import { joinURL } from "ufo";
import type { AwsClient } from "./aws4fetch";

class ApiClient {
  private $api: any
  private config?: { baseUrl?: string; headers?: Record<string, string> }

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

  async request(url: string, options: any = {}, 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
    options.body ? (options.body = JSON.stringify(options.body)) : null

    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
    }

    console.log("[request] url:", url)
    console.log("[request] options:", options)

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

    console.log("[request] response:", response);

    if (!response.ok) {
      throw new Error(response.statusText)
    }

    // 处理401
    if (response.status === 401) {
      const message = useMessage()
      message.error('登录信息已过期，请重新登录')
      // 清除登录信息
      await useAuth().logout()
      window.location.href = '/login'
      return
    }

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

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

  async *streamRequest(url: string, options: any = {}) {
    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) {
        console.error("Failed to parse chunk:", error);
      }
    }
  }
  async get(url: string, options?: any) {
    return this.request(url, { method: "GET", ...options })
  }

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

  async delete(url: string, options?: any) {
    return this.request(url, { method: "DELETE", ...options })
  }

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

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

  async head(url: string, options?: any) {
    return this.request(url, { method: "HEAD", ...options })
  }

  async options(url: string, options?: any) {
    return this.request(url, { method: "OPTIONS", ...options })
  }

  async trace(url: string, options?: any) {
    return this.request(url, { method: "TRACE", ...options })
  }
}

export default ApiClient