JSON.parse(chunk);
        yield data; // 使用 yield 返回数据
      } catch (error) {
        logger.error('Failed to parse chunk:', error);
      }
    }
  }
  async get(url: string, options?: RequestOptions) {
    return this.request(url, { method: 'GET', ...options });
  }

  async post(url: string, body: any, options?: RequestOptions) {
    return this.request(url, { method: 'POST', body, ...options });
  }

  async delete(url: string, options?: RequestOptions) {
    return this.request(url, { method: 'DELETE', ...options });
  }

  async put(url: string, body: any, options?: RequestOptions) {
    return this.request(url, { method: 'PUT', body, ...options });
  }

  async patch(url: string, body: any, options?: RequestOptions) {
    return this.request(url, { method: 'PATCH', body, ...options });
  }

  async head(url: string, options?: RequestOptions) {
    return this.request(url, { method: 'HEAD', ...options });
  }

  async options(url: string, options?: RequestOptions) {
    return this.request(url, { method: 'OPTIONS', ...options });
  }

  async trace(url: string, options?: RequestOptions) {
    return this.request(url, { method: 'TRACE', ...options });
  }
}

export default ApiClient;